From 9c498441078690bb0607316a21bfd7ed4bed526f Mon Sep 17 00:00:00 2001
From: psucien <bad_cast@protonmail.com>
Date: Fri, 19 Jul 2024 20:32:50 +0200
Subject: [PATCH] shader_recompiler: fixed sin/cos

Thanks to red_pring and gandalfthewhite0173
---
 .../backend/spirv/emit_spirv_floating_point.cpp          | 4 ++--
 .../backend/spirv/spirv_emit_context.cpp                 | 9 +++++++--
 src/shader_recompiler/backend/spirv/spirv_emit_context.h | 2 ++
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_floating_point.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_floating_point.cpp
index ce95b3709..911983a41 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_floating_point.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_floating_point.cpp
@@ -100,11 +100,11 @@ Id EmitFPNeg64(EmitContext& ctx, Id value) {
 }
 
 Id EmitFPSin(EmitContext& ctx, Id value) {
-    return ctx.OpSin(ctx.F32[1], value);
+    return ctx.OpSin(ctx.F32[1], ctx.OpFMul(ctx.F32[1], ctx.pi_x2, value));
 }
 
 Id EmitFPCos(EmitContext& ctx, Id value) {
-    return ctx.OpCos(ctx.F32[1], value);
+    return ctx.OpCos(ctx.F32[1], ctx.OpFMul(ctx.F32[1], ctx.pi_x2, value));
 }
 
 Id EmitFPExp2(EmitContext& ctx, Id value) {
diff --git a/src/shader_recompiler/backend/spirv/spirv_emit_context.cpp b/src/shader_recompiler/backend/spirv/spirv_emit_context.cpp
index 3ea01a1de..c12ae4b29 100644
--- a/src/shader_recompiler/backend/spirv/spirv_emit_context.cpp
+++ b/src/shader_recompiler/backend/spirv/spirv_emit_context.cpp
@@ -1,11 +1,14 @@
 // SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include <boost/container/static_vector.hpp>
-#include <fmt/format.h>
 #include "common/div_ceil.h"
 #include "shader_recompiler/backend/spirv/spirv_emit_context.h"
 
+#include <boost/container/static_vector.hpp>
+#include <fmt/format.h>
+
+static constexpr auto M_PI = 3.14159265358979323846f;
+
 namespace Shader::Backend::SPIRV {
 namespace {
 
@@ -100,6 +103,8 @@ void EmitContext::DefineArithmeticTypes() {
     u32_zero_value = ConstU32(0U);
     f32_zero_value = ConstF32(0.0f);
 
+    pi_x2 = ConstF32(2.0f * float(M_PI));
+
     input_f32 = Name(TypePointer(spv::StorageClass::Input, F32[1]), "input_f32");
     input_u32 = Name(TypePointer(spv::StorageClass::Input, U32[1]), "input_u32");
     input_s32 = Name(TypePointer(spv::StorageClass::Input, S32[1]), "input_s32");
diff --git a/src/shader_recompiler/backend/spirv/spirv_emit_context.h b/src/shader_recompiler/backend/spirv/spirv_emit_context.h
index 0f8081fd9..fc6783442 100644
--- a/src/shader_recompiler/backend/spirv/spirv_emit_context.h
+++ b/src/shader_recompiler/backend/spirv/spirv_emit_context.h
@@ -143,6 +143,8 @@ public:
     Id full_result_i32x2;
     Id full_result_u32x2;
 
+    Id pi_x2;
+
     Id true_value{};
     Id false_value{};
     Id u32_one_value{};