[Mlir-commits] [mlir] [MLIR][Math][XeVM] Add MathToXeVM (`math-to-xevm`) pass (PR #159878)

[Adam Siemieniuk]

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@@ -0,0 +1,178 @@
+//===-- MathToXeVM.cpp - conversion from Math to XeVM ---------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "mlir/Conversion/MathToXeVM/MathToXeVM.h"
+#include "mlir/Conversion/ArithCommon/AttrToLLVMConverter.h"
+#include "mlir/Conversion/GPUCommon/GPUCommonPass.h"
+#include "mlir/Conversion/LLVMCommon/LoweringOptions.h"
+#include "mlir/Conversion/LLVMCommon/TypeConverter.h"
+#include "mlir/Dialect/Func/IR/FuncOps.h"
+#include "mlir/Dialect/LLVMIR/FunctionCallUtils.h"
+#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
+#include "mlir/Dialect/Math/IR/Math.h"
+#include "mlir/Dialect/Vector/IR/VectorOps.h"
+#include "mlir/IR/BuiltinDialect.h"
+#include "mlir/IR/PatternMatch.h"
+#include "mlir/Pass/Pass.h"
+#include "mlir/Transforms/DialectConversion.h"
+#include "llvm/Support/FormatVariadic.h"
+
+#include "../GPUCommon/GPUOpsLowering.h"
+
+namespace mlir {
+#define GEN_PASS_DEF_CONVERTMATHTOXEVM
+#include "mlir/Conversion/Passes.h.inc"
+} // namespace mlir
+
+using namespace mlir;
+
+#define DEBUG_TYPE "math-to-xevm"
+
+/// Convert math ops marked with `fast` (`afn`) to native OpenCL intrinsics.
+template <typename Op>
+struct ConvertNativeFuncPattern final : public OpConversionPattern<Op> {
+
+  ConvertNativeFuncPattern(MLIRContext *context, StringRef nativeFunc,
+                           PatternBenefit benefit = 1)
+      : OpConversionPattern<Op>(context, benefit), nativeFunc(nativeFunc) {}
+
+  LogicalResult
+  matchAndRewrite(Op op, typename Op::Adaptor adaptor,
+                  ConversionPatternRewriter &rewriter) const override {
+    if (!isSPIRVCompatibleFloatOrVec(op.getType()))
+      return failure();
+
+    arith::FastMathFlags fastFlags = op.getFastmath();
+    if (!(static_cast<uint32_t>(fastFlags) &
+          static_cast<uint32_t>(arith::FastMathFlags::afn)))
----------------
adam-smnk wrote:

nit: maybe `arith::bitEnumContainsAll` instead for readability?

https://github.com/llvm/llvm-project/pull/159878