Mesa (master): glsl: Implement min3 built-in function
Kenneth Graunke
kwg at kemper.freedesktop.org
Mon Jan 6 22:26:57 UTC 2014
Module: Mesa
Branch: master
Commit: ce46e147295e841a7483d6dec2f943724ab964c3
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ce46e147295e841a7483d6dec2f943724ab964c3
Author: Maxence Le Doré <maxence.ledore at gmail.com>
Date: Fri Jan 3 00:09:51 2014 +0100
glsl: Implement min3 built-in function
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
---
src/glsl/builtin_functions.cpp | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/src/glsl/builtin_functions.cpp b/src/glsl/builtin_functions.cpp
index 18cdb24..95114c8 100644
--- a/src/glsl/builtin_functions.cpp
+++ b/src/glsl/builtin_functions.cpp
@@ -576,6 +576,11 @@ private:
ir_function_signature *_atomic_op(const char *intrinsic,
builtin_available_predicate avail);
+ ir_function_signature *_min3(builtin_available_predicate avail,
+ const glsl_type *x_type,
+ const glsl_type *y_type,
+ const glsl_type *z_type);
+
#undef B0
#undef B1
#undef B2
@@ -2112,6 +2117,23 @@ builtin_builder::create_builtins()
shader_atomic_counters),
NULL);
+ add_function("min3",
+ _min3(shader_trinary_minmax, glsl_type::float_type, glsl_type::float_type, glsl_type::float_type),
+ _min3(shader_trinary_minmax, glsl_type::vec2_type, glsl_type::vec2_type, glsl_type::vec2_type),
+ _min3(shader_trinary_minmax, glsl_type::vec3_type, glsl_type::vec3_type, glsl_type::vec3_type),
+ _min3(shader_trinary_minmax, glsl_type::vec4_type, glsl_type::vec4_type, glsl_type::vec4_type),
+
+ _min3(shader_trinary_minmax, glsl_type::int_type, glsl_type::int_type, glsl_type::int_type),
+ _min3(shader_trinary_minmax, glsl_type::ivec2_type, glsl_type::ivec2_type, glsl_type::ivec2_type),
+ _min3(shader_trinary_minmax, glsl_type::ivec3_type, glsl_type::ivec3_type, glsl_type::ivec3_type),
+ _min3(shader_trinary_minmax, glsl_type::ivec4_type, glsl_type::ivec4_type, glsl_type::ivec4_type),
+
+ _min3(shader_trinary_minmax, glsl_type::uint_type, glsl_type::uint_type, glsl_type::uint_type),
+ _min3(shader_trinary_minmax, glsl_type::uvec2_type, glsl_type::uvec2_type, glsl_type::uvec2_type),
+ _min3(shader_trinary_minmax, glsl_type::uvec3_type, glsl_type::uvec3_type, glsl_type::uvec3_type),
+ _min3(shader_trinary_minmax, glsl_type::uvec4_type, glsl_type::uvec4_type, glsl_type::uvec4_type),
+ NULL);
+
#undef F
#undef FI
#undef FIU
@@ -3997,6 +4019,22 @@ builtin_builder::_atomic_op(const char *intrinsic,
return sig;
}
+ir_function_signature *
+builtin_builder::_min3(builtin_available_predicate avail,
+ const glsl_type *x_type, const glsl_type *y_type,
+ const glsl_type *z_type)
+{
+ ir_variable *x = in_var(x_type, "x");
+ ir_variable *y = in_var(y_type, "y");
+ ir_variable *z = in_var(z_type, "z");
+ MAKE_SIG(x_type, avail, 3, x, y, z);
+
+ ir_expression *min3 = min(x, min(y,z));
+ body.emit(ret(min3));
+
+ return sig;
+}
+
/** @} */
/******************************************************************************/
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