From cdde7302196d6642724d36e8ed5a523dce702b6b Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sat, 22 May 2021 23:31:30 -0400
Subject: [PATCH] glsl: Add a more robust fp formatter

---
 src/shader_recompiler/backend/glsl/emit_glsl.cpp   |  1 -
 .../backend/glsl/emit_glsl_floating_point.cpp      |  4 ++--
 .../backend/glsl/emit_glsl_integer.cpp             |  4 ++--
 src/shader_recompiler/backend/glsl/reg_alloc.cpp   | 14 ++++++++++----
 4 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/shader_recompiler/backend/glsl/emit_glsl.cpp b/src/shader_recompiler/backend/glsl/emit_glsl.cpp
index d1c58cefc..e48f152d0 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl.cpp
@@ -146,7 +146,6 @@ void EmitCode(EmitContext& ctx, const IR::Program& program) {
 std::string EmitGLSL(const Profile& profile, const RuntimeInfo&, IR::Program& program,
                      Bindings& bindings) {
     EmitContext ctx{program, bindings, profile};
-    // ctx.SetupBuffers();
     EmitCode(ctx, program);
     ctx.code += "}";
     return ctx.code;
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_floating_point.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_floating_point.cpp
index 19a3c236d..e8c828e7c 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_floating_point.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_floating_point.cpp
@@ -101,12 +101,12 @@ void EmitFPNeg16([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& i
 
 void EmitFPNeg32([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
                  [[maybe_unused]] std::string_view value) {
-    ctx.AddF32("{}=-{};", inst, value);
+    ctx.AddF32("{}=-({});", inst, value);
 }
 
 void EmitFPNeg64([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
                  [[maybe_unused]] std::string_view value) {
-    ctx.AddF64("{}=-{};", inst, value);
+    ctx.AddF64("{}=-({});", inst, value);
 }
 
 void EmitFPSin([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
index 083d81ccb..681bc1bfa 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
@@ -31,11 +31,11 @@ void EmitIMul32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::strin
 }
 
 void EmitINeg32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
-    ctx.AddU32("{}=-{};", inst, value);
+    ctx.AddU32("{}=-({});", inst, value);
 }
 
 void EmitINeg64(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
-    ctx.AddU64("{}=-{};", inst, value);
+    ctx.AddU64("{}=-({});", inst, value);
 }
 
 void EmitIAbs32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
diff --git a/src/shader_recompiler/backend/glsl/reg_alloc.cpp b/src/shader_recompiler/backend/glsl/reg_alloc.cpp
index 73295a1e5..007f8c89d 100644
--- a/src/shader_recompiler/backend/glsl/reg_alloc.cpp
+++ b/src/shader_recompiler/backend/glsl/reg_alloc.cpp
@@ -10,10 +10,9 @@
 #include "shader_recompiler/backend/glsl/reg_alloc.h"
 #include "shader_recompiler/exception.h"
 #include "shader_recompiler/frontend/ir/value.h"
-#pragma optimize("", off)
+
 namespace Shader::Backend::GLSL {
 namespace {
-
 std::string Representation(Id id) {
     if (id.is_condition_code != 0) {
         throw NotImplementedException("Condition code");
@@ -25,6 +24,13 @@ std::string Representation(Id id) {
     return fmt::format("R{}", index);
 }
 
+std::string FormatFloat(std::string_view value, IR::Type type) {
+    const bool needs_dot = value.find_first_of('.') == std::string_view::npos;
+    const bool needs_suffix = !value.ends_with('f');
+    const auto suffix = type == IR::Type::F32 ? "f" : "lf";
+    return fmt::format("{}{}{}", value, needs_dot ? "." : "", needs_suffix ? suffix : "");
+}
+
 std::string MakeImm(const IR::Value& value) {
     switch (value.Type()) {
     case IR::Type::U1:
@@ -32,11 +38,11 @@ std::string MakeImm(const IR::Value& value) {
     case IR::Type::U32:
         return fmt::format("{}u", value.U32());
     case IR::Type::F32:
-        return fmt::format("{}f", value.F32());
+        return FormatFloat(fmt::format("{}", value.F32()), IR::Type::F32);
     case IR::Type::U64:
         return fmt::format("{}ul", value.U64());
     case IR::Type::F64:
-        return fmt::format("{}lf", value.F64());
+        return FormatFloat(fmt::format("{}", value.F64()), IR::Type::F64);
     default:
         throw NotImplementedException("Immediate type {}", value.Type());
     }