From a8486a3b690317903172f1b75953e4790abae51b Mon Sep 17 00:00:00 2001 From: "sgunderson@bigfoot.com" <> Date: Sun, 3 Feb 2008 17:13:25 +0100 Subject: [PATCH] Implement first round of SSE. --- qscale.c | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 100 insertions(+), 10 deletions(-) diff --git a/qscale.c b/qscale.c index 8fecd66..d5536bc 100644 --- a/qscale.c +++ b/qscale.c @@ -1,10 +1,11 @@ #include +#include #include #include #include #include "jpeglib.h" -#define CACHE_LINE_FACTOR 8 +#define CACHE_LINE_FACTOR 16 double sinc(double x) { @@ -147,19 +148,19 @@ void vscale(unsigned char *pix, float *npix, unsigned w, unsigned h, unsigned nh } #if CACHE_LINE_FACTOR > 1 - for (x = 0; x < w; x += CACHE_LINE_FACTOR) { + for (x = 0; x < (w/CACHE_LINE_FACTOR) * CACHE_LINE_FACTOR; x += CACHE_LINE_FACTOR) { unsigned char *sptr = pix + x; float *dptr = npix + x; for (y = 0; y < nh; ++y) { +#if 0 int i; float acc[CACHE_LINE_FACTOR]; for (i = 0; i < CACHE_LINE_FACTOR; ++i) acc[i] = 0.0; float *cf = &coeffs[pd[y].startcoeff]; unsigned sy; - + for (sy = pd[y].start; sy <= pd[y].end; ++sy) { - //asm volatile ("prefetcht0 %0" :: "m" (sptr[(sy+1) * w])); for (i = 0; i < CACHE_LINE_FACTOR; ++i) { acc[i] += sptr[sy * w + i] * *cf; } @@ -169,6 +170,95 @@ void vscale(unsigned char *pix, float *npix, unsigned w, unsigned h, unsigned nh for (i = 0; i < CACHE_LINE_FACTOR; ++i) { dptr[i] = acc[i]; } +#else + /* + * xmm0 - xmm3: acc[0..15] + * xmm4: current filter coefficient + * xmm5, xmm6, xmm7: scratchpad + */ + asm ( + /* clear */ + "pxor %%xmm0, %%xmm0 \n" + "pxor %%xmm1, %%xmm1 \n" + "pxor %%xmm2, %%xmm2 \n" + "pxor %%xmm3, %%xmm3 \n" + + /* main loop */ + ".lbl: \n" + + /* a zero is useful during unpacking */ + "pxor %%xmm4, %%xmm4 \n" + + /* fetch all 16 source bytes */ + "movups (%0), %%xmm5 \n" + "prefetcht0 (%0,%3,4) \n" + + /* unpack into words (xmm5, xmm7) */ + "movaps %%xmm5, %%xmm7 \n" + "punpcklbw %%xmm4, %%xmm5 \n" + "punpckhbw %%xmm4, %%xmm7 \n" + + /* unpack xmm5 into dwords (xmm5, xmm6) */ + "movaps %%xmm5, %%xmm6 \n" + "punpcklwd %%xmm4, %%xmm5 \n" + "punpckhwd %%xmm4, %%xmm6 \n" + + /* convert xmm5, xmm6 to floats */ + "cvtdq2ps %%xmm5, %%xmm5 \n" + "cvtdq2ps %%xmm6, %%xmm6 \n" + + /* fetch the coefficient */ + "movss (%2), %%xmm4 \n" + "shufps $0x0, %%xmm4, %%xmm4 \n" + + /* do the muls for xmm5 and xmm6 */ + "mulps %%xmm4, %%xmm5 \n" + "mulps %%xmm4, %%xmm6 \n" + "addps %%xmm5, %%xmm0 \n" + "addps %%xmm6, %%xmm1 \n" + + /* get the zero back again */ + "pxor %%xmm4, %%xmm4 \n" + + /* unpack xmm7 into dwords (xmm7, xmm6) */ + "movaps %%xmm7, %%xmm6 \n" + "punpcklwd %%xmm4, %%xmm7 \n" + "punpckhwd %%xmm4, %%xmm6 \n" + + /* convert xmm7, xmm6 to floats */ + "cvtdq2ps %%xmm7, %%xmm7 \n" + "cvtdq2ps %%xmm6, %%xmm6 \n" + + /* fetch the coefficient */ + "movss (%2), %%xmm4 \n" + "shufps $0x0, %%xmm4, %%xmm4 \n" + + /* do the second set of muls */ + "mulps %%xmm4, %%xmm7 \n" + "mulps %%xmm4, %%xmm6 \n" + "addps %%xmm7, %%xmm2 \n" + "addps %%xmm6, %%xmm3 \n" + + /* move along, and loop */ + "addl $4, %2 \n" + "addl %3, %0 \n" + "decl %1 \n" + "jnz .lbl \n" + + /* store the values */ + "movaps %%xmm0, (%4) \n" + "movaps %%xmm1, 16(%4) \n" + "movaps %%xmm2, 32(%4) \n" + "movaps %%xmm3, 48(%4) \n" + : : + "r" (&sptr[pd[y].start * w]), /* 0: srcptr base */ + "r" (pd[y].end - pd[y].start + 1), /* 1: filter len */ + "r" (&coeffs[pd[y].startcoeff]), /* 2: coeffs base */ + "r" (w), /* 3: stride */ + "r" (dptr) /* 4: dstptr base */ + : "memory", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" + ); +#endif dptr += dstride; } } @@ -225,9 +315,9 @@ int main(int argc, char **argv) fprintf(stderr, " Cb component: %ux%u -> %ux%u\n", dinfo.comp_info[1].width_in_blocks * DCTSIZE, dinfo.comp_info[1].height_in_blocks * DCTSIZE, nw1, nh1); fprintf(stderr, " Cr component: %ux%u -> %ux%u\n", dinfo.comp_info[2].width_in_blocks * DCTSIZE, dinfo.comp_info[2].height_in_blocks * DCTSIZE, nw2, nh2); - JSAMPLE *data_y = (JSAMPLE*)malloc(dinfo.comp_info[0].height_in_blocks * dinfo.comp_info[0].width_in_blocks * DCTSIZE * DCTSIZE); - JSAMPLE *data_cb = (JSAMPLE*)malloc(dinfo.comp_info[1].height_in_blocks * dinfo.comp_info[1].width_in_blocks * DCTSIZE * DCTSIZE); - JSAMPLE *data_cr = (JSAMPLE*)malloc(dinfo.comp_info[2].height_in_blocks * dinfo.comp_info[2].width_in_blocks * DCTSIZE * DCTSIZE); + JSAMPLE *data_y = (JSAMPLE*)memalign(16, dinfo.comp_info[0].height_in_blocks * dinfo.comp_info[0].width_in_blocks * DCTSIZE * DCTSIZE); + JSAMPLE *data_cb = (JSAMPLE*)memalign(16, dinfo.comp_info[1].height_in_blocks * dinfo.comp_info[1].width_in_blocks * DCTSIZE * DCTSIZE); + JSAMPLE *data_cr = (JSAMPLE*)memalign(16, dinfo.comp_info[2].height_in_blocks * dinfo.comp_info[2].width_in_blocks * DCTSIZE * DCTSIZE); JSAMPLE *data_ny, *data_ncb, *data_ncr; int total_lines = 0, blocks = 0; @@ -254,21 +344,21 @@ int main(int argc, char **argv) } { - float *npix = (float*)malloc(dinfo.comp_info[0].width_in_blocks * DCTSIZE * nh0 * sizeof(float)); + float *npix = (float*)memalign(16, dinfo.comp_info[0].width_in_blocks * DCTSIZE * nh0 * sizeof(float)); vscale(data_y, npix, dinfo.comp_info[0].width_in_blocks * DCTSIZE, dinfo.comp_info[0].height_in_blocks * DCTSIZE, nh0, dinfo.comp_info[0].width_in_blocks * DCTSIZE); data_ny = (unsigned char *)malloc(nw0 * stride0); hscale(npix, data_ny, dinfo.comp_info[0].width_in_blocks * DCTSIZE, nh0, nw0, stride0); free(npix); } { - float *npix = (float*)malloc(dinfo.comp_info[1].width_in_blocks * DCTSIZE * nh1 * sizeof(float)); + float *npix = (float*)memalign(16, dinfo.comp_info[1].width_in_blocks * DCTSIZE * nh1 * sizeof(float)); vscale(data_cr, npix, dinfo.comp_info[1].width_in_blocks * DCTSIZE, dinfo.comp_info[1].height_in_blocks * DCTSIZE, nh1, dinfo.comp_info[1].width_in_blocks * DCTSIZE); data_ncr = (unsigned char *)malloc(nw1 * stride1); hscale(npix, data_ncr, dinfo.comp_info[1].width_in_blocks * DCTSIZE, nh1, nw1, stride1); free(npix); } { - float *npix = (float*)malloc(dinfo.comp_info[2].width_in_blocks * DCTSIZE * nh2 * sizeof(float)); + float *npix = (float*)memalign(16, dinfo.comp_info[2].width_in_blocks * DCTSIZE * nh2 * sizeof(float)); vscale(data_cb, npix, dinfo.comp_info[2].width_in_blocks * DCTSIZE, dinfo.comp_info[2].height_in_blocks * DCTSIZE, nh2, dinfo.comp_info[2].width_in_blocks * DCTSIZE); data_ncb = (unsigned char *)malloc(nw2 * stride2); hscale(npix, data_ncb, dinfo.comp_info[2].width_in_blocks * DCTSIZE, nh2, nw2, stride2); -- 2.39.2