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Revert "cmd/compile: optimize 386's math.bits.TrailingZeros16"

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This reverts CL 189277.

Reason for revert: broke 32-bit builders.

Updates #33902

Change-Id: Ie5f180d0371a90e5057ed578c334372e5fc3a286
Reviewed-on: https://go-review.googlesource.com/c/go/+/192097
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
This commit is contained in:
Bryan C. Mills 2019-08-28 12:42:37 +00:00
parent bc92fe8b34
commit 372b0eed17
4 changed files with 1 additions and 22 deletions
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1
test/codegen/mathbits.go
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@ -296,7 +296,6 @@ func TrailingZeros32(n uint32) int {
func TrailingZeros16(n uint16) int {
// amd64:"BSFL","BTSL\\t\\$16"
// 386:"BSFL\t"
// arm:"ORR\t\\$65536","CLZ",-"MOVHU\tR"
// arm64:"ORR\t\\$65536","RBITW","CLZW",-"MOVHU\tR",-"RBIT\t",-"CLZ\t"
// s390x:"FLOGR","OR\t\\$65536"