https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93709
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |marxin at gcc dot gnu.org
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
commit r10-7114-g37e0df8a9be5a8232f4ccb73cdadb02121ba523f
Author: Jiufu Guo <[email protected]>
Date: Tue Mar 10 13:51:57 2020 +0800
rs6000: Check -+0 and NaN for smax/smin generation
PR93709 mentioned regressions on maxlocval_4.f90 and minlocval_f.f90 which
relates to max of '-inf' and 'nan'. This regression occur on P9 because
P9 new instruction 'xsmaxcdp' is generated.
And for C code `a < b ? b : a` is also generated as `xsmaxcdp` under -O2
for P9. While this instruction behavior more like C/C++ semantic (a>b?a:b).
This generates prevents 'xsmaxcdp' to be generated for those cases.
'xsmincdp' also is handled in patch.
gcc/
2020-03-10 Jiufu Guo <[email protected]>
PR target/93709
* gcc/config/rs6000/rs6000.c (rs6000_emit_p9_fp_minmax): Check
NAN and SIGNED_ZEROR for smax/smin.
gcc/testsuite
2020-03-10 Jiufu Guo <[email protected]>
PR target/93709
* gcc.target/powerpc/p9-minmax-3.c: New test.
