On Wed, Feb 05, 2014 at 09:59:45AM +0100, Anton Khirnov wrote:
> --- a/libavcodec/ppc/vp8dsp_altivec.c
> +++ b/libavcodec/ppc/vp8dsp_altivec.c
> @@ -269,9 +269,44 @@ EPEL_HV(4, 4,6)
>
> +static void put_vp8_pixels16_altivec(uint8_t *dst, ptrdiff_t dstride,
> uint8_t *src, ptrdiff_t sstride, int h, int mx, int my)
> {
> - ff_put_pixels16_altivec(dst, src, stride, h);
> + register vector unsigned char pixelsv1, pixelsv2;
> + register vector unsigned char pixelsv1B, pixelsv2B;
> + register vector unsigned char pixelsv1C, pixelsv2C;
> + register vector unsigned char pixelsv1D, pixelsv2D;
> +
> + register vector unsigned char perm = vec_lvsl(0, src);
> + int i;
> + register ptrdiff_t dstride2 = dstride << 1, sstride2 = sstride << 1;
> + register ptrdiff_t dstride3 = dstride2 + dstride, sstride3 = sstride +
> sstride2;
> + register ptrdiff_t dstride4 = dstride << 2, sstride4 = sstride << 2;
> +
> +// hand-unrolling the loop by 4 gains about 15%
> +// mininum execution time goes from 74 to 60 cycles
> +// it's faster than -funroll-loops, but using
> +// -funroll-loops w/ this is bad - 74 cycles again.
> +// all this is on a 7450, tuning for the 7450
> + for (i = 0; i < h; i += 4) {
> + pixelsv1 = vec_ld( 0, src);
> + pixelsv2 = vec_ld(15, src);
> + pixelsv1B = vec_ld(sstride, src);
> + pixelsv2B = vec_ld(15 + sstride, src);
> + pixelsv1C = vec_ld(sstride2, src);
> + pixelsv2C = vec_ld(15 + sstride2, src);
> + pixelsv1D = vec_ld(sstride3, src);
> + pixelsv2D = vec_ld(15 + sstride3, src);
> + vec_st(vec_perm(pixelsv1, pixelsv2, perm),
> + 0, (unsigned char*)dst);
> + vec_st(vec_perm(pixelsv1B, pixelsv2B, perm),
> + dstride, (unsigned char*)dst);
> + vec_st(vec_perm(pixelsv1C, pixelsv2C, perm),
> + dstride2, (unsigned char*)dst);
> + vec_st(vec_perm(pixelsv1D, pixelsv2D, perm),
> + dstride3, (unsigned char*)dst);
> + src += sstride4;
> + dst += dstride4;
> + }
> }
This duplicates the ff_put_pixels16_altivec() function from
libavcodec/ppc/hpeldsp_altivec.c.
Diego
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