Nikolay Sivov : vkd3d-shader/hlsl: Use mul only for two scalars for dot().

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 99acf5038eff44c697f3735b720a5bfb3bf17428
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/99acf5038eff44c697f3735b720a5b...

Author: Nikolay Sivov 
Date:   Sun Feb 12 21:53:28 2023 +0100

vkd3d-shader/hlsl: Use mul only for two scalars for dot().

---

libs/vkd3d-shader/hlsl.y   |  2 +-
 tests/hlsl-dot.shader_test | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index 95c1c0fa..76b0eae7 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -1638,7 +1638,7 @@ static struct hlsl_ir_node *add_binary_dot_expr(struct hlsl_ctx *ctx, struct lis

if (arg1->data_type->type == HLSL_CLASS_SCALAR)
         dim = arg2->data_type->dimx;
-    else if (arg1->data_type->type == HLSL_CLASS_SCALAR)
+    else if (arg2->data_type->type == HLSL_CLASS_SCALAR)
         dim = arg1->data_type->dimx;
     else
         dim = min(arg1->data_type->dimx, arg2->data_type->dimx);
diff --git a/tests/hlsl-dot.shader_test b/tests/hlsl-dot.shader_test
index a83c2488..e51d7cb8 100644
--- a/tests/hlsl-dot.shader_test
+++ b/tests/hlsl-dot.shader_test
@@ -43,6 +43,21 @@ uniform 4 float4 10.0 11.0 12.0 13.0
 draw quad
 probe all rgba (92.0, 92.0, 92.0, 92.0)

+[pixel shader]
+uniform float4 x;
+uniform float y;
+
+float4 main() : SV_TARGET
+{
+    return dot(x, y);
+}
+
+[test]
+uniform 0 float4 10.0 11.0 12.0 13.0
+uniform 4 float4 2.0 0.0 0.0 0.0
+draw quad
+probe all rgba (92.0, 92.0, 92.0, 92.0)
+
 [pixel shader]
 uniform float x;
 uniform float y;