Fix x64 MathMinMax for negative untagged int32 arguments.

test/mjsunit/regress/regress-164442.js

Index: test/mjsunit/regress/regress-164442.js
diff --git a/test/mjsunit/regress/regress-sqrt.js b/test/mjsunit/regress/regress-164442.js
similarity index 86%
copy from test/mjsunit/regress/regress-sqrt.js
copy to test/mjsunit/regress/regress-164442.js
index f2a7e55242cbcdfb281f8e05c465000c98b5a8bc..1160d874f5bc9c73b9f0952627babe59771c1c8f 100644
--- a/test/mjsunit/regress/regress-sqrt.js
+++ b/test/mjsunit/regress/regress-164442.js
@@ -27,21 +27,19 @@
 
 // Flags: --allow-natives-syntax
 
-// Check that Math.sqrt returns the same value regardless of being
-// optimized or not.
+// Should not take a very long time (n^2 algorithms are bad)
 
-function f(x) {
-  return Math.sqrt(x);
+
+function ensureNotNegative(x) {
+  return Math.max(0, x | 0);
 }
 
-var x = 7.0506280066499245e-233;
 
-var a = f(x);
+ensureNotNegative(1);
+ensureNotNegative(2);
 
-f(0.1);
-f(0.2);
-%OptimizeFunctionOnNextCall(f);
+%OptimizeFunctionOnNextCall(ensureNotNegative);
 
-var b = f(x);
+var r = ensureNotNegative(-1);
 
-assertEquals(a, b);
+assertEquals(0, r);