From 6f865c24cc48260e68c24424cf864bffc2a5bd04 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Tue, 9 May 2006 15:09:47 +0000
Subject: [PATCH] Fixed bug #220

The AltiVec blitters don't compile, since they require __VEC__ to be enabled in
order for the compiler to understand "vector" and friends (i.e. do AltiVec)
But you don't want to turn AltiVec on globally, since then the code would only
run on a G4 (there are already runtime tests, before using the AltiVec
variants)

The solution here is to enable AltiVec locally, for the actual AltiVec code.
---
 src/video/SDL_blit_A.c | 6 ++++++
 src/video/SDL_blit_N.c | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/src/video/SDL_blit_A.c b/src/video/SDL_blit_A.c
index cff011e81..71109a27a 100644
--- a/src/video/SDL_blit_A.c
+++ b/src/video/SDL_blit_A.c
@@ -637,6 +637,9 @@ static void BlitRGBtoRGBPixelAlphaMMX(SDL_BlitInfo *info)
 #endif /* GCC_ASMBLIT, MSVC_ASMBLIT */
 
 #if SDL_ALTIVEC_BLITTERS
+#if __MWERKS__
+#pragma altivec_model on
+#endif
 #if HAVE_ALTIVEC_H
 #include <altivec.h>
 #endif
@@ -1406,6 +1409,9 @@ static void BlitRGBtoRGBSurfaceAlphaAltivec(SDL_BlitInfo *info)
         dstp += dstskip;
     }
 }
+#if __MWERKS__
+#pragma altivec_model off
+#endif
 #endif /* SDL_ALTIVEC_BLITTERS */
 
 /* fast RGB888->(A)RGB888 blending with surface alpha=128 special case */
diff --git a/src/video/SDL_blit_N.c b/src/video/SDL_blit_N.c
index 1ab31c63d..91d66ee6d 100644
--- a/src/video/SDL_blit_N.c
+++ b/src/video/SDL_blit_N.c
@@ -29,6 +29,9 @@
 /* Functions to blit from N-bit surfaces to other surfaces */
 
 #if SDL_ALTIVEC_BLITTERS
+#if __MWERKS__
+#pragma altivec_model on
+#endif
 #ifdef HAVE_ALTIVEC_H
 #include <altivec.h>
 #endif
@@ -830,6 +833,9 @@ static Uint32 GetBlitFeatures( void )
     }
     return features;
 }
+#if __MWERKS__
+#pragma altivec_model off
+#endif
 #else
 /* Feature 1 is has-MMX */
 #define GetBlitFeatures() ((Uint32)(SDL_HasMMX() ? 1 : 0))