Implement OpIAddCarry, OpISubBorrow

Bug: b/126873455 Test: dEQP-VK.*carry* Test: dEQP-VK.*borrow* Change-Id: I2e1ec3cac30bb6abbb305a903bf457da241c8bdc Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/30969Tested-by: Chris Forbes <chrisforbes@google.com> Reviewed-by: Nicolas Capens <nicolascapens@google.com>

Implement OpIAddCarry, OpISubBorrow
3e6f60b3 · Chris Forbes · 90d251aa · 3e6f60b3
Commit 3e6f60b3 authored May 08, 2019 by Chris Forbes
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SpirvShader.cpp src/Pipeline/SpirvShader.cpp +12 -0

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--- a/src/Pipeline/SpirvShader.cpp
+++ b/src/Pipeline/SpirvShader.cpp
@@ -823,6 +823,8 @@ namespace sw
 			case spv::OpLogicalNotEqual:
 			case spv::OpUMulExtended:
 			case spv::OpSMulExtended:
+			case spv::OpIAddCarry:
+			case spv::OpISubBorrow:
 			case spv::OpDot:
 			case spv::OpConvertFToU:
 			case spv::OpConvertFToS:
@@ -2376,6 +2378,8 @@ namespace sw
 		case spv::OpLogicalNotEqual:
 		case spv::OpUMulExtended:
 		case spv::OpSMulExtended:
+		case spv::OpIAddCarry:
+		case spv::OpISubBorrow:
 			return EmitBinaryOp(insn, state);
 		case spv::OpDot:
@@ -3390,6 +3394,14 @@ namespace sw
 				dst.move(i, lhs.UInt(i) * rhs.UInt(i));
 				dst.move(i + lhsType.sizeInComponents, MulHigh(lhs.UInt(i), rhs.UInt(i)));
 				break;
+			case spv::OpIAddCarry:
+				dst.move(i, lhs.UInt(i) + rhs.UInt(i));
+				dst.move(i + lhsType.sizeInComponents, CmpLT(dst.UInt(i), lhs.UInt(i)) >> 31);
+				break;
+			case spv::OpISubBorrow:
+				dst.move(i, lhs.UInt(i) - rhs.UInt(i));
+				dst.move(i + lhsType.sizeInComponents, CmpLT(lhs.UInt(i), rhs.UInt(i)) >> 31);
+				break;
 			default:
 				UNREACHABLE("%s", OpcodeName(insn.opcode()).c_str());
 			}