1 //===- AttrToLLVMConverter.cpp - Arith attributes conversion to LLVM ------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "mlir/Conversion/ArithCommon/AttrToLLVMConverter.h"
10
11 using namespace mlir;
12
13 LLVM::FastmathFlags
convertArithFastMathFlagsToLLVM(arith::FastMathFlags arithFMF)14 mlir::arith::convertArithFastMathFlagsToLLVM(arith::FastMathFlags arithFMF) {
15 LLVM::FastmathFlags llvmFMF{};
16 const std::pair<arith::FastMathFlags, LLVM::FastmathFlags> flags[] = {
17 {arith::FastMathFlags::nnan, LLVM::FastmathFlags::nnan},
18 {arith::FastMathFlags::ninf, LLVM::FastmathFlags::ninf},
19 {arith::FastMathFlags::nsz, LLVM::FastmathFlags::nsz},
20 {arith::FastMathFlags::arcp, LLVM::FastmathFlags::arcp},
21 {arith::FastMathFlags::contract, LLVM::FastmathFlags::contract},
22 {arith::FastMathFlags::afn, LLVM::FastmathFlags::afn},
23 {arith::FastMathFlags::reassoc, LLVM::FastmathFlags::reassoc}};
24 for (auto [arithFlag, llvmFlag] : flags) {
25 if (bitEnumContainsAny(arithFMF, arithFlag))
26 llvmFMF = llvmFMF | llvmFlag;
27 }
28 return llvmFMF;
29 }
30
31 LLVM::FastmathFlagsAttr
convertArithFastMathAttrToLLVM(arith::FastMathFlagsAttr fmfAttr)32 mlir::arith::convertArithFastMathAttrToLLVM(arith::FastMathFlagsAttr fmfAttr) {
33 arith::FastMathFlags arithFMF = fmfAttr.getValue();
34 return LLVM::FastmathFlagsAttr::get(
35 fmfAttr.getContext(), convertArithFastMathFlagsToLLVM(arithFMF));
36 }
37
convertArithOverflowFlagsToLLVM(arith::IntegerOverflowFlags arithFlags)38 LLVM::IntegerOverflowFlags mlir::arith::convertArithOverflowFlagsToLLVM(
39 arith::IntegerOverflowFlags arithFlags) {
40 LLVM::IntegerOverflowFlags llvmFlags{};
41 const std::pair<arith::IntegerOverflowFlags, LLVM::IntegerOverflowFlags>
42 flags[] = {
43 {arith::IntegerOverflowFlags::nsw, LLVM::IntegerOverflowFlags::nsw},
44 {arith::IntegerOverflowFlags::nuw, LLVM::IntegerOverflowFlags::nuw}};
45 for (auto [arithFlag, llvmFlag] : flags) {
46 if (bitEnumContainsAny(arithFlags, arithFlag))
47 llvmFlags = llvmFlags | llvmFlag;
48 }
49 return llvmFlags;
50 }
51
52 LLVM::RoundingMode
convertArithRoundingModeToLLVM(arith::RoundingMode roundingMode)53 mlir::arith::convertArithRoundingModeToLLVM(arith::RoundingMode roundingMode) {
54 switch (roundingMode) {
55 case arith::RoundingMode::downward:
56 return LLVM::RoundingMode::TowardNegative;
57 case arith::RoundingMode::to_nearest_away:
58 return LLVM::RoundingMode::NearestTiesToAway;
59 case arith::RoundingMode::to_nearest_even:
60 return LLVM::RoundingMode::NearestTiesToEven;
61 case arith::RoundingMode::toward_zero:
62 return LLVM::RoundingMode::TowardZero;
63 case arith::RoundingMode::upward:
64 return LLVM::RoundingMode::TowardPositive;
65 }
66 llvm_unreachable("Unhandled rounding mode");
67 }
68
convertArithRoundingModeAttrToLLVM(arith::RoundingModeAttr roundingModeAttr)69 LLVM::RoundingModeAttr mlir::arith::convertArithRoundingModeAttrToLLVM(
70 arith::RoundingModeAttr roundingModeAttr) {
71 assert(roundingModeAttr && "Expecting valid attribute");
72 return LLVM::RoundingModeAttr::get(
73 roundingModeAttr.getContext(),
74 convertArithRoundingModeToLLVM(roundingModeAttr.getValue()));
75 }
76
77 LLVM::FPExceptionBehaviorAttr
getLLVMDefaultFPExceptionBehavior(MLIRContext & context)78 mlir::arith::getLLVMDefaultFPExceptionBehavior(MLIRContext &context) {
79 return LLVM::FPExceptionBehaviorAttr::get(&context,
80 LLVM::FPExceptionBehavior::Ignore);
81 }
82