Commit 820e8fec authored by Vivek Goyal's avatar Vivek Goyal Committed by H. Peter Anvin

x86, boot: Move optimized memcpy() 32/64 bit versions to compressed/string.c

Move optimized versions of memcpy to compressed/string.c This will allow
any other code to use these functions too if need be in future. Again
trying to put definition in a common place instead of hiding it in misc.c
Signed-off-by: default avatarVivek Goyal <vgoyal@redhat.com>
Link: http://lkml.kernel.org/r/1395170800-11059-4-git-send-email-vgoyal@redhat.comSigned-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent c041b5ad
...@@ -10,6 +10,7 @@ ...@@ -10,6 +10,7 @@
*/ */
#include "misc.h" #include "misc.h"
#include "../string.h"
/* WARNING!! /* WARNING!!
* This code is compiled with -fPIC and it is relocated dynamically * This code is compiled with -fPIC and it is relocated dynamically
...@@ -110,7 +111,6 @@ static void error(char *m); ...@@ -110,7 +111,6 @@ static void error(char *m);
struct boot_params *real_mode; /* Pointer to real-mode data */ struct boot_params *real_mode; /* Pointer to real-mode data */
void *memset(void *s, int c, size_t n); void *memset(void *s, int c, size_t n);
void *memcpy(void *dest, const void *src, size_t n);
memptr free_mem_ptr; memptr free_mem_ptr;
memptr free_mem_end_ptr; memptr free_mem_end_ptr;
...@@ -225,35 +225,6 @@ void *memset(void *s, int c, size_t n) ...@@ -225,35 +225,6 @@ void *memset(void *s, int c, size_t n)
ss[i] = c; ss[i] = c;
return s; return s;
} }
#ifdef CONFIG_X86_32
void *memcpy(void *dest, const void *src, size_t n)
{
int d0, d1, d2;
asm volatile(
"rep ; movsl\n\t"
"movl %4,%%ecx\n\t"
"rep ; movsb\n\t"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
: "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src)
: "memory");
return dest;
}
#else
void *memcpy(void *dest, const void *src, size_t n)
{
long d0, d1, d2;
asm volatile(
"rep ; movsq\n\t"
"movq %4,%%rcx\n\t"
"rep ; movsb\n\t"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
: "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src)
: "memory");
return dest;
}
#endif
static void error(char *x) static void error(char *x)
{ {
......
...@@ -11,3 +11,36 @@ int memcmp(const void *s1, const void *s2, size_t len) ...@@ -11,3 +11,36 @@ int memcmp(const void *s1, const void *s2, size_t len)
} }
#include "../string.c" #include "../string.c"
/* misc.h might pull in string_32.h which has a macro for memcpy. undef that */
#undef memcpy
#ifdef CONFIG_X86_32
void *memcpy(void *dest, const void *src, size_t n)
{
int d0, d1, d2;
asm volatile(
"rep ; movsl\n\t"
"movl %4,%%ecx\n\t"
"rep ; movsb\n\t"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
: "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src)
: "memory");
return dest;
}
#else
void *memcpy(void *dest, const void *src, size_t n)
{
long d0, d1, d2;
asm volatile(
"rep ; movsq\n\t"
"movq %4,%%rcx\n\t"
"rep ; movsb\n\t"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
: "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src)
: "memory");
return dest;
}
#endif
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