[Mesa-dev] [PATCH 6/7] tgsi/exec: misc fixes for compute shaders.

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

We want to use the SysSemanticToIndex to tell if we've seen
the semantics at all.

Also add semantic swizzle support.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/gallium/auxiliary/tgsi/tgsi_exec.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index d914ef5..d86b1ca 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -898,6 +898,9 @@ tgsi_exec_machine_bind_shader(
    mach->ImmLimit = 0;
    mach->NumOutputs = 0;
 
+   for (k = 0; k < TGSI_SEMANTIC_COUNT; k++)
+      mach->SysSemanticToIndex[k] = -1;
+
    if (mach->ShaderType == PIPE_SHADER_GEOMETRY &&
        !mach->UsedGeometryShader) {
       struct tgsi_exec_vector *inputs;
@@ -1284,7 +1287,7 @@ fetch_src_file_channel(const struct tgsi_exec_machine *mach,
        * gl_FragCoord, for example, in a sys value register.
        */
       for (i = 0; i < TGSI_QUAD_SIZE; i++) {
-         chan->u[i] = mach->SystemValue[index->i[i]].xyzw[0].u[i];
+         chan->u[i] = mach->SystemValue[index->i[i]].xyzw[swizzle].u[i];
       }
       break;
 
-- 
2.5.5