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| author | Richard Henderson <richard.henderson@linaro.org> | 2023-01-10 18:01:01 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-02-06 16:19:35 -0300 |
| commit | be836d9153eb6c1203c6659befb38427514eb349 (patch) | |
| tree | ec19a5567ac1c36199691f13ca654bd940921500 /sysdeps/generic/libm-alias-double.h | |
| parent | 167f6230af97690985ccbc9b3026a7c32ec2d6e9 (diff) | |
| download | glibc-be836d9153eb6c1203c6659befb38427514eb349.tar.gz glibc-be836d9153eb6c1203c6659befb38427514eb349.tar.xz glibc-be836d9153eb6c1203c6659befb38427514eb349.zip | |
hppa: Add memcopy.h
GCC's combine pass cannot merge (x >> c | y << (32 - c)) into a double-word shift unless (1) the subtract is in the same basic block and (2) the result of the subtract is used exactly once. Neither condition is true for any use of MERGE. By forcing the use of a double-word shift, we not only reduce contention on SAR, but also allow the setting of SAR to be hoisted outside of a loop. Checked on hppa-linux-gnu. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/generic/libm-alias-double.h')
0 files changed, 0 insertions, 0 deletions