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| author | Joel Sing <joel@sing.id.au> | 2026-02-21 02:14:06 +1100 |
|---|---|---|
| committer | Joel Sing <joel@sing.id.au> | 2026-02-28 03:17:49 -0800 |
| commit | ff023a334125bb4edb43db352d2c6a5eb414d2e4 (patch) | |
| tree | dd36dea57a51a6ab40cf8edb0f6c321aad878f9c | |
| parent | 5cd4b35d73c1822b03ea5624fd48cc1c294254c9 (diff) | |
| download | go-ff023a334125bb4edb43db352d2c6a5eb414d2e4.tar.xz | |
test/codegen: add code generation test for subtle.ConstantTimeSelect
The subtle.ConstantTimeSelect function is now intrinsified on a number of
architectures. Add test coverage for code generation.
Change-Id: Iff97510838b39ec2137d64a62d2f516c94710c68
Reviewed-on: https://go-review.googlesource.com/c/go/+/748400
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Xueqi Luo <1824368278@qq.com>
Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
Reviewed-by: Russ Cox <rsc@golang.org>
| -rw-r--r-- | test/codegen/condmove.go | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/test/codegen/condmove.go b/test/codegen/condmove.go index 54e5f361fe..bd2d1540b4 100644 --- a/test/codegen/condmove.go +++ b/test/codegen/condmove.go @@ -6,6 +6,8 @@ package codegen +import "crypto/subtle" + func cmovint(c int) int { x := c + 4 if x < 0 { @@ -527,3 +529,11 @@ func cmovFromMulFromFlags64sext(x int64, b bool) int64 { // amd64:"CMOV",-"MOVB.ZX",-"MUL" return x * r } + +func constantTimeSelect(v, x, y int) int { + // amd64:"CMOVQ" + // arm64:"CSEL" + // riscv64/rva20u64,riscv64/rva22u64:"SNEZ" "NEG" "AND" "OR" + // riscv64/rva23u64:"NEG" "CZERONEZ" "CZEROEQZ" "OR" -"SNEZ" -"AND" + return subtle.ConstantTimeSelect(v, x, y) +} |