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74 lines
2.5 KiB
74 lines
2.5 KiB
gcc 3.3 is a bit too smart here, It optimizes these variables away. However
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movd to a mmx register only works from reg or mem.
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-jsaw
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--- SDL-1.2.6/src/video/SDL_RLEaccel.c 2003-08-30 21:13:06.000000000 +0200
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+++ SDL-1.2.6-rock/src/video/SDL_RLEaccel.c 2004-02-23 18:11:50.000000000 +0100
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@@ -143,7 +143,7 @@
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do { \
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Uint32 *srcp = (Uint32 *)(from); \
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Uint32 *dstp = (Uint32 *)(to); \
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- int i = 0x00FF00FF; \
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+ volatile int i = 0x00FF00FF; \
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movd_m2r(*(&i), mm3); \
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punpckldq_r2r(mm3, mm3); \
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i = 0xFF000000; \
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@@ -213,10 +213,11 @@
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#define ALPHA_BLIT16_565MMX(to, from, length, bpp, alpha) \
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do { \
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- int i, n = 0; \
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+ volatile int i; \
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+ int n = 0; \
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Uint16 *srcp = (Uint16 *)(from); \
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Uint16 *dstp = (Uint16 *)(to); \
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- Uint32 ALPHA = 0xF800; \
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+ volatile Uint32 ALPHA = 0xF800; \
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movd_m2r(*(&ALPHA), mm1); \
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punpcklwd_r2r(mm1, mm1); \
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punpcklwd_r2r(mm1, mm1); \
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@@ -229,7 +230,7 @@
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punpcklwd_r2r(mm7, mm7); \
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punpcklwd_r2r(mm7, mm7); \
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alpha &= ~(1+2+4); \
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- i = (Uint32)alpha | (Uint32)alpha << 16; \
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+ *(&i) = (Uint32)alpha | (Uint32)alpha << 16; \
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movd_m2r(*(&i), mm0); \
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punpckldq_r2r(mm0, mm0); \
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ALPHA = alpha >> 3; \
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@@ -303,10 +304,11 @@
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#define ALPHA_BLIT16_555MMX(to, from, length, bpp, alpha) \
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do { \
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- int i, n = 0; \
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+ volatile int i; \
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+ int n = 0; \
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Uint16 *srcp = (Uint16 *)(from); \
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Uint16 *dstp = (Uint16 *)(to); \
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- Uint32 ALPHA = 0x7C00; \
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+ volatile Uint32 ALPHA = 0x7C00; \
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movd_m2r(*(&ALPHA), mm1); \
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punpcklwd_r2r(mm1, mm1); \
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punpcklwd_r2r(mm1, mm1); \
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@@ -319,10 +321,10 @@
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punpcklwd_r2r(mm7, mm7); \
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punpcklwd_r2r(mm7, mm7); \
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alpha &= ~(1+2+4); \
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- i = (Uint32)alpha | (Uint32)alpha << 16; \
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+ *(&i) = (Uint32)alpha | (Uint32)alpha << 16; \
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movd_m2r(*(&i), mm0); \
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punpckldq_r2r(mm0, mm0); \
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- i = ((int)(length) & 3); \
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+ i = ((int)(length) & 3); \
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ALPHA = alpha >> 3; \
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for(; i > 0; --i) { \
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Uint32 s = *srcp++; \
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@@ -524,7 +526,7 @@
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do { \
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Uint32 *srcp = (Uint32 *)(from); \
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Uint32 *dstp = (Uint32 *)(to); \
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- int i = 0x00fefefe; \
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+ volatile int i = 0x00fefefe; \
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movd_m2r(*(&i), mm4); \
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punpckldq_r2r(mm4, mm4); \
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i = 0x00010101; \
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