From 583d750fa119d504686c737be6a898994b674b69 Mon Sep 17 00:00:00 2001 From: Xiaolin Zhao Date: Sat, 2 Nov 2024 15:40:13 +0800 Subject: cmd/compile: wire up bits.Reverse intrinsics for loong64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Micro-benchmark results on Loongson 3A5000 and 3A6000: goos: linux goarch: loong64 pkg: math/bits cpu: Loongson-3A6000 @ 2500.00MHz | CL 624576 | this CL | | sec/op | sec/op vs base | Reverse 2.8130n ± 0% 0.8008n ± 0% -71.53% (p=0.000 n=20) Reverse8 0.7014n ± 0% 0.4040n ± 0% -42.40% (p=0.000 n=20) Reverse16 1.2975n ± 0% 0.6632n ± 1% -48.89% (p=0.000 n=20) Reverse32 2.7520n ± 0% 0.4042n ± 0% -85.31% (p=0.000 n=20) Reverse64 2.8970n ± 0% 0.4041n ± 0% -86.05% (p=0.000 n=20) geomean 1.828n 0.5116n -72.01% goos: linux goarch: loong64 pkg: math/bits cpu: Loongson-3A5000 @ 2500.00MHz | CL 624576 | this CL | | sec/op | sec/op vs base | Reverse 4.0050n ± 0% 0.8011n ± 0% -80.00% (p=0.000 n=20) Reverse8 0.8010n ± 0% 0.5210n ± 1% -34.96% (p=0.000 n=20) Reverse16 1.6160n ± 0% 0.6008n ± 0% -62.82% (p=0.000 n=20) Reverse32 3.8550n ± 0% 0.5179n ± 0% -86.57% (p=0.000 n=20) Reverse64 3.8050n ± 0% 0.5177n ± 0% -86.40% (p=0.000 n=20) geomean 2.378n 0.5828n -75.49% Updates #59120 This patch is a copy of CL 483656. Co-authored-by: WANG Xuerui Change-Id: I98681091763279279c8404bd0295785f13ea1c8e Reviewed-on: https://go-review.googlesource.com/c/go/+/624276 Reviewed-by: abner chenc LUCI-TryBot-Result: Go LUCI Reviewed-by: Cherry Mui Reviewed-by: David Chase --- test/codegen/mathbits.go | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'test/codegen/mathbits.go') diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go index 715f67a3c8..a3d1143424 100644 --- a/test/codegen/mathbits.go +++ b/test/codegen/mathbits.go @@ -199,6 +199,35 @@ func OnesCount8(n uint8) int { return bits.OnesCount8(n) } +// ------------------ // +// bits.Reverse // +// ------------------ // + +func Reverse(n uint) uint { + // loong64:"BITREVV" + return bits.Reverse(n) +} + +func Reverse64(n uint64) uint64 { + // loong64:"BITREVV" + return bits.Reverse64(n) +} + +func Reverse32(n uint32) uint32 { + // loong64:"BITREVW" + return bits.Reverse32(n) +} + +func Reverse16(n uint16) uint16 { + // loong64:"BITREV4B","REVB2H" + return bits.Reverse16(n) +} + +func Reverse8(n uint8) uint8 { + // loong64:"BITREV4B" + return bits.Reverse8(n) +} + // ----------------------- // // bits.ReverseBytes // // ----------------------- // -- cgit v1.3