[v2 PATCH vkd3d 5/6] vkd3d-shader/hlsl: Parse the saturate() intrinsic.

[Matteo Bruni]

From: Zebediah Figura <zfigura at codeweavers.com>

Signed-off-by: Zebediah Figura <zfigura at codeweavers.com>
Signed-off-by: Matteo Bruni <mbruni at codeweavers.com>
---
v2 (Matteo): Fix trivial whitespace error.

 Makefile.am                |  2 ++
 libs/vkd3d-shader/hlsl.y   |  9 +++++++++
 tests/saturate.shader_test | 10 ++++++++++
 3 files changed, 21 insertions(+)
 create mode 100644 tests/saturate.shader_test

diff --git a/Makefile.am b/Makefile.am
index 67dcbba4..45db1a16 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -87,6 +87,7 @@ vkd3d_shader_tests = \
 	tests/preproc-invalid.shader_test \
 	tests/preproc-macro.shader_test \
 	tests/preproc-misc.shader_test \
+	tests/saturate.shader_test \
 	tests/swizzle-0.shader_test \
 	tests/swizzle-1.shader_test \
 	tests/swizzle-2.shader_test \
@@ -295,6 +296,7 @@ XFAIL_TESTS = \
 	tests/hlsl-vector-indexing-uniform.shader_test \
 	tests/math.shader_test \
 	tests/max.shader_test \
+	tests/saturate.shader_test \
 	tests/trigonometry.shader_test \
 	tests/writemask-assignop-1.shader_test
 endif
diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index 8f634728..fe3c3289 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -1577,6 +1577,14 @@ static bool intrinsic_max(struct hlsl_ctx *ctx,
     return !!add_expr(ctx, params->instrs, HLSL_OP2_MAX, args, &loc);
 }
 
+static bool intrinsic_saturate(struct hlsl_ctx *ctx,
+        const struct parse_initializer *params, struct vkd3d_shader_location loc)
+{
+    struct hlsl_ir_node *args[3] = {params->args[0]};
+
+    return !!add_expr(ctx, params->instrs, HLSL_OP1_SAT, args, &loc);
+}
+
 static const struct intrinsic_function
 {
     const char *name;
@@ -1588,6 +1596,7 @@ intrinsic_functions[] =
 {
     {"clamp",                               3, true,  intrinsic_clamp},
     {"max",                                 2, true,  intrinsic_max},
+    {"saturate",                            1, true,  intrinsic_saturate},
 };
 
 static int intrinsic_function_name_compare(const void *a, const void *b)
diff --git a/tests/saturate.shader_test b/tests/saturate.shader_test
new file mode 100644
index 00000000..0a954e7f
--- /dev/null
+++ b/tests/saturate.shader_test
@@ -0,0 +1,10 @@
+[pixel shader]
+float4 main(uniform float2 u) : sv_target
+{
+    return float4(saturate(u), saturate(u.x + 0.5), saturate(-1.2));
+}
+
+[test]
+uniform 0 float4 0.7 -0.1 0.0 0.0
+draw quad
+probe all rgba (0.7, 0.0, 1.0, 0.0)
-- 
2.26.3