88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* Configuration for an i386 running Mach as the target machine. */
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/* We do want to add an underscore to the front of each user symbol.
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i386gas.h checks this. */
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#define YES_UNDERSCORES
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#include "i386gas.h"
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#undef CPP_PREDEFINES
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#define CPP_PREDEFINES "-Dunix -Di386 -DMACH"
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/* Specify extra dir to search for include files. */
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#define SYSTEM_INCLUDE_DIR "/usr/mach/include"
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/* Make stddef.h agree with types.h. */
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#define SIZE_TYPE "long int"
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/* Defines to be able to build libgcc.a with GCC. */
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/* It might seem that these are not important, since gcc 2 will never
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call libgcc for these functions. But programs might be linked with
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code compiled by gcc 1, and then these will be used. */
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#define perform_udivsi3(a,b) \
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{ \
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register int dx asm("dx"); \
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register int ax asm("ax"); \
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\
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dx = 0; \
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ax = a; \
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asm ("divl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (b), "d" (dx)); \
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return ax; \
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}
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#define perform_divsi3(a,b) \
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{ \
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register int dx asm("dx"); \
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register int ax asm("ax"); \
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\
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ax = a; \
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asm ("cltd\n\tidivl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (b)); \
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return ax; \
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}
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#define perform_umodsi3(a,b) \
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{ \
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register int dx asm("dx"); \
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register int ax asm("ax"); \
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\
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dx = 0; \
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ax = a; \
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asm ("divl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (b), "d" (dx)); \
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return dx; \
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}
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#define perform_modsi3(a,b) \
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{ \
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register int dx asm("dx"); \
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register int ax asm("ax"); \
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\
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ax = a; \
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asm ("cltd\n\tidivl %3" : "=a" (ax), "=d" (dx) : "a" (ax), "g" (b)); \
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return dx; \
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}
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#define perform_fixdfsi(a) \
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{ \
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auto unsigned short ostatus; \
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auto unsigned short nstatus; \
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auto int ret; \
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auto double tmp; \
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\
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&ostatus; /* guarantee these land in memory */ \
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&nstatus; \
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&ret; \
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&tmp; \
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\
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asm volatile ("fnstcw %0" : "=m" (ostatus)); \
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nstatus = ostatus | 0x0c00; \
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asm volatile ("fldcw %0" : /* no outputs */ : "m" (nstatus)); \
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tmp = a; \
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asm volatile ("fldl %0" : /* no outputs */ : "m" (tmp)); \
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asm volatile ("fistpl %0" : "=m" (ret)); \
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asm volatile ("fldcw %0" : /* no outputs */ : "m" (ostatus)); \
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\
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return ret; \
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}
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