1832 lines
66 KiB
C++
1832 lines
66 KiB
C++
/* Definitions of target machine for GNU compiler, for IBM RS/6000.
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Copyright (C) 1992 Free Software Foundation, Inc.
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Contributed by Richard Kenner (kenner@nyu.edu)
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Note that some other tm.h files include this one and then override
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many of the definitions that relate to assembler syntax. */
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/* Names to predefine in the preprocessor for this target machine. */
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#define CPP_PREDEFINES "-D_IBMR2 -D_AIX"
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/* Print subsidiary information on the compiler version in use. */
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#define TARGET_VERSION ;
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/* Tell the assembler to assume that all undefined names are external.
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Don't do this until the fixed IBM assembler is more generally available.
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When this becomes permanently defined, the ASM_OUTPUT_EXTERNAL,
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ASM_OUTPUT_EXTERNAL_LIBCALL, and RS6000_OUTPUT_BASENAME macros will no
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longer be needed. */
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/* #define ASM_SPEC "-u" */
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/* Define the options for the binder: Start text at 512, align all segments
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to 512 bytes, and warn if there is text relocation.
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The -bhalt:4 option supposedly changes the level at which ld will abort,
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but it also suppresses warnings about multiply defined symbols and is
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used by the AIX cc command. So we use it here.
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-bnodelcsect undoes a poor choice of default relating to multiply-defined
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csects. See AIX documentation for more information about this. */
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#define LINK_SPEC "-T512 -H512 -btextro -bhalt:4 -bnodelcsect"
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/* Profiled library versions are used by linking with special directories. */
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#define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
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%{p:-L/lib/profiled -L/usr/lib/profiled} %{g*:-lg} -lc"
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/* gcc must do the search itself to find libgcc.a, not use -l. */
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#define LINK_LIBGCC_SPECIAL
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/* Don't turn -B into -L if the argument specifies a relative file name. */
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#define RELATIVE_PREFIX_NOT_LINKDIR
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/* Run-time compilation parameters selecting different hardware subsets. */
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/* Flag to allow putting fp constants in the TOC; can be turned off when
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the TOC overflows. */
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#define TARGET_FP_IN_TOC (target_flags & 1)
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extern int target_flags;
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/* Macro to define tables used to set the flags.
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This is a list in braces of pairs in braces,
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each pair being { "NAME", VALUE }
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where VALUE is the bits to set or minus the bits to clear.
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An empty string NAME is used to identify the default VALUE. */
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#define TARGET_SWITCHES \
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{{"fp-in-toc", 1}, \
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{"no-fp-in-toc", -1}, \
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{ "", TARGET_DEFAULT}}
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#define TARGET_DEFAULT 1
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/* On the RS/6000, we turn on various flags if optimization is selected. */
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#define OPTIMIZATION_OPTIONS(LEVEL) \
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{ \
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if ((LEVEL) > 0) \
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{ \
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flag_force_mem = 1; \
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flag_omit_frame_pointer = 1; \
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} \
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}
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/* Define this to modify the options specified by the user. */
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#define OVERRIDE_OPTIONS \
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{ \
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profile_block_flag = 0; \
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}
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/* target machine storage layout */
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/* Define this if most significant bit is lowest numbered
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in instructions that operate on numbered bit-fields. */
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/* That is true on RS/6000. */
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#define BITS_BIG_ENDIAN 1
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/* Define this if most significant byte of a word is the lowest numbered. */
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/* That is true on RS/6000. */
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#define BYTES_BIG_ENDIAN 1
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/* Define this if most significant word of a multiword number is lowest
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numbered.
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For RS/6000 we can decide arbitrarily since there are no machine
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instructions for them. Might as well be consistent with bits and bytes. */
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#define WORDS_BIG_ENDIAN 1
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/* number of bits in an addressable storage unit */
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#define BITS_PER_UNIT 8
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/* Width in bits of a "word", which is the contents of a machine register.
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Note that this is not necessarily the width of data type `int';
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if using 16-bit ints on a 68000, this would still be 32.
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But on a machine with 16-bit registers, this would be 16. */
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#define BITS_PER_WORD 32
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/* Width of a word, in units (bytes). */
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#define UNITS_PER_WORD 4
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/* Type used for ptrdiff_t, as a string used in a declaration. */
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#define PTRDIFF_TYPE "int"
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/* Type used for wchar_t, as a string used in a declaration. */
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#define WCHAR_TYPE "short unsigned int"
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/* Width of wchar_t in bits. */
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#define WCHAR_TYPE_SIZE 16
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/* Width in bits of a pointer.
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See also the macro `Pmode' defined below. */
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#define POINTER_SIZE 32
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/* Allocation boundary (in *bits*) for storing arguments in argument list. */
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#define PARM_BOUNDARY 32
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/* Boundary (in *bits*) on which stack pointer should be aligned. */
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#define STACK_BOUNDARY 64
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/* Allocation boundary (in *bits*) for the code of a function. */
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#define FUNCTION_BOUNDARY 32
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/* No data type wants to be aligned rounder than this. */
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#define BIGGEST_ALIGNMENT 32
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/* Alignment of field after `int : 0' in a structure. */
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#define EMPTY_FIELD_BOUNDARY 32
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/* Every structure's size must be a multiple of this. */
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#define STRUCTURE_SIZE_BOUNDARY 8
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/* A bitfield declared as `int' forces `int' alignment for the struct. */
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#define PCC_BITFIELD_TYPE_MATTERS 1
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/* Make strings word-aligned so strcpy from constants will be faster. */
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#define CONSTANT_ALIGNMENT(EXP, ALIGN) \
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(TREE_CODE (EXP) == STRING_CST \
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&& (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
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/* Make arrays of chars word-aligned for the same reasons. */
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#define DATA_ALIGNMENT(TYPE, ALIGN) \
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(TREE_CODE (TYPE) == ARRAY_TYPE \
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&& TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
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&& (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
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/* Non-zero if move instructions will actually fail to work
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when given unaligned data. */
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#define STRICT_ALIGNMENT 0
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/* Standard register usage. */
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/* Number of actual hardware registers.
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The hardware registers are assigned numbers for the compiler
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from 0 to just below FIRST_PSEUDO_REGISTER.
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All registers that the compiler knows about must be given numbers,
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even those that are not normally considered general registers.
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RS/6000 has 32 fixed-point registers, 32 floating-point registers,
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an MQ register, a count register, a link register, and 8 condition
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register fields, which we view here as separate registers.
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In addition, the difference between the frame and argument pointers is
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a function of the number of registers saved, so we need to have a
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register for AP that will later be eliminated in favor of SP or FP.
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This is a normal register, but it is fixed. */
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#define FIRST_PSEUDO_REGISTER 76
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/* 1 for registers that have pervasive standard uses
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and are not available for the register allocator.
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On RS/6000, r1 is used for the stack and r2 is used as the TOC pointer.
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cr5 is not supposed to be used. */
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#define FIXED_REGISTERS \
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{0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0}
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/* 1 for registers not available across function calls.
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These must include the FIXED_REGISTERS and also any
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registers that can be used without being saved.
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The latter must include the registers where values are returned
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and the register where structure-value addresses are passed.
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Aside from that, you can include as many other registers as you like. */
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#define CALL_USED_REGISTERS \
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{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1}
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/* List the order in which to allocate registers. Each register must be
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listed once, even those in FIXED_REGISTERS.
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We allocate in the following order:
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fp0 (not saved or used for anything)
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fp13 - fp2 (not saved; incoming fp arg registers)
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fp1 (not saved; return value)
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fp31 - fp14 (saved; order given to save least number)
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cr1, cr6, cr7 (not saved or special)
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cr0 (not saved, but used for arithmetic operations)
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cr2, cr3, cr4 (saved)
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r0 (not saved; cannot be base reg)
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r9 (not saved; best for TImode)
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r11, r10, r8-r4 (not saved; highest used first to make less conflict)
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r3 (not saved; return value register)
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r31 - r13 (saved; order given to save least number)
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r12 (not saved; if used for DImode or DFmode would use r13)
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mq (not saved; best to use it if we can)
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ctr (not saved; when we have the choice ctr is better)
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lr (saved)
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cr5, r1, r2, ap (fixed) */
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#define REG_ALLOC_ORDER \
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{32, \
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45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, \
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33, \
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63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, \
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50, 49, 48, 47, 46, \
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69, 74, 75, 68, 70, 71, 72, \
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0, \
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9, 11, 10, 8, 7, 6, 5, 4, \
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3, \
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31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, \
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18, 17, 16, 15, 14, 13, 12, \
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64, 66, 65, \
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73, 1, 2, 67}
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/* True if register is floating-point. */
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#define FP_REGNO_P(N) ((N) >= 32 && (N) <= 63)
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/* True if register is a condition register. */
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#define CR_REGNO_P(N) ((N) >= 68 && (N) <= 75)
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/* True if register is an integer register. */
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#define INT_REGNO_P(N) ((N) <= 31 || (N) == 67)
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/* Return number of consecutive hard regs needed starting at reg REGNO
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to hold something of mode MODE.
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This is ordinarily the length in words of a value of mode MODE
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but can be less for certain modes in special long registers.
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On RS/6000, ordinary registers hold 32 bits worth;
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a single floating point register holds 64 bits worth. */
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#define HARD_REGNO_NREGS(REGNO, MODE) \
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(FP_REGNO_P (REGNO) \
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? ((GET_MODE_SIZE (MODE) + 2 * UNITS_PER_WORD - 1) / (2 * UNITS_PER_WORD)) \
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: ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
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/* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
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On RS/6000, the cpu registers can hold any mode but the float registers
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can hold only floating modes and CR register can only hold CC modes. We
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cannot put DImode or TImode anywhere except general register and they
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must be able to fit within the register set. */
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#define HARD_REGNO_MODE_OK(REGNO, MODE) \
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(FP_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_FLOAT \
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: CR_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_CC \
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: ! INT_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_INT \
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: 1)
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/* Value is 1 if it is a good idea to tie two pseudo registers
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when one has mode MODE1 and one has mode MODE2.
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If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
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for any hard reg, then this must be 0 for correct output. */
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#define MODES_TIEABLE_P(MODE1, MODE2) \
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(GET_MODE_CLASS (MODE1) == MODE_FLOAT \
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? GET_MODE_CLASS (MODE2) == MODE_FLOAT \
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: GET_MODE_CLASS (MODE2) == MODE_FLOAT \
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? GET_MODE_CLASS (MODE1) == MODE_FLOAT \
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: GET_MODE_CLASS (MODE1) == MODE_CC \
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? GET_MODE_CLASS (MODE2) == MODE_CC \
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: GET_MODE_CLASS (MODE2) == MODE_CC \
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? GET_MODE_CLASS (MODE1) == MODE_CC \
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: 1)
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/* A C expression returning the cost of moving data from a register of class
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CLASS1 to one of CLASS2.
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On the RS/6000, copying between floating-point and fixed-point
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registers is expensive. */
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#define REGISTER_MOVE_COST(CLASS1, CLASS2) \
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((CLASS1) == FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 2 \
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: (CLASS1) == FLOAT_REGS && (CLASS2) != FLOAT_REGS ? 10 \
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: (CLASS1) != FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 10 \
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: 2)
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/* A C expressions returning the cost of moving data of MODE from a register to
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or from memory.
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On the RS/6000, bump this up a bit. */
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#define MEMORY_MOVE_COST(MODE) 4
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/* Specify the cost of a branch insn; roughly the number of extra insns that
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should be added to avoid a branch.
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Set this to 2 on the RS/6000 since that is roughly the average cost of an
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unscheduled conditional branch. */
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#define BRANCH_COST 2
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/* Specify the registers used for certain standard purposes.
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The values of these macros are register numbers. */
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/* RS/6000 pc isn't overloaded on a register that the compiler knows about. */
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/* #define PC_REGNUM */
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/* Register to use for pushing function arguments. */
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#define STACK_POINTER_REGNUM 1
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/* Base register for access to local variables of the function. */
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#define FRAME_POINTER_REGNUM 31
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/* Value should be nonzero if functions must have frame pointers.
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Zero means the frame pointer need not be set up (and parms
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may be accessed via the stack pointer) in functions that seem suitable.
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This is computed in `reload', in reload1.c. */
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#define FRAME_POINTER_REQUIRED 0
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/* Base register for access to arguments of the function. */
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#define ARG_POINTER_REGNUM 67
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|
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/* Place to put static chain when calling a function that requires it. */
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#define STATIC_CHAIN_REGNUM 11
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|
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/* Place that structure value return address is placed.
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On the RS/6000, it is passed as an extra parameter. */
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#define STRUCT_VALUE 0
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|
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/* Define the classes of registers for register constraints in the
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machine description. Also define ranges of constants.
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One of the classes must always be named ALL_REGS and include all hard regs.
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If there is more than one class, another class must be named NO_REGS
|
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and contain no registers.
|
||
|
||
The name GENERAL_REGS must be the name of a class (or an alias for
|
||
another name such as ALL_REGS). This is the class of registers
|
||
that is allowed by "g" or "r" in a register constraint.
|
||
Also, registers outside this class are allocated only when
|
||
instructions express preferences for them.
|
||
|
||
The classes must be numbered in nondecreasing order; that is,
|
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a larger-numbered class must never be contained completely
|
||
in a smaller-numbered class.
|
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|
||
For any two classes, it is very desirable that there be another
|
||
class that represents their union. */
|
||
|
||
/* The RS/6000 has three types of registers, fixed-point, floating-point,
|
||
and condition registers, plus three special registers, MQ, CTR, and the
|
||
link register.
|
||
|
||
However, r0 is special in that it cannot be used as a base register.
|
||
So make a class for registers valid as base registers.
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||
|
||
Also, cr0 is the only condition code register that can be used in
|
||
arithmetic insns, so make a separate class for it. */
|
||
|
||
enum reg_class { NO_REGS, BASE_REGS, GENERAL_REGS, FLOAT_REGS,
|
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NON_SPECIAL_REGS, MQ_REGS, LINK_REGS, CTR_REGS, LINK_OR_CTR_REGS,
|
||
SPECIAL_REGS, CR0_REGS, CR_REGS, ALL_REGS, LIM_REG_CLASSES };
|
||
|
||
#define N_REG_CLASSES (int) LIM_REG_CLASSES
|
||
|
||
/* Give names of register classes as strings for dump file. */
|
||
|
||
#define REG_CLASS_NAMES \
|
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{ "NO_REGS", "BASE_REGS", "GENERAL_REGS", "FLOAT_REGS", \
|
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"NON_SPECIAL_REGS", "MQ_REGS", "LINK_REGS", "CTR_REGS", \
|
||
"LINK_OR_CTR_REGS", "SPECIAL_REGS", "CR0_REGS", "CR_REGS", "ALL_REGS" }
|
||
|
||
/* Define which registers fit in which classes.
|
||
This is an initializer for a vector of HARD_REG_SET
|
||
of length N_REG_CLASSES. */
|
||
|
||
#define REG_CLASS_CONTENTS \
|
||
{ {0, 0, 0}, {0xfffffffe, 0, 8}, {~0, 0, 8}, \
|
||
{0, ~0, 0}, {~0, ~0, 0}, {0, 0, 1}, {0, 0, 2}, \
|
||
{0, 0, 4}, {0, 0, 6}, {0, 0, 7}, {0, 0, 16}, \
|
||
{0, 0, 0xff0}, {~0, ~0, 0xfff5} }
|
||
|
||
/* The same information, inverted:
|
||
Return the class number of the smallest class containing
|
||
reg number REGNO. This could be a conditional expression
|
||
or could index an array. */
|
||
|
||
#define REGNO_REG_CLASS(REGNO) \
|
||
((REGNO) == 0 ? GENERAL_REGS \
|
||
: (REGNO) < 32 ? BASE_REGS \
|
||
: FP_REGNO_P (REGNO) ? FLOAT_REGS \
|
||
: (REGNO) == 68 ? CR0_REGS \
|
||
: CR_REGNO_P (REGNO) ? CR_REGS \
|
||
: (REGNO) == 64 ? MQ_REGS \
|
||
: (REGNO) == 65 ? LINK_REGS \
|
||
: (REGNO) == 66 ? CTR_REGS \
|
||
: (REGNO) == 67 ? BASE_REGS \
|
||
: NO_REGS)
|
||
|
||
/* The class value for index registers, and the one for base regs. */
|
||
#define INDEX_REG_CLASS GENERAL_REGS
|
||
#define BASE_REG_CLASS BASE_REGS
|
||
|
||
/* Get reg_class from a letter such as appears in the machine description. */
|
||
|
||
#define REG_CLASS_FROM_LETTER(C) \
|
||
((C) == 'f' ? FLOAT_REGS \
|
||
: (C) == 'b' ? BASE_REGS \
|
||
: (C) == 'h' ? SPECIAL_REGS \
|
||
: (C) == 'q' ? MQ_REGS \
|
||
: (C) == 'c' ? CTR_REGS \
|
||
: (C) == 'l' ? LINK_REGS \
|
||
: (C) == 'x' ? CR0_REGS \
|
||
: (C) == 'y' ? CR_REGS \
|
||
: NO_REGS)
|
||
|
||
/* The letters I, J, K, L, M, N, and P in a register constraint string
|
||
can be used to stand for particular ranges of immediate operands.
|
||
This macro defines what the ranges are.
|
||
C is the letter, and VALUE is a constant value.
|
||
Return 1 if VALUE is in the range specified by C.
|
||
|
||
`I' is signed 16-bit constants
|
||
`J' is a constant with only the high-order 16 bits non-zero
|
||
`K' is a constant with only the low-order 16 bits non-zero
|
||
`L' is a constant that can be placed into a mask operand
|
||
`M' is a constant that is greater than 31
|
||
`N' is a constant that is an exact power of two
|
||
`O' is the constant zero
|
||
`P' is a constant whose negation is a signed 16-bit constant */
|
||
|
||
#define CONST_OK_FOR_LETTER_P(VALUE, C) \
|
||
( (C) == 'I' ? (unsigned) ((VALUE) + 0x8000) < 0x10000 \
|
||
: (C) == 'J' ? ((VALUE) & 0xffff) == 0 \
|
||
: (C) == 'K' ? ((VALUE) & 0xffff0000) == 0 \
|
||
: (C) == 'L' ? mask_constant (VALUE) \
|
||
: (C) == 'M' ? (VALUE) > 31 \
|
||
: (C) == 'N' ? exact_log2 (VALUE) >= 0 \
|
||
: (C) == 'O' ? (VALUE) == 0 \
|
||
: (C) == 'P' ? (unsigned) ((- (VALUE)) + 0x8000) < 0x1000 \
|
||
: 0)
|
||
|
||
/* Similar, but for floating constants, and defining letters G and H.
|
||
Here VALUE is the CONST_DOUBLE rtx itself.
|
||
|
||
We flag for special constants when we can copy the constant into
|
||
a general register in two insns for DF and one insn for SF. */
|
||
|
||
#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
|
||
((C) == 'G' ? easy_fp_constant (VALUE, GET_MODE (VALUE)) : 0)
|
||
|
||
/* Optional extra constraints for this machine.
|
||
|
||
For the RS/6000, `Q' means that this is a memory operand that is just
|
||
an offset from a register. */
|
||
|
||
#define EXTRA_CONSTRAINT(OP, C) \
|
||
((C) == 'Q' ? indirect_operand (OP, VOIDmode) : 0)
|
||
|
||
/* Given an rtx X being reloaded into a reg required to be
|
||
in class CLASS, return the class of reg to actually use.
|
||
In general this is just CLASS; but on some machines
|
||
in some cases it is preferable to use a more restrictive class.
|
||
|
||
On the RS/6000, we have to return NO_REGS when we want to reload a
|
||
floating-point CONST_DOUBLE to force it to be copied to memory. */
|
||
|
||
#define PREFERRED_RELOAD_CLASS(X,CLASS) \
|
||
((GET_CODE (X) == CONST_DOUBLE \
|
||
&& GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT) \
|
||
? NO_REGS : (CLASS))
|
||
|
||
/* Return the register class of a scratch register needed to copy IN into
|
||
or out of a register in CLASS in MODE. If it can be done directly,
|
||
NO_REGS is returned. */
|
||
|
||
#define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \
|
||
secondary_reload_class (CLASS, MODE, IN)
|
||
|
||
/* Return the maximum number of consecutive registers
|
||
needed to represent mode MODE in a register of class CLASS.
|
||
|
||
On RS/6000, this is the size of MODE in words,
|
||
except in the FP regs, where a single reg is enough for two words. */
|
||
#define CLASS_MAX_NREGS(CLASS, MODE) \
|
||
((CLASS) == FLOAT_REGS \
|
||
? ((GET_MODE_SIZE (MODE) + 2 * UNITS_PER_WORD - 1) / (2 * UNITS_PER_WORD)) \
|
||
: ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
|
||
|
||
/* Stack layout; function entry, exit and calling. */
|
||
|
||
/* Define this if pushing a word on the stack
|
||
makes the stack pointer a smaller address. */
|
||
#define STACK_GROWS_DOWNWARD
|
||
|
||
/* Define this if the nominal address of the stack frame
|
||
is at the high-address end of the local variables;
|
||
that is, each additional local variable allocated
|
||
goes at a more negative offset in the frame.
|
||
|
||
On the RS/6000, we grow upwards, from the area after the outgoing
|
||
arguments. */
|
||
/* #define FRAME_GROWS_DOWNWARD */
|
||
|
||
/* Offset within stack frame to start allocating local variables at.
|
||
If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
|
||
first local allocated. Otherwise, it is the offset to the BEGINNING
|
||
of the first local allocated.
|
||
|
||
On the RS/6000, the frame pointer is the same as the stack pointer,
|
||
except for dynamic allocations. So we start after the fixed area and
|
||
outgoing parameter area. */
|
||
|
||
#define STARTING_FRAME_OFFSET (current_function_outgoing_args_size + 24)
|
||
|
||
/* If we generate an insn to push BYTES bytes,
|
||
this says how many the stack pointer really advances by.
|
||
On RS/6000, don't define this because there are no push insns. */
|
||
/* #define PUSH_ROUNDING(BYTES) */
|
||
|
||
/* Offset of first parameter from the argument pointer register value.
|
||
On the RS/6000, we define the argument pointer to the start of the fixed
|
||
area. */
|
||
#define FIRST_PARM_OFFSET(FNDECL) 24
|
||
|
||
/* Define this if stack space is still allocated for a parameter passed
|
||
in a register. The value is the number of bytes allocated to this
|
||
area. */
|
||
#define REG_PARM_STACK_SPACE(FNDECL) 32
|
||
|
||
/* Define this if the above stack space is to be considered part of the
|
||
space allocated by the caller. */
|
||
#define OUTGOING_REG_PARM_STACK_SPACE
|
||
|
||
/* This is the difference between the logical top of stack and the actual sp.
|
||
|
||
For the RS/6000, sp points past the fixed area. */
|
||
#define STACK_POINTER_OFFSET 24
|
||
|
||
/* Define this if the maximum size of all the outgoing args is to be
|
||
accumulated and pushed during the prologue. The amount can be
|
||
found in the variable current_function_outgoing_args_size. */
|
||
#define ACCUMULATE_OUTGOING_ARGS
|
||
|
||
/* Value is the number of bytes of arguments automatically
|
||
popped when returning from a subroutine call.
|
||
FUNTYPE is the data type of the function (as a tree),
|
||
or for a library call it is an identifier node for the subroutine name.
|
||
SIZE is the number of bytes of arguments passed on the stack. */
|
||
|
||
#define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
|
||
|
||
/* Define how to find the value returned by a function.
|
||
VALTYPE is the data type of the value (as a tree).
|
||
If the precise function being called is known, FUNC is its FUNCTION_DECL;
|
||
otherwise, FUNC is 0.
|
||
|
||
On RS/6000 an integer value is in r3 and a floating-point value is in
|
||
fp1. */
|
||
|
||
#define FUNCTION_VALUE(VALTYPE, FUNC) \
|
||
gen_rtx (REG, TYPE_MODE (VALTYPE), \
|
||
TREE_CODE (VALTYPE) == REAL_TYPE ? 33 : 3)
|
||
|
||
/* Define how to find the value returned by a library function
|
||
assuming the value has mode MODE. */
|
||
|
||
#define LIBCALL_VALUE(MODE) \
|
||
gen_rtx (REG, MODE, GET_MODE_CLASS (MODE) == MODE_FLOAT ? 33 : 3)
|
||
|
||
/* The definition of this macro implies that there are cases where
|
||
a scalar value cannot be returned in registers.
|
||
|
||
For the RS/6000, any structure or union type is returned in memory. */
|
||
|
||
#define RETURN_IN_MEMORY(TYPE) \
|
||
(TREE_CODE (TYPE) == RECORD_TYPE || TREE_CODE (TYPE) == UNION_TYPE)
|
||
|
||
/* 1 if N is a possible register number for a function value
|
||
as seen by the caller.
|
||
|
||
On RS/6000, this is r3 and fp1. */
|
||
|
||
#define FUNCTION_VALUE_REGNO_P(N) ((N) == 3 || ((N) == 33))
|
||
|
||
/* 1 if N is a possible register number for function argument passing.
|
||
On RS/6000, these are r3-r10 and fp1-fp13. */
|
||
|
||
#define FUNCTION_ARG_REGNO_P(N) \
|
||
(((N) <= 10 && (N) >= 3) || ((N) >= 33 && (N) <= 45))
|
||
|
||
/* Define a data type for recording info about an argument list
|
||
during the scan of that argument list. This data type should
|
||
hold all necessary information about the function itself
|
||
and about the args processed so far, enough to enable macros
|
||
such as FUNCTION_ARG to determine where the next arg should go.
|
||
|
||
On the RS/6000, this is a structure. The first element is the number of
|
||
total argument words, the second is used to store the next
|
||
floating-point register number, and the third says how many more args we
|
||
have prototype types for. */
|
||
|
||
struct rs6000_args {int words, fregno, nargs_prototype; };
|
||
#define CUMULATIVE_ARGS struct rs6000_args
|
||
|
||
/* Define intermediate macro to compute the size (in registers) of an argument
|
||
for the RS/6000. */
|
||
|
||
#define RS6000_ARG_SIZE(MODE, TYPE, NAMED) \
|
||
(! (NAMED) ? 0 \
|
||
: (MODE) != BLKmode \
|
||
? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD \
|
||
: (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
|
||
|
||
/* Initialize a variable CUM of type CUMULATIVE_ARGS
|
||
for a call to a function whose data type is FNTYPE.
|
||
For a library call, FNTYPE is 0. */
|
||
|
||
#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) \
|
||
(CUM).words = 0, \
|
||
(CUM).fregno = 33, \
|
||
(CUM).nargs_prototype = (FNTYPE && TYPE_ARG_TYPES (FNTYPE) \
|
||
? (list_length (TYPE_ARG_TYPES (FNTYPE)) - 1 \
|
||
+ (TYPE_MODE (TREE_TYPE (FNTYPE)) == BLKmode \
|
||
|| RETURN_IN_MEMORY (TREE_TYPE (FNTYPE)))) \
|
||
: 0)
|
||
|
||
/* Similar, but when scanning the definition of a procedure. We always
|
||
set NARGS_PROTOTYPE large so we never return an EXPR_LIST. */
|
||
|
||
#define INIT_CUMULATIVE_INCOMING_ARGS(CUM,FNTYPE,IGNORE) \
|
||
(CUM).words = 0, \
|
||
(CUM).fregno = 33, \
|
||
(CUM).nargs_prototype = 1000
|
||
|
||
/* Update the data in CUM to advance over an argument
|
||
of mode MODE and data type TYPE.
|
||
(TYPE is null for libcalls where that information may not be available.) */
|
||
|
||
#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
|
||
{ (CUM).nargs_prototype--; \
|
||
if (NAMED) \
|
||
{ \
|
||
(CUM).words += RS6000_ARG_SIZE (MODE, TYPE, NAMED); \
|
||
if (GET_MODE_CLASS (MODE) == MODE_FLOAT) \
|
||
(CUM).fregno++; \
|
||
} \
|
||
}
|
||
|
||
/* Non-zero if we can use a floating-point register to pass this arg. */
|
||
#define USE_FP_FOR_ARG_P(CUM,MODE,TYPE) \
|
||
(GET_MODE_CLASS (MODE) == MODE_FLOAT && (CUM).fregno < 46)
|
||
|
||
/* Determine where to put an argument to a function.
|
||
Value is zero to push the argument on the stack,
|
||
or a hard register in which to store the argument.
|
||
|
||
MODE is the argument's machine mode.
|
||
TYPE is the data type of the argument (as a tree).
|
||
This is null for libcalls where that information may
|
||
not be available.
|
||
CUM is a variable of type CUMULATIVE_ARGS which gives info about
|
||
the preceding args and about the function being called.
|
||
NAMED is nonzero if this argument is a named parameter
|
||
(otherwise it is an extra parameter matching an ellipsis).
|
||
|
||
On RS/6000 the first eight words of non-FP are normally in registers
|
||
and the rest are pushed. The first 13 FP args are in registers.
|
||
|
||
If this is floating-point and no prototype is specified, we use
|
||
both an FP and integer register (or possibly FP reg and stack). */
|
||
|
||
#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
|
||
(! (NAMED) ? 0 \
|
||
: USE_FP_FOR_ARG_P (CUM, MODE, TYPE) \
|
||
? ((CUM).nargs_prototype > 0 \
|
||
? gen_rtx (REG, MODE, (CUM).fregno) \
|
||
: ((CUM).words < 8 \
|
||
? gen_rtx (EXPR_LIST, VOIDmode, \
|
||
gen_rtx (REG, (MODE), 3 + (CUM).words), \
|
||
gen_rtx (REG, (MODE), (CUM).fregno)) \
|
||
: gen_rtx (EXPR_LIST, VOIDmode, 0, \
|
||
gen_rtx (REG, (MODE), (CUM).fregno)))) \
|
||
: (CUM).words < 8 ? gen_rtx(REG, (MODE), 3 + (CUM).words) : 0)
|
||
|
||
/* For an arg passed partly in registers and partly in memory,
|
||
this is the number of registers used.
|
||
For args passed entirely in registers or entirely in memory, zero. */
|
||
|
||
#define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
|
||
(! (NAMED) ? 0 \
|
||
: USE_FP_FOR_ARG_P (CUM, MODE, TYPE) && (CUM).nargs_prototype >= 0 ? 0 \
|
||
: (((CUM).words < 8 \
|
||
&& 8 < ((CUM).words + RS6000_ARG_SIZE (MODE, TYPE, NAMED))) \
|
||
? 8 - (CUM).words : 0))
|
||
|
||
/* Perform any needed actions needed for a function that is receiving a
|
||
variable number of arguments.
|
||
|
||
CUM is as above.
|
||
|
||
MODE and TYPE are the mode and type of the current parameter.
|
||
|
||
PRETEND_SIZE is a variable that should be set to the amount of stack
|
||
that must be pushed by the prolog to pretend that our caller pushed
|
||
it.
|
||
|
||
Normally, this macro will push all remaining incoming registers on the
|
||
stack and set PRETEND_SIZE to the length of the registers pushed. */
|
||
|
||
#define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \
|
||
{ if ((CUM).words < 8) \
|
||
{ \
|
||
int first_reg_offset = (CUM).words; \
|
||
\
|
||
if (MUST_PASS_IN_STACK (MODE, TYPE)) \
|
||
first_reg_offset += RS6000_ARG_SIZE (TYPE_MODE (TYPE), TYPE, 1); \
|
||
\
|
||
if (first_reg_offset > 8) \
|
||
first_reg_offset = 8; \
|
||
\
|
||
if (! (NO_RTL) && first_reg_offset != 8) \
|
||
move_block_from_reg \
|
||
(3 + first_reg_offset, \
|
||
gen_rtx (MEM, BLKmode, \
|
||
plus_constant (virtual_incoming_args_rtx, \
|
||
first_reg_offset * 4)), \
|
||
8 - first_reg_offset); \
|
||
PRETEND_SIZE = (8 - first_reg_offset) * UNITS_PER_WORD; \
|
||
} \
|
||
}
|
||
|
||
/* This macro generates the assembly code for function entry.
|
||
FILE is a stdio stream to output the code to.
|
||
SIZE is an int: how many units of temporary storage to allocate.
|
||
Refer to the array `regs_ever_live' to determine which registers
|
||
to save; `regs_ever_live[I]' is nonzero if register number I
|
||
is ever used in the function. This macro is responsible for
|
||
knowing which registers should not be saved even if used. */
|
||
|
||
#define FUNCTION_PROLOGUE(FILE, SIZE) output_prolog (FILE, SIZE)
|
||
|
||
/* Output assembler code to FILE to increment profiler label # LABELNO
|
||
for profiling a function entry. */
|
||
|
||
#define FUNCTION_PROFILER(FILE, LABELNO) \
|
||
output_function_profiler ((FILE), (LABELNO));
|
||
|
||
/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
|
||
the stack pointer does not matter. No definition is equivalent to
|
||
always zero.
|
||
|
||
On the RS/6000, this is non-zero because we can restore the stack from
|
||
its backpointer, which we maintain. */
|
||
#define EXIT_IGNORE_STACK 1
|
||
|
||
/* This macro generates the assembly code for function exit,
|
||
on machines that need it. If FUNCTION_EPILOGUE is not defined
|
||
then individual return instructions are generated for each
|
||
return statement. Args are same as for FUNCTION_PROLOGUE.
|
||
|
||
The function epilogue should not depend on the current stack pointer!
|
||
It should use the frame pointer only. This is mandatory because
|
||
of alloca; we also take advantage of it to omit stack adjustments
|
||
before returning. */
|
||
|
||
#define FUNCTION_EPILOGUE(FILE, SIZE) output_epilog (FILE, SIZE)
|
||
|
||
/* Output assembler code for a block containing the constant parts
|
||
of a trampoline, leaving space for the variable parts.
|
||
|
||
The trampoline should set the static chain pointer to value placed
|
||
into the trampoline and should branch to the specified routine.
|
||
|
||
On the RS/6000, this is not code at all, but merely a data area,
|
||
since that is the way all functions are called. The first word is
|
||
the address of the function, the second word is the TOC pointer (r2),
|
||
and the third word is the static chain value. */
|
||
|
||
#define TRAMPOLINE_TEMPLATE(FILE) { fprintf (FILE, "\t.long 0, 0, 0\n"); }
|
||
|
||
/* Length in units of the trampoline for entering a nested function. */
|
||
|
||
#define TRAMPOLINE_SIZE 12
|
||
|
||
/* Emit RTL insns to initialize the variable parts of a trampoline.
|
||
FNADDR is an RTX for the address of the function's pure code.
|
||
CXT is an RTX for the static chain value for the function. */
|
||
|
||
#define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, CXT) \
|
||
{ \
|
||
emit_move_insn (gen_rtx (MEM, SImode, memory_address (SImode, ADDR)), \
|
||
force_reg (SImode, FNADDR)); \
|
||
emit_move_insn (gen_rtx (MEM, SImode, \
|
||
memory_address (SImode, plus_constant (ADDR, 4))), \
|
||
gen_rtx (REG, SImode, 2)); \
|
||
emit_move_insn (gen_rtx (MEM, SImode, \
|
||
memory_address (SImode, plus_constant (ADDR, 8))), \
|
||
force_reg (SImode, CXT)); \
|
||
}
|
||
|
||
/* Definitions for register eliminations.
|
||
|
||
We have two registers that can be eliminated on the RS/6000. First, the
|
||
frame pointer register can often be eliminated in favor of the stack
|
||
pointer register. Secondly, the argument pointer register can always be
|
||
eliminated; it is replaced with either the stack or frame pointer. */
|
||
|
||
/* This is an array of structures. Each structure initializes one pair
|
||
of eliminable registers. The "from" register number is given first,
|
||
followed by "to". Eliminations of the same "from" register are listed
|
||
in order of preference. */
|
||
#define ELIMINABLE_REGS \
|
||
{{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
|
||
{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
|
||
{ ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM} }
|
||
|
||
/* Given FROM and TO register numbers, say whether this elimination is allowed.
|
||
Frame pointer elimination is automatically handled.
|
||
|
||
For the RS/6000, if frame pointer elimination is being done, we would like
|
||
to convert ap into fp, not sp. */
|
||
|
||
#define CAN_ELIMINATE(FROM, TO) \
|
||
((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
|
||
? ! frame_pointer_needed \
|
||
: 1)
|
||
|
||
/* Define the offset between two registers, one to be eliminated, and the other
|
||
its replacement, at the start of a routine. */
|
||
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
|
||
{ \
|
||
int total_stack_size = (rs6000_sa_size () + get_frame_size () \
|
||
+ current_function_outgoing_args_size); \
|
||
\
|
||
total_stack_size = (total_stack_size + 7) & ~7; \
|
||
\
|
||
if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
|
||
{ \
|
||
if (rs6000_pushes_stack ()) \
|
||
(OFFSET) = 0; \
|
||
else \
|
||
(OFFSET) = - total_stack_size; \
|
||
} \
|
||
else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \
|
||
(OFFSET) = total_stack_size; \
|
||
else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
|
||
{ \
|
||
if (rs6000_pushes_stack ()) \
|
||
(OFFSET) = total_stack_size; \
|
||
else \
|
||
(OFFSET) = 0; \
|
||
} \
|
||
else \
|
||
abort (); \
|
||
}
|
||
|
||
/* Addressing modes, and classification of registers for them. */
|
||
|
||
/* #define HAVE_POST_INCREMENT */
|
||
/* #define HAVE_POST_DECREMENT */
|
||
|
||
#define HAVE_PRE_DECREMENT
|
||
#define HAVE_PRE_INCREMENT
|
||
|
||
/* Macros to check register numbers against specific register classes. */
|
||
|
||
/* These assume that REGNO is a hard or pseudo reg number.
|
||
They give nonzero only if REGNO is a hard reg of the suitable class
|
||
or a pseudo reg currently allocated to a suitable hard reg.
|
||
Since they use reg_renumber, they are safe only once reg_renumber
|
||
has been allocated, which happens in local-alloc.c. */
|
||
|
||
#define REGNO_OK_FOR_INDEX_P(REGNO) \
|
||
((REGNO) < FIRST_PSEUDO_REGISTER \
|
||
? (REGNO) <= 31 || (REGNO) == 67 \
|
||
: (reg_renumber[REGNO] >= 0 \
|
||
&& (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67)))
|
||
|
||
#define REGNO_OK_FOR_BASE_P(REGNO) \
|
||
((REGNO) < FIRST_PSEUDO_REGISTER \
|
||
? ((REGNO) > 0 && (REGNO) <= 31) || (REGNO) == 67 \
|
||
: (reg_renumber[REGNO] > 0 \
|
||
&& (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67)))
|
||
|
||
/* Maximum number of registers that can appear in a valid memory address. */
|
||
|
||
#define MAX_REGS_PER_ADDRESS 2
|
||
|
||
/* Recognize any constant value that is a valid address. */
|
||
|
||
#define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
|
||
|
||
/* Nonzero if the constant value X is a legitimate general operand.
|
||
It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
|
||
|
||
On the RS/6000, all integer constants are acceptable, most won't be valid
|
||
for particular insns, though. Only easy FP constants are
|
||
acceptable. */
|
||
|
||
#define LEGITIMATE_CONSTANT_P(X) \
|
||
(GET_CODE (X) != CONST_DOUBLE || GET_MODE (X) == VOIDmode \
|
||
|| easy_fp_constant (X, GET_MODE (X)))
|
||
|
||
/* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
|
||
and check its validity for a certain class.
|
||
We have two alternate definitions for each of them.
|
||
The usual definition accepts all pseudo regs; the other rejects
|
||
them unless they have been allocated suitable hard regs.
|
||
The symbol REG_OK_STRICT causes the latter definition to be used.
|
||
|
||
Most source files want to accept pseudo regs in the hope that
|
||
they will get allocated to the class that the insn wants them to be in.
|
||
Source files for reload pass need to be strict.
|
||
After reload, it makes no difference, since pseudo regs have
|
||
been eliminated by then. */
|
||
|
||
#ifndef REG_OK_STRICT
|
||
|
||
/* Nonzero if X is a hard reg that can be used as an index
|
||
or if it is a pseudo reg. */
|
||
#define REG_OK_FOR_INDEX_P(X) \
|
||
(REGNO (X) <= 31 || REGNO (X) == 67 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
|
||
|
||
/* Nonzero if X is a hard reg that can be used as a base reg
|
||
or if it is a pseudo reg. */
|
||
#define REG_OK_FOR_BASE_P(X) \
|
||
(REGNO (X) > 0 && REG_OK_FOR_INDEX_P (X))
|
||
|
||
#else
|
||
|
||
/* Nonzero if X is a hard reg that can be used as an index. */
|
||
#define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
|
||
/* Nonzero if X is a hard reg that can be used as a base reg. */
|
||
#define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
|
||
|
||
#endif
|
||
|
||
/* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
|
||
that is a valid memory address for an instruction.
|
||
The MODE argument is the machine mode for the MEM expression
|
||
that wants to use this address.
|
||
|
||
On the RS/6000, there are four valid address: a SYMBOL_REF that
|
||
refers to a constant pool entry of an address (or the sum of it
|
||
plus a constant), a short (16-bit signed) constant plus a register,
|
||
the sum of two registers, or a register indirect, possibly with an
|
||
auto-increment. For DFmode and DImode with an constant plus register,
|
||
we must ensure that both words are addressable. */
|
||
|
||
#define LEGITIMATE_CONSTANT_POOL_BASE_P(X) \
|
||
(GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X) \
|
||
&& ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (get_pool_constant (X)))
|
||
|
||
#define LEGITIMATE_CONSTANT_POOL_ADDRESS_P(X) \
|
||
(LEGITIMATE_CONSTANT_POOL_BASE_P (X) \
|
||
|| (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
|
||
&& GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \
|
||
&& LEGITIMATE_CONSTANT_POOL_BASE_P (XEXP (XEXP (X, 0), 0))))
|
||
|
||
#define LEGITIMATE_ADDRESS_INTEGER_P(X,OFFSET) \
|
||
(GET_CODE (X) == CONST_INT \
|
||
&& (unsigned) (INTVAL (X) + (OFFSET) + 0x8000) < 0x10000)
|
||
|
||
#define LEGITIMATE_OFFSET_ADDRESS_P(MODE,X) \
|
||
(GET_CODE (X) == PLUS \
|
||
&& GET_CODE (XEXP (X, 0)) == REG \
|
||
&& REG_OK_FOR_BASE_P (XEXP (X, 0)) \
|
||
&& LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 0) \
|
||
&& (((MODE) != DFmode && (MODE) != DImode) \
|
||
|| LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 4)))
|
||
|
||
#define LEGITIMATE_INDEXED_ADDRESS_P(X) \
|
||
(GET_CODE (X) == PLUS \
|
||
&& GET_CODE (XEXP (X, 0)) == REG \
|
||
&& GET_CODE (XEXP (X, 1)) == REG \
|
||
&& ((REG_OK_FOR_BASE_P (XEXP (X, 0)) \
|
||
&& REG_OK_FOR_INDEX_P (XEXP (X, 1))) \
|
||
|| (REG_OK_FOR_BASE_P (XEXP (X, 1)) \
|
||
&& REG_OK_FOR_INDEX_P (XEXP (X, 0)))))
|
||
|
||
#define LEGITIMATE_INDIRECT_ADDRESS_P(X) \
|
||
(GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))
|
||
|
||
#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
|
||
{ if (LEGITIMATE_INDIRECT_ADDRESS_P (X)) \
|
||
goto ADDR; \
|
||
if (GET_CODE (X) == PRE_INC \
|
||
&& LEGITIMATE_INDIRECT_ADDRESS_P (XEXP (X, 0))) \
|
||
goto ADDR; \
|
||
if (GET_CODE (X) == PRE_DEC \
|
||
&& LEGITIMATE_INDIRECT_ADDRESS_P (XEXP (X, 0))) \
|
||
goto ADDR; \
|
||
if (LEGITIMATE_CONSTANT_POOL_ADDRESS_P (X)) \
|
||
goto ADDR; \
|
||
if (LEGITIMATE_OFFSET_ADDRESS_P (MODE, X)) \
|
||
goto ADDR; \
|
||
if ((MODE) != DImode && (MODE) != TImode \
|
||
&& LEGITIMATE_INDEXED_ADDRESS_P (X)) \
|
||
goto ADDR; \
|
||
}
|
||
|
||
/* Try machine-dependent ways of modifying an illegitimate address
|
||
to be legitimate. If we find one, return the new, valid address.
|
||
This macro is used in only one place: `memory_address' in explow.c.
|
||
|
||
OLDX is the address as it was before break_out_memory_refs was called.
|
||
In some cases it is useful to look at this to decide what needs to be done.
|
||
|
||
MODE and WIN are passed so that this macro can use
|
||
GO_IF_LEGITIMATE_ADDRESS.
|
||
|
||
It is always safe for this macro to do nothing. It exists to recognize
|
||
opportunities to optimize the output.
|
||
|
||
On RS/6000, first check for the sum of a register with a constant
|
||
integer that is out of range. If so, generate code to add the
|
||
constant with the low-order 16 bits masked to the register and force
|
||
this result into another register (this can be done with `cau').
|
||
Then generate an address of REG+(CONST&0xffff), allowing for the
|
||
possibility of bit 16 being a one.
|
||
|
||
Then check for the sum of a register and something not constant, try to
|
||
load the other things into a register and return the sum. */
|
||
|
||
#define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
|
||
{ if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
|
||
&& GET_CODE (XEXP (X, 1)) == CONST_INT \
|
||
&& (unsigned) (INTVAL (XEXP (X, 1)) + 0x8000) >= 0x10000) \
|
||
{ int high_int, low_int; \
|
||
high_int = INTVAL (XEXP (X, 1)) >> 16; \
|
||
low_int = INTVAL (XEXP (X, 1)) & 0xffff; \
|
||
if (low_int & 0x8000) \
|
||
high_int += 1, low_int |= 0xffff0000; \
|
||
(X) = gen_rtx (PLUS, SImode, \
|
||
force_operand \
|
||
(gen_rtx (PLUS, SImode, XEXP (X, 0), \
|
||
gen_rtx (CONST_INT, VOIDmode, \
|
||
high_int << 16)), 0),\
|
||
gen_rtx (CONST_INT, VOIDmode, low_int)); \
|
||
goto WIN; \
|
||
} \
|
||
else if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
|
||
&& GET_CODE (XEXP (X, 1)) != CONST_INT) \
|
||
{ \
|
||
(X) = gen_rtx (PLUS, SImode, XEXP (X, 0), \
|
||
force_reg (SImode, force_operand (XEXP (X, 1), 0))); \
|
||
goto WIN; \
|
||
} \
|
||
}
|
||
|
||
/* Go to LABEL if ADDR (a legitimate address expression)
|
||
has an effect that depends on the machine mode it is used for.
|
||
|
||
On the RS/6000 this is true if the address is valid with a zero offset
|
||
but not with an offset of four (this means it cannot be used as an
|
||
address for DImode or DFmode) or is a pre-increment or decrement. Since
|
||
we know it is valid, we just check for an address that is not valid with
|
||
an offset of four. */
|
||
|
||
#define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
|
||
{ if (GET_CODE (ADDR) == PLUS \
|
||
&& LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 0) \
|
||
&& ! LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 4)) \
|
||
goto LABEL; \
|
||
if (GET_CODE (ADDR) == PRE_INC) \
|
||
goto LABEL; \
|
||
if (GET_CODE (ADDR) == PRE_DEC) \
|
||
goto LABEL; \
|
||
}
|
||
|
||
/* Define this if some processing needs to be done immediately before
|
||
emitting code for an insn. */
|
||
|
||
/* #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) */
|
||
|
||
/* Specify the machine mode that this machine uses
|
||
for the index in the tablejump instruction. */
|
||
#define CASE_VECTOR_MODE SImode
|
||
|
||
/* Define this if the tablejump instruction expects the table
|
||
to contain offsets from the address of the table.
|
||
Do not define this if the table should contain absolute addresses. */
|
||
#define CASE_VECTOR_PC_RELATIVE
|
||
|
||
/* Specify the tree operation to be used to convert reals to integers. */
|
||
#define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
|
||
|
||
/* This is the kind of divide that is easiest to do in the general case. */
|
||
#define EASY_DIV_EXPR TRUNC_DIV_EXPR
|
||
|
||
/* Define this as 1 if `char' should by default be signed; else as 0. */
|
||
#define DEFAULT_SIGNED_CHAR 0
|
||
|
||
/* This flag, if defined, says the same insns that convert to a signed fixnum
|
||
also convert validly to an unsigned one. */
|
||
|
||
/* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
|
||
|
||
/* Max number of bytes we can move from memory to memory
|
||
in one reasonably fast instruction. */
|
||
#define MOVE_MAX 16
|
||
|
||
/* Nonzero if access to memory by bytes is no faster than for words.
|
||
Also non-zero if doing byte operations (specifically shifts) in registers
|
||
is undesirable. */
|
||
#define SLOW_BYTE_ACCESS 1
|
||
|
||
/* Define if normal loads of shorter-than-word items from memory clears
|
||
the rest of the bigs in the register. */
|
||
#define BYTE_LOADS_ZERO_EXTEND
|
||
|
||
/* The RS/6000 uses the XCOFF format. */
|
||
|
||
#define XCOFF_DEBUGGING_INFO
|
||
|
||
/* Define if the object format being used is COFF or a superset. */
|
||
#define OBJECT_FORMAT_COFF
|
||
|
||
/* We don't have GAS for the RS/6000 yet, so don't write out special
|
||
.stabs in cc1plus. */
|
||
|
||
#define FASCIST_ASSEMBLER
|
||
|
||
/* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
|
||
is done just by pretending it is already truncated. */
|
||
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
|
||
|
||
/* Specify the machine mode that pointers have.
|
||
After generation of rtl, the compiler makes no further distinction
|
||
between pointers and any other objects of this machine mode. */
|
||
#define Pmode SImode
|
||
|
||
/* Mode of a function address in a call instruction (for indexing purposes).
|
||
|
||
Doesn't matter on RS/6000. */
|
||
#define FUNCTION_MODE SImode
|
||
|
||
/* Define this if addresses of constant functions
|
||
shouldn't be put through pseudo regs where they can be cse'd.
|
||
Desirable on machines where ordinary constants are expensive
|
||
but a CALL with constant address is cheap. */
|
||
#define NO_FUNCTION_CSE
|
||
|
||
/* Define this if shift instructions ignore all but the low-order
|
||
few bits. */
|
||
#define SHIFT_COUNT_TRUNCATED
|
||
|
||
/* Use atexit for static constructors/destructors, instead of defining
|
||
our own exit function. */
|
||
#define HAVE_ATEXIT
|
||
|
||
/* Compute the cost of computing a constant rtl expression RTX
|
||
whose rtx-code is CODE. The body of this macro is a portion
|
||
of a switch statement. If the code is computed here,
|
||
return it with a return statement. Otherwise, break from the switch.
|
||
|
||
On the RS/6000, if it is legal in the insn, it is free. So this
|
||
always returns 0. */
|
||
|
||
#define CONST_COSTS(RTX,CODE,OUTER_CODE) \
|
||
case CONST_INT: \
|
||
case CONST: \
|
||
case LABEL_REF: \
|
||
case SYMBOL_REF: \
|
||
case CONST_DOUBLE: \
|
||
return 0;
|
||
|
||
/* Provide the costs of a rtl expression. This is in the body of a
|
||
switch on CODE. */
|
||
|
||
#define RTX_COSTS(X,CODE,OUTER_CODE) \
|
||
case MULT: \
|
||
return (GET_CODE (XEXP (X, 1)) != CONST_INT \
|
||
? COSTS_N_INSNS (5) \
|
||
: INTVAL (XEXP (X, 1)) >= -256 && INTVAL (XEXP (X, 1)) <= 255 \
|
||
? COSTS_N_INSNS (3) : COSTS_N_INSNS (4)); \
|
||
case DIV: \
|
||
case MOD: \
|
||
if (GET_CODE (XEXP (X, 1)) == CONST_INT \
|
||
&& exact_log2 (INTVAL (XEXP (X, 1))) >= 0) \
|
||
return COSTS_N_INSNS (2); \
|
||
/* otherwise fall through to normal divide. */ \
|
||
case UDIV: \
|
||
case UMOD: \
|
||
return COSTS_N_INSNS (19); \
|
||
case MEM: \
|
||
/* MEM should be slightly more expensive than (plus (reg) (const)) */ \
|
||
return 5;
|
||
|
||
/* Compute the cost of an address. This is meant to approximate the size
|
||
and/or execution delay of an insn using that address. If the cost is
|
||
approximated by the RTL complexity, including CONST_COSTS above, as
|
||
is usually the case for CISC machines, this macro should not be defined.
|
||
For aggressively RISCy machines, only one insn format is allowed, so
|
||
this macro should be a constant. The value of this macro only matters
|
||
for valid addresses.
|
||
|
||
For the RS/6000, everything is cost 0. */
|
||
|
||
#define ADDRESS_COST(RTX) 0
|
||
|
||
/* Adjust the length of an INSN. LENGTH is the currently-computed length and
|
||
should be adjusted to reflect any required changes. This macro is used when
|
||
there is some systematic length adjustment required that would be difficult
|
||
to express in the length attribute. */
|
||
|
||
/* #define ADJUST_INSN_LENGTH(X,LENGTH) */
|
||
|
||
/* Add any extra modes needed to represent the condition code.
|
||
|
||
For the RS/6000, we need separate modes when unsigned (logical) comparisons
|
||
are being done and we need a separate mode for floating-point. We also
|
||
use a mode for the case when we are comparing the results of two
|
||
comparisons. */
|
||
|
||
#define EXTRA_CC_MODES CCUNSmode, CCFPmode, CCEQmode
|
||
|
||
/* Define the names for the modes specified above. */
|
||
#define EXTRA_CC_NAMES "CCUNS", "CCFP", "CCEQ"
|
||
|
||
/* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
|
||
return the mode to be used for the comparison. For floating-point, CCFPmode
|
||
should be used. CCUNSmode should be used for unsigned comparisons.
|
||
CCEQmode should be used when we are doing an inequality comparison on
|
||
the result of a comparison. CCmode should be used in all other cases. */
|
||
|
||
#define SELECT_CC_MODE(OP,X) \
|
||
(GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? CCFPmode \
|
||
: (OP) == GTU || (OP) == LTU || (OP) == GEU || (OP) == LEU ? CCUNSmode \
|
||
: (((OP) == EQ || (OP) == NE) && GET_RTX_CLASS (GET_CODE (X)) == '<' \
|
||
? CCEQmode : CCmode))
|
||
|
||
/* Define the information needed to generate branch and scc insns. This is
|
||
stored from the compare operation. Note that we can't use "rtx" here
|
||
since it hasn't been defined! */
|
||
|
||
extern struct rtx_def *rs6000_compare_op0, *rs6000_compare_op1;
|
||
extern int rs6000_compare_fp_p;
|
||
|
||
/* Set to non-zero by "fix" operation to indicate that itrunc and
|
||
uitrunc must be defined. */
|
||
|
||
extern int rs6000_trunc_used;
|
||
|
||
/* Control the assembler format that we output. */
|
||
|
||
/* Output at beginning of assembler file.
|
||
|
||
On the RS/6000, we want to go into the TOC section so at least one
|
||
.toc will be emitted.
|
||
|
||
Also initialize the section names for the RS/6000 at this point.
|
||
|
||
Also, in order to output proper .bs/.es pairs, we need at least one static
|
||
[RW] section emitted. */
|
||
|
||
#define ASM_FILE_START(FILE) \
|
||
{ \
|
||
rs6000_gen_section_name (&xcoff_bss_section_name, \
|
||
main_input_filename, ".bss_"); \
|
||
rs6000_gen_section_name (&xcoff_private_data_section_name, \
|
||
main_input_filename, ".rw_"); \
|
||
rs6000_gen_section_name (&xcoff_read_only_section_name, \
|
||
main_input_filename, ".ro_"); \
|
||
\
|
||
toc_section (); \
|
||
if (write_symbols != NO_DEBUG) \
|
||
private_data_section (); \
|
||
}
|
||
|
||
/* Output at end of assembler file.
|
||
|
||
On the RS/6000, referencing data should automatically pull in text. */
|
||
|
||
#define ASM_FILE_END(FILE) \
|
||
{ \
|
||
text_section (); \
|
||
fprintf (FILE, "_section_.text:\n"); \
|
||
data_section (); \
|
||
fprintf (FILE, "\t.long _section_.text\n"); \
|
||
}
|
||
|
||
/* We define this to prevent the name mangler from putting dollar signs into
|
||
function names. */
|
||
|
||
#define NO_DOLLAR_IN_LABEL
|
||
|
||
/* We define this to 0 so that gcc will never accept a dollar sign in a
|
||
variable name. This is needed because the AIX assembler will not accept
|
||
dollar signs. */
|
||
|
||
#define DOLLARS_IN_IDENTIFIERS 0
|
||
|
||
/* Implicit library calls should use memcpy, not bcopy, etc. */
|
||
|
||
#define TARGET_MEM_FUNCTIONS
|
||
|
||
/* Define the extra sections we need. We define three: one is the read-only
|
||
data section which is used for constants. This is a csect whose name is
|
||
derived from the name of the input file. The second is for initialized
|
||
global variables. This is a csect whose name is that of the variable.
|
||
The third is the TOC. */
|
||
|
||
#define EXTRA_SECTIONS \
|
||
read_only_data, private_data, read_only_private_data, toc, bss
|
||
|
||
/* Define the name of our readonly data section. */
|
||
|
||
#define READONLY_DATA_SECTION read_only_data_section
|
||
|
||
/* Indicate that jump tables go in the text section. */
|
||
|
||
#define JUMP_TABLES_IN_TEXT_SECTION
|
||
|
||
/* Define the routines to implement these extra sections. */
|
||
|
||
#define EXTRA_SECTION_FUNCTIONS \
|
||
\
|
||
void \
|
||
read_only_data_section () \
|
||
{ \
|
||
if (in_section != read_only_data) \
|
||
{ \
|
||
fprintf (asm_out_file, "\t.csect %s[RO]\n", \
|
||
xcoff_read_only_section_name); \
|
||
in_section = read_only_data; \
|
||
} \
|
||
} \
|
||
\
|
||
void \
|
||
private_data_section () \
|
||
{ \
|
||
if (in_section != private_data) \
|
||
{ \
|
||
fprintf (asm_out_file, "\t.csect %s[RW]\n", \
|
||
xcoff_private_data_section_name); \
|
||
\
|
||
in_section = private_data; \
|
||
} \
|
||
} \
|
||
\
|
||
void \
|
||
read_only_private_data_section () \
|
||
{ \
|
||
if (in_section != read_only_private_data) \
|
||
{ \
|
||
fprintf (asm_out_file, "\t.csect %s[RO]\n", \
|
||
xcoff_private_data_section_name); \
|
||
in_section = read_only_private_data; \
|
||
} \
|
||
} \
|
||
\
|
||
void \
|
||
toc_section () \
|
||
{ \
|
||
if (in_section != toc) \
|
||
fprintf (asm_out_file, "\t.toc\n"); \
|
||
\
|
||
in_section = toc; \
|
||
}
|
||
|
||
/* This macro produces the initial definition of a function name.
|
||
On the RS/6000, we need to place an extra '.' in the function name and
|
||
output the function descriptor.
|
||
|
||
The csect for the function will have already been created by the
|
||
`text_section' call previously done. We do have to go back to that
|
||
csect, however. */
|
||
|
||
/* ??? What do the 16 and 044 in the .function line really mean? */
|
||
|
||
#define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL) \
|
||
{ if (TREE_PUBLIC (DECL)) \
|
||
{ \
|
||
fprintf (FILE, "\t.globl ."); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, "\n"); \
|
||
} \
|
||
else if (write_symbols == XCOFF_DEBUG) \
|
||
{ \
|
||
fprintf (FILE, "\t.lglobl ."); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, "\n"); \
|
||
} \
|
||
fprintf (FILE, "\t.csect "); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, "[DS]\n"); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, ":\n"); \
|
||
fprintf (FILE, "\t.long ."); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, ", TOC[tc0], 0\n"); \
|
||
fprintf (FILE, "\t.csect [PR]\n."); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, ":\n"); \
|
||
if (write_symbols == XCOFF_DEBUG) \
|
||
{ \
|
||
dbxout_symbol (DECL, 0); \
|
||
fprintf (FILE, "\t.function ."); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, ",."); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, ",16,044,L..end_"); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, "-."); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); \
|
||
fprintf (FILE, "\n"); \
|
||
} \
|
||
}
|
||
|
||
/* Return non-zero if this entry is to be written into the constant pool
|
||
in a special way. We do so if this is a SYMBOL_REF, LABEL_REF or a CONST
|
||
containing one of them. If -mfp-in-toc (the default), we also do
|
||
this for floating-point constants. We actually can only do this
|
||
if the FP formats of the target and host machines are the same, but
|
||
we can't check that since not every file that uses
|
||
GO_IF_LEGITIMATE_ADDRESS_P includes real.h. */
|
||
|
||
#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X) \
|
||
(GET_CODE (X) == SYMBOL_REF \
|
||
|| (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
|
||
&& GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \
|
||
|| GET_CODE (X) == LABEL_REF \
|
||
|| (TARGET_FP_IN_TOC && GET_CODE (X) == CONST_DOUBLE \
|
||
&& GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
|
||
&& BITS_PER_WORD == HOST_BITS_PER_INT))
|
||
|
||
/* Select section for constant in constant pool.
|
||
|
||
On RS/6000, all constants are in the private read-only data area.
|
||
However, if this is being placed in the TOC it must be output as a
|
||
toc entry. */
|
||
|
||
#define SELECT_RTX_SECTION(MODE, X) \
|
||
{ if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
|
||
toc_section (); \
|
||
else \
|
||
read_only_private_data_section (); \
|
||
}
|
||
|
||
/* Macro to output a special constant pool entry. Go to WIN if we output
|
||
it. Otherwise, it is written the usual way.
|
||
|
||
On the RS/6000, toc entries are handled this way. */
|
||
|
||
#define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, WIN) \
|
||
{ if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
|
||
{ \
|
||
output_toc (FILE, X, LABELNO); \
|
||
goto WIN; \
|
||
} \
|
||
}
|
||
|
||
/* Select the section for an initialized data object.
|
||
|
||
On the RS/6000, we have a special section for all variables except those
|
||
that are static. */
|
||
|
||
#define SELECT_SECTION(EXP,RELOC) \
|
||
{ \
|
||
if ((TREE_READONLY (EXP) \
|
||
|| (TREE_CODE (EXP) == STRING_CST \
|
||
&& !flag_writable_strings)) \
|
||
&& ! TREE_THIS_VOLATILE (EXP) \
|
||
&& ! (RELOC)) \
|
||
{ \
|
||
if (TREE_PUBLIC (EXP)) \
|
||
read_only_data_section (); \
|
||
else \
|
||
read_only_private_data_section (); \
|
||
} \
|
||
else \
|
||
{ \
|
||
if (TREE_PUBLIC (EXP)) \
|
||
data_section (); \
|
||
else \
|
||
private_data_section (); \
|
||
} \
|
||
}
|
||
|
||
/* This outputs NAME to FILE up to the first null or '['. */
|
||
|
||
#define RS6000_OUTPUT_BASENAME(FILE, NAME) \
|
||
if ((NAME)[0] == '*') \
|
||
assemble_name (FILE, NAME); \
|
||
else \
|
||
{ \
|
||
char *_p; \
|
||
for (_p = (NAME); *_p && *_p != '['; _p++) \
|
||
fputc (*_p, FILE); \
|
||
}
|
||
|
||
/* Output something to declare an external symbol to the assembler. Most
|
||
assemblers don't need this.
|
||
|
||
If we haven't already, add "[RW]" (or "[DS]" for a function) to the
|
||
name. Normally we write this out along with the name. In the few cases
|
||
where we can't, it gets stripped off. */
|
||
|
||
#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
|
||
{ rtx _symref = XEXP (DECL_RTL (DECL), 0); \
|
||
if ((TREE_CODE (DECL) == VAR_DECL \
|
||
|| TREE_CODE (DECL) == FUNCTION_DECL) \
|
||
&& (NAME)[0] != '*' \
|
||
&& (NAME)[strlen (NAME) - 1] != ']') \
|
||
{ \
|
||
char *_name = (char *) permalloc (strlen (XSTR (_symref, 0)) + 5); \
|
||
strcpy (_name, XSTR (_symref, 0)); \
|
||
strcat (_name, TREE_CODE (DECL) == FUNCTION_DECL ? "[DS]" : "[RW]"); \
|
||
XSTR (_symref, 0) = _name; \
|
||
} \
|
||
fprintf (FILE, "\t.extern "); \
|
||
assemble_name (FILE, XSTR (_symref, 0)); \
|
||
if (TREE_CODE (DECL) == FUNCTION_DECL) \
|
||
{ \
|
||
fprintf (FILE, "\n\t.extern ."); \
|
||
RS6000_OUTPUT_BASENAME (FILE, XSTR (_symref, 0)); \
|
||
} \
|
||
fprintf (FILE, "\n"); \
|
||
}
|
||
|
||
/* Similar, but for libcall. We only have to worry about the function name,
|
||
not that of the descriptor. */
|
||
|
||
#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
|
||
{ fprintf (FILE, "\t.extern ."); \
|
||
assemble_name (FILE, XSTR (FUN, 0)); \
|
||
fprintf (FILE, "\n"); \
|
||
}
|
||
|
||
/* Output to assembler file text saying following lines
|
||
may contain character constants, extra white space, comments, etc. */
|
||
|
||
#define ASM_APP_ON ""
|
||
|
||
/* Output to assembler file text saying following lines
|
||
no longer contain unusual constructs. */
|
||
|
||
#define ASM_APP_OFF ""
|
||
|
||
/* Output before instructions. */
|
||
|
||
#define TEXT_SECTION_ASM_OP ".csect [PR]"
|
||
|
||
/* Output before writable data. */
|
||
|
||
#define DATA_SECTION_ASM_OP ".csect .data[RW]"
|
||
|
||
/* How to refer to registers in assembler output.
|
||
This sequence is indexed by compiler's hard-register-number (see above). */
|
||
|
||
#define REGISTER_NAMES \
|
||
{"0", "1", "2", "3", "4", "5", "6", "7", \
|
||
"8", "9", "10", "11", "12", "13", "14", "15", \
|
||
"16", "17", "18", "19", "20", "21", "22", "23", \
|
||
"24", "25", "26", "27", "28", "29", "30", "31", \
|
||
"0", "1", "2", "3", "4", "5", "6", "7", \
|
||
"8", "9", "10", "11", "12", "13", "14", "15", \
|
||
"16", "17", "18", "19", "20", "21", "22", "23", \
|
||
"24", "25", "26", "27", "28", "29", "30", "31", \
|
||
"mq", "lr", "ctr", "ap", \
|
||
"0", "1", "2", "3", "4", "5", "6", "7" }
|
||
|
||
/* Table of additional register names to use in user input. */
|
||
|
||
#define ADDITIONAL_REGISTER_NAMES \
|
||
{"r0", 0, "r1", 1, "r2", 2, "r3", 3, \
|
||
"r4", 4, "r5", 5, "r6", 6, "r7", 7, \
|
||
"r8", 8, "r9", 9, "r10", 10, "r11", 11, \
|
||
"r12", 12, "r13", 13, "r14", 14, "r15", 15, \
|
||
"r16", 16, "r17", 17, "r18", 18, "r19", 19, \
|
||
"r20", 20, "r21", 21, "r22", 22, "r23", 23, \
|
||
"r24", 24, "r25", 25, "r26", 26, "r27", 27, \
|
||
"r28", 28, "r29", 29, "r30", 30, "r31", 31, \
|
||
"fr0", 32, "fr1", 33, "fr2", 34, "fr3", 35, \
|
||
"fr4", 36, "fr5", 37, "fr6", 38, "fr7", 39, \
|
||
"fr8", 40, "fr9", 41, "fr10", 42, "fr11", 43, \
|
||
"fr12", 44, "fr13", 45, "fr14", 46, "fr15", 47, \
|
||
"fr16", 48, "fr17", 49, "fr18", 50, "fr19", 51, \
|
||
"fr20", 52, "fr21", 53, "fr22", 54, "fr23", 55, \
|
||
"fr24", 56, "fr25", 57, "fr26", 58, "fr27", 59, \
|
||
"fr28", 60, "fr29", 61, "fr30", 62, "fr31", 63, \
|
||
/* no additional names for: mq, lr, ctr, ap */ \
|
||
"cr0", 68, "cr1", 69, "cr2", 70, "cr3", 71, \
|
||
"cr4", 72, "cr5", 73, "cr6", 74, "cr7", 75, \
|
||
"cc", 68 }
|
||
|
||
/* How to renumber registers for dbx and gdb. */
|
||
|
||
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
|
||
|
||
/* This is how to output the definition of a user-level label named NAME,
|
||
such as the label on a static function or variable NAME. */
|
||
|
||
#define ASM_OUTPUT_LABEL(FILE,NAME) \
|
||
do { RS6000_OUTPUT_BASENAME (FILE, NAME); fputs (":\n", FILE); } while (0)
|
||
|
||
/* This is how to output a command to make the user-level label named NAME
|
||
defined for reference from other files. */
|
||
|
||
#define ASM_GLOBALIZE_LABEL(FILE,NAME) \
|
||
do { fputs ("\t.globl ", FILE); \
|
||
RS6000_OUTPUT_BASENAME (FILE, NAME); fputs ("\n", FILE);} while (0)
|
||
|
||
/* This is how to output a reference to a user-level label named NAME.
|
||
`assemble_name' uses this. */
|
||
|
||
#define ASM_OUTPUT_LABELREF(FILE,NAME) \
|
||
fprintf (FILE, NAME)
|
||
|
||
/* This is how to output an internal numbered label where
|
||
PREFIX is the class of label and NUM is the number within the class. */
|
||
|
||
#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
|
||
fprintf (FILE, "%s..%d:\n", PREFIX, NUM)
|
||
|
||
/* This is how to output a label for a jump table. Arguments are the same as
|
||
for ASM_OUTPUT_INTERNAL_LABEL, except the insn for the jump table is
|
||
passed. */
|
||
|
||
#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \
|
||
{ ASM_OUTPUT_ALIGN (FILE, 2); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); }
|
||
|
||
/* This is how to store into the string LABEL
|
||
the symbol_ref name of an internal numbered label where
|
||
PREFIX is the class of label and NUM is the number within the class.
|
||
This is suitable for output with `assemble_name'. */
|
||
|
||
#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
|
||
sprintf (LABEL, "%s..%d", PREFIX, NUM)
|
||
|
||
/* This is how to output an assembler line defining a `double' constant. */
|
||
|
||
#define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
|
||
fprintf (FILE, "\t.double 0d%.20e\n", (VALUE))
|
||
|
||
/* This is how to output an assembler line defining a `float' constant. */
|
||
|
||
#define ASM_OUTPUT_FLOAT(FILE,VALUE) \
|
||
fprintf (FILE, "\t.float 0d%.20e\n", (VALUE))
|
||
|
||
/* This is how to output an assembler line defining an `int' constant. */
|
||
|
||
#define ASM_OUTPUT_INT(FILE,VALUE) \
|
||
( fprintf (FILE, "\t.long "), \
|
||
output_addr_const (FILE, (VALUE)), \
|
||
fprintf (FILE, "\n"))
|
||
|
||
/* Likewise for `char' and `short' constants. */
|
||
|
||
#define ASM_OUTPUT_SHORT(FILE,VALUE) \
|
||
( fprintf (FILE, "\t.short "), \
|
||
output_addr_const (FILE, (VALUE)), \
|
||
fprintf (FILE, "\n"))
|
||
|
||
#define ASM_OUTPUT_CHAR(FILE,VALUE) \
|
||
( fprintf (FILE, "\t.byte "), \
|
||
output_addr_const (FILE, (VALUE)), \
|
||
fprintf (FILE, "\n"))
|
||
|
||
/* This is how to output an assembler line for a numeric constant byte. */
|
||
|
||
#define ASM_OUTPUT_BYTE(FILE,VALUE) \
|
||
fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
|
||
|
||
/* This is how to output an assembler line to define N characters starting
|
||
at P to FILE. */
|
||
|
||
#define ASM_OUTPUT_ASCII(FILE, P, N) output_ascii ((FILE), (P), (N))
|
||
|
||
/* This is how to output code to push a register on the stack.
|
||
It need not be very fast code. */
|
||
|
||
#define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
|
||
fprintf (FILE, "\tstu %s,-4(r1)\n", reg_names[REGNO]);
|
||
|
||
/* This is how to output an insn to pop a register from the stack.
|
||
It need not be very fast code. */
|
||
|
||
#define ASM_OUTPUT_REG_POP(FILE,REGNO) \
|
||
fprintf (FILE, "\tl %s,0(r1)\n\tai r1,r1,4\n", reg_names[REGNO])
|
||
|
||
/* This is how to output an element of a case-vector that is absolute.
|
||
(RS/6000 does not use such vectors, but we must define this macro
|
||
anyway.) */
|
||
|
||
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
|
||
fprintf (FILE, "\t.long L..%d\n", VALUE)
|
||
|
||
/* This is how to output an element of a case-vector that is relative. */
|
||
|
||
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
|
||
fprintf (FILE, "\t.long L..%d-L..%d\n", VALUE, REL)
|
||
|
||
/* This is how to output an assembler line
|
||
that says to advance the location counter
|
||
to a multiple of 2**LOG bytes. */
|
||
|
||
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
|
||
if ((LOG) != 0) \
|
||
fprintf (FILE, "\t.align %d\n", (LOG))
|
||
|
||
#define ASM_OUTPUT_SKIP(FILE,SIZE) \
|
||
fprintf (FILE, "\t.space %d\n", (SIZE))
|
||
|
||
/* This says how to output an assembler line
|
||
to define a global common symbol. */
|
||
|
||
#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
|
||
do { fputs (".comm ", (FILE)); \
|
||
RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
|
||
fprintf ((FILE), ",%d\n", (SIZE)); } while (0)
|
||
|
||
/* This says how to output an assembler line
|
||
to define a local common symbol. */
|
||
|
||
#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \
|
||
do { fputs (".lcomm ", (FILE)); \
|
||
RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
|
||
fprintf ((FILE), ",%d,%s\n", (SIZE), xcoff_bss_section_name); \
|
||
} while (0)
|
||
|
||
/* Store in OUTPUT a string (made with alloca) containing
|
||
an assembler-name for a local static variable named NAME.
|
||
LABELNO is an integer which is different for each call. */
|
||
|
||
#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
|
||
( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
|
||
sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
|
||
|
||
/* Define the parentheses used to group arithmetic operations
|
||
in assembler code. */
|
||
|
||
#define ASM_OPEN_PAREN "("
|
||
#define ASM_CLOSE_PAREN ")"
|
||
|
||
/* Define results of standard character escape sequences. */
|
||
#define TARGET_BELL 007
|
||
#define TARGET_BS 010
|
||
#define TARGET_TAB 011
|
||
#define TARGET_NEWLINE 012
|
||
#define TARGET_VT 013
|
||
#define TARGET_FF 014
|
||
#define TARGET_CR 015
|
||
|
||
/* Print operand X (an rtx) in assembler syntax to file FILE.
|
||
CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
|
||
For `%' followed by punctuation, CODE is the punctuation and X is null. */
|
||
|
||
#define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
|
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/* Define which CODE values are valid. */
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#define PRINT_OPERAND_PUNCT_VALID_P(CODE) 0
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/* Print a memory address as an operand to reference that memory location. */
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#define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
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/* Define the codes that are matched by predicates in rs6000.c. */
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#define PREDICATE_CODES \
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{"short_cint_operand", {CONST_INT}}, \
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{"u_short_cint_operand", {CONST_INT}}, \
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{"non_short_cint_operand", {CONST_INT}}, \
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{"gen_reg_operand", {SUBREG, REG}}, \
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{"cc_reg_operand", {SUBREG, REG}}, \
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{"reg_or_short_operand", {SUBREG, REG, CONST_INT}}, \
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{"reg_or_neg_short_operand", {SUBREG, REG, CONST_INT}}, \
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{"reg_or_u_short_operand", {SUBREG, REG, CONST_INT}}, \
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{"reg_or_cint_operand", {SUBREG, REG, CONST_INT}}, \
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{"easy_fp_constant", {CONST_DOUBLE}}, \
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{"reg_or_mem_operand", {SUBREG, MEM, REG}}, \
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{"fp_reg_or_mem_operand", {SUBREG, MEM, REG}}, \
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{"mem_or_easy_const_operand", {SUBREG, MEM, CONST_DOUBLE}}, \
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{"add_operand", {SUBREG, REG, CONST_INT}}, \
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{"non_add_cint_operand", {CONST_INT}}, \
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{"and_operand", {SUBREG, REG, CONST_INT}}, \
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{"non_and_cint_operand", {CONST_INT}}, \
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{"logical_operand", {SUBREG, REG, CONST_INT}}, \
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{"non_logical_cint_operand", {CONST_INT}}, \
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{"mask_operand", {CONST_INT}}, \
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{"call_operand", {SYMBOL_REF, REG}}, \
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{"input_operand", {SUBREG, MEM, REG, CONST_INT}}, \
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{"branch_comparison_operation", {EQ, NE, LE, LT, GE, \
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LT, LEU, LTU, GEU, GTU}}, \
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{"scc_comparison_operation", {EQ, NE, LE, LT, GE, \
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LT, LEU, LTU, GEU, GTU}},
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