diff options
Diffstat (limited to 'src/runtime/rand.go')
| -rw-r--r-- | src/runtime/rand.go | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/runtime/rand.go b/src/runtime/rand.go index 10cd116fad..62577dda91 100644 --- a/src/runtime/rand.go +++ b/src/runtime/rand.go @@ -115,6 +115,7 @@ func bootstrapRandReseed() { } // rand32 is uint32(rand()), called from compiler-generated code. +// //go:nosplit func rand32() uint32 { return uint32(rand()) @@ -122,6 +123,7 @@ func rand32() uint32 { // rand returns a random uint64 from the per-m chacha8 state. // Do not change signature: used via linkname from other packages. +// //go:nosplit //go:linkname rand func rand() uint64 { @@ -159,6 +161,7 @@ func mrandinit(mp *m) { // randn is like rand() % n but faster. // Do not change signature: used via linkname from other packages. +// //go:nosplit //go:linkname randn func randn(n uint32) uint32 { @@ -174,6 +177,7 @@ func randn(n uint32) uint32 { // cheaprand must not be exported to other packages: // the rule is that other packages using runtime-provided // randomness must always use rand. +// //go:nosplit func cheaprand() uint32 { mp := getg().m @@ -208,6 +212,7 @@ func cheaprand() uint32 { // cheaprand64 must not be exported to other packages: // the rule is that other packages using runtime-provided // randomness must always use rand. +// //go:nosplit func cheaprand64() int64 { return int64(cheaprand())<<31 ^ int64(cheaprand()) @@ -218,6 +223,7 @@ func cheaprand64() int64 { // cheaprandn must not be exported to other packages: // the rule is that other packages using runtime-provided // randomness must always use randn. +// //go:nosplit func cheaprandn(n uint32) uint32 { // See https://lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/ |