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amd64: add a note about simd to libc memset, memmove and memcmp

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This commit is contained in:
Mateusz Guzik 2021-01-31 16:50:34 +01:00
parent 46f168bc66
commit 0db6aef407
3 changed files with 18 additions and 0 deletions
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6
lib/libc/amd64/string/memcmp.S
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@ -31,6 +31,12 @@
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
/*
* Note: this routine was written with kernel use in mind (read: no simd),
* it is only present in userspace as a temporary measure until something
* better gets imported.
*/
#define ALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */
ENTRY(memcmp)

6
lib/libc/amd64/string/memmove.S
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@ -29,6 +29,12 @@
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
/*
* Note: this routine was written with kernel use in mind (read: no simd),
* it is only present in userspace as a temporary measure until something
* better gets imported.
*/
#define ALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */
/*

6
lib/libc/amd64/string/memset.S
View File

@ -31,6 +31,12 @@
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
/*
* Note: this routine was written with kernel use in mind (read: no simd),
* it is only present in userspace as a temporary measure until something
* better gets imported.
*/
#define ALIGN_TEXT .p2align 4,0x90 /* 16-byte alignment, nop filled */
.macro MEMSET erms