-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/sched.h>
-#include <linux/hardirq.h>
-#include <linux/module.h>
-
-#include <asm/asm.h>
-#include <asm/i387.h>
-
-
/*
* MMX 3DNow! library helper functions
*
* To do:
- * We can use MMX just for prefetch in IRQ's. This may be a win.
+ * We can use MMX just for prefetch in IRQ's. This may be a win.
* (reported so on K6-III)
* We should use a better code neutral filler for the short jump
* leal ebx. [ebx] is apparently best for K6-2, but Cyrix ??
* We also want to clobber the filler register so we don't get any
- * register forwarding stalls on the filler.
+ * register forwarding stalls on the filler.
*
* Add *user handling. Checksums are not a win with MMX on any CPU
* tested so far for any MMX solution figured.
*
- * 22/09/2000 - Arjan van de Ven
- * Improved for non-egineering-sample Athlons
+ * 22/09/2000 - Arjan van de Ven
+ * Improved for non-egineering-sample Athlons
*
*/
-
+#include <linux/hardirq.h>
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+
+#include <asm/i387.h>
+#include <asm/asm.h>
+
void *_mmx_memcpy(void *to, const void *from, size_t len)
{
void *p;
"3: movw $0x1AEB, 1b\n" /* jmp on 26 bytes */
" jmp 2b\n"
".previous\n"
- _ASM_EXTABLE(1b,3b)
- : : "r" (from) );
-
-
- for(; i>5; i--)
- {
+ _ASM_EXTABLE(1b, 3b)
+ : : "r" (from));
+
+ for ( ; i > 5; i--) {
__asm__ __volatile__ (
"1: prefetch 320(%0)\n"
"2: movq (%0), %%mm0\n"
"3: movw $0x05EB, 1b\n" /* jmp on 5 bytes */
" jmp 2b\n"
".previous\n"
- _ASM_EXTABLE(1b,3b)
- : : "r" (from), "r" (to) : "memory");
- from+=64;
- to+=64;
+ _ASM_EXTABLE(1b, 3b)
+ : : "r" (from), "r" (to) : "memory");
+
+ from += 64;
+ to += 64;
}
- for(; i>0; i--)
- {
+ for ( ; i > 0; i--) {
__asm__ __volatile__ (
" movq (%0), %%mm0\n"
" movq 8(%0), %%mm1\n"
" movq %%mm1, 40(%1)\n"
" movq %%mm2, 48(%1)\n"
" movq %%mm3, 56(%1)\n"
- : : "r" (from), "r" (to) : "memory");
- from+=64;
- to+=64;
+ : : "r" (from), "r" (to) : "memory");
+
+ from += 64;
+ to += 64;
}
/*
- * Now do the tail of the block
+ * Now do the tail of the block:
*/
- __memcpy(to, from, len&63);
+ __memcpy(to, from, len & 63);
kernel_fpu_end();
+
return p;
}
+EXPORT_SYMBOL(_mmx_memcpy);
#ifdef CONFIG_MK7
int i;
kernel_fpu_begin();
-
+
__asm__ __volatile__ (
" pxor %%mm0, %%mm0\n" : :
);
- for(i=0;i<4096/64;i++)
- {
+ for (i = 0; i < 4096/64; i++) {
__asm__ __volatile__ (
" movntq %%mm0, (%0)\n"
" movntq %%mm0, 8(%0)\n"
" movntq %%mm0, 48(%0)\n"
" movntq %%mm0, 56(%0)\n"
: : "r" (page) : "memory");
- page+=64;
+ page += 64;
}
- /* since movntq is weakly-ordered, a "sfence" is needed to become
- * ordered again.
+
+ /*
+ * Since movntq is weakly-ordered, a "sfence" is needed to become
+ * ordered again:
*/
- __asm__ __volatile__ (
- " sfence \n" : :
- );
+ __asm__ __volatile__("sfence\n"::);
+
kernel_fpu_end();
}
kernel_fpu_begin();
- /* maybe the prefetch stuff can go before the expensive fnsave...
+ /*
+ * maybe the prefetch stuff can go before the expensive fnsave...
* but that is for later. -AV
*/
- __asm__ __volatile__ (
+ __asm__ __volatile__(
"1: prefetch (%0)\n"
" prefetch 64(%0)\n"
" prefetch 128(%0)\n"
"3: movw $0x1AEB, 1b\n" /* jmp on 26 bytes */
" jmp 2b\n"
".previous\n"
- _ASM_EXTABLE(1b,3b)
- : : "r" (from) );
+ _ASM_EXTABLE(1b, 3b) : : "r" (from));
- for(i=0; i<(4096-320)/64; i++)
- {
+ for (i = 0; i < (4096-320)/64; i++) {
__asm__ __volatile__ (
"1: prefetch 320(%0)\n"
"2: movq (%0), %%mm0\n"
"3: movw $0x05EB, 1b\n" /* jmp on 5 bytes */
" jmp 2b\n"
".previous\n"
- _ASM_EXTABLE(1b,3b)
- : : "r" (from), "r" (to) : "memory");
- from+=64;
- to+=64;
+ _ASM_EXTABLE(1b, 3b) : : "r" (from), "r" (to) : "memory");
+
+ from += 64;
+ to += 64;
}
- for(i=(4096-320)/64; i<4096/64; i++)
- {
+
+ for (i = (4096-320)/64; i < 4096/64; i++) {
__asm__ __volatile__ (
"2: movq (%0), %%mm0\n"
" movntq %%mm0, (%1)\n"
" movntq %%mm6, 48(%1)\n"
" movq 56(%0), %%mm7\n"
" movntq %%mm7, 56(%1)\n"
- : : "r" (from), "r" (to) : "memory");
- from+=64;
- to+=64;
+ : : "r" (from), "r" (to) : "memory");
+ from += 64;
+ to += 64;
}
- /* since movntq is weakly-ordered, a "sfence" is needed to become
- * ordered again.
+ /*
+ * Since movntq is weakly-ordered, a "sfence" is needed to become
+ * ordered again:
*/
- __asm__ __volatile__ (
- " sfence \n" : :
- );
+ __asm__ __volatile__("sfence \n"::);
kernel_fpu_end();
}
-#else
+#else /* CONFIG_MK7 */
/*
* Generic MMX implementation without K7 specific streaming
*/
-
static void fast_clear_page(void *page)
{
int i;
-
+
kernel_fpu_begin();
-
+
__asm__ __volatile__ (
" pxor %%mm0, %%mm0\n" : :
);
- for(i=0;i<4096/128;i++)
- {
+ for (i = 0; i < 4096/128; i++) {
__asm__ __volatile__ (
" movq %%mm0, (%0)\n"
" movq %%mm0, 8(%0)\n"
" movq %%mm0, 104(%0)\n"
" movq %%mm0, 112(%0)\n"
" movq %%mm0, 120(%0)\n"
- : : "r" (page) : "memory");
- page+=128;
+ : : "r" (page) : "memory");
+ page += 128;
}
kernel_fpu_end();
static void fast_copy_page(void *to, void *from)
{
int i;
-
-
+
kernel_fpu_begin();
__asm__ __volatile__ (
"3: movw $0x1AEB, 1b\n" /* jmp on 26 bytes */
" jmp 2b\n"
".previous\n"
- _ASM_EXTABLE(1b,3b)
- : : "r" (from) );
+ _ASM_EXTABLE(1b, 3b) : : "r" (from));
- for(i=0; i<4096/64; i++)
- {
+ for (i = 0; i < 4096/64; i++) {
__asm__ __volatile__ (
"1: prefetch 320(%0)\n"
"2: movq (%0), %%mm0\n"
"3: movw $0x05EB, 1b\n" /* jmp on 5 bytes */
" jmp 2b\n"
".previous\n"
- _ASM_EXTABLE(1b,3b)
- : : "r" (from), "r" (to) : "memory");
- from+=64;
- to+=64;
+ _ASM_EXTABLE(1b, 3b)
+ : : "r" (from), "r" (to) : "memory");
+
+ from += 64;
+ to += 64;
}
kernel_fpu_end();
}
-
-#endif
+#endif /* !CONFIG_MK7 */
/*
- * Favour MMX for page clear and copy.
+ * Favour MMX for page clear and copy:
*/
-
-static void slow_zero_page(void * page)
+static void slow_zero_page(void *page)
{
int d0, d1;
- __asm__ __volatile__( \
- "cld\n\t" \
- "rep ; stosl" \
- : "=&c" (d0), "=&D" (d1)
- :"a" (0),"1" (page),"0" (1024)
- :"memory");
+
+ __asm__ __volatile__(
+ "cld\n\t"
+ "rep ; stosl"
+
+ : "=&c" (d0), "=&D" (d1)
+ :"a" (0), "1" (page), "0" (1024)
+ :"memory");
}
-
-void mmx_clear_page(void * page)
+
+void mmx_clear_page(void *page)
{
- if(unlikely(in_interrupt()))
+ if (unlikely(in_interrupt()))
slow_zero_page(page);
else
fast_clear_page(page);
}
+EXPORT_SYMBOL(mmx_clear_page);
static void slow_copy_page(void *to, void *from)
{
int d0, d1, d2;
- __asm__ __volatile__( \
- "cld\n\t" \
- "rep ; movsl" \
- : "=&c" (d0), "=&D" (d1), "=&S" (d2) \
- : "0" (1024),"1" ((long) to),"2" ((long) from) \
+
+ __asm__ __volatile__(
+ "cld\n\t"
+ "rep ; movsl"
+ : "=&c" (d0), "=&D" (d1), "=&S" (d2)
+ : "0" (1024), "1" ((long) to), "2" ((long) from)
: "memory");
}
-
void mmx_copy_page(void *to, void *from)
{
- if(unlikely(in_interrupt()))
+ if (unlikely(in_interrupt()))
slow_copy_page(to, from);
else
fast_copy_page(to, from);
}
-
-EXPORT_SYMBOL(_mmx_memcpy);
-EXPORT_SYMBOL(mmx_clear_page);
EXPORT_SYMBOL(mmx_copy_page);
projects / linux-2.6 / commitdiff