From: Daniel Borca <dborca@users.sourceforge.net>
Date: Wed, 12 Jan 2005 09:25:37 +0000 (+0000)
Subject: some "safer" type-punning (gcc optimizes float moves with integer moves, anyway).
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a9531eb2c54bbdbedd7f03583d540a32d9fd918f;p=mesa.git

some "safer" type-punning (gcc optimizes float moves with integer moves, anyway).
---

diff --git a/src/mesa/drivers/glide/fxtris.c b/src/mesa/drivers/glide/fxtris.c
index f722c5c4cc8..1b5c869872a 100644
--- a/src/mesa/drivers/glide/fxtris.c
+++ b/src/mesa/drivers/glide/fxtris.c
@@ -535,14 +535,9 @@ static struct {
 #define VERT_X(_v) _v->x
 #define VERT_Y(_v) _v->y
 #define VERT_Z(_v) _v->ooz
+#define AREA_IS_CCW( a ) IS_NEGATIVE( a )
 #define GET_VERTEX(e) (fxMesa->verts + e)
 
-#ifdef USE_IEEE
-#define AREA_IS_CCW( a ) (((fi_type *)&(a))->i < 0)
-#else
-#define AREA_IS_CCW( a ) (a < 0)
-#endif
-
 
 #if FX_PACKEDCOLOR
 #define VERT_SET_RGBA( dst, f )			\
@@ -595,26 +590,26 @@ do {				\
 
 #define VERT_COPY_RGBA( v0, v1 ) 		\
 do {						\
-   *(GLuint *)&v0->r = *(GLuint *)&v1->r;	\
-   *(GLuint *)&v0->g = *(GLuint *)&v1->g;	\
-   *(GLuint *)&v0->b = *(GLuint *)&v1->b;	\
-   *(GLuint *)&v0->a = *(GLuint *)&v1->a;	\
+   COPY_FLOAT(v0->r, v1->r);			\
+   COPY_FLOAT(v0->g, v1->g);			\
+   COPY_FLOAT(v0->b, v1->b);			\
+   COPY_FLOAT(v0->a, v1->a);			\
 } while (0)
 
 #define VERT_SAVE_RGBA( idx )  			\
 do {						\
-   *(GLuint *)&color[idx][0] = *(GLuint *)&v[idx]->r;\
-   *(GLuint *)&color[idx][1] = *(GLuint *)&v[idx]->g;\
-   *(GLuint *)&color[idx][2] = *(GLuint *)&v[idx]->b;\
-   *(GLuint *)&color[idx][3] = *(GLuint *)&v[idx]->a;\
+   COPY_FLOAT(color[idx][0], v[idx]->r);	\
+   COPY_FLOAT(color[idx][1], v[idx]->g);	\
+   COPY_FLOAT(color[idx][2], v[idx]->b);	\
+   COPY_FLOAT(color[idx][3], v[idx]->a);	\
 } while (0)
 
 #define VERT_RESTORE_RGBA( idx )		\
 do {						\
-   *(GLuint *)&v[idx]->r = *(GLuint *)&color[idx][0];\
-   *(GLuint *)&v[idx]->g = *(GLuint *)&color[idx][1];\
-   *(GLuint *)&v[idx]->b = *(GLuint *)&color[idx][2];\
-   *(GLuint *)&v[idx]->a = *(GLuint *)&color[idx][3];\
+   COPY_FLOAT(v[idx]->r, color[idx][0]);	\
+   COPY_FLOAT(v[idx]->g, color[idx][1]);	\
+   COPY_FLOAT(v[idx]->b, color[idx][2]);	\
+   COPY_FLOAT(v[idx]->a, color[idx][3]);	\
 } while (0)
 
 
@@ -627,29 +622,29 @@ do {				\
 
 #define VERT_COPY_SPEC( v0, v1 ) 		\
 do {						\
-   *(GLuint *)&v0->r1 = *(GLuint *)&v1->r1;	\
-   *(GLuint *)&v0->g1 = *(GLuint *)&v1->g1;	\
-   *(GLuint *)&v0->b1 = *(GLuint *)&v1->b1;	\
+   COPY_FLOAT(v0->r1, v1->r1);			\
+   COPY_FLOAT(v0->g1, v1->g1);			\
+   COPY_FLOAT(v0->b1, v1->b1);			\
 } while (0)
 
 #define VERT_SAVE_SPEC( idx )  			\
 do {						\
-   *(GLuint *)&spec[idx][0] = *(GLuint *)&v[idx]->r1;\
-   *(GLuint *)&spec[idx][1] = *(GLuint *)&v[idx]->g1;\
-   *(GLuint *)&spec[idx][2] = *(GLuint *)&v[idx]->b1;\
+   COPY_FLOAT(spec[idx][0], v[idx]->r1);	\
+   COPY_FLOAT(spec[idx][1], v[idx]->g1);	\
+   COPY_FLOAT(spec[idx][2], v[idx]->b1);	\
 } while (0)
 
 #define VERT_RESTORE_SPEC( idx )		\
 do {						\
-   *(GLuint *)&v[idx]->r1 = *(GLuint *)&spec[idx][0];\
-   *(GLuint *)&v[idx]->g1 = *(GLuint *)&spec[idx][1];\
-   *(GLuint *)&v[idx]->b1 = *(GLuint *)&spec[idx][2];\
+   COPY_FLOAT(v[idx]->r1, spec[idx][0]);	\
+   COPY_FLOAT(v[idx]->g1, spec[idx][1]);	\
+   COPY_FLOAT(v[idx]->b1, spec[idx][2]);	\
 } while (0)
 
 
 #define LOCAL_VARS(n)				\
    fxMesaContext fxMesa = FX_CONTEXT(ctx);	\
-   GLuint color[n][4], spec[n][4];		\
+   GLfloat color[n][4], spec[n][4];		\
    (void) color; (void) spec;
 #endif /* !FX_PACKEDCOLOR */
 
diff --git a/src/mesa/drivers/glide/fxvb.c b/src/mesa/drivers/glide/fxvb.c
index 8391392265e..8b731355b51 100644
--- a/src/mesa/drivers/glide/fxvb.c
+++ b/src/mesa/drivers/glide/fxvb.c
@@ -58,10 +58,10 @@ static void copy_pv( GLcontext *ctx, GLuint edst, GLuint esrc )
 #if FX_PACKEDCOLOR
    *(GLuint *)&dst->pargb = *(GLuint *)&src->pargb;
 #else  /* !FX_PACKEDCOLOR */
-   *(GLuint *)&dst->r = *(GLuint *)&src->r;
-   *(GLuint *)&dst->g = *(GLuint *)&src->g;
-   *(GLuint *)&dst->b = *(GLuint *)&src->b;
-   *(GLuint *)&dst->a = *(GLuint *)&src->a;
+   COPY_FLOAT(dst->r, src->r);
+   COPY_FLOAT(dst->g, src->g);
+   COPY_FLOAT(dst->b, src->b);
+   COPY_FLOAT(dst->a, src->a);
 #endif /* !FX_PACKEDCOLOR */
 }
 
@@ -75,13 +75,13 @@ static void copy_pv2( GLcontext *ctx, GLuint edst, GLuint esrc )
    *(GLuint *)&dst->pargb = *(GLuint *)&src->pargb;
    *(GLuint *)&dst->pspec = *(GLuint *)&src->pspec;
 #else  /* !FX_PACKEDCOLOR */
-   *(GLuint *)&dst->r = *(GLuint *)&src->r;
-   *(GLuint *)&dst->g = *(GLuint *)&src->g;
-   *(GLuint *)&dst->b = *(GLuint *)&src->b;
-   *(GLuint *)&dst->a = *(GLuint *)&src->a;
-   *(GLuint *)&dst->r1 = *(GLuint *)&src->r1;
-   *(GLuint *)&dst->g1 = *(GLuint *)&src->g1;
-   *(GLuint *)&dst->b1 = *(GLuint *)&src->b1;
+   COPY_FLOAT(dst->r, src->r);
+   COPY_FLOAT(dst->g, src->g);
+   COPY_FLOAT(dst->b, src->b);
+   COPY_FLOAT(dst->a, src->a);
+   COPY_FLOAT(dst->r1, src->r1);
+   COPY_FLOAT(dst->g1, src->g1);
+   COPY_FLOAT(dst->b1, src->b1);
 #endif /* !FX_PACKEDCOLOR */
 }
 
@@ -104,6 +104,10 @@ static void interp_extras( GLcontext *ctx,
 {
    struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
 
+   /* If stride is zero, ColorPtr[1] is constant across the VB, so
+    * there is no point interpolating between two values as they will
+    * be identical.
+    */
    if (VB->ColorPtr[1]) {
       assert(VB->ColorPtr[1]->stride == 4 * sizeof(GLfloat));