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authorBrian Paul <[email protected]>2013-02-01 11:17:50 -0700
committerBrian Paul <[email protected]>2013-02-04 09:33:44 -0700
commit805cf07dc3a3438abd81dde330daf382cc3a8844 (patch)
tree0f888599caaa44bf28c68a1e2b019cd1893e6dab /src/mesa/state_tracker
parent13f3ae5b83ffbed504950c349d800936f450b5ca (diff)
st/mesa: emit SQRT opcode when driver supports it
Diffstat (limited to 'src/mesa/state_tracker')
-rw-r--r--src/mesa/state_tracker/st_glsl_to_tgsi.cpp28
1 files changed, 21 insertions, 7 deletions
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index c6ac634a2ab..b3da2016ddd 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -322,6 +322,7 @@ public:
int glsl_version;
bool native_integers;
+ bool have_sqrt;
variable_storage *find_variable_storage(ir_variable *var);
@@ -1761,13 +1762,18 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
break;
case ir_unop_sqrt:
- /* sqrt(x) = x * rsq(x). */
- emit_scalar(ir, TGSI_OPCODE_RSQ, result_dst, op[0]);
- emit(ir, TGSI_OPCODE_MUL, result_dst, result_src, op[0]);
- /* For incoming channels <= 0, set the result to 0. */
- op[0].negate = ~op[0].negate;
- emit(ir, TGSI_OPCODE_CMP, result_dst,
- op[0], result_src, st_src_reg_for_float(0.0));
+ if (have_sqrt) {
+ emit_scalar(ir, TGSI_OPCODE_SQRT, result_dst, op[0]);
+ }
+ else {
+ /* sqrt(x) = x * rsq(x). */
+ emit_scalar(ir, TGSI_OPCODE_RSQ, result_dst, op[0]);
+ emit(ir, TGSI_OPCODE_MUL, result_dst, result_src, op[0]);
+ /* For incoming channels <= 0, set the result to 0. */
+ op[0].negate = ~op[0].negate;
+ emit(ir, TGSI_OPCODE_CMP, result_dst,
+ op[0], result_src, st_src_reg_for_float(0.0));
+ }
break;
case ir_unop_rsq:
emit_scalar(ir, TGSI_OPCODE_RSQ, result_dst, op[0]);
@@ -4956,18 +4962,23 @@ get_mesa_program(struct gl_context *ctx,
bool progress;
struct gl_shader_compiler_options *options =
&ctx->ShaderCompilerOptions[_mesa_shader_type_to_index(shader->Type)];
+ struct pipe_screen *pscreen = ctx->st->pipe->screen;
+ unsigned ptarget;
switch (shader->Type) {
case GL_VERTEX_SHADER:
target = GL_VERTEX_PROGRAM_ARB;
+ ptarget = PIPE_SHADER_VERTEX;
target_string = "vertex";
break;
case GL_FRAGMENT_SHADER:
target = GL_FRAGMENT_PROGRAM_ARB;
+ ptarget = PIPE_SHADER_FRAGMENT;
target_string = "fragment";
break;
case GL_GEOMETRY_SHADER:
target = GL_GEOMETRY_PROGRAM_NV;
+ ptarget = PIPE_SHADER_GEOMETRY;
target_string = "geometry";
break;
default:
@@ -4989,6 +5000,9 @@ get_mesa_program(struct gl_context *ctx,
v->glsl_version = ctx->Const.GLSLVersion;
v->native_integers = ctx->Const.NativeIntegers;
+ v->have_sqrt = pscreen->get_shader_param(pscreen, ptarget,
+ PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED);
+
_mesa_generate_parameters_list_for_uniforms(shader_program, shader,
prog->Parameters);