On 12/15/2012 12:46 PM, Ronald S. Bultje wrote:
> -
> -#define PREFETCH(name, op) \
> -static void name(void *mem, int stride, int h) \
> -{ \
> - const uint8_t *p = mem; \
> - do { \
> - __asm__ volatile (#op" %0" :: "m"(*p)); \
> - p += stride; \
> - } while (--h); \
> -}
> -
> -PREFETCH(prefetch_mmxext, prefetcht0)
> -PREFETCH(prefetch_3dnow, prefetch)
> -#undef PREFETCH
> -
[...]
> +%macro PREFETCH_FN 1
> +cglobal prefetch, 3, 3, 0, buf, stride, h
> +.loop:
> + %1 [bufq]
> + add bufq, strideq
> + dec hd
> + jg .loop
> + REP_RET
> +%endmacro
> +
> +INIT_MMX mmxext
> +PREFETCH_FN prefetcht0
> +%if ARCH_X86_32
> +INIT_MMX 3dnow
> +PREFETCH_FN prefetch
> +%endif
x86 prefetch() looks ok.
-Justin
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