From b4248517064d487be9bdaf729f448248fec66432 Mon Sep 17 00:00:00 2001
From: Hans-Kristian Arntzen <hans-kristian.arntzen@arm.com>
Date: Sat, 16 Apr 2016 09:25:14 +0200
Subject: [PATCH] Fix floating point OpMod.

Floating point mod uses separate builtin in GLSL.
---
 reference/shaders/comp/mod.comp | 24 ++++++++++++++++++++++++
 shaders/comp/mod.comp           | 26 ++++++++++++++++++++++++++
 spirv_glsl.cpp                  |  5 ++++-
 3 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 reference/shaders/comp/mod.comp
 create mode 100644 shaders/comp/mod.comp

diff --git a/reference/shaders/comp/mod.comp b/reference/shaders/comp/mod.comp
new file mode 100644
index 00000000..eee2bd97
--- /dev/null
+++ b/reference/shaders/comp/mod.comp
@@ -0,0 +1,24 @@
+#version 310 es
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+
+layout(binding = 0, std430) buffer SSBO
+{
+    vec4 in_data[];
+} _23;
+
+layout(binding = 1, std430) buffer SSBO2
+{
+    vec4 out_data[];
+} _33;
+
+void main()
+{
+    uint ident = gl_GlobalInvocationID.x;
+    vec4 v = mod(_23.in_data[ident], _33.out_data[ident]);
+    _33.out_data[ident] = v;
+    uvec4 vu = (floatBitsToUint(_23.in_data[ident]) % floatBitsToUint(_33.out_data[ident]));
+    _33.out_data[ident] = uintBitsToFloat(vu);
+    ivec4 vi = (floatBitsToInt(_23.in_data[ident]) % floatBitsToInt(_33.out_data[ident]));
+    _33.out_data[ident] = intBitsToFloat(vi);
+}
+
diff --git a/shaders/comp/mod.comp b/shaders/comp/mod.comp
new file mode 100644
index 00000000..1631456e
--- /dev/null
+++ b/shaders/comp/mod.comp
@@ -0,0 +1,26 @@
+#version 310 es
+layout(local_size_x = 1) in;
+
+layout(std430, binding = 0) readonly buffer SSBO
+{
+    vec4 in_data[];
+};
+
+layout(std430, binding = 1) writeonly buffer SSBO2
+{
+    vec4 out_data[];
+};
+
+void main()
+{
+    uint ident = gl_GlobalInvocationID.x;
+    vec4 v = mod(in_data[ident], out_data[ident]);
+    out_data[ident] = v;
+
+    uvec4 vu = floatBitsToUint(in_data[ident]) % floatBitsToUint(out_data[ident]);
+    out_data[ident] = uintBitsToFloat(vu);
+
+    ivec4 vi = floatBitsToInt(in_data[ident]) % floatBitsToInt(out_data[ident]);
+    out_data[ident] = intBitsToFloat(vi);
+}
+
diff --git a/spirv_glsl.cpp b/spirv_glsl.cpp
index 84497a11..a4c2b4e4 100644
--- a/spirv_glsl.cpp
+++ b/spirv_glsl.cpp
@@ -2718,10 +2718,13 @@ void CompilerGLSL::emit_instruction(const Instruction &i)
 
         case OpUMod:
         case OpSMod:
-        case OpFMod:
             BOP(%);
             break;
 
+        case OpFMod:
+            BFOP(mod);
+            break;
+
         // Relational
         case OpAny:
             UFOP(any);