From 3a498520754a6dc5ad30ab021e88f10a6126cadd Mon Sep 17 00:00:00 2001
From: Petrichor Park <ppark@codeweavers.com>
Date: Mon, 29 Apr 2024 12:45:52 -0500
Subject: [PATCH] vkd3d-shader/hlsl: Implement tests for the rcp() intrinsic.

---
 Makefile.am                |  1 +
 tests/hlsl/rcp.shader_test | 76 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100644 tests/hlsl/rcp.shader_test

diff --git a/Makefile.am b/Makefile.am
index 2b655fa4..1d736d25 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -176,6 +176,7 @@ vkd3d_shader_tests = \
 	tests/hlsl/pow.shader_test \
 	tests/hlsl/precise-modifier.shader_test \
 	tests/hlsl/rasteriser-ordered-views.shader_test \
+	tests/hlsl/rcp.shader_test \
 	tests/hlsl/reflect.shader_test \
 	tests/hlsl/refract.shader_test \
 	tests/hlsl/register-reservations-numeric.shader_test \
diff --git a/tests/hlsl/rcp.shader_test b/tests/hlsl/rcp.shader_test
new file mode 100644
index 00000000..dcfeb924
--- /dev/null
+++ b/tests/hlsl/rcp.shader_test
@@ -0,0 +1,76 @@
+[pixel shader todo]
+uniform float4 f;
+
+float4 main() : sv_target
+{
+    return rcp(f);
+}
+
+[test]
+uniform 0 float4 1.0 2.0 3.0 4.0
+todo(sm<6) draw quad
+probe (0, 0) rgba (1.0, 0.5, 0.3333333, 0.25) 8
+
+uniform 0 float4 -1.0 -2.0 -3.0 -4.0
+todo(sm<6) draw quad
+probe (0, 0) rgba (-1.0, -0.5, -0.3333333, -0.25) 8
+
+uniform 0 float4 12.34 56.78 -90.12 -34.56
+todo(sm<6) draw quad
+probe (0, 0) rgba (0.081037275, 0.017611835, -0.011096316, -0.028935184) 8
+
+uniform 0 float4 0.25 0.125 0.0625 0.3333333
+todo(sm<6) draw quad
+probe (0, 0) rgba (4.0, 8.0, 16.0, 3.0) 8
+
+% Degenerate cases
+uniform 0 float4 0.0 -0.0 1.0e39 -1.0e39
+todo(sm<6) draw quad
+probe (0, 0) rgba (1.0e39, -1.0e39, 0.0, -0.0) 8
+
+
+[pixel shader todo]
+% Check invertibility
+uniform float4 f;
+
+float4 main() : sv_target
+{
+    return rcp(rcp(f));
+}
+
+[test]
+uniform 0 float4 1.0 2.0 3.0 4.0
+todo(sm<6) draw quad
+probe (0, 0) rgba (1.0, 2.0, 3.0, 4.0) 8
+
+uniform 0 float4 7.604 3.1415 2.72 9.876
+todo(sm<6) draw quad
+probe (0, 0) rgba (7.604, 3.1415, 2.72, 9.876) 8
+
+uniform 0 float4 0.0 -0.0 1.0e39 -1.0e39
+todo(sm<6) draw quad
+probe (0, 0) rgba (0.0, -0.0, 1.0e39, -1.0e39)
+
+
+[pixel shader todo]
+% Make sure swizzling works
+uniform float4 f;
+
+float4 main() : sv_target
+{
+    float  a = rcp(f.x);
+    float2 b = rcp(f.zy);
+    float3 c = rcp(f.wxz);
+    float4 d = rcp(f.zyxw);
+
+    return float4(a, b.y, c.z, d.w);
+}
+
+[test]
+uniform 0 float4 1.0 2.0 3.0 4.0
+todo(sm<6) draw quad
+probe (0, 0) rgba (1.0, 0.5, 0.3333333, 0.25) 8
+
+uniform 0 float4 -1.0 -2.0 -3.0 -4.0
+todo(sm<6) draw quad
+probe (0, 0) rgba (-1.0, -0.5, -0.3333333, -0.25) 8