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Auto merge of #49249 - gnzlbg:simd_minmax, r=alexcrichton

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implement minmax intrinsics

This adds the `simd_{fmin,fmax}` intrinsics, which do a vertical (lane-wise) `min`/`max` for floating point vectors that's equivalent to Rust's `min`/`max` for `f32`/`f64`.

It might make sense to make `{f32,f64}::{min,max}` use the `minnum` and `minmax` intrinsics as well.

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~~HELP: I need some help with these. Either I should go to sleep or there must be something that I must be missing. AFAICT I am calling the `maxnum` builder correctly, yet rustc/LLVM seem to insert a call to `llvm.minnum` there instead...~~ EDIT: Rust's LLVM version is too old :/
This commit is contained in:
bors 2018-03-27 04:46:32 +00:00
commit 31ae4f9fde
7 changed files with 148 additions and 1 deletions
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20
src/rustllvm/RustWrapper.cpp
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@ -1503,3 +1503,23 @@ LLVMBuildExactUDiv(LLVMBuilderRef B, LLVMValueRef LHS,
return wrap(unwrap(B)->CreateExactUDiv(unwrap(LHS), unwrap(RHS), Name));
}
#endif
#if LLVM_VERSION_GE(6, 0)
extern "C" LLVMValueRef
LLVMRustBuildMinNum(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS) {
return wrap(unwrap(B)->CreateMinNum(unwrap(LHS),unwrap(RHS)));
}
extern "C" LLVMValueRef
LLVMRustBuildMaxNum(LLVMBuilderRef B, LLVMValueRef LHS, LLVMValueRef RHS) {
return wrap(unwrap(B)->CreateMaxNum(unwrap(LHS),unwrap(RHS)));
}
#else
extern "C" LLVMValueRef
LLVMRustBuildMinNum(LLVMBuilderRef, LLVMValueRef, LLVMValueRef) {
return nullptr;
}
extern "C" LLVMValueRef
LLVMRustBuildMaxNum(LLVMBuilderRef, LLVMValueRef, LLVMValueRef) {
return nullptr;
}
#endif