mirror of https://github.com/nothings/stb-imv
optimize MMX code
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nothings.org
parent
1fbe7337a4
commit
7e00a81516
68
imv.c
68
imv.c
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@ -1629,6 +1629,8 @@ int cur_is_current(void)
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return !strcmp(cur_filename, source_c->filename);
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}
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#define MAX_RESIZE 4
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int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
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{
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char filenamebuffer[4096];
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@ -1645,7 +1647,9 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
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int image_n;
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resize_threads = stb_processor_count();
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if (resize_threads > 4) resize_threads = 4;
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resize_threads = 8;
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if (resize_threads > MAX_RESIZE) resize_threads = MAX_RESIZE;
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#ifdef _DEBUG
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do_debug = IsDebuggerPresent();
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@ -2010,6 +2014,7 @@ void image_resize_old(Image *dest, Image *src)
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stb_tempfree(proc_buffer , q);
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}
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#if BPP==4
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//
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#undef R
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@ -2081,38 +2086,44 @@ static void cubicRGBA(uint32 *dest, uint32 *x0, uint32 *x1, uint32 *x2, uint32 *
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} looptop: __asm {
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movd mm1,[eax]
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movd mm4,[edx]
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movd mm2,[ebx]
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movd mm3,[ecx]
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movd mm4,[edx]
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add eax,step_src
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add ebx,step_src
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punpcklbw mm1,mm0 // mm1 = x0
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punpcklbw mm4,mm0 // mm4 = x3
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punpcklbw mm2,mm0 // mm2 = x1
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punpcklbw mm3,mm0 // mm3 = x2
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punpcklbw mm4,mm0 // mm4 = x3
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add ecx,step_src
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add edx,step_src
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#if 1
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// catmull-rom cubic
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// "scheduled" to try to spread stuff out early
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// also the final shift by two has been optimized up earlier
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// (which means we really only get 6-7 good bits)
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psubw mm4,mm1 // mm4 = x3-x0
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movq mm5,mm2 // mm5 = x1
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psubw mm5,mm3 // mm5 = x1-x2
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pmullw mm5,three // mm5 = 3*(x1-x2)
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paddw mm5,mm4 // mm5 = a
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paddw mm2,mm2 // mm2 = d
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movq mm6,mm3 // mm6 = x2
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psubw mm6,mm1 // mm6 = c
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psubw mm5,mm3 // mm5 = x1-x2
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paddw mm3,mm1 // mm3 = x0+x2
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psubw mm6,mm1 // mm6 = c
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psubw mm3,mm2 // mm3 = x0+x2-d/2
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pmullw mm5,three // mm5 = 3*(x1-x2)
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psubw mm3,mm2 // mm3 = x0+x2-d
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psubw mm3,mm5 // mm3 = b
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psllw mm5,3 // mm5 = a(15.1)
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pmulhw mm5,mm7 // mm5 = a
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pmulhw mm5,mm7 // mm5 = a
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pmulhw mm5,mm7 // mm5 = a*t^3
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psllw mm3,2 // mm3 = b
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pmulhw mm3,mm7 // mm3 = b
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pmulhw mm3,mm7 // mm3 = b*t^2
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psllw mm6,1 // mm6 = c
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pmulhw mm6,mm7 // mm6 = c*t
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paddw mm5,mm2
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paddw mm5,mm3
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paddw mm5,mm4 // mm5 = a
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psubw mm3,mm5 // mm3 = b
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psllw mm5,2 // mm5 = a(15.1)
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psllw mm3,1 // mm3 = b
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pmulhw mm5,mm7 // mm5 = a*t
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paddw mm6,mm2 // mm6 = c*t+d
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paddw mm5,mm3 // mm5 = a*t + b
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pmulhw mm5,mm7 // mm5 = a*t^2+b*t
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pmulhw mm5,mm7 // mm5 = a*t^3+b*t^2
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paddw mm5,mm6
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psraw mm5,1
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packuswb mm5,mm5
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movd [edi],mm5
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#else
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@ -2139,10 +2150,6 @@ static void cubicRGBA(uint32 *dest, uint32 *x0, uint32 *x1, uint32 *x2, uint32 *
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packuswb mm1,mm1
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movd [edi],mm1
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#endif
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add eax,step_src
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add ebx,step_src
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add ecx,step_src
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add edx,step_src
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add edi,step_dest
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dec esi
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jnz looptop
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@ -2253,7 +2260,7 @@ Image *grCubicScaleBitmapX(Image *src, int out_w)
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if (resize_threads == 1) {
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grCubicScaleBitmapX_work(0);
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} else {
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volatile void *which[4];
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volatile void *which[MAX_RESIZE];
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for (i=0; i < resize_threads; ++i)
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which[i] = (void *) 1;
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barrier();
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@ -2308,7 +2315,7 @@ Image *grCubicScaleBitmapY(Image *src, int out_h)
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if (resize_threads == 1) {
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grCubicScaleBitmapY_work(0);
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} else {
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volatile void *which[4];
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volatile void *which[MAX_RESIZE];
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for (i=0; i < resize_threads; ++i)
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which[i] = (void *) 1;
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barrier();
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@ -2409,13 +2416,6 @@ Image *grScaleBitmap(Image *src, int gx, int gy, Image *dest)
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// check if we're scaling up
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if (gx > src->x || gy > src->y) {
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upsample = TRUE;
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#if 0
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res = grCubicScaleBitmapY(src, gy);
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to_free = res;
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res = grCubicScaleBitmapX(res, gx);
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imfree(to_free);
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return res;
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#endif
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} else {
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// maybe should do something smarter here, like find the
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// nearest box size, instead of repetitive powers of two
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@ -2461,7 +2461,7 @@ Image *grScaleBitmap(Image *src, int gx, int gy, Image *dest)
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}
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return res;
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}
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#endif // BPP==4
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void image_resize(Image *dest, Image *src)
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{
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