diff options
| author | smasher164 <aindurti@gmail.com> | 2018-10-15 03:14:57 -0400 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2019-10-21 17:42:47 +0000 |
| commit | 58b031949b26efa92a80f39cf68a189b9c0ff07f (patch) | |
| tree | dc73caed45bab6d1fea6485e368c06f6f0aa130a /src/runtime/proc.go | |
| parent | 06ac26279cb93140bb2b03bcef9a3300c166cade (diff) | |
| download | go-58b031949b26efa92a80f39cf68a189b9c0ff07f.tar.xz | |
cmd/compile: add fma intrinsic for arm
This change introduces an arm intrinsic that generates the FMULAD
instruction for the fused-multiply-add operation on systems that
support it. System support is detected via cpu.ARM.HasVFPv4. A rewrite
rule translates the generic intrinsic to FMULAD.
Updates #25819.
Change-Id: I8459e5dd1cdbdca35f88a78dbeb7d387f1e20efa
Reviewed-on: https://go-review.googlesource.com/c/go/+/142117
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'src/runtime/proc.go')
| -rw-r--r-- | src/runtime/proc.go | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/runtime/proc.go b/src/runtime/proc.go index 1a51b1d83b..71e756b991 100644 --- a/src/runtime/proc.go +++ b/src/runtime/proc.go @@ -516,6 +516,8 @@ func cpuinit() { x86HasSSE41 = cpu.X86.HasSSE41 x86HasFMA = cpu.X86.HasFMA + armHasVFPv4 = cpu.ARM.HasVFPv4 + arm64HasATOMICS = cpu.ARM64.HasATOMICS } |