working commit

vendor/github.com/tetratelabs/wabin/ieee754/ieee754.go

@@ -0,0 +1,31 @@
+package ieee754
+
+import (
+	"encoding/binary"
+	"io"
+	"math"
+)
+
+// DecodeFloat32 decodes a float32 in IEEE 754 binary representation.
+// See https://www.w3.org/TR/2019/REC-wasm-core-1-20191205/#floating-point%E2%91%A2
+func DecodeFloat32(r io.Reader) (float32, error) {
+	buf := make([]byte, 4)
+	_, err := io.ReadFull(r, buf)
+	if err != nil {
+		return 0, err
+	}
+	raw := binary.LittleEndian.Uint32(buf)
+	return math.Float32frombits(raw), nil
+}
+
+// DecodeFloat64 decodes a float64 in IEEE 754 binary representation.
+// See https://www.w3.org/TR/2019/REC-wasm-core-1-20191205/#floating-point%E2%91%A2
+func DecodeFloat64(r io.Reader) (float64, error) {
+	buf := make([]byte, 8)
+	_, err := io.ReadFull(r, buf)
+	if err != nil {
+		return 0, err
+	}
+	raw := binary.LittleEndian.Uint64(buf)
+	return math.Float64frombits(raw), nil
+}