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authorReinUsesLisp <reinuseslisp@airmail.cc>2020-04-26 02:56:11 +0200
committerReinUsesLisp <reinuseslisp@airmail.cc>2020-04-26 03:55:26 +0200
commit255197e64363f9286ed145cafdeb129c85c16621 (patch)
tree976cb93129b86277b8136f21f3c7c2492bb8694d /src/video_core/shader
parentdecode/register_set_predicate: Implement CC (diff)
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Diffstat (limited to 'src/video_core/shader')
-rw-r--r--src/video_core/shader/decode/arithmetic_integer.cpp22
-rw-r--r--src/video_core/shader/node.h2
2 files changed, 21 insertions, 3 deletions
diff --git a/src/video_core/shader/decode/arithmetic_integer.cpp b/src/video_core/shader/decode/arithmetic_integer.cpp
index 9af8c606d..99b4b6342 100644
--- a/src/video_core/shader/decode/arithmetic_integer.cpp
+++ b/src/video_core/shader/decode/arithmetic_integer.cpp
@@ -40,10 +40,26 @@ u32 ShaderIR::DecodeArithmeticInteger(NodeBlock& bb, u32 pc) {
op_a = GetOperandAbsNegInteger(op_a, false, instr.alu_integer.negate_a, true);
op_b = GetOperandAbsNegInteger(op_b, false, instr.alu_integer.negate_b, true);
- const Node value = Operation(OperationCode::IAdd, PRECISE, op_a, op_b);
+ Node value = Operation(OperationCode::IAdd, op_a, op_b);
- SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
- SetRegister(bb, instr.gpr0, value);
+ if (instr.generates_cc) {
+ const Node i0 = Immediate(0);
+
+ Node zero = Operation(OperationCode::LogicalIEqual, value, i0);
+ Node sign = Operation(OperationCode::LogicalILessThan, value, i0);
+ Node carry = Operation(OperationCode::LogicalAddCarry, op_a, op_b);
+
+ Node pos_a = Operation(OperationCode::LogicalIGreaterThan, op_a, i0);
+ Node pos_b = Operation(OperationCode::LogicalIGreaterThan, op_b, i0);
+ Node pos = Operation(OperationCode::LogicalAnd, std::move(pos_a), std::move(pos_b));
+ Node overflow = Operation(OperationCode::LogicalAnd, pos, sign);
+
+ SetInternalFlag(bb, InternalFlag::Zero, std::move(zero));
+ SetInternalFlag(bb, InternalFlag::Sign, std::move(sign));
+ SetInternalFlag(bb, InternalFlag::Carry, std::move(carry));
+ SetInternalFlag(bb, InternalFlag::Overflow, std::move(overflow));
+ }
+ SetRegister(bb, instr.gpr0, std::move(value));
break;
}
case OpCode::Id::IADD3_C:
diff --git a/src/video_core/shader/node.h b/src/video_core/shader/node.h
index 3eee961f5..3f5a7bc7a 100644
--- a/src/video_core/shader/node.h
+++ b/src/video_core/shader/node.h
@@ -132,6 +132,8 @@ enum class OperationCode {
LogicalUNotEqual, /// (uint a, uint b) -> bool
LogicalUGreaterEqual, /// (uint a, uint b) -> bool
+ LogicalAddCarry, /// (uint a, uint b) -> bool
+
Logical2HLessThan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HLessEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2