chore: go mod vendor / tidy

vendor/github.com/mmcloughlin/avo/operand/const.go

@@ -0,0 +1,64 @@
+package operand
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// Constant represents a constant literal.
+type Constant interface {
+	Op
+	Bytes() int
+	constant()
+}
+
+//go:generate go run make_const.go -output zconst.go
+
+// Special cases for floating point string representation.
+//
+// Issue 387 pointed out that floating point values that happen to be integers
+// need to have a decimal point to be parsed correctly.
+
+// String returns a representation the 32-bit float which is guaranteed to be
+// parsed as a floating point constant by the Go assembler.
+func (f F32) String() string { return asmfloat(float64(f), 32) }
+
+// String returns a representation the 64-bit float which is guaranteed to be
+// parsed as a floating point constant by the Go assembler.
+func (f F64) String() string { return asmfloat(float64(f), 64) }
+
+// asmfloat represents x as a string such that the assembler scanner will always
+// recognize it as a float. Specifically, ensure that when x is an integral
+// value, the result will still have a decimal point.
+func asmfloat(x float64, bits int) string {
+	s := strconv.FormatFloat(x, 'f', -1, bits)
+	if !strings.ContainsRune(s, '.') {
+		s += ".0"
+	}
+	return s
+}
+
+// String is a string constant.
+type String string
+
+// Asm returns an assembly syntax representation of the string s.
+func (s String) Asm() string { return fmt.Sprintf("$%q", s) }
+
+// Bytes returns the length of s.
+func (s String) Bytes() int { return len(s) }
+
+func (s String) constant() {}
+
+// Imm returns an unsigned integer constant with size guessed from x.
+func Imm(x uint64) Constant {
+	switch {
+	case uint64(uint8(x)) == x:
+		return U8(x)
+	case uint64(uint16(x)) == x:
+		return U16(x)
+	case uint64(uint32(x)) == x:
+		return U32(x)
+	}
+	return U64(x)
+}