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comparison src/video/SDL_blit_A.c @ 3931:d65b4a73c991 SDL-1.2

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BlitRGBtoRGBPixelAlphaMMX() is putting the wrong value into a register. Thanks to Alex Volkov for following up on this. Fixes Bugzilla #390.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 04 Apr 2007 09:32:29 +0000
parents af4d584e0edb
children 5fbd763b1c88
comparison
equal deleted inserted replaced
3930:79a4c9017550 3931:d65b4a73c991
367 movq_r2r(mm7, mm0); /* 00FFFFFF -> mm0 */ 367 movq_r2r(mm7, mm0); /* 00FFFFFF -> mm0 */
368 packsswb_r2r(mm6, mm0); /* 00000FFF -> mm0 (channel mask) */ 368 packsswb_r2r(mm6, mm0); /* 00000FFF -> mm0 (channel mask) */
369 packsswb_r2r(mm6, mm3); /* 0000FFFF -> mm3 */ 369 packsswb_r2r(mm6, mm3); /* 0000FFFF -> mm3 */
370 pxor_r2r(mm0, mm3); /* 0000F000 -> mm3 (~channel mask) */ 370 pxor_r2r(mm0, mm3); /* 0000F000 -> mm3 (~channel mask) */
371 /* get alpha channel shift */ 371 /* get alpha channel shift */
372 movd_m2r(sf->Ashift, mm5); /* Ashift -> mm5 */ 372 __asm__ __volatile__ (
373 "movd %0, %%mm5"
374 : : "rm" ((Uint32) sf->Ashift) ); /* Ashift -> mm5 */
373 375
374 while(height--) { 376 while(height--) {
375 DUFFS_LOOP4({ 377 DUFFS_LOOP4({
376 Uint32 alpha = *srcp & amask; 378 Uint32 alpha = *srcp & amask;
377 /* FIXME: Here we special-case opaque alpha since the 379 /* FIXME: Here we special-case opaque alpha since the
1564 int srcskip = info->s_skip >> 2; 1566 int srcskip = info->s_skip >> 2;
1565 Uint32 *dstp = (Uint32 *)info->d_pixels; 1567 Uint32 *dstp = (Uint32 *)info->d_pixels;
1566 int dstskip = info->d_skip >> 2; 1568 int dstskip = info->d_skip >> 2;
1567 SDL_PixelFormat* sf = info->src; 1569 SDL_PixelFormat* sf = info->src;
1568 Uint32 amask = sf->Amask; 1570 Uint32 amask = sf->Amask;
1569 Uint32 ashift = sf->Ashift;
1570 1571
1571 __asm__ ( 1572 __asm__ (
1572 /* make mm6 all zeros. */ 1573 /* make mm6 all zeros. */
1573 "pxor %%mm6, %%mm6\n" 1574 "pxor %%mm6, %%mm6\n"
1574 1575
1586 "pxor %%mm4, %%mm3\n\t" /* 0000F000 -> mm3 (~channel mask) */ 1587 "pxor %%mm4, %%mm3\n\t" /* 0000F000 -> mm3 (~channel mask) */
1587 1588
1588 /* get alpha channel shift */ 1589 /* get alpha channel shift */
1589 "movd %1, %%mm5\n\t" /* Ashift -> mm5 */ 1590 "movd %1, %%mm5\n\t" /* Ashift -> mm5 */
1590 1591
1591 : /* nothing */ : "m" (amask), "m" (ashift) ); 1592 : /* nothing */ : "rm" (amask), "rm" ((Uint32) sf->Ashift) );
1592 1593
1593 while(height--) { 1594 while(height--) {
1594 1595
1595 DUFFS_LOOP4({ 1596 DUFFS_LOOP4({
1596 Uint32 alpha; 1597 Uint32 alpha;