From b63f641e9b2aeb0656288f8b16cea272ac890c22 Mon Sep 17 00:00:00 2001
From: Aurelien Jacobs <aurel@gnuage.org>
Date: Wed, 14 Jan 2009 00:13:56 +0000
Subject: Change semantic of CONFIG_*, HAVE_* and ARCH_*. They are now always
 defined to either 0 or 1.

Originally committed as revision 28311 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
---
 libswscale/rgb2rgb.c          |  32 +++++------
 libswscale/rgb2rgb_template.c | 122 +++++++++++++++++++++---------------------
 libswscale/swscale-example.c  |   4 +-
 libswscale/swscale.c          |  99 +++++++++++++++++++---------------
 libswscale/swscale_internal.h |  10 ++--
 libswscale/swscale_template.c |  86 ++++++++++++++---------------
 libswscale/yuv2rgb.c          |  22 ++++----
 libswscale/yuv2rgb_template.c |   6 +--
 8 files changed, 195 insertions(+), 186 deletions(-)

diff --git a/libswscale/rgb2rgb.c b/libswscale/rgb2rgb.c
index ac452a008a..5b79fea761 100644
--- a/libswscale/rgb2rgb.c
+++ b/libswscale/rgb2rgb.c
@@ -88,7 +88,7 @@ void (*yvu9_to_yuy2)(const uint8_t *src1, const uint8_t *src2, const uint8_t *sr
                      long srcStride1, long srcStride2,
                      long srcStride3, long dstStride);
 
-#if defined(ARCH_X86) && defined(CONFIG_GPL)
+#if ARCH_X86 && CONFIG_GPL
 DECLARE_ASM_CONST(8, uint64_t, mmx_null)     = 0x0000000000000000ULL;
 DECLARE_ASM_CONST(8, uint64_t, mmx_one)      = 0xFFFFFFFFFFFFFFFFULL;
 DECLARE_ASM_CONST(8, uint64_t, mask32b)      = 0x000000FF000000FFULL;
@@ -122,7 +122,7 @@ DECLARE_ASM_CONST(8, uint64_t, blue_16mask)  = 0x0000001f0000001fULL;
 DECLARE_ASM_CONST(8, uint64_t, red_15mask)   = 0x00007c0000007c00ULL;
 DECLARE_ASM_CONST(8, uint64_t, green_15mask) = 0x000003e0000003e0ULL;
 DECLARE_ASM_CONST(8, uint64_t, blue_15mask)  = 0x0000001f0000001fULL;
-#endif /* defined(ARCH_X86) */
+#endif /* ARCH_X86 */
 
 #define RGB2YUV_SHIFT 8
 #define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
@@ -141,35 +141,35 @@ DECLARE_ASM_CONST(8, uint64_t, blue_15mask)  = 0x0000001f0000001fULL;
 #undef HAVE_MMX2
 #undef HAVE_3DNOW
 #undef HAVE_SSE2
+#define HAVE_MMX 0
+#define HAVE_MMX2 0
+#define HAVE_3DNOW 0
+#define HAVE_SSE2 0
 #define RENAME(a) a ## _C
 #include "rgb2rgb_template.c"
 
-#if defined(ARCH_X86) && defined(CONFIG_GPL)
+#if ARCH_X86 && CONFIG_GPL
 
 //MMX versions
 #undef RENAME
-#define HAVE_MMX
-#undef HAVE_MMX2
-#undef HAVE_3DNOW
-#undef HAVE_SSE2
+#undef HAVE_MMX
+#define HAVE_MMX 1
 #define RENAME(a) a ## _MMX
 #include "rgb2rgb_template.c"
 
 //MMX2 versions
 #undef RENAME
-#define HAVE_MMX
-#define HAVE_MMX2
-#undef HAVE_3DNOW
-#undef HAVE_SSE2
+#undef HAVE_MMX2
+#define HAVE_MMX2 1
 #define RENAME(a) a ## _MMX2
 #include "rgb2rgb_template.c"
 
 //3DNOW versions
 #undef RENAME
-#define HAVE_MMX
 #undef HAVE_MMX2
-#define HAVE_3DNOW
-#undef HAVE_SSE2
+#undef HAVE_3DNOW
+#define HAVE_MMX2 0
+#define HAVE_3DNOW 1
 #define RENAME(a) a ## _3DNOW
 #include "rgb2rgb_template.c"
 
@@ -183,7 +183,7 @@ DECLARE_ASM_CONST(8, uint64_t, blue_15mask)  = 0x0000001f0000001fULL;
 */
 
 void sws_rgb2rgb_init(int flags){
-#if (defined(HAVE_MMX2) || defined(HAVE_3DNOW) || defined(HAVE_MMX))  && defined(CONFIG_GPL)
+#if (HAVE_MMX2 || HAVE_3DNOW || HAVE_MMX)  && CONFIG_GPL
     if (flags & SWS_CPU_CAPS_MMX2)
         rgb2rgb_init_MMX2();
     else if (flags & SWS_CPU_CAPS_3DNOW)
@@ -191,7 +191,7 @@ void sws_rgb2rgb_init(int flags){
     else if (flags & SWS_CPU_CAPS_MMX)
         rgb2rgb_init_MMX();
     else
-#endif /* defined(HAVE_MMX2) || defined(HAVE_3DNOW) || defined(HAVE_MMX) */
+#endif /* HAVE_MMX2 || HAVE_3DNOW || HAVE_MMX */
         rgb2rgb_init_C();
 }
 
diff --git a/libswscale/rgb2rgb_template.c b/libswscale/rgb2rgb_template.c
index ce76c5eb7e..b988ca0465 100644
--- a/libswscale/rgb2rgb_template.c
+++ b/libswscale/rgb2rgb_template.c
@@ -37,17 +37,17 @@
 #undef PREFETCHW
 #undef PAVGB
 
-#ifdef HAVE_SSE2
+#if HAVE_SSE2
 #define MMREG_SIZE 16
 #else
 #define MMREG_SIZE 8
 #endif
 
-#ifdef HAVE_3DNOW
+#if HAVE_3DNOW
 #define PREFETCH  "prefetch"
 #define PREFETCHW "prefetchw"
 #define PAVGB     "pavgusb"
-#elif defined (HAVE_MMX2)
+#elif HAVE_MMX2
 #define PREFETCH "prefetchnta"
 #define PREFETCHW "prefetcht0"
 #define PAVGB     "pavgb"
@@ -56,14 +56,14 @@
 #define PREFETCHW " # nop"
 #endif
 
-#ifdef HAVE_3DNOW
+#if HAVE_3DNOW
 /* On K6 femms is faster than emms. On K7 femms is directly mapped to emms. */
 #define EMMS     "femms"
 #else
 #define EMMS     "emms"
 #endif
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 #define MOVNTQ "movntq"
 #define SFENCE "sfence"
 #else
@@ -76,11 +76,11 @@ static inline void RENAME(rgb24tobgr32)(const uint8_t *src, uint8_t *dst, long s
     uint8_t *dest = dst;
     const uint8_t *s = src;
     const uint8_t *end;
-    #ifdef HAVE_MMX
+    #if HAVE_MMX
         const uint8_t *mm_end;
     #endif
     end = s + src_size;
-    #ifdef HAVE_MMX
+    #if HAVE_MMX
         __asm__ volatile(PREFETCH"    %0"::"m"(*s):"memory");
         mm_end = end - 23;
         __asm__ volatile("movq        %0, %%mm7"::"m"(mask32):"memory");
@@ -136,11 +136,11 @@ static inline void RENAME(rgb32tobgr24)(const uint8_t *src, uint8_t *dst, long s
     uint8_t *dest = dst;
     const uint8_t *s = src;
     const uint8_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint8_t *mm_end;
 #endif
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*s):"memory");
     mm_end = end - 31;
     while (s < mm_end)
@@ -230,7 +230,7 @@ static inline void RENAME(rgb15to16)(const uint8_t *src, uint8_t *dst, long src_
     register const uint8_t *end;
     const uint8_t *mm_end;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*s));
     __asm__ volatile("movq        %0, %%mm4"::"m"(mask15s));
     mm_end = end - 15;
@@ -279,7 +279,7 @@ static inline void RENAME(rgb16to15)(const uint8_t *src, uint8_t *dst, long src_
     register const uint8_t *end;
     const uint8_t *mm_end;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*s));
     __asm__ volatile("movq        %0, %%mm7"::"m"(mask15rg));
     __asm__ volatile("movq        %0, %%mm6"::"m"(mask15b));
@@ -332,12 +332,12 @@ static inline void RENAME(rgb32to16)(const uint8_t *src, uint8_t *dst, long src_
 {
     const uint8_t *s = src;
     const uint8_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint8_t *mm_end;
 #endif
     uint16_t *d = (uint16_t *)dst;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     mm_end = end - 15;
 #if 1 //is faster only if multiplies are reasonably fast (FIXME figure out on which CPUs this is faster, on Athlon it is slightly faster)
     __asm__ volatile(
@@ -430,12 +430,12 @@ static inline void RENAME(rgb32tobgr16)(const uint8_t *src, uint8_t *dst, long s
 {
     const uint8_t *s = src;
     const uint8_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint8_t *mm_end;
 #endif
     uint16_t *d = (uint16_t *)dst;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*src):"memory");
     __asm__ volatile(
         "movq          %0, %%mm7    \n\t"
@@ -491,12 +491,12 @@ static inline void RENAME(rgb32to15)(const uint8_t *src, uint8_t *dst, long src_
 {
     const uint8_t *s = src;
     const uint8_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint8_t *mm_end;
 #endif
     uint16_t *d = (uint16_t *)dst;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     mm_end = end - 15;
 #if 1 //is faster only if multiplies are reasonably fast (FIXME figure out on which CPUs this is faster, on Athlon it is slightly faster)
     __asm__ volatile(
@@ -589,12 +589,12 @@ static inline void RENAME(rgb32tobgr15)(const uint8_t *src, uint8_t *dst, long s
 {
     const uint8_t *s = src;
     const uint8_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint8_t *mm_end;
 #endif
     uint16_t *d = (uint16_t *)dst;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*src):"memory");
     __asm__ volatile(
         "movq          %0, %%mm7    \n\t"
@@ -650,12 +650,12 @@ static inline void RENAME(rgb24tobgr16)(const uint8_t *src, uint8_t *dst, long s
 {
     const uint8_t *s = src;
     const uint8_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint8_t *mm_end;
 #endif
     uint16_t *d = (uint16_t *)dst;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*src):"memory");
     __asm__ volatile(
         "movq         %0, %%mm7     \n\t"
@@ -713,12 +713,12 @@ static inline void RENAME(rgb24to16)(const uint8_t *src, uint8_t *dst, long src_
 {
     const uint8_t *s = src;
     const uint8_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint8_t *mm_end;
 #endif
     uint16_t *d = (uint16_t *)dst;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*src):"memory");
     __asm__ volatile(
         "movq         %0, %%mm7     \n\t"
@@ -776,12 +776,12 @@ static inline void RENAME(rgb24tobgr15)(const uint8_t *src, uint8_t *dst, long s
 {
     const uint8_t *s = src;
     const uint8_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint8_t *mm_end;
 #endif
     uint16_t *d = (uint16_t *)dst;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*src):"memory");
     __asm__ volatile(
         "movq          %0, %%mm7    \n\t"
@@ -839,12 +839,12 @@ static inline void RENAME(rgb24to15)(const uint8_t *src, uint8_t *dst, long src_
 {
     const uint8_t *s = src;
     const uint8_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint8_t *mm_end;
 #endif
     uint16_t *d = (uint16_t *)dst;
     end = s + src_size;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*src):"memory");
     __asm__ volatile(
         "movq         %0, %%mm7     \n\t"
@@ -922,13 +922,13 @@ static inline void RENAME(rgb24to15)(const uint8_t *src, uint8_t *dst, long src_
 static inline void RENAME(rgb15tobgr24)(const uint8_t *src, uint8_t *dst, long src_size)
 {
     const uint16_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint16_t *mm_end;
 #endif
     uint8_t *d = dst;
     const uint16_t *s = (const uint16_t*)src;
     end = s + src_size/2;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*s):"memory");
     mm_end = end - 7;
     while (s < mm_end)
@@ -1064,13 +1064,13 @@ static inline void RENAME(rgb15tobgr24)(const uint8_t *src, uint8_t *dst, long s
 static inline void RENAME(rgb16tobgr24)(const uint8_t *src, uint8_t *dst, long src_size)
 {
     const uint16_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint16_t *mm_end;
 #endif
     uint8_t *d = (uint8_t *)dst;
     const uint16_t *s = (const uint16_t *)src;
     end = s + src_size/2;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*s):"memory");
     mm_end = end - 7;
     while (s < mm_end)
@@ -1205,13 +1205,13 @@ static inline void RENAME(rgb16tobgr24)(const uint8_t *src, uint8_t *dst, long s
 static inline void RENAME(rgb15to32)(const uint8_t *src, uint8_t *dst, long src_size)
 {
     const uint16_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint16_t *mm_end;
 #endif
     uint8_t *d = dst;
     const uint16_t *s = (const uint16_t *)src;
     end = s + src_size/2;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*s):"memory");
     __asm__ volatile("pxor    %%mm7,%%mm7    \n\t":::"memory");
     mm_end = end - 3;
@@ -1283,13 +1283,13 @@ static inline void RENAME(rgb15to32)(const uint8_t *src, uint8_t *dst, long src_
 static inline void RENAME(rgb16to32)(const uint8_t *src, uint8_t *dst, long src_size)
 {
     const uint16_t *end;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     const uint16_t *mm_end;
 #endif
     uint8_t *d = dst;
     const uint16_t *s = (const uint16_t*)src;
     end = s + src_size/2;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(PREFETCH"    %0"::"m"(*s):"memory");
     __asm__ volatile("pxor    %%mm7,%%mm7    \n\t":::"memory");
     mm_end = end - 3;
@@ -1357,7 +1357,7 @@ static inline void RENAME(rgb32tobgr32)(const uint8_t *src, uint8_t *dst, long s
     long idx = 15 - src_size;
     const uint8_t *s = src-idx;
     uint8_t *d = dst-idx;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(
     "test          %0, %0           \n\t"
     "jns           2f               \n\t"
@@ -1371,7 +1371,7 @@ static inline void RENAME(rgb32tobgr32)(const uint8_t *src, uint8_t *dst, long s
     PREFETCH"     32(%1, %0)        \n\t"
     "movq           (%1, %0), %%mm0 \n\t"
     "movq          8(%1, %0), %%mm1 \n\t"
-# ifdef HAVE_MMX2
+# if HAVE_MMX2
     "pshufw      $177, %%mm0, %%mm3 \n\t"
     "pshufw      $177, %%mm1, %%mm5 \n\t"
     "pand       %%mm7, %%mm0        \n\t"
@@ -1419,7 +1419,7 @@ static inline void RENAME(rgb32tobgr32)(const uint8_t *src, uint8_t *dst, long s
 static inline void RENAME(rgb24tobgr24)(const uint8_t *src, uint8_t *dst, long src_size)
 {
     unsigned i;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     long mmx_size= 23 - src_size;
     __asm__ volatile (
     "test             %%"REG_a", %%"REG_a"          \n\t"
@@ -1494,7 +1494,7 @@ static inline void RENAME(yuvPlanartoyuy2)(const uint8_t *ysrc, const uint8_t *u
     const long chromWidth= width>>1;
     for (y=0; y<height; y++)
     {
-#ifdef HAVE_MMX
+#if HAVE_MMX
 //FIXME handle 2 lines at once (fewer prefetches, reuse some chroma, but very likely memory-limited anyway)
         __asm__ volatile(
         "xor                 %%"REG_a", %%"REG_a"   \n\t"
@@ -1531,7 +1531,7 @@ static inline void RENAME(yuvPlanartoyuy2)(const uint8_t *ysrc, const uint8_t *u
         );
 #else
 
-#if defined ARCH_ALPHA && defined HAVE_MVI
+#if ARCH_ALPHA && HAVE_MVI
 #define pl2yuy2(n)                  \
     y1 = yc[n];                     \
     y2 = yc2[n];                    \
@@ -1619,7 +1619,7 @@ static inline void RENAME(yuvPlanartoyuy2)(const uint8_t *ysrc, const uint8_t *u
         ysrc += lumStride;
         dst  += dstStride;
     }
-#ifdef HAVE_MMX
+#if HAVE_MMX
 __asm__(    EMMS"       \n\t"
         SFENCE"     \n\t"
         :::"memory");
@@ -1646,7 +1646,7 @@ static inline void RENAME(yuvPlanartouyvy)(const uint8_t *ysrc, const uint8_t *u
     const long chromWidth= width>>1;
     for (y=0; y<height; y++)
     {
-#ifdef HAVE_MMX
+#if HAVE_MMX
 //FIXME handle 2 lines at once (fewer prefetches, reuse some chroma, but very likely memory-limited anyway)
         __asm__ volatile(
         "xor                %%"REG_a", %%"REG_a"    \n\t"
@@ -1725,7 +1725,7 @@ static inline void RENAME(yuvPlanartouyvy)(const uint8_t *ysrc, const uint8_t *u
         ysrc += lumStride;
         dst += dstStride;
     }
-#ifdef HAVE_MMX
+#if HAVE_MMX
 __asm__(    EMMS"       \n\t"
         SFENCE"     \n\t"
         :::"memory");
@@ -1776,7 +1776,7 @@ static inline void RENAME(yuy2toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t
     const long chromWidth= width>>1;
     for (y=0; y<height; y+=2)
     {
-#ifdef HAVE_MMX
+#if HAVE_MMX
         __asm__ volatile(
         "xor                 %%"REG_a", %%"REG_a"   \n\t"
         "pcmpeqw                 %%mm7, %%mm7       \n\t"
@@ -1881,7 +1881,7 @@ static inline void RENAME(yuy2toyv12)(const uint8_t *src, uint8_t *ydst, uint8_t
         ydst += lumStride;
         src  += srcStride;
     }
-#ifdef HAVE_MMX
+#if HAVE_MMX
 __asm__ volatile(   EMMS"       \n\t"
                 SFENCE"     \n\t"
                 :::"memory");
@@ -1914,7 +1914,7 @@ static inline void RENAME(planar2x)(const uint8_t *src, uint8_t *dst, long srcWi
         dst+= dstStride;
 
     for (y=1; y<srcHeight; y++){
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
         const long mmxSize= srcWidth&~15;
         __asm__ volatile(
         "mov           %4, %%"REG_a"            \n\t"
@@ -1993,7 +1993,7 @@ static inline void RENAME(planar2x)(const uint8_t *src, uint8_t *dst, long srcWi
     }
 #endif
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
 __asm__ volatile(   EMMS"       \n\t"
                 SFENCE"     \n\t"
                 :::"memory");
@@ -2014,7 +2014,7 @@ static inline void RENAME(uyvytoyv12)(const uint8_t *src, uint8_t *ydst, uint8_t
     const long chromWidth= width>>1;
     for (y=0; y<height; y+=2)
     {
-#ifdef HAVE_MMX
+#if HAVE_MMX
         __asm__ volatile(
         "xor                 %%"REG_a", %%"REG_a"   \n\t"
         "pcmpeqw             %%mm7, %%mm7   \n\t"
@@ -2119,7 +2119,7 @@ static inline void RENAME(uyvytoyv12)(const uint8_t *src, uint8_t *ydst, uint8_t
         ydst += lumStride;
         src  += srcStride;
     }
-#ifdef HAVE_MMX
+#if HAVE_MMX
 __asm__ volatile(   EMMS"       \n\t"
                 SFENCE"     \n\t"
                 :::"memory");
@@ -2139,7 +2139,7 @@ static inline void RENAME(rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_
 {
     long y;
     const long chromWidth= width>>1;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     for (y=0; y<height-2; y+=2)
     {
         long i;
@@ -2229,7 +2229,7 @@ static inline void RENAME(rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_
         "1:                                         \n\t"
         PREFETCH"    64(%0, %%"REG_d")              \n\t"
         PREFETCH"    64(%1, %%"REG_d")              \n\t"
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
         "movq          (%0, %%"REG_d"), %%mm0       \n\t"
         "movq          (%1, %%"REG_d"), %%mm1       \n\t"
         "movq         6(%0, %%"REG_d"), %%mm2       \n\t"
@@ -2290,7 +2290,7 @@ static inline void RENAME(rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_
         "packssdw                %%mm1, %%mm0       \n\t" // V1 V0 U1 U0
         "psraw                      $7, %%mm0       \n\t"
 
-#if defined (HAVE_MMX2) || defined (HAVE_3DNOW)
+#if HAVE_MMX2 || HAVE_3DNOW
         "movq        12(%0, %%"REG_d"), %%mm4       \n\t"
         "movq        12(%1, %%"REG_d"), %%mm1       \n\t"
         "movq        18(%0, %%"REG_d"), %%mm2       \n\t"
@@ -2438,8 +2438,8 @@ static void RENAME(interleaveBytes)(uint8_t *src1, uint8_t *src2, uint8_t *dest,
     {
         long w;
 
-#ifdef HAVE_MMX
-#ifdef HAVE_SSE2
+#if HAVE_MMX
+#if HAVE_SSE2
         __asm__(
         "xor              %%"REG_a", %%"REG_a"  \n\t"
         "1:                                     \n\t"
@@ -2501,7 +2501,7 @@ static void RENAME(interleaveBytes)(uint8_t *src1, uint8_t *src2, uint8_t *dest,
                 src1 += src1Stride;
                 src2 += src2Stride;
     }
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__(
         EMMS"       \n\t"
         SFENCE"     \n\t"
@@ -2518,7 +2518,7 @@ static inline void RENAME(vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
 {
     long y,x,w,h;
     w=width/2; h=height/2;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(
     PREFETCH" %0    \n\t"
     PREFETCH" %1    \n\t"
@@ -2528,7 +2528,7 @@ static inline void RENAME(vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
     const uint8_t* s1=src1+srcStride1*(y>>1);
     uint8_t* d=dst1+dstStride1*y;
     x=0;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     for (;x<w-31;x+=32)
     {
         __asm__ volatile(
@@ -2568,7 +2568,7 @@ static inline void RENAME(vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
     const uint8_t* s2=src2+srcStride2*(y>>1);
     uint8_t* d=dst2+dstStride2*y;
     x=0;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     for (;x<w-31;x+=32)
     {
         __asm__ volatile(
@@ -2604,7 +2604,7 @@ static inline void RENAME(vu9_to_vu12)(const uint8_t *src1, const uint8_t *src2,
 #endif
     for (;x<w;x++) d[2*x]=d[2*x+1]=s2[x];
     }
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__(
         EMMS"       \n\t"
         SFENCE"     \n\t"
@@ -2627,7 +2627,7 @@ static inline void RENAME(yvu9_to_yuy2)(const uint8_t *src1, const uint8_t *src2
     const uint8_t* vp=src3+srcStride3*(y>>2);
     uint8_t* d=dst+dstStride*y;
     x=0;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     for (;x<w-7;x+=8)
     {
         __asm__ volatile(
@@ -2695,7 +2695,7 @@ static inline void RENAME(yvu9_to_yuy2)(const uint8_t *src1, const uint8_t *src2
         d[8*x+7] = vp[x];
     }
     }
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__(
         EMMS"       \n\t"
         SFENCE"     \n\t"
diff --git a/libswscale/swscale-example.c b/libswscale/swscale-example.c
index d1189b2745..90c3ce39ab 100644
--- a/libswscale/swscale-example.c
+++ b/libswscale/swscale-example.c
@@ -118,7 +118,7 @@ static int doTest(uint8_t *ref[3], int refStride[3], int w, int h, int srcFormat
     sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
     sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
 
-#if defined(ARCH_X86)
+#if ARCH_X86
     __asm__ volatile ("emms\n\t");
 #endif
 
@@ -208,7 +208,7 @@ int main(int argc, char **argv){
     }
     sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
 
-#if defined(ARCH_X86)
+#if ARCH_X86
     __asm__ volatile ("emms\n\t");
 #endif
 
diff --git a/libswscale/swscale.c b/libswscale/swscale.c
index cfa3580cbc..8ee363fafc 100644
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@@ -62,7 +62,7 @@ untested special converters
 #include <unistd.h>
 #include "config.h"
 #include <assert.h>
-#ifdef HAVE_SYS_MMAN_H
+#if HAVE_SYS_MMAN_H
 #include <sys/mman.h>
 #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
 #define MAP_ANONYMOUS MAP_ANON
@@ -202,7 +202,7 @@ add BGR4 output support
 write special BGR->BGR scaler
 */
 
-#if defined(ARCH_X86) && defined (CONFIG_GPL)
+#if ARCH_X86 && CONFIG_GPL
 DECLARE_ASM_CONST(8, uint64_t, bF8)=       0xF8F8F8F8F8F8F8F8LL;
 DECLARE_ASM_CONST(8, uint64_t, bFC)=       0xFCFCFCFCFCFCFCFCLL;
 DECLARE_ASM_CONST(8, uint64_t, w10)=       0x0010001000100010LL;
@@ -257,7 +257,7 @@ DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toUV[2][4]) = {
 
 DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toUVOffset)= 0x0040400000404000ULL;
 
-#endif /* defined(ARCH_X86) */
+#endif /* ARCH_X86 */
 
 // clipping helper table for C implementations:
 static unsigned char clip_table[768];
@@ -947,27 +947,27 @@ static inline void yuv2rgbXinC_full(SwsContext *c, int16_t *lumFilter, int16_t *
 
 //Note: we have C, X86, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one
 //Plain C versions
-#if !defined (HAVE_MMX) || defined (RUNTIME_CPUDETECT) || !defined(CONFIG_GPL)
+#if !HAVE_MMX || defined (RUNTIME_CPUDETECT) || !CONFIG_GPL
 #define COMPILE_C
 #endif
 
-#ifdef ARCH_PPC
-#if (defined (HAVE_ALTIVEC) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
+#if ARCH_PPC
+#if (HAVE_ALTIVEC || defined (RUNTIME_CPUDETECT)) && CONFIG_GPL
 #define COMPILE_ALTIVEC
 #endif //HAVE_ALTIVEC
 #endif //ARCH_PPC
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 
-#if ((defined (HAVE_MMX) && !defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
+#if ((HAVE_MMX && !HAVE_3DNOW && !HAVE_MMX2) || defined (RUNTIME_CPUDETECT)) && CONFIG_GPL
 #define COMPILE_MMX
 #endif
 
-#if (defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
+#if (HAVE_MMX2 || defined (RUNTIME_CPUDETECT)) && CONFIG_GPL
 #define COMPILE_MMX2
 #endif
 
-#if ((defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
+#if ((HAVE_3DNOW && !HAVE_MMX2) || defined (RUNTIME_CPUDETECT)) && CONFIG_GPL
 #define COMPILE_3DNOW
 #endif
 #endif //ARCH_X86 || ARCH_X86_64
@@ -975,24 +975,26 @@ static inline void yuv2rgbXinC_full(SwsContext *c, int16_t *lumFilter, int16_t *
 #undef HAVE_MMX
 #undef HAVE_MMX2
 #undef HAVE_3DNOW
+#undef HAVE_ALTIVEC
+#define HAVE_MMX 0
+#define HAVE_MMX2 0
+#define HAVE_3DNOW 0
+#define HAVE_ALTIVEC 0
 
 #ifdef COMPILE_C
-#undef HAVE_MMX
-#undef HAVE_MMX2
-#undef HAVE_3DNOW
-#undef HAVE_ALTIVEC
 #define RENAME(a) a ## _C
 #include "swscale_template.c"
 #endif
 
 #ifdef COMPILE_ALTIVEC
 #undef RENAME
-#define HAVE_ALTIVEC
+#undef HAVE_ALTIVEC
+#define HAVE_ALTIVEC 1
 #define RENAME(a) a ## _altivec
 #include "swscale_template.c"
 #endif
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 
 //X86 versions
 /*
@@ -1007,9 +1009,12 @@ static inline void yuv2rgbXinC_full(SwsContext *c, int16_t *lumFilter, int16_t *
 //MMX versions
 #ifdef COMPILE_MMX
 #undef RENAME
-#define HAVE_MMX
+#undef HAVE_MMX
 #undef HAVE_MMX2
 #undef HAVE_3DNOW
+#define HAVE_MMX 1
+#define HAVE_MMX2 0
+#define HAVE_3DNOW 0
 #define RENAME(a) a ## _MMX
 #include "swscale_template.c"
 #endif
@@ -1017,9 +1022,12 @@ static inline void yuv2rgbXinC_full(SwsContext *c, int16_t *lumFilter, int16_t *
 //MMX2 versions
 #ifdef COMPILE_MMX2
 #undef RENAME
-#define HAVE_MMX
-#define HAVE_MMX2
+#undef HAVE_MMX
+#undef HAVE_MMX2
 #undef HAVE_3DNOW
+#define HAVE_MMX 1
+#define HAVE_MMX2 1
+#define HAVE_3DNOW 0
 #define RENAME(a) a ## _MMX2
 #include "swscale_template.c"
 #endif
@@ -1027,9 +1035,12 @@ static inline void yuv2rgbXinC_full(SwsContext *c, int16_t *lumFilter, int16_t *
 //3DNOW versions
 #ifdef COMPILE_3DNOW
 #undef RENAME
-#define HAVE_MMX
+#undef HAVE_MMX
 #undef HAVE_MMX2
-#define HAVE_3DNOW
+#undef HAVE_3DNOW
+#define HAVE_MMX 1
+#define HAVE_MMX2 0
+#define HAVE_3DNOW 1
 #define RENAME(a) a ## _3DNow
 #include "swscale_template.c"
 #endif
@@ -1061,7 +1072,7 @@ static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outF
     int64_t *filter2=NULL;
     const int64_t fone= 1LL<<54;
     int ret= -1;
-#if defined(ARCH_X86)
+#if ARCH_X86
     if (flags & SWS_CPU_CAPS_MMX)
         __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)
 #endif
@@ -1617,8 +1628,8 @@ static void globalInit(void){
 
 static SwsFunc getSwsFunc(int flags){
 
-#if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)
-#if defined(ARCH_X86)
+#if defined(RUNTIME_CPUDETECT) && CONFIG_GPL
+#if ARCH_X86
     // ordered per speed fastest first
     if (flags & SWS_CPU_CAPS_MMX2)
         return swScale_MMX2;
@@ -1630,22 +1641,22 @@ static SwsFunc getSwsFunc(int flags){
         return swScale_C;
 
 #else
-#ifdef ARCH_PPC
+#if ARCH_PPC
     if (flags & SWS_CPU_CAPS_ALTIVEC)
         return swScale_altivec;
     else
         return swScale_C;
 #endif
     return swScale_C;
-#endif /* defined(ARCH_X86) */
+#endif /* ARCH_X86 */
 #else //RUNTIME_CPUDETECT
-#ifdef HAVE_MMX2
+#if   HAVE_MMX2
     return swScale_MMX2;
-#elif defined (HAVE_3DNOW)
+#elif HAVE_3DNOW
     return swScale_3DNow;
-#elif defined (HAVE_MMX)
+#elif HAVE_MMX
     return swScale_MMX;
-#elif defined (HAVE_ALTIVEC)
+#elif HAVE_ALTIVEC
     return swScale_altivec;
 #else
     return swScale_C;
@@ -2169,22 +2180,22 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int d
     int unscaled, needsDither;
     int srcRange, dstRange;
     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
-#if defined(ARCH_X86)
+#if ARCH_X86
     if (flags & SWS_CPU_CAPS_MMX)
         __asm__ volatile("emms\n\t"::: "memory");
 #endif
 
-#if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off
+#if !defined(RUNTIME_CPUDETECT) || !CONFIG_GPL //ensure that the flags match the compiled variant if cpudetect is off
     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);
-#ifdef HAVE_MMX2
+#if   HAVE_MMX2
     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;
-#elif defined (HAVE_3DNOW)
+#elif HAVE_3DNOW
     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;
-#elif defined (HAVE_MMX)
+#elif HAVE_MMX
     flags |= SWS_CPU_CAPS_MMX;
-#elif defined (HAVE_ALTIVEC)
+#elif HAVE_ALTIVEC
     flags |= SWS_CPU_CAPS_ALTIVEC;
-#elif defined (ARCH_BFIN)
+#elif ARCH_BFIN
     flags |= SWS_CPU_CAPS_BFIN;
 #endif
 #endif /* RUNTIME_CPUDETECT */
@@ -2311,7 +2322,7 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int d
         {
             c->swScale= PlanarToNV12Wrapper;
         }
-#ifdef CONFIG_GPL
+#if CONFIG_GPL
         /* yuv2bgr */
         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat))
             && !(flags & SWS_ACCURATE_RND) && !(dstH&1))
@@ -2410,7 +2421,7 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int d
             c->swScale= gray16swap;
         }
 
-#ifdef ARCH_BFIN
+#if ARCH_BFIN
         if (flags & SWS_CPU_CAPS_BFIN)
             ff_bfin_get_unscaled_swscale (c);
 #endif
@@ -2518,7 +2529,7 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int d
                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
                    srcFilter->chrV, dstFilter->chrV, c->param);
 
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);
         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);
 
@@ -2648,7 +2659,7 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int d
         }
         else
         {
-#if defined(ARCH_X86)
+#if ARCH_X86
             av_log(c, AV_LOG_VERBOSE, "using X86-Asm scaler for horizontal scaling\n");
 #else
             if (flags & SWS_FAST_BILINEAR)
@@ -3115,7 +3126,7 @@ void sws_freeContext(SwsContext *c){
     av_freep(&c->vChrFilter);
     av_freep(&c->hLumFilter);
     av_freep(&c->hChrFilter);
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
     av_freep(&c->vYCoeffsBank);
     av_freep(&c->vCCoeffsBank);
 #endif
@@ -3125,7 +3136,7 @@ void sws_freeContext(SwsContext *c){
     av_freep(&c->hLumFilterPos);
     av_freep(&c->hChrFilterPos);
 
-#if defined(ARCH_X86) && defined(CONFIG_GPL)
+#if ARCH_X86 && CONFIG_GPL
 #ifdef MAP_ANONYMOUS
     if (c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);
     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);
@@ -3135,7 +3146,7 @@ void sws_freeContext(SwsContext *c){
 #endif
     c->funnyYCode=NULL;
     c->funnyUVCode=NULL;
-#endif /* defined(ARCH_X86) */
+#endif /* ARCH_X86 */
 
     av_freep(&c->lumMmx2Filter);
     av_freep(&c->chrMmx2Filter);
diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index 48995571e0..b2505c0f7d 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -23,7 +23,7 @@
 
 #include "config.h"
 
-#ifdef HAVE_ALTIVEC_H
+#if HAVE_ALTIVEC_H
 #include <altivec.h>
 #endif
 
@@ -42,7 +42,7 @@
 #define ALT32_CORR   1
 #endif
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 #   define APCK_PTR2 8
 #   define APCK_COEF 16
 #   define APCK_SIZE 24
@@ -175,7 +175,7 @@ typedef struct SwsContext{
     uint64_t u_temp       __attribute__((aligned(8)));
     uint64_t v_temp       __attribute__((aligned(8)));
 
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
 
   vector signed short   CY;
   vector signed short   CRV;
@@ -189,7 +189,7 @@ typedef struct SwsContext{
 #endif
 
 
-#ifdef ARCH_BFIN
+#if ARCH_BFIN
     uint32_t oy           __attribute__((aligned(4)));
     uint32_t oc           __attribute__((aligned(4)));
     uint32_t zero         __attribute__((aligned(4)));
@@ -203,7 +203,7 @@ typedef struct SwsContext{
     uint32_t gmask        __attribute__((aligned(4)));
 #endif
 
-#ifdef HAVE_VIS
+#if HAVE_VIS
     uint64_t sparc_coeffs[10] __attribute__((aligned(8)));
 #endif
 
diff --git a/libswscale/swscale_template.c b/libswscale/swscale_template.c
index 4c8bc6e066..2144b5a57c 100644
--- a/libswscale/swscale_template.c
+++ b/libswscale/swscale_template.c
@@ -29,17 +29,17 @@
 #undef EMMS
 #undef SFENCE
 
-#ifdef HAVE_3DNOW
+#if HAVE_3DNOW
 /* On K6 femms is faster than emms. On K7 femms is directly mapped to emms. */
 #define EMMS     "femms"
 #else
 #define EMMS     "emms"
 #endif
 
-#ifdef HAVE_3DNOW
+#if HAVE_3DNOW
 #define PREFETCH  "prefetch"
 #define PREFETCHW "prefetchw"
-#elif defined (HAVE_MMX2)
+#elif HAVE_MMX2
 #define PREFETCH "prefetchnta"
 #define PREFETCHW "prefetcht0"
 #else
@@ -47,26 +47,26 @@
 #define PREFETCHW " # nop"
 #endif
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 #define SFENCE "sfence"
 #else
 #define SFENCE " # nop"
 #endif
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 #define PAVGB(a,b) "pavgb " #a ", " #b " \n\t"
-#elif defined (HAVE_3DNOW)
+#elif HAVE_3DNOW
 #define PAVGB(a,b) "pavgusb " #a ", " #b " \n\t"
 #endif
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 #define REAL_MOVNTQ(a,b) "movntq " #a ", " #b " \n\t"
 #else
 #define REAL_MOVNTQ(a,b) "movq " #a ", " #b " \n\t"
 #endif
 #define MOVNTQ(a,b)  REAL_MOVNTQ(a,b)
 
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
 #include "swscale_altivec_template.c"
 #endif
 
@@ -865,7 +865,7 @@
     "cmp  "#dstw", "#index"     \n\t"\
     " jb       1b               \n\t"
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 #undef WRITEBGR24
 #define WRITEBGR24(dst, dstw, index)  WRITEBGR24MMX2(dst, dstw, index)
 #else
@@ -895,7 +895,7 @@ static inline void RENAME(yuv2yuvX)(SwsContext *c, int16_t *lumFilter, int16_t *
                                     int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
                                     uint8_t *dest, uint8_t *uDest, uint8_t *vDest, long dstW, long chrDstW)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     if(!(c->flags & SWS_BITEXACT)){
         if (c->flags & SWS_ACCURATE_RND){
             if (uDest){
@@ -915,7 +915,7 @@ static inline void RENAME(yuv2yuvX)(SwsContext *c, int16_t *lumFilter, int16_t *
         return;
     }
 #endif
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
 yuv2yuvX_altivec_real(lumFilter, lumSrc, lumFilterSize,
                       chrFilter, chrSrc, chrFilterSize,
                       dest, uDest, vDest, dstW, chrDstW);
@@ -939,7 +939,7 @@ static inline void RENAME(yuv2yuv1)(SwsContext *c, int16_t *lumSrc, int16_t *chr
                                     uint8_t *dest, uint8_t *uDest, uint8_t *vDest, long dstW, long chrDstW)
 {
     int i;
-#ifdef HAVE_MMX
+#if HAVE_MMX
     if(!(c->flags & SWS_BITEXACT)){
         long p= uDest ? 3 : 1;
         uint8_t *src[3]= {lumSrc + dstW, chrSrc + chrDstW, chrSrc + VOFW + chrDstW};
@@ -1006,7 +1006,7 @@ static inline void RENAME(yuv2packedX)(SwsContext *c, int16_t *lumFilter, int16_
                                        int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
                                        uint8_t *dest, long dstW, long dstY)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     long dummy=0;
     if(!(c->flags & SWS_BITEXACT)){
         if (c->flags & SWS_ACCURATE_RND){
@@ -1133,7 +1133,7 @@ static inline void RENAME(yuv2packedX)(SwsContext *c, int16_t *lumFilter, int16_
         }
     }
 #endif /* HAVE_MMX */
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
     /* The following list of supported dstFormat values should
        match what's found in the body of altivec_yuv2packedX() */
     if (c->dstFormat==PIX_FMT_ABGR  || c->dstFormat==PIX_FMT_BGRA  ||
@@ -1159,7 +1159,7 @@ static inline void RENAME(yuv2packed2)(SwsContext *c, uint16_t *buf0, uint16_t *
     int uvalpha1=4095-uvalpha;
     int i;
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
     if(!(c->flags & SWS_BITEXACT)){
         switch(c->dstFormat)
         {
@@ -1270,7 +1270,7 @@ static inline void RENAME(yuv2packed1)(SwsContext *c, uint16_t *buf0, uint16_t *
         return;
     }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
     if(!(flags & SWS_BITEXACT)){
         if (uvalpha < 2048) // note this is not correct (shifts chrominance by 0.5 pixels) but it is a bit faster
         {
@@ -1464,7 +1464,7 @@ static inline void RENAME(yuv2packed1)(SwsContext *c, uint16_t *buf0, uint16_t *
 
 static inline void RENAME(yuy2ToY)(uint8_t *dst, uint8_t *src, long width, uint32_t *unused)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(
     "movq "MANGLE(bm01010101)", %%mm2           \n\t"
     "mov                    %0, %%"REG_a"       \n\t"
@@ -1489,7 +1489,7 @@ static inline void RENAME(yuy2ToY)(uint8_t *dst, uint8_t *src, long width, uint3
 
 static inline void RENAME(yuy2ToUV)(uint8_t *dstU, uint8_t *dstV, uint8_t *src1, uint8_t *src2, long width, uint32_t *unused)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(
     "movq "MANGLE(bm01010101)", %%mm4           \n\t"
     "mov                    %0, %%"REG_a"       \n\t"
@@ -1526,7 +1526,7 @@ static inline void RENAME(yuy2ToUV)(uint8_t *dstU, uint8_t *dstV, uint8_t *src1,
  * yuy2ToY/UV)(dst, src+1, ...) would have 100% unaligned accesses. */
 static inline void RENAME(uyvyToY)(uint8_t *dst, uint8_t *src, long width, uint32_t *unused)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(
     "mov                  %0, %%"REG_a"         \n\t"
     "1:                                         \n\t"
@@ -1550,7 +1550,7 @@ static inline void RENAME(uyvyToY)(uint8_t *dst, uint8_t *src, long width, uint3
 
 static inline void RENAME(uyvyToUV)(uint8_t *dstU, uint8_t *dstV, uint8_t *src1, uint8_t *src2, long width, uint32_t *unused)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(
     "movq "MANGLE(bm01010101)", %%mm4           \n\t"
     "mov                    %0, %%"REG_a"       \n\t"
@@ -1643,7 +1643,7 @@ BGR2UV(uint16_t, bgr15ToUV, 0, 0, 0, 0x001F, 0x03E0, 0x7C00, RU<<10, GU<<5, BU
 BGR2UV(uint16_t, rgb16ToUV, 0, 0, 0, 0xF800, 0x07E0, 0x001F, RU    , GU<<5, BU<<11, RV    , GV<<5, BV<<11, RGB2YUV_SHIFT+8)
 BGR2UV(uint16_t, rgb15ToUV, 0, 0, 0, 0x7C00, 0x03E0, 0x001F, RU    , GU<<5, BU<<10, RV    , GV<<5, BV<<10, RGB2YUV_SHIFT+7)
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
 static inline void RENAME(bgr24ToY_mmx)(uint8_t *dst, uint8_t *src, long width, int srcFormat)
 {
 
@@ -1758,7 +1758,7 @@ static inline void RENAME(bgr24ToUV_mmx)(uint8_t *dstU, uint8_t *dstV, uint8_t *
 
 static inline void RENAME(bgr24ToY)(uint8_t *dst, uint8_t *src, long width, uint32_t *unused)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     RENAME(bgr24ToY_mmx)(dst, src, width, PIX_FMT_BGR24);
 #else
     int i;
@@ -1775,7 +1775,7 @@ static inline void RENAME(bgr24ToY)(uint8_t *dst, uint8_t *src, long width, uint
 
 static inline void RENAME(bgr24ToUV)(uint8_t *dstU, uint8_t *dstV, uint8_t *src1, uint8_t *src2, long width, uint32_t *unused)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     RENAME(bgr24ToUV_mmx)(dstU, dstV, src1, width, PIX_FMT_BGR24);
 #else
     int i;
@@ -1809,7 +1809,7 @@ static inline void RENAME(bgr24ToUV_half)(uint8_t *dstU, uint8_t *dstV, uint8_t
 
 static inline void RENAME(rgb24ToY)(uint8_t *dst, uint8_t *src, long width, uint32_t *unused)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     RENAME(bgr24ToY_mmx)(dst, src, width, PIX_FMT_RGB24);
 #else
     int i;
@@ -1826,7 +1826,7 @@ static inline void RENAME(rgb24ToY)(uint8_t *dst, uint8_t *src, long width, uint
 
 static inline void RENAME(rgb24ToUV)(uint8_t *dstU, uint8_t *dstV, uint8_t *src1, uint8_t *src2, long width, uint32_t *unused)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     assert(src1==src2);
     RENAME(bgr24ToUV_mmx)(dstU, dstV, src1, width, PIX_FMT_RGB24);
 #else
@@ -1908,7 +1908,7 @@ static inline void RENAME(monoblack2Y)(uint8_t *dst, uint8_t *src, long width, u
 static inline void RENAME(hScale)(int16_t *dst, int dstW, uint8_t *src, int srcW, int xInc,
                                   int16_t *filter, int16_t *filterPos, long filterSize)
 {
-#ifdef HAVE_MMX
+#if HAVE_MMX
     assert(filterSize % 4 == 0 && filterSize>0);
     if (filterSize==4) // Always true for upscaling, sometimes for down, too.
     {
@@ -2064,7 +2064,7 @@ static inline void RENAME(hScale)(int16_t *dst, int dstW, uint8_t *src, int srcW
         );
     }
 #else
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
     hScale_altivec_real(dst, dstW, src, srcW, xInc, filter, filterPos, filterSize);
 #else
     int i;
@@ -2169,7 +2169,7 @@ static inline void RENAME(hyscale)(SwsContext *c, uint16_t *dst, long dstWidth,
         src= formatConvBuffer;
     }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
     // Use the new MMX scaler if the MMX2 one can't be used (it is faster than the x86 ASM one).
     if (!(flags&SWS_FAST_BILINEAR) || (!canMMX2BeUsed))
 #else
@@ -2180,8 +2180,8 @@ static inline void RENAME(hyscale)(SwsContext *c, uint16_t *dst, long dstWidth,
     }
     else // fast bilinear upscale / crap downscale
     {
-#if defined(ARCH_X86)
-#ifdef HAVE_MMX2
+#if ARCH_X86
+#if HAVE_MMX2
         int i;
 #if defined(PIC)
         uint64_t ebxsave __attribute__((aligned(8)));
@@ -2202,7 +2202,7 @@ static inline void RENAME(hyscale)(SwsContext *c, uint16_t *dst, long dstWidth,
             PREFETCH"      32(%%"REG_c")            \n\t"
             PREFETCH"      64(%%"REG_c")            \n\t"
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 
 #define FUNNY_Y_CODE \
             "movl            (%%"REG_b"), %%esi     \n\t"\
@@ -2292,7 +2292,7 @@ FUNNY_Y_CODE
         :: "r" (src), "m" (dst), "m" (dstWidth), "m" (xInc_shr16), "m" (xInc_mask)
         : "%"REG_a, "%"REG_d, "%ecx", "%"REG_D, "%esi"
         );
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         } //if MMX2 can't be used
 #endif
 #else
@@ -2305,7 +2305,7 @@ FUNNY_Y_CODE
             dst[i]= (src[xx]<<7) + (src[xx+1] - src[xx])*xalpha;
             xpos+=xInc;
         }
-#endif /* defined(ARCH_X86) */
+#endif /* ARCH_X86 */
     }
 
     if(c->srcRange != c->dstRange && !(isRGB(c->dstFormat) || isBGR(c->dstFormat))){
@@ -2441,7 +2441,7 @@ inline static void RENAME(hcscale)(SwsContext *c, uint16_t *dst, long dstWidth,
         src2= formatConvBuffer+VOFW;
     }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
     // Use the new MMX scaler if the MMX2 one can't be used (it is faster than the x86 ASM one).
     if (!(flags&SWS_FAST_BILINEAR) || (!canMMX2BeUsed))
 #else
@@ -2453,8 +2453,8 @@ inline static void RENAME(hcscale)(SwsContext *c, uint16_t *dst, long dstWidth,
     }
     else // fast bilinear upscale / crap downscale
     {
-#if defined(ARCH_X86)
-#ifdef HAVE_MMX2
+#if ARCH_X86
+#if HAVE_MMX2
         int i;
 #if defined(PIC)
         uint64_t ebxsave __attribute__((aligned(8)));
@@ -2475,7 +2475,7 @@ inline static void RENAME(hcscale)(SwsContext *c, uint16_t *dst, long dstWidth,
             PREFETCH" 32(%%"REG_c")             \n\t"
             PREFETCH" 64(%%"REG_c")             \n\t"
 
-#ifdef ARCH_X86_64
+#if ARCH_X86_64
 
 #define FUNNY_UV_CODE \
             "movl       (%%"REG_b"), %%esi      \n\t"\
@@ -2573,7 +2573,7 @@ FUNNY_UV_CODE
 
 /* GCC 3.3 makes MPlayer crash on IA-32 machines when using "g" operand here,
    which is needed to support GCC 4.0. */
-#if defined(ARCH_X86_64) && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
+#if ARCH_X86_64 && ((__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
             :: "m" (src1), "m" (dst), "g" ((long)dstWidth), "m" (xInc_shr16), "m" (xInc_mask),
 #else
             :: "m" (src1), "m" (dst), "m" ((long)dstWidth), "m" (xInc_shr16), "m" (xInc_mask),
@@ -2581,7 +2581,7 @@ FUNNY_UV_CODE
             "r" (src2)
             : "%"REG_a, "%"REG_d, "%ecx", "%"REG_D, "%esi"
             );
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         } //if MMX2 can't be used
 #endif
 #else
@@ -2599,7 +2599,7 @@ FUNNY_UV_CODE
             */
             xpos+=xInc;
         }
-#endif /* defined(ARCH_X86) */
+#endif /* ARCH_X86 */
     }
     if(c->srcRange != c->dstRange && !(isRGB(c->dstFormat) || isBGR(c->dstFormat))){
         int i;
@@ -2821,7 +2821,7 @@ static int RENAME(swScale)(SwsContext *c, uint8_t* src[], int srcStride[], int s
             break; //we can't output a dstY line so let's try with the next slice
         }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
         c->blueDither= ff_dither8[dstY&1];
         if (c->dstFormat == PIX_FMT_RGB555 || c->dstFormat == PIX_FMT_BGR555)
             c->greenDither= ff_dither8[dstY&1];
@@ -2833,7 +2833,7 @@ static int RENAME(swScale)(SwsContext *c, uint8_t* src[], int srcStride[], int s
         {
             int16_t **lumSrcPtr= lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;
             int16_t **chrSrcPtr= chrPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
-#ifdef HAVE_MMX
+#if HAVE_MMX
             int i;
         if (flags & SWS_ACCURATE_RND){
             int s= APCK_SIZE / 8;
@@ -2987,7 +2987,7 @@ static int RENAME(swScale)(SwsContext *c, uint8_t* src[], int srcStride[], int s
         }
     }
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
     __asm__ volatile(SFENCE:::"memory");
     __asm__ volatile(EMMS:::"memory");
 #endif
diff --git a/libswscale/yuv2rgb.c b/libswscale/yuv2rgb.c
index d19430fd17..9dedd2a701 100644
--- a/libswscale/yuv2rgb.c
+++ b/libswscale/yuv2rgb.c
@@ -45,28 +45,26 @@ extern const uint8_t dither_8x8_32[8][8];
 extern const uint8_t dither_8x8_73[8][8];
 extern const uint8_t dither_8x8_220[8][8];
 
-#ifdef HAVE_MMX
+#if HAVE_MMX
 
 /* hope these constant values are cache line aligned */
 DECLARE_ASM_CONST(8, uint64_t, mmx_00ffw)   = 0x00ff00ff00ff00ffULL;
 DECLARE_ASM_CONST(8, uint64_t, mmx_redmask) = 0xf8f8f8f8f8f8f8f8ULL;
 DECLARE_ASM_CONST(8, uint64_t, mmx_grnmask) = 0xfcfcfcfcfcfcfcfcULL;
 
-#undef HAVE_MMX
-
 //MMX versions
 #undef RENAME
-#define HAVE_MMX
 #undef HAVE_MMX2
 #undef HAVE_3DNOW
+#define HAVE_MMX2 0
+#define HAVE_3DNOW 0
 #define RENAME(a) a ## _MMX
 #include "yuv2rgb_template.c"
 
 //MMX2 versions
 #undef RENAME
-#define HAVE_MMX
-#define HAVE_MMX2
-#undef HAVE_3DNOW
+#undef HAVE_MMX2
+#define HAVE_MMX2 1
 #define RENAME(a) a ## _MMX2
 #include "yuv2rgb_template.c"
 
@@ -485,7 +483,7 @@ EPILOG(1)
 
 SwsFunc yuv2rgb_get_func_ptr (SwsContext *c)
 {
-#if defined(HAVE_MMX2) || defined(HAVE_MMX)
+#if HAVE_MMX2 || HAVE_MMX
     if (c->flags & SWS_CPU_CAPS_MMX2){
         switch(c->dstFormat){
         case PIX_FMT_RGB32:  return yuv420_rgb32_MMX2;
@@ -503,19 +501,19 @@ SwsFunc yuv2rgb_get_func_ptr (SwsContext *c)
         }
     }
 #endif
-#ifdef HAVE_VIS
+#if HAVE_VIS
     {
         SwsFunc t= yuv2rgb_init_vis(c);
         if (t) return t;
     }
 #endif
-#ifdef CONFIG_MLIB
+#if CONFIG_MLIB
     {
         SwsFunc t= yuv2rgb_init_mlib(c);
         if (t) return t;
     }
 #endif
-#ifdef HAVE_ALTIVEC
+#if HAVE_ALTIVEC
     if (c->flags & SWS_CPU_CAPS_ALTIVEC)
     {
         SwsFunc t = yuv2rgb_init_altivec(c);
@@ -523,7 +521,7 @@ SwsFunc yuv2rgb_get_func_ptr (SwsContext *c)
     }
 #endif
 
-#ifdef ARCH_BFIN
+#if ARCH_BFIN
     if (c->flags & SWS_CPU_CAPS_BFIN)
     {
         SwsFunc t = ff_bfin_yuv2rgb_get_func_ptr (c);
diff --git a/libswscale/yuv2rgb_template.c b/libswscale/yuv2rgb_template.c
index e8b6ff30cf..c66f24edeb 100644
--- a/libswscale/yuv2rgb_template.c
+++ b/libswscale/yuv2rgb_template.c
@@ -30,14 +30,14 @@
 #undef EMMS
 #undef SFENCE
 
-#ifdef HAVE_3DNOW
+#if HAVE_3DNOW
 /* On K6 femms is faster than emms. On K7 femms is directly mapped to emms. */
 #define EMMS     "femms"
 #else
 #define EMMS     "emms"
 #endif
 
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
 #define MOVNTQ "movntq"
 #define SFENCE "sfence"
 #else
@@ -335,7 +335,7 @@ static inline int RENAME(yuv420_rgb24)(SwsContext *c, uint8_t* src[], int srcStr
         "1:             \n\t"
 YUV2RGB
         /* mm0=B, %%mm2=G, %%mm1=R */
-#ifdef HAVE_MMX2
+#if HAVE_MMX2
         "movq "MANGLE(ff_M24A)", %%mm4     \n\t"
         "movq "MANGLE(ff_M24C)", %%mm7     \n\t"
         "pshufw $0x50, %%mm0, %%mm5     \n\t" /* B3 B2 B3 B2  B1 B0 B1 B0 */
-- 
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