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authorameerj <52414509+ameerj@users.noreply.github.com>2021-05-28 21:51:50 +0200
committerameerj <52414509+ameerj@users.noreply.github.com>2021-07-23 03:51:36 +0200
commit21797efa548598692a82a25959865236bd9e7116 (patch)
tree2d5b629fbbe67ff11f908b9d019a7e653451a2a0 /src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
parentglsl: SSBO access fixes and wip SampleExplicitLod implementation. (diff)
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Diffstat (limited to 'src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp')
-rw-r--r--src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp17
1 files changed, 15 insertions, 2 deletions
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
index 6654fce81..6ff0f9248 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp
@@ -29,9 +29,22 @@ void SetSignFlag(EmitContext& ctx, IR::Inst& inst, std::string_view result) {
} // Anonymous namespace
void EmitIAdd32(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b) {
const auto result{ctx.reg_alloc.Define(inst, Type::U32)};
- ctx.Add("{}={}+{};", result, a, b);
+ if (IR::Inst* const carry{inst.GetAssociatedPseudoOperation(IR::Opcode::GetCarryFromOp)}) {
+ ctx.Add("{}=uaddCarry({},{},carry);", result, a, b);
+ ctx.AddU1("{}=carry!=0;", *carry, result);
+ carry->Invalidate();
+ } else {
+ ctx.Add("{}={}+{};", result, a, b);
+ }
SetZeroFlag(ctx, inst, result);
SetSignFlag(ctx, inst, result);
+ if (IR::Inst * overflow{inst.GetAssociatedPseudoOperation(IR::Opcode::GetOverflowFromOp)}) {
+ // https://stackoverflow.com/questions/55468823/how-to-detect-integer-overflow-in-c
+ constexpr u32 s32_max{static_cast<u32>(std::numeric_limits<s32>::max())};
+ ctx.AddU1("{}=int({})>=0?int({})>int({}-{}):int({})<int({}-{});", *overflow, a, b, s32_max,
+ a, b, s32_max, a);
+ overflow->Invalidate();
+ }
}
void EmitIAdd64(EmitContext& ctx, IR::Inst& inst, std::string_view a, std::string_view b) {
@@ -179,7 +192,7 @@ void EmitSLessThan(EmitContext& ctx, IR::Inst& inst, std::string_view lhs, std::
}
void EmitULessThan(EmitContext& ctx, IR::Inst& inst, std::string_view lhs, std::string_view rhs) {
- ctx.AddU1("{}=uint({})<uint({)};", inst, lhs, rhs);
+ ctx.AddU1("{}=uint({})<uint({});", inst, lhs, rhs);
}
void EmitIEqual(EmitContext& ctx, IR::Inst& inst, std::string_view lhs, std::string_view rhs) {