diff options
| author |   tedu <tedu@openbsd.org> | 2014-11-29 18:51:23 +0000 |
|---|---|---|
| committer | tedu <tedu@openbsd.org> | 2014-11-29 18:51:23 +0000 |
| commit | 737e061132473fb2b37fc15648b2a2378e910cae (patch) | |
| tree | 0f60e22e8c133876ab658db83b19114dbef7cc43 /sys/lib/libkern/arch/amd64 | |
| parent | restore the "hot" memcpy that existed before recent conversion flipflop (diff) | |
| download | wireguard-openbsd-737e061132473fb2b37fc15648b2a2378e910cae.tar.xz wireguard-openbsd-737e061132473fb2b37fc15648b2a2378e910cae.zip | |
it should not be necessary to clear the direction flag
ok deraadt
Diffstat (limited to 'sys/lib/libkern/arch/amd64')
| -rw-r--r-- | sys/lib/libkern/arch/amd64/bcmp.S | 1 | ||||
| -rw-r--r-- | sys/lib/libkern/arch/amd64/bzero.S | 1 | ||||
| -rw-r--r-- | sys/lib/libkern/arch/amd64/memchr.S | 1 | ||||
| -rw-r--r-- | sys/lib/libkern/arch/amd64/memcmp.S | 1 | ||||
| -rw-r--r-- | sys/lib/libkern/arch/amd64/memmove.S | 1 | ||||
| -rw-r--r-- | sys/lib/libkern/arch/amd64/memset.S | 2 | ||||
| -rw-r--r-- | sys/lib/libkern/arch/amd64/scanc.S | 1 | ||||
| -rw-r--r-- | sys/lib/libkern/arch/amd64/skpc.S | 1 |
8 files changed, 0 insertions, 9 deletions
diff --git a/sys/lib/libkern/arch/amd64/bcmp.S b/sys/lib/libkern/arch/amd64/bcmp.S index 3c96a90b340..4cb1b3d6894 100644 --- a/sys/lib/libkern/arch/amd64/bcmp.S +++ b/sys/lib/libkern/arch/amd64/bcmp.S @@ -2,7 +2,6 @@ ENTRY(bcmp) xorl %eax,%eax /* clear return value */ - cld /* set compare direction forward */ movq %rdx,%rcx /* compare by words */ shrq $3,%rcx diff --git a/sys/lib/libkern/arch/amd64/bzero.S b/sys/lib/libkern/arch/amd64/bzero.S index 76adafc20ab..354e2066ed3 100644 --- a/sys/lib/libkern/arch/amd64/bzero.S +++ b/sys/lib/libkern/arch/amd64/bzero.S @@ -9,7 +9,6 @@ ENTRY(bzero) movq %rsi,%rdx - cld /* set fill direction forward */ xorq %rax,%rax /* set fill data to 0 */ /* diff --git a/sys/lib/libkern/arch/amd64/memchr.S b/sys/lib/libkern/arch/amd64/memchr.S index 88fa37462d2..1738e17f8ee 100644 --- a/sys/lib/libkern/arch/amd64/memchr.S +++ b/sys/lib/libkern/arch/amd64/memchr.S @@ -11,7 +11,6 @@ ENTRY(memchr) movq %rdx,%rcx /* set length of search */ testq %rcx,%rcx /* test for len == 0 */ jz L1 - cld /* set search forward */ repne /* search! */ scasb jne L1 /* scan failed, return null */ diff --git a/sys/lib/libkern/arch/amd64/memcmp.S b/sys/lib/libkern/arch/amd64/memcmp.S index d32c66d5b93..0d97f6a9bd2 100644 --- a/sys/lib/libkern/arch/amd64/memcmp.S +++ b/sys/lib/libkern/arch/amd64/memcmp.S @@ -7,7 +7,6 @@ #include <machine/asm.h> ENTRY(memcmp) - cld /* set compare direction forward */ movq %rdx,%rcx /* compare by longs */ shrq $3,%rcx repe diff --git a/sys/lib/libkern/arch/amd64/memmove.S b/sys/lib/libkern/arch/amd64/memmove.S index 1516c743660..351e4d53a49 100644 --- a/sys/lib/libkern/arch/amd64/memmove.S +++ b/sys/lib/libkern/arch/amd64/memmove.S @@ -57,7 +57,6 @@ ENTRY(memcpy) movq %rdi,%r11 /* save dest */ movq %rdx,%rcx 2: - cld /* copy forwards. */ shrq $3,%rcx /* copy by words */ rep movsq diff --git a/sys/lib/libkern/arch/amd64/memset.S b/sys/lib/libkern/arch/amd64/memset.S index 670d9426b13..67d6404e932 100644 --- a/sys/lib/libkern/arch/amd64/memset.S +++ b/sys/lib/libkern/arch/amd64/memset.S @@ -12,8 +12,6 @@ ENTRY(memset) movq %rdx,%rcx movq %rdi,%r11 - cld /* set fill direction forward */ - /* * if the string is too short, it's really not worth the overhead * of aligning to word boundaries, etc. So we jump to a plain diff --git a/sys/lib/libkern/arch/amd64/scanc.S b/sys/lib/libkern/arch/amd64/scanc.S index f125ed295d3..4ecaae3c15b 100644 --- a/sys/lib/libkern/arch/amd64/scanc.S +++ b/sys/lib/libkern/arch/amd64/scanc.S @@ -43,7 +43,6 @@ ENTRY(scanc) jz 2f movq %r11,%rdi xorq %rax,%rax - cld 1: lodsb testb %dl,(%rax,%rdi) diff --git a/sys/lib/libkern/arch/amd64/skpc.S b/sys/lib/libkern/arch/amd64/skpc.S index 7addfa9b74e..5942a1c07e8 100644 --- a/sys/lib/libkern/arch/amd64/skpc.S +++ b/sys/lib/libkern/arch/amd64/skpc.S @@ -39,7 +39,6 @@ ENTRY(skpc) movl %edi,%eax movq %rsi,%rcx movq %rdx,%rdi - cld repe scasb je 1f |