diff options
| author | Keith Randall <khr@golang.org> | 2024-06-12 18:25:55 -0700 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2024-07-23 20:53:57 +0000 |
| commit | f66db499769002f1f804f52234b7c3e5917bbad6 (patch) | |
| tree | f4a51d385077e00ee64d98f1561e69ee7ee290d7 /test/codegen | |
| parent | d15525d596eb49eba058178e3b633b5a2ebb4766 (diff) | |
| download | go-f66db499769002f1f804f52234b7c3e5917bbad6.tar.xz | |
cmd/compile: store constant floats using integer constants
x86 is better at storing constant ints than constant floats.
(It uses a constant directly in the instruction stream, instead of
loading it from a constant global memory.)
Noticed as part of #67957
Change-Id: I9b7b586ad8e0fe9ce245324f020e9526f82b209d
Reviewed-on: https://go-review.googlesource.com/c/go/+/592596
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Diffstat (limited to 'test/codegen')
| -rw-r--r-- | test/codegen/floats.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/test/codegen/floats.go b/test/codegen/floats.go index baa745bdee..d38df1cacb 100644 --- a/test/codegen/floats.go +++ b/test/codegen/floats.go @@ -227,3 +227,12 @@ func Float64DenormalFloat32Constant() float64 { // ppc64x:"FMOVD\t[$]f64\\.3800000000000000\\(SB\\)" return 0x1p-127 } + +func Float64ConstantStore(p *float64) { + // amd64: "MOVQ\t[$]4617801906721357038" + *p = 5.432 +} +func Float32ConstantStore(p *float32) { + // amd64: "MOVL\t[$]1085133554" + *p = 5.432 +} |