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Add a comment explaining why we don't use the intrinsics for these.

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This commit is contained in:
Nick Lewycky
2019-10-04 11:50:11 -07:00
parent da0cfb8fc2
commit 749691ca2a
1 changed files with 24 additions and 0 deletions
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24
lib/llvm-backend/src/code.rs
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@ -2692,6 +2692,9 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
state.push1(bits);
}
Operator::F32Min => {
// This implements the same logic as LLVM's @llvm.minimum
// intrinsic would, but x86 lowering of that intrinsics
// encounters a fatal error in LLVM 8 and LLVM 9.
let (v1, v2) = state.pop2()?;
let v1 = canonicalize_nans(builder, intrinsics, v1);
let v2 = canonicalize_nans(builder, intrinsics, v2);
@ -2735,6 +2738,9 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
state.push1(res);
}
Operator::F64Min => {
// This implements the same logic as LLVM's @llvm.minimum
// intrinsic would, but x86 lowering of that intrinsics
// encounters a fatal error in LLVM 8 and LLVM 9.
let (v1, v2) = state.pop2()?;
let v1 = canonicalize_nans(builder, intrinsics, v1);
let v2 = canonicalize_nans(builder, intrinsics, v2);
@ -2778,6 +2784,9 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
state.push1(res);
}
Operator::F32x4Min => {
// This implements the same logic as LLVM's @llvm.minimum
// intrinsic would, but x86 lowering of that intrinsics
// encounters a fatal error in LLVM 8 and LLVM 9.
let (v1, v2) = state.pop2()?;
let v1 = builder.build_bitcast(v1, intrinsics.f32x4_ty, "");
let v2 = builder.build_bitcast(v2, intrinsics.f32x4_ty, "");
@ -2830,6 +2839,9 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
state.push1(res);
}
Operator::F64x2Min => {
// This implements the same logic as LLVM's @llvm.minimum
// intrinsic would, but x86 lowering of that intrinsics
// encounters a fatal error in LLVM 8 and LLVM 9.
let (v1, v2) = state.pop2()?;
let v1 = builder.build_bitcast(v1, intrinsics.f64x2_ty, "");
let v2 = builder.build_bitcast(v2, intrinsics.f64x2_ty, "");
@ -2882,6 +2894,9 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
state.push1(res);
}
Operator::F32Max => {
// This implements the same logic as LLVM's @llvm.maximum
// intrinsic would, but x86 lowering of that intrinsics
// encounters a fatal error in LLVM 8 and LLVM 9.
let (v1, v2) = state.pop2()?;
let v1 = canonicalize_nans(builder, intrinsics, v1);
let v2 = canonicalize_nans(builder, intrinsics, v2);
@ -2924,6 +2939,9 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
state.push1(res);
}
Operator::F64Max => {
// This implements the same logic as LLVM's @llvm.maximum
// intrinsic would, but x86 lowering of that intrinsics
// encounters a fatal error in LLVM 8 and LLVM 9.
let (v1, v2) = state.pop2()?;
let v1 = canonicalize_nans(builder, intrinsics, v1);
let v2 = canonicalize_nans(builder, intrinsics, v2);
@ -2966,6 +2984,9 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
state.push1(res);
}
Operator::F32x4Max => {
// This implements the same logic as LLVM's @llvm.maximum
// intrinsic would, but x86 lowering of that intrinsics
// encounters a fatal error in LLVM 8 and LLVM 9.
let (v1, v2) = state.pop2()?;
let v1 = builder.build_bitcast(v1, intrinsics.f32x4_ty, "");
let v2 = builder.build_bitcast(v2, intrinsics.f32x4_ty, "");
@ -3018,6 +3039,9 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
state.push1(res);
}
Operator::F64x2Max => {
// This implements the same logic as LLVM's @llvm.maximum
// intrinsic would, but x86 lowering of that intrinsics
// encounters a fatal error in LLVM 8 and LLVM 9.
let (v1, v2) = state.pop2()?;
let v1 = builder.build_bitcast(v1, intrinsics.f64x2_ty, "");
let v2 = builder.build_bitcast(v2, intrinsics.f64x2_ty, "");