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| author | Rob Findley <rfindley@google.com> | 2020-09-11 14:23:34 -0400 |
|---|---|---|
| committer | Rob Findley <rfindley@google.com> | 2020-09-11 14:23:34 -0400 |
| commit | f8b1c17aced24a1618c6984794be9770c5d260be (patch) | |
| tree | 45af8d39b5c3d9f43d439ebec0a2ba42b49efe70 /test/codegen/mathbits.go | |
| parent | e5d91ab096a9ff9673311f1a7f3f860a7f9c2062 (diff) | |
| parent | 07c1788357cfe6a4ee5f6f6a54d4fe9f579fa844 (diff) | |
| download | go-dev.types.tar.gz go-dev.types.zip | |
[dev.types] all: merge master into dev.typesdev.types
Change-Id: Ia6964cb4e09153c15cc9c5b441373d1b3cb8f757
Diffstat (limited to 'test/codegen/mathbits.go')
| -rw-r--r-- | test/codegen/mathbits.go | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go index 942605de55..4c35f26997 100644 --- a/test/codegen/mathbits.go +++ b/test/codegen/mathbits.go @@ -76,9 +76,17 @@ func Len64(n uint64) int { // arm:"CLZ" arm64:"CLZ" // mips:"CLZ" // wasm:"I64Clz" + // ppc64le:"SUBC","CNTLZD" + // ppc64:"SUBC","CNTLZD" return bits.Len64(n) } +func SubFromLen64(n uint64) int { + // ppc64le:"CNTLZD",-"SUBC" + // ppc64:"CNTLZD",-"SUBC" + return 64 - bits.Len64(n) +} + func Len32(n uint32) int { // amd64:"BSRQ","LEAQ",-"CMOVQEQ" // s390x:"FLOGR" @@ -291,6 +299,12 @@ func TrailingZeros64(n uint64) int { return bits.TrailingZeros64(n) } +func TrailingZeros64Subtract(n uint64) int { + // ppc64le/power8:"NEG","SUBC","ANDN","POPCNTD" + // ppc64le/power9:"SUBC","CNTTZD" + return bits.TrailingZeros64(1 - n) +} + func TrailingZeros32(n uint32) int { // amd64:"BTSQ\\t\\$32","BSFQ" // arm:"CLZ" |