115 lines
3.2 KiB
Go
115 lines
3.2 KiB
Go
// Copyright 2024 The Libc Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build linux && (amd64 || arm64 || loong64)
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package libc // import "modernc.org/libc"
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import (
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"math"
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mbits "math/bits"
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"sync/atomic"
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"unsafe"
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)
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func a_store_8(addr uintptr, val int8) int8 {
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*(*int8)(unsafe.Pointer(addr)) = val
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return val
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}
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func a_load_8(addr uintptr) (val int8) {
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return *(*int8)(unsafe.Pointer(addr))
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}
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func a_load_16(addr uintptr) (val int16) {
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if addr&1 != 0 {
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panic("unaligned atomic access")
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}
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return *(*int16)(unsafe.Pointer(addr))
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}
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func a_store_16(addr uintptr, val uint16) {
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if addr&1 != 0 {
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panic("unaligned atomic access")
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}
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*(*uint16)(unsafe.Pointer(addr)) = val
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}
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// static inline int a_ctz_l(unsigned long x)
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func _a_ctz_l(tls *TLS, x ulong) int32 {
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if unsafe.Sizeof(x) == 8 {
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return int32(mbits.TrailingZeros64(x))
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}
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return int32(mbits.TrailingZeros32(uint32(x)))
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}
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// static inline int a_ctz_64(uint64_t x)
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func _a_ctz_64(tls *TLS, x uint64) int32 {
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return int32(mbits.TrailingZeros64(x))
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}
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func AtomicAddFloat32(addr *float32, delta float32) (new float32) {
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v := AtomicLoadFloat32(addr) + delta
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AtomicStoreFloat32(addr, v)
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return v
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}
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func AtomicLoadFloat32(addr *float32) (val float32) {
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return math.Float32frombits(atomic.LoadUint32((*uint32)(unsafe.Pointer(addr))))
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}
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func AtomicStoreFloat32(addr *float32, val float32) {
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atomic.StoreUint32((*uint32)(unsafe.Pointer(addr)), math.Float32bits(val))
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}
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func AtomicAddFloat64(addr *float64, delta float64) (new float64) {
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v := AtomicLoadFloat64(addr) + delta
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AtomicStoreFloat64(addr, v)
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return v
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}
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func AtomicLoadFloat64(addr *float64) (val float64) {
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return math.Float64frombits(atomic.LoadUint64((*uint64)(unsafe.Pointer(addr))))
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}
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func AtomicStoreFloat64(addr *float64, val float64) {
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atomic.StoreUint64((*uint64)(unsafe.Pointer(addr)), math.Float64bits(val))
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}
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func AtomicAddInt32(addr *int32, delta int32) (new int32) { return atomic.AddInt32(addr, delta) }
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func AtomicAddInt64(addr *int64, delta int64) (new int64) { return atomic.AddInt64(addr, delta) }
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func AtomicAddUint32(addr *uint32, delta uint32) (new uint32) { return atomic.AddUint32(addr, delta) }
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func AtomicAddUint64(addr *uint64, delta uint64) (new uint64) { return atomic.AddUint64(addr, delta) }
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func AtomicAddUintptr(addr *uintptr, delta uintptr) (new uintptr) {
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return atomic.AddUintptr(addr, delta)
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}
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func AtomicLoadInt32(addr *int32) (val int32) { return atomic.LoadInt32(addr) }
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func AtomicLoadInt64(addr *int64) (val int64) { return atomic.LoadInt64(addr) }
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func AtomicLoadUint32(addr *uint32) (val uint32) { return atomic.LoadUint32(addr) }
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func AtomicLoadUint64(addr *uint64) (val uint64) { return atomic.LoadUint64(addr) }
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func AtomicLoadUintptr(addr *uintptr) (val uintptr) { return atomic.LoadUintptr(addr) }
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func AtomicStoreInt32(addr *int32, val int32) { atomic.StoreInt32(addr, val) }
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func AtomicStoreUint32(addr *uint32, val uint32) { atomic.StoreUint32(addr, val) }
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func AtomicStoreUint64(addr *uint64, val uint64) { atomic.StoreUint64(addr, val) }
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func AtomicStoreUintptr(addr *uintptr, val uintptr) { atomic.StoreUintptr(addr, val) }
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func AtomicStoreInt64(addr *int64, val int64) { atomic.StoreInt64(addr, val) }
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