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| author | H.J. Lu <hjl.tools@gmail.com> | 2016-03-28 13:13:36 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2016-03-28 13:13:51 -0700 |
| commit | c365e615f7429aee302f8af7bf07ae262278febb (patch) | |
| tree | 871a829257ab6f5ba2584e4d9be93cbf97f56991 /sysdeps/x86_64/multiarch/memcpy-ssse3.S | |
| parent | e41b395523040fcb58c7d378475720c2836d280c (diff) | |
| download | glibc-c365e615f7429aee302f8af7bf07ae262278febb.tar.gz glibc-c365e615f7429aee302f8af7bf07ae262278febb.tar.xz glibc-c365e615f7429aee302f8af7bf07ae262278febb.zip | |
Implement x86-64 multiarch mempcpy in memcpy
Implement x86-64 multiarch mempcpy in memcpy to share most of code. It reduces code size of libc.so. [BZ #18858] * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Remove mempcpy-ssse3, mempcpy-ssse3-back, mempcpy-avx-unaligned and mempcpy-avx512-no-vzeroupper. * sysdeps/x86_64/multiarch/memcpy-avx-unaligned.S (MEMPCPY_CHK): New. (MEMPCPY): Likewise. * sysdeps/x86_64/multiarch/memcpy-avx512-no-vzeroupper.S (MEMPCPY_CHK): New. (MEMPCPY): Likewise. * sysdeps/x86_64/multiarch/memcpy-ssse3-back.S (MEMPCPY_CHK): New. (MEMPCPY): Likewise. * sysdeps/x86_64/multiarch/memcpy-ssse3.S (MEMPCPY_CHK): New. (MEMPCPY): Likewise. * sysdeps/x86_64/multiarch/mempcpy-avx-unaligned.S: Removed. * sysdeps/x86_64/multiarch/mempcpy-avx512-no-vzeroupper.S: Likewise. * sysdeps/x86_64/multiarch/mempcpy-ssse3-back.S: Likewise. * sysdeps/x86_64/multiarch/mempcpy-ssse3.S: Likewise.
Diffstat (limited to 'sysdeps/x86_64/multiarch/memcpy-ssse3.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/memcpy-ssse3.S | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/memcpy-ssse3.S b/sysdeps/x86_64/multiarch/memcpy-ssse3.S index 95de9695f9..1ca88c0758 100644 --- a/sysdeps/x86_64/multiarch/memcpy-ssse3.S +++ b/sysdeps/x86_64/multiarch/memcpy-ssse3.S @@ -29,6 +29,8 @@ #ifndef MEMCPY # define MEMCPY __memcpy_ssse3 # define MEMCPY_CHK __memcpy_chk_ssse3 +# define MEMPCPY __mempcpy_ssse3 +# define MEMPCPY_CHK __mempcpy_chk_ssse3 #endif #define JMPTBL(I, B) I - B @@ -44,6 +46,19 @@ ud2 .section .text.ssse3,"ax",@progbits +#if !defined USE_AS_MEMPCPY && !defined USE_AS_MEMMOVE +ENTRY (MEMPCPY_CHK) + cmpq %rdx, %rcx + jb HIDDEN_JUMPTARGET (__chk_fail) +END (MEMPCPY_CHK) + +ENTRY (MEMPCPY) + movq %rdi, %rax + addq %rdx, %rax + jmp L(start) +END (MEMPCPY) +#endif + #if !defined USE_AS_BCOPY ENTRY (MEMCPY_CHK) cmpq %rdx, %rcx @@ -66,6 +81,7 @@ ENTRY (MEMCPY) jmp L(copy_backward) L(copy_forward): #endif +L(start): cmp $79, %rdx lea L(table_less_80bytes)(%rip), %r11 ja L(80bytesormore) |