From: bors <bors@rust-lang.org>
Date: Mon, 7 Mar 2016 04:25:27 +0000 (+0000)
Subject: Auto merge of #32066 - ruud-v-a:fma, r=alexcrichton
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=6d262db4482e13ec05eb113e57e26d249698b4cf;hp=-c;p=rust.git

Auto merge of #32066 - ruud-v-a:fma, r=alexcrichton

This adds support for fused multiply-add and multiply-subtract vector intrinsics for 128 and 256-bit vectors of `f32` and `f64`. These correspond to the intrinsics [listed here](https://software.intel.com/en-us/node/523929) except for the `_ss` and `_sd` variants. The intrinsics added are:

 * `fmadd`
 * `fmaddsub`
 * `fmsub`
 * `fmsubadd`
 * `fnmadd`
 * `fnmsub`

The “fma” target feature must be enabled by passing `-C target-feature=+fma` to rustc when using these, otherwise LLVM will complain.

I verified locally that the `x86_mm256_fmadd_ps` and `x86_mm256_fmsub_ps` work.
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6d262db4482e13ec05eb113e57e26d249698b4cf