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optimize MMX code

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nothings.org 2007-06-29 22:00:49 +00:00
parent 1fbe7337a4
commit 7e00a81516
1 changed files with 34 additions and 34 deletions
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68
imv.c
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@ -1629,6 +1629,8 @@ int cur_is_current(void)
return !strcmp(cur_filename, source_c->filename);
}
#define MAX_RESIZE 4
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
char filenamebuffer[4096];
@ -1645,7 +1647,9 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
int image_n;
resize_threads = stb_processor_count();
if (resize_threads > 4) resize_threads = 4;
resize_threads = 8;
if (resize_threads > MAX_RESIZE) resize_threads = MAX_RESIZE;
#ifdef _DEBUG
do_debug = IsDebuggerPresent();
@ -2010,6 +2014,7 @@ void image_resize_old(Image *dest, Image *src)
stb_tempfree(proc_buffer , q);
}
#if BPP==4
//
#undef R
@ -2081,38 +2086,44 @@ static void cubicRGBA(uint32 *dest, uint32 *x0, uint32 *x1, uint32 *x2, uint32 *
} looptop: __asm {
movd mm1,[eax]
movd mm4,[edx]
movd mm2,[ebx]
movd mm3,[ecx]
movd mm4,[edx]
add eax,step_src
add ebx,step_src
punpcklbw mm1,mm0 // mm1 = x0
punpcklbw mm4,mm0 // mm4 = x3
punpcklbw mm2,mm0 // mm2 = x1
punpcklbw mm3,mm0 // mm3 = x2
punpcklbw mm4,mm0 // mm4 = x3
add ecx,step_src
add edx,step_src
#if 1
// catmull-rom cubic
// "scheduled" to try to spread stuff out early
// also the final shift by two has been optimized up earlier
// (which means we really only get 6-7 good bits)
psubw mm4,mm1 // mm4 = x3-x0
movq mm5,mm2 // mm5 = x1
psubw mm5,mm3 // mm5 = x1-x2
pmullw mm5,three // mm5 = 3*(x1-x2)
paddw mm5,mm4 // mm5 = a
paddw mm2,mm2 // mm2 = d
movq mm6,mm3 // mm6 = x2
psubw mm6,mm1 // mm6 = c
psubw mm5,mm3 // mm5 = x1-x2
paddw mm3,mm1 // mm3 = x0+x2
psubw mm6,mm1 // mm6 = c
psubw mm3,mm2 // mm3 = x0+x2-d/2
pmullw mm5,three // mm5 = 3*(x1-x2)
psubw mm3,mm2 // mm3 = x0+x2-d
psubw mm3,mm5 // mm3 = b
psllw mm5,3 // mm5 = a(15.1)
pmulhw mm5,mm7 // mm5 = a
pmulhw mm5,mm7 // mm5 = a
pmulhw mm5,mm7 // mm5 = a*t^3
psllw mm3,2 // mm3 = b
pmulhw mm3,mm7 // mm3 = b
pmulhw mm3,mm7 // mm3 = b*t^2
psllw mm6,1 // mm6 = c
pmulhw mm6,mm7 // mm6 = c*t
paddw mm5,mm2
paddw mm5,mm3
paddw mm5,mm4 // mm5 = a
psubw mm3,mm5 // mm3 = b
psllw mm5,2 // mm5 = a(15.1)
psllw mm3,1 // mm3 = b
pmulhw mm5,mm7 // mm5 = a*t
paddw mm6,mm2 // mm6 = c*t+d
paddw mm5,mm3 // mm5 = a*t + b
pmulhw mm5,mm7 // mm5 = a*t^2+b*t
pmulhw mm5,mm7 // mm5 = a*t^3+b*t^2
paddw mm5,mm6
psraw mm5,1
packuswb mm5,mm5
movd [edi],mm5
#else
@ -2139,10 +2150,6 @@ static void cubicRGBA(uint32 *dest, uint32 *x0, uint32 *x1, uint32 *x2, uint32 *
packuswb mm1,mm1
movd [edi],mm1
#endif
add eax,step_src
add ebx,step_src
add ecx,step_src
add edx,step_src
add edi,step_dest
dec esi
jnz looptop
@ -2253,7 +2260,7 @@ Image *grCubicScaleBitmapX(Image *src, int out_w)
if (resize_threads == 1) {
grCubicScaleBitmapX_work(0);
} else {
volatile void *which[4];
volatile void *which[MAX_RESIZE];
for (i=0; i < resize_threads; ++i)
which[i] = (void *) 1;
barrier();
@ -2308,7 +2315,7 @@ Image *grCubicScaleBitmapY(Image *src, int out_h)
if (resize_threads == 1) {
grCubicScaleBitmapY_work(0);
} else {
volatile void *which[4];
volatile void *which[MAX_RESIZE];
for (i=0; i < resize_threads; ++i)
which[i] = (void *) 1;
barrier();
@ -2409,13 +2416,6 @@ Image *grScaleBitmap(Image *src, int gx, int gy, Image *dest)
// check if we're scaling up
if (gx > src->x || gy > src->y) {
upsample = TRUE;
#if 0
res = grCubicScaleBitmapY(src, gy);
to_free = res;
res = grCubicScaleBitmapX(res, gx);
imfree(to_free);
return res;
#endif
} else {
// maybe should do something smarter here, like find the
// nearest box size, instead of repetitive powers of two
@ -2461,7 +2461,7 @@ Image *grScaleBitmap(Image *src, int gx, int gy, Image *dest)
}
return res;
}
#endif // BPP==4
void image_resize(Image *dest, Image *src)
{