Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

cmd/compile: add fma intrinsic for arm

Browse source 
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>
This commit is contained in:
smasher164 2018-10-15 03:14:57 -04:00 • committed by Keith Randall
parent 06ac26279c
commit 58b031949b
12 changed files with 81 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/cmd/compile/internal/arm/ssa.go
View file

@ -226,7 +226,7 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
p.To.Reg = r
case ssa.OpARMSRR:
genregshift(s, arm.AMOVW, 0, v.Args[0].Reg(), v.Args[1].Reg(), v.Reg(), arm.SHIFT_RR)
case ssa.OpARMMULAF, ssa.OpARMMULAD, ssa.OpARMMULSF, ssa.OpARMMULSD:
case ssa.OpARMMULAF, ssa.OpARMMULAD, ssa.OpARMMULSF, ssa.OpARMMULSD, ssa.OpARMFMULAD:
r := v.Reg()
r0 := v.Args[0].Reg()
r1 := v.Args[1].Reg()