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| author | H.J. Lu <hjl.tools@gmail.com> | 2022-04-22 10:53:13 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2022-04-22 11:23:15 -0700 |
| commit | 8ea20ee5f6145de4bff9481d3e09ac36ba9df8f3 (patch) | |
| tree | 0b55037af7f84a79e8849190c50acd0921e1f9f5 | |
| parent | 198abcbb94618730dae1b3f4393efaa49e0ec8c7 (diff) | |
| download | glibc-8ea20ee5f6145de4bff9481d3e09ac36ba9df8f3.tar.gz | |
x86-64: Fix SSE2 memcmp and SSSE3 memmove for x32
Clear the upper 32 bits in RDX (memory size) for x32 to fix
FAIL: string/tst-size_t-memcmp
FAIL: string/tst-size_t-memcmp-2
FAIL: string/tst-size_t-memcpy
FAIL: wcsmbs/tst-size_t-wmemcmp
on x32 introduced by
8804157ad9 x86: Optimize memcmp SSE2 in memcmp.S
26b2478322 x86: Reduce code size of mem{move|pcpy|cpy}-ssse3
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
| -rw-r--r-- | sysdeps/x86_64/memcmp.S | 4 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/memmove-ssse3.S | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/x86_64/memcmp.S b/sysdeps/x86_64/memcmp.S index b153694048..5718a7da86 100644 --- a/sysdeps/x86_64/memcmp.S +++ b/sysdeps/x86_64/memcmp.S @@ -46,6 +46,10 @@ .text ENTRY(MEMCMP) +# ifdef __ILP32__ + /* Clear the upper 32 bits. */ + movl %edx, %edx +# endif #ifdef USE_AS_WMEMCMP /* Use 0xffff to test for mismatches on pmovmskb bitmask. Store in ecx for code size. This is preferable to using `incw` as diff --git a/sysdeps/x86_64/multiarch/memmove-ssse3.S b/sysdeps/x86_64/multiarch/memmove-ssse3.S index 215583e7bd..310ff62b86 100644 --- a/sysdeps/x86_64/multiarch/memmove-ssse3.S +++ b/sysdeps/x86_64/multiarch/memmove-ssse3.S @@ -27,6 +27,10 @@ ENTRY(MEMMOVE_CHK) END(MEMMOVE_CHK) ENTRY_P2ALIGN(MEMMOVE, 6) +# ifdef __ILP32__ + /* Clear the upper 32 bits. */ + movl %edx, %edx +# endif movq %rdi, %rax L(start): cmpq $16, %rdx |