[Mesa-dev] [PATCH 2/5] i965: Use native integer uniforms when the new VS backend is in use.

[Eric Anholt]

---
 src/mesa/drivers/dri/i965/brw_context.c        |    6 +++++
 src/mesa/drivers/dri/i965/brw_context.h        |    2 -
 src/mesa/drivers/dri/i965/brw_curbe.c          |    3 +-
 src/mesa/drivers/dri/i965/brw_vec4_emit.cpp    |    1 -
 src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp |   29 ++++-------------------
 src/mesa/drivers/dri/i965/gen6_vs_state.c      |    3 +-
 6 files changed, 13 insertions(+), 31 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 8c73408..67d3c54 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -250,6 +250,12 @@ GLboolean brwCreateContext( int api,
 
    brw->new_vs_backend = (getenv("INTEL_NEW_VS") != NULL);
 
+   /* If we're using the new shader backend, we require integer uniforms
+    * stored as actual integers.
+    */
+   if (brw->new_vs_backend)
+      ctx->Const.NativeIntegers = true;
+
    return GL_TRUE;
 }
 
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index e936a88..21068d9 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -321,9 +321,7 @@ struct brw_vs_prog_data {
    GLuint urb_entry_size;
 
    const float *param[MAX_UNIFORMS * 4]; /* should be: BRW_MAX_CURBE */
-   enum param_conversion param_convert[MAX_UNIFORMS * 4];
    const float *pull_param[MAX_UNIFORMS * 4];
-   enum param_conversion pull_param_convert[MAX_UNIFORMS * 4];
 
    bool uses_new_param_layout;
 };
diff --git a/src/mesa/drivers/dri/i965/brw_curbe.c b/src/mesa/drivers/dri/i965/brw_curbe.c
index 960be10..b9a4beb 100644
--- a/src/mesa/drivers/dri/i965/brw_curbe.c
+++ b/src/mesa/drivers/dri/i965/brw_curbe.c
@@ -246,8 +246,7 @@ static void prepare_constant_buffer(struct brw_context *brw)
 
       if (brw->vs.prog_data->uses_new_param_layout) {
 	 for (i = 0; i < brw->vs.prog_data->nr_params; i++) {
-	    buf[offset + i] = convert_param(brw->vs.prog_data->param_convert[i],
-					    brw->vs.prog_data->param[i]);
+	    buf[offset + i] = *brw->vs.prog_data->param[i];
 	 }
       } else {
 	 /* Load the subset of push constants that will get used when
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp b/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp
index 65ac7d9..794f499 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_emit.cpp
@@ -120,7 +120,6 @@ vec4_visitor::setup_uniforms(int reg)
 	 unsigned int slot = this->uniforms * 4 + i;
 
 	 c->prog_data.param[slot] = NULL;
-	 c->prog_data.param_convert[slot] = PARAM_CONVERT_ZERO;
       }
 
       this->uniforms++;
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index b3a07bd..46f826c 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -362,32 +362,14 @@ vec4_visitor::setup_uniform_values(int loc, const glsl_type *type)
    case GLSL_TYPE_INT:
    case GLSL_TYPE_BOOL:
       for (unsigned int i = 0; i < type->vector_elements; i++) {
-	 int slot = this->uniforms * 4 + i;
-	 switch (type->base_type) {
-	 case GLSL_TYPE_FLOAT:
-	    c->prog_data.param_convert[slot] = PARAM_NO_CONVERT;
-	    break;
-	 case GLSL_TYPE_UINT:
-	    c->prog_data.param_convert[slot] = PARAM_CONVERT_F2U;
-	    break;
-	 case GLSL_TYPE_INT:
-	    c->prog_data.param_convert[slot] = PARAM_CONVERT_F2I;
-	    break;
-	 case GLSL_TYPE_BOOL:
-	    c->prog_data.param_convert[slot] = PARAM_CONVERT_F2B;
-	    break;
-	 default:
-	    assert(!"not reached");
-	    c->prog_data.param_convert[slot] = PARAM_NO_CONVERT;
-	    break;
-	 }
-	 c->prog_data.param[slot] = &values[i];
+	 c->prog_data.param[this->uniforms * 4 + i] = &values[i];
       }
 
+      /* Set up pad elements to get things aligned to a vec4 boundary. */
       for (unsigned int i = type->vector_elements; i < 4; i++) {
-	 c->prog_data.param_convert[this->uniforms * 4 + i] =
-	    PARAM_CONVERT_ZERO;
-	 c->prog_data.param[this->uniforms * 4 + i] = NULL;
+	 static float zero = 0;
+
+	 c->prog_data.param[this->uniforms * 4 + i] = &zero;
       }
 
       this->uniform_size[this->uniforms] = type->vector_elements;
@@ -448,7 +430,6 @@ vec4_visitor::setup_builtin_uniform_values(ir_variable *ir)
 	 last_swiz = swiz;
 
 	 c->prog_data.param[this->uniforms * 4 + j] = &values[swiz];
-	 c->prog_data.param_convert[this->uniforms * 4 + j] = PARAM_NO_CONVERT;
 	 if (swiz <= last_swiz)
 	    this->uniform_size[this->uniforms]++;
       }
diff --git a/src/mesa/drivers/dri/i965/gen6_vs_state.c b/src/mesa/drivers/dri/i965/gen6_vs_state.c
index b94121e..f1123af 100644
--- a/src/mesa/drivers/dri/i965/gen6_vs_state.c
+++ b/src/mesa/drivers/dri/i965/gen6_vs_state.c
@@ -83,8 +83,7 @@ gen6_prepare_vs_push_constants(struct brw_context *brw)
 
       if (brw->vs.prog_data->uses_new_param_layout) {
 	 for (i = 0; i < brw->vs.prog_data->nr_params; i++) {
-	    *param = convert_param(brw->vs.prog_data->param_convert[i],
-				   brw->vs.prog_data->param[i]);
+	    *param = *brw->vs.prog_data->param[i];
 	    param++;
 	 }
 	 params_uploaded += brw->vs.prog_data->nr_params / 4;
-- 
1.7.5.4