diff options
| author | ameerj <52414509+ameerj@users.noreply.github.com> | 2021-05-28 15:51:50 -0400 |
|---|---|---|
| committer | ameerj <52414509+ameerj@users.noreply.github.com> | 2021-07-22 21:51:36 -0400 |
| commit | 21797efa548598692a82a25959865236bd9e7116 (patch) | |
| tree | 2d5b629fbbe67ff11f908b9d019a7e653451a2a0 /src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp | |
| parent | 453cd25da57e4088826cb6df48b5b6856affe109 (diff) | |
glsl: Implement IADD CC
Diffstat (limited to 'src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp')
| -rw-r--r-- | src/shader_recompiler/backend/glsl/emit_glsl_integer.cpp | 17 |
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 6654fce814..6ff0f92480 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) { |