From 2469e92d8c49536617136f744c9767e14f6461d2 Mon Sep 17 00:00:00 2001 From: Meng Zhuo Date: Thu, 11 Sep 2025 17:21:02 +0800 Subject: cmd/compile: combine doubling with shift on riscv64 Change-Id: I4bee2770fedf97e35b5a5b9187a8ba3c41f9ec2e Reviewed-on: https://go-review.googlesource.com/c/go/+/702697 Reviewed-by: Keith Randall Reviewed-by: Michael Knyszek Reviewed-by: Joel Sing LUCI-TryBot-Result: Go LUCI Auto-Submit: Keith Randall --- test/codegen/shift.go | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'test/codegen') diff --git a/test/codegen/shift.go b/test/codegen/shift.go index 1c71b0f3ef..7385058726 100644 --- a/test/codegen/shift.go +++ b/test/codegen/shift.go @@ -122,27 +122,41 @@ func rshConst64x32(v int64) int64 { func lshConst32x1Add(x int32) int32 { // amd64:"SHLL\t[$]2" // loong64:"SLL\t[$]2" + // riscv64:"SLLI\t[$]2" return (x + x) << 1 } func lshConst64x1Add(x int64) int64 { // amd64:"SHLQ\t[$]2" // loong64:"SLLV\t[$]2" + // riscv64:"SLLI\t[$]2" return (x + x) << 1 } func lshConst32x2Add(x int32) int32 { // amd64:"SHLL\t[$]3" // loong64:"SLL\t[$]3" + // riscv64:"SLLI\t[$]3" return (x + x) << 2 } func lshConst64x2Add(x int64) int64 { // amd64:"SHLQ\t[$]3" // loong64:"SLLV\t[$]3" + // riscv64:"SLLI\t[$]3" return (x + x) << 2 } +func lshConst32x31Add(x int32) int32 { + // riscv64:-"SLLI","MOV\t[$]0" + return (x + x) << 31 +} + +func lshConst64x63Add(x int64) int64 { + // riscv64:-"SLLI","MOV\t[$]0" + return (x + x) << 63 +} + // ------------------ // // masked shifts // // ------------------ // -- cgit v1.3-6-g1900