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authorVadim Girlin <[email protected]>2013-04-25 19:42:31 +0400
committerVadim Girlin <[email protected]>2013-04-30 21:50:47 +0400
commit7d555f2f4ce8be3c53bcc914620bcefc22c05cb5 (patch)
tree3afe556033a621c5e0fd8fd0f278f719d59199f2 /src
parentdf410863d7c2377cfbabfef907fc318e10c5486e (diff)
r600g: mask unused source components for SAMPLE
This results in more clean shader code and may improve the quality of optimized code produced by r600-sb due to eliminated false dependencies in some cases. Signed-off-by: Vadim Girlin <[email protected]>
Diffstat (limited to 'src')
-rw-r--r--src/gallium/drivers/r600/r600_shader.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index bb54e38a63c..f0d3be405d2 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -4743,6 +4743,26 @@ static int tgsi_tex(struct r600_shader_ctx *ctx)
/* the array index is read from Z */
tex.coord_type_z = 0;
+ /* mask unused source components */
+ if (opcode == FETCH_OP_SAMPLE) {
+ switch (inst->Texture.Texture) {
+ case TGSI_TEXTURE_2D:
+ case TGSI_TEXTURE_RECT:
+ tex.src_sel_z = 7;
+ tex.src_sel_w = 7;
+ break;
+ case TGSI_TEXTURE_1D_ARRAY:
+ tex.src_sel_y = 7;
+ tex.src_sel_w = 7;
+ break;
+ case TGSI_TEXTURE_1D:
+ tex.src_sel_y = 7;
+ tex.src_sel_z = 7;
+ tex.src_sel_w = 7;
+ break;
+ }
+ }
+
r = r600_bytecode_add_tex(ctx->bc, &tex);
if (r)
return r;