1 files changed, 147 insertions, 0 deletions
diff --git a/vendor/github.com/cloudwego/iasm/x86_64/utils.go b/vendor/github.com/cloudwego/iasm/x86_64/utils.go
new file mode 100644
index 000000000..56c107ff5
--- /dev/null
+++ b/vendor/github.com/cloudwego/iasm/x86_64/utils.go
@@ -0,0 +1,147 @@
+//
+// Copyright 2024 CloudWeGo Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package x86_64
+
+import (
+    `encoding/binary`
+    `errors`
+    `reflect`
+    `strconv`
+    `unicode/utf8`
+    `unsafe`
+)
+
+const (
+    _CC_digit = 1 << iota
+    _CC_ident
+    _CC_ident0
+    _CC_number
+)
+
+func ispow2(v uint64) bool {
+    return (v & (v - 1)) == 0
+}
+
+func isdigit(cc rune) bool {
+    return '0' <= cc && cc <= '9'
+}
+
+func isalpha(cc rune) bool {
+    return (cc >= 'a' && cc <= 'z') || (cc >= 'A' && cc <= 'Z')
+}
+
+func isident(cc rune) bool {
+    return cc == '_' || isalpha(cc) || isdigit(cc)
+}
+
+func isident0(cc rune) bool {
+    return cc == '_' || isalpha(cc)
+}
+
+func isnumber(cc rune) bool {
+    return (cc == 'b' || cc == 'B') ||
+           (cc == 'o' || cc == 'O') ||
+           (cc == 'x' || cc == 'X') ||
+           (cc >= '0' && cc <= '9') ||
+           (cc >= 'a' && cc <= 'f') ||
+           (cc >= 'A' && cc <= 'F')
+}
+
+func align(v int, n int) int {
+    return (((v - 1) >> n) + 1) << n
+}
+
+func append8(m *[]byte, v byte) {
+    *m = append(*m, v)
+}
+
+func append16(m *[]byte, v uint16) {
+    p := len(*m)
+    *m = append(*m, 0, 0)
+    binary.LittleEndian.PutUint16((*m)[p:], v)
+}
+
+func append32(m *[]byte, v uint32) {
+    p := len(*m)
+    *m = append(*m, 0, 0, 0, 0)
+    binary.LittleEndian.PutUint32((*m)[p:], v)
+}
+
+func append64(m *[]byte, v uint64) {
+    p := len(*m)
+    *m = append(*m, 0, 0, 0, 0, 0, 0, 0, 0)
+    binary.LittleEndian.PutUint64((*m)[p:], v)
+}
+
+func expandmm(m *[]byte, n int, v byte) {
+    sl := (*_GoSlice)(unsafe.Pointer(m))
+    nb := sl.len + n
+
+    /* grow as needed */
+    if nb > cap(*m) {
+        *m = growslice(byteType, *m, nb)
+    }
+
+    /* fill the new area */
+    memset(unsafe.Pointer(uintptr(sl.ptr) + uintptr(sl.len)), v, uintptr(n))
+    sl.len = nb
+}
+
+func memset(p unsafe.Pointer, c byte, n uintptr) {
+    if c != 0 {
+        memsetv(p, c, n)
+    } else {
+        memclrNoHeapPointers(p, n)
+    }
+}
+
+func memsetv(p unsafe.Pointer, c byte, n uintptr) {
+    for i := uintptr(0); i < n; i++ {
+        *(*byte)(unsafe.Pointer(uintptr(p) + i)) = c
+    }
+}
+
+func literal64(v string) (uint64, error) {
+    var nb int
+    var ch rune
+    var ex error
+    var mm [12]byte
+
+    /* unquote the runes */
+    for v != "" {
+        if ch, _, v, ex = strconv.UnquoteChar(v, '\''); ex != nil {
+            return 0, ex
+        } else if nb += utf8.EncodeRune(mm[nb:], ch); nb > 8 {
+            return 0, errors.New("multi-char constant too large")
+        }
+    }
+
+    /* convert to uint64 */
+    return *(*uint64)(unsafe.Pointer(&mm)), nil
+}
+
+var (
+    byteWrap = reflect.TypeOf(byte(0))
+    byteType = (*_GoType)(efaceOf(byteWrap).ptr)
+)
+
+//go:linkname growslice runtime.growslice
+func growslice(_ *_GoType, _ []byte, _ int) []byte
+
+//go:noescape
+//go:linkname memclrNoHeapPointers runtime.memclrNoHeapPointers
+func memclrNoHeapPointers(_ unsafe.Pointer, _ uintptr)