diff options
Diffstat (limited to 'arch/i386/lib/mmx.c')
| -rw-r--r-- | arch/i386/lib/mmx.c | 34 |
1 files changed, 10 insertions, 24 deletions
diff --git a/arch/i386/lib/mmx.c b/arch/i386/lib/mmx.c index 4aca07e72..dfbf7ba8e 100644 --- a/arch/i386/lib/mmx.c +++ b/arch/i386/lib/mmx.c @@ -2,6 +2,8 @@ #include <linux/string.h> #include <linux/sched.h> +#include <asm/i387.h> + /* * MMX 3DNow! library helper functions * @@ -26,13 +28,7 @@ void *_mmx_memcpy(void *to, const void *from, size_t len) void *p=to; int i= len >> 6; /* len/64 */ - if (!(current->flags & PF_USEDFPU)) - clts(); - else - { - __asm__ __volatile__ ( " fnsave %0; fwait\n"::"m"(current->thread.i387)); - current->flags &= ~PF_USEDFPU; - } + kernel_fpu_begin(); __asm__ __volatile__ ( "1: prefetch (%0)\n" /* This set is 28 bytes */ @@ -88,20 +84,15 @@ void *_mmx_memcpy(void *to, const void *from, size_t len) * Now do the tail of the block */ __memcpy(to, from, len&63); - stts(); + kernel_fpu_end(); return p; } static void fast_clear_page(void *page) { int i; - if (!(current->flags & PF_USEDFPU)) - clts(); - else - { - __asm__ __volatile__ ( " fnsave %0; fwait\n"::"m"(current->thread.i387)); - current->flags &= ~PF_USEDFPU; - } + + kernel_fpu_begin(); __asm__ __volatile__ ( " pxor %%mm0, %%mm0\n" : : @@ -127,19 +118,14 @@ static void fast_clear_page(void *page) __asm__ __volatile__ ( " sfence \n" : : ); - stts(); + kernel_fpu_end(); } static void fast_copy_page(void *to, void *from) { int i; - if (!(current->flags & PF_USEDFPU)) - clts(); - else - { - __asm__ __volatile__ ( " fnsave %0; fwait\n"::"m"(current->thread.i387)); - current->flags &= ~PF_USEDFPU; - } + + kernel_fpu_begin(); /* maybe the prefetch stuff can go before the expensive fnsave... * but that is for later. -AV @@ -199,7 +185,7 @@ static void fast_copy_page(void *to, void *from) __asm__ __volatile__ ( " sfence \n" : : ); - stts(); + kernel_fpu_end(); } /* |