1 files changed, 51 insertions, 0 deletions
diff --git a/vendor/github.com/chenzhuoyu/iasm/expr/ops.go b/vendor/github.com/chenzhuoyu/iasm/expr/ops.go
new file mode 100644
index 000000000..860be87df
--- /dev/null
+++ b/vendor/github.com/chenzhuoyu/iasm/expr/ops.go
@@ -0,0 +1,51 @@
+package expr
+
+import (
+    `fmt`
+)
+
+func idiv(v int64, d int64) (int64, error) {
+    if d != 0 {
+        return v / d, nil
+    } else {
+        return 0, newRuntimeError("division by zero")
+    }
+}
+
+func imod(v int64, d int64) (int64, error) {
+    if d != 0 {
+        return v % d, nil
+    } else {
+        return 0, newRuntimeError("division by zero")
+    }
+}
+
+func ipow(v int64, e int64) (int64, error) {
+    mul := v
+    ret := int64(1)
+
+    /* value must be 0 or positive */
+    if v < 0 {
+        return 0, newRuntimeError(fmt.Sprintf("negative base value: %d", v))
+    }
+
+    /* exponent must be non-negative */
+    if e < 0 {
+        return 0, newRuntimeError(fmt.Sprintf("negative exponent: %d", e))
+    }
+
+    /* fast power first round */
+    if (e & 1) != 0 {
+        ret *= mul
+    }
+
+    /* fast power remaining rounds */
+    for e >>= 1; e != 0; e >>= 1 {
+        if mul *= mul; (e & 1) != 0 {
+            ret *= mul
+        }
+    }
+
+    /* all done */
+    return ret, nil
+}