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test/codegen: tighten the TrailingZeros64 test on 386

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Make the TrailingZeros64 code generation check more specific for 386.
Just checking for BSFL will match both the generic 64 bit decomposition
and the custom 386 lowering.

Change-Id: I62076f1889af0ef1f29704cba01ab419cae0c6e3
Reviewed-on: https://go-review.googlesource.com/c/go/+/656996
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Joel Sing 2025-02-26 21:03:15 +11:00 • committed by Gopher Robot
parent 577bb3d0ce
commit c1c7e5902f
1 changed files with 1 additions and 1 deletions
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2
test/codegen/mathbits.go
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@ -372,7 +372,7 @@ func TrailingZeros(n uint) int {
func TrailingZeros64(n uint64) int { func TrailingZeros64(n uint64) int {
// amd64/v1,amd64/v2:"BSFQ","MOVL\t\\$64","CMOVQEQ" // amd64/v1,amd64/v2:"BSFQ","MOVL\t\\$64","CMOVQEQ"
// amd64/v3:"TZCNTQ" // amd64/v3:"TZCNTQ"
// 386:"BSFL" // 386:"BSFL","JNE"
// arm64:"RBIT","CLZ" // arm64:"RBIT","CLZ"
// loong64:"CTZV" // loong64:"CTZV"
// s390x:"FLOGR" // s390x:"FLOGR"