Quoting Uros Bizjak <[EMAIL PROTECTED]>: > Following simple patch should implement your suggested approach: > > -march=prescott enables fisttp > -msse3 enables fisttp > -march=prescott -mno-sse3 enables fisttp > > Otherwise fisttp is disabled.
This one also works for -mno-80387 and simplifies insn pattern constraints a
bit:
2005-10-05 Uros Bizjak <[EMAIL PROTECTED]>
* config/i386/i386.h (TARGET_FISTTP): Enable also for
TARGET_SSE3 and only for TARGET_80387.
* config/i386/i386.md (fix_trunc<mode>_fisttp_i387_1,
(fix_trunc<mode>_i387_fisttp, fix_trunc<mode>_i387_fisttp_with_temp):
Do not depend on TARGET_80387.
Uros.
fisttp_2.diff
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