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target-ppc: optimize fabs, fnabs, fneg

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fabs, fnabs and fneg are just flipping the bit sign of an FP register,
this can be implemented in TCG instead of using softfloat.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aurelien Jarno 2013-04-20 08:56:13 +00:00 • committed by Alexander Graf
parent 414f5d1448
commit bf45a2e67c
3 changed files with 34 additions and 40 deletions
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31
target-ppc/fpu_helper.c
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@ -596,37 +596,6 @@ uint64_t helper_fdiv(CPUPPCState *env, uint64_t arg1, uint64_t arg2)
return farg1.ll;
}
/* fabs */
uint64_t helper_fabs(CPUPPCState *env, uint64_t arg)
{
CPU_DoubleU farg;
farg.ll = arg;
farg.d = float64_abs(farg.d);
return farg.ll;
}
/* fnabs */
uint64_t helper_fnabs(CPUPPCState *env, uint64_t arg)
{
CPU_DoubleU farg;
farg.ll = arg;
farg.d = float64_abs(farg.d);
farg.d = float64_chs(farg.d);
return farg.ll;
}
/* fneg */
uint64_t helper_fneg(CPUPPCState *env, uint64_t arg)
{
CPU_DoubleU farg;
farg.ll = arg;
farg.d = float64_chs(farg.d);
return farg.ll;
}
/* fctiw - fctiw. */
uint64_t helper_fctiw(CPUPPCState *env, uint64_t arg)
{