Mesa (master): svga: fix saturated TEX instructions
Brian Paul
brianp at kemper.freedesktop.org
Thu May 31 19:00:56 UTC 2012
Module: Mesa
Branch: master
Commit: 8009fca501a021cbaf9b25e01ff3a7793cc2c6cb
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=8009fca501a021cbaf9b25e01ff3a7793cc2c6cb
Author: Brian Paul <brianp at vmware.com>
Date: Wed May 30 16:47:34 2012 -0600
svga: fix saturated TEX instructions
TEX instructions can't do saturation. Do the TEX into a temp reg w/out
saturation, then do a MOV_SAT.
Reviewed-by: Jakob Bornecrantz <jakob at vmware.com>
---
src/gallium/drivers/svga/svga_tgsi_insn.c | 19 +++++++++++++------
1 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/src/gallium/drivers/svga/svga_tgsi_insn.c b/src/gallium/drivers/svga/svga_tgsi_insn.c
index a689126..64dfa55 100644
--- a/src/gallium/drivers/svga/svga_tgsi_insn.c
+++ b/src/gallium/drivers/svga/svga_tgsi_insn.c
@@ -1628,10 +1628,12 @@ static boolean emit_tex(struct svga_shader_emitter *emit,
emit->key.fkey.tex[unit].swizzle_b != PIPE_SWIZZLE_BLUE ||
emit->key.fkey.tex[unit].swizzle_a != PIPE_SWIZZLE_ALPHA);
- /* If doing compare processing or tex swizzle, need to put fetched color into
- * a temporary so it can be used as a source later on.
+ boolean saturate = insn->Instruction.Saturate != TGSI_SAT_NONE;
+
+ /* If doing compare processing or tex swizzle or saturation, we need to put
+ * the fetched color into a temporary so it can be used as a source later on.
*/
- if (compare || swizzle) {
+ if (compare || swizzle || saturate) {
tex_result = get_temp( emit );
}
else {
@@ -1658,7 +1660,7 @@ static boolean emit_tex(struct svga_shader_emitter *emit,
if (compare) {
SVGA3dShaderDestToken dst2;
- if (swizzle)
+ if (swizzle || saturate)
dst2 = tex_result;
else
dst2 = dst;
@@ -1710,8 +1712,13 @@ static boolean emit_tex(struct svga_shader_emitter *emit,
}
}
- if (swizzle) {
- /* swizzle from tex_result to dst */
+ if (saturate && !swizzle) {
+ /* MOV_SAT real_dst, dst */
+ if (!submit_op1( emit, inst_token( SVGA3DOP_MOV ), dst, src(tex_result) ))
+ return FALSE;
+ }
+ else if (swizzle) {
+ /* swizzle from tex_result to dst (handles saturation too, if any) */
emit_tex_swizzle(emit,
dst, src(tex_result),
emit->key.fkey.tex[unit].swizzle_r,
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