From 21797efa548598692a82a25959865236bd9e7116 Mon Sep 17 00:00:00 2001 From: ameerj <52414509+ameerj@users.noreply.github.com> Date: Fri, 28 May 2021 15:51:50 -0400 Subject: [PATCH] glsl: Implement IADD CC --- .../backend/glsl/emit_glsl.cpp | 2 ++ .../backend/glsl/emit_glsl_integer.cpp | 17 +++++++++++++++-- 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/src/shader_recompiler/backend/glsl/emit_glsl.cpp b/src/shader_recompiler/backend/glsl/emit_glsl.cpp index feb3ede1a..992e4b82e 100644 --- a/src/shader_recompiler/backend/glsl/emit_glsl.cpp +++ b/src/shader_recompiler/backend/glsl/emit_glsl.cpp @@ -183,6 +183,8 @@ std::string EmitGLSL(const Profile& profile, const RuntimeInfo& runtime_info, IR for (size_t index = 0; index < ctx.reg_alloc.num_used_registers; ++index) { ctx.header += fmt::format("{} R{};", ctx.reg_alloc.reg_types[index], index); } + // TODO: track CC usage + ctx.header += "uint carry;"; ctx.code.insert(0, ctx.header); ctx.code += "}"; fmt::print("\n{}\n", ctx.code); 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(std::numeric_limits::max())}; + ctx.AddU1("{}=int({})>=0?int({})>int({}-{}):int({})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({})