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cmd/compile: implement float min/max in hardware for amd64 and arm64

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Update #59488

Change-Id: I89f5ea494cbcc887f6fae8560e57bcbd8749be86
Reviewed-on: https://go-review.googlesource.com/c/go/+/514596
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Keith Randall 2023-07-31 14:08:42 -07:00
parent ca36301228
commit 319504ce43
11 changed files with 298 additions and 3 deletions
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6
src/cmd/compile/internal/ssa/_gen/genericOps.go
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@ -285,6 +285,12 @@ var genericOps = []opData{
{name: "Abs", argLength: 1}, // absolute value arg0
{name: "Copysign", argLength: 2}, // copy sign from arg0 to arg1
// Float min/max implementation, if hardware is available.
{name: "Min64F", argLength: 2}, // min(arg0,arg1)
{name: "Min32F", argLength: 2}, // min(arg0,arg1)
{name: "Max64F", argLength: 2}, // max(arg0,arg1)
{name: "Max32F", argLength: 2}, // max(arg0,arg1)
// 3-input opcode.
// Fused-multiply-add, float64 only.
// When a*b+c is exactly zero (before rounding), then the result is +0 or -0.