[Mesa-dev] [PATCH 6/9] glsl: implement mid3 built-in function
=?UTF-8?q?Maxence=20Le=20Dor=C3=A9?= <Maxence Le Doré>
maxence.ledore at gmail.com
Tue Dec 10 14:43:13 PST 2013
---
src/glsl/builtin_functions.cpp | 44 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/src/glsl/builtin_functions.cpp b/src/glsl/builtin_functions.cpp
index 1f21a37..b9beffd 100644
--- a/src/glsl/builtin_functions.cpp
+++ b/src/glsl/builtin_functions.cpp
@@ -404,6 +404,7 @@ private:
ir_expression *min3_expr(ir_variable *x, ir_variable *y, ir_variable *z);
ir_expression *max3_expr(ir_variable *x, ir_variable *y, ir_variable *z);
+ ir_expression *mid3_expr(ir_variable *x, ir_variable *y, ir_variable *z);
/**
* Call function \param f with parameters specified as the linked
@@ -589,6 +590,11 @@ private:
const glsl_type *y_type,
const glsl_type *z_type);
+ ir_function_signature *_mid3(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
@@ -2159,6 +2165,23 @@ builtin_builder::create_builtins()
_max3(shader_trinary_mimax, glsl_type::uvec4_type, glsl_type::uvec4_type, glsl_type::uvec4_type),
NULL);
+ add_function("mid3",
+ _mid3(shader_trinary_mimax, glsl_type::float_type, glsl_type::float_type, glsl_type::float_type),
+ _mid3(shader_trinary_mimax, glsl_type::vec2_type, glsl_type::vec2_type, glsl_type::vec2_type),
+ _mid3(shader_trinary_mimax, glsl_type::vec3_type, glsl_type::vec3_type, glsl_type::vec3_type),
+ _mid3(shader_trinary_mimax, glsl_type::vec4_type, glsl_type::vec4_type, glsl_type::vec4_type),
+
+ _mid3(shader_trinary_mimax, glsl_type::int_type, glsl_type::int_type, glsl_type::int_type),
+ _mid3(shader_trinary_mimax, glsl_type::ivec2_type, glsl_type::ivec2_type, glsl_type::ivec2_type),
+ _mid3(shader_trinary_mimax, glsl_type::ivec3_type, glsl_type::ivec3_type, glsl_type::ivec3_type),
+ _mid3(shader_trinary_mimax, glsl_type::ivec4_type, glsl_type::ivec4_type, glsl_type::ivec4_type),
+
+ _mid3(shader_trinary_mimax, glsl_type::uint_type, glsl_type::uint_type, glsl_type::uint_type),
+ _mid3(shader_trinary_mimax, glsl_type::uvec2_type, glsl_type::uvec2_type, glsl_type::uvec2_type),
+ _mid3(shader_trinary_mimax, glsl_type::uvec3_type, glsl_type::uvec3_type, glsl_type::uvec3_type),
+ _mid3(shader_trinary_mimax, glsl_type::uvec4_type, glsl_type::uvec4_type, glsl_type::uvec4_type),
+ NULL);
+
#undef F
#undef FI
#undef FIU
@@ -2386,6 +2409,12 @@ builtin_builder::max3_expr(ir_variable *x, ir_variable *y, ir_variable *z)
return max(x, max(y,z));
}
+ir_expression *
+builtin_builder::mid3_expr(ir_variable *x, ir_variable *y, ir_variable *z)
+{
+ return max(min(x, y), min(y, z));
+}
+
ir_call *
builtin_builder::call(ir_function *f, ir_variable *ret, exec_list params)
{
@@ -4086,6 +4115,21 @@ builtin_builder::_max3(builtin_available_predicate avail,
return sig;
}
+ir_function_signature *
+builtin_builder::_mid3(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);
+
+ body.emit(ret(mid3_expr(x, y, z)));
+
+ return sig;
+}
+
/** @} */
/******************************************************************************/
--
1.8.5.1
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