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(CASE_VALUES_THRESHOLD): Define.

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From-SVN: r1282
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Tom Wood 1992-06-25 10:31:01 +00:00
parent e5671f2b6e
commit cc61d0dec4
1 changed files with 9 additions and 0 deletions
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gcc/config/m88k/m88k.h
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@ -1404,6 +1404,15 @@ enum reg_class { NO_REGS, AP_REG, XRF_REGS, GENERAL_REGS, AGRF_REGS,
actually ignored by the `case' insn proper. */
/* #define CASE_DROPS_THROUGH */
/* Define this to be the smallest number of different values for which it
is best to use a jump-table instead of a tree of conditional branches.
The default is 4 for machines with a casesi instruction and 5 otherwise.
The best 88110 number is around 7, though the exact number isn't yet
known. A third alternative for the 88110 is to use a binary tree of
bb1 instructions on bits 2/1/0 if the range is dense. This may not
win very much though. */
#define CASE_VALUES_THRESHOLD (TARGET_88100 ? 4 : 7)
/* Specify the tree operation to be used to convert reals to integers. */
#define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR