1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/parseInt-double-truncate.js b/js/src/jit-test/tests/cacheir/parseInt-double-truncate.js
new file mode 100644
index 0000000000..2b989f2624
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/parseInt-double-truncate.js
@@ -0,0 +1,41 @@
+// Test some double-truncation edge cases with parseInt(double).
+
+function testPos1() {
+    with({}) {}
+    var fun = d => parseInt(d);
+    for (var i = 0; i < 2000; i++) {
+        assertEq(fun(i + 0.5), i);
+    }
+    assertEq(fun(0xf_ffff_ffff) + 345, 68719477080);
+}
+testPos1();
+
+function testPos2() {
+    with({}) {}
+    var fun = d => parseInt(d);
+    for (var i = 0; i < 2000; i++) {
+        assertEq(fun(i + 0.5), i);
+    }
+    assertEq(fun(0x8000_0000) + 345, 2147483993);
+}
+testPos2();
+
+function testNeg1() {
+    with({}) {}
+    var fun = d => parseInt(d);
+    for (var i = 0; i < 2000; i++) {
+        assertEq(fun(i + 0.5), i);
+    }
+    assertEq(fun(-0xf_ffff_ffff) - 345, -68719477080);
+}
+testNeg1();
+
+function testNeg2() {
+    with({}) {}
+    var fun = d => parseInt(d);
+    for (var i = 0; i < 2000; i++) {
+        assertEq(fun(i + 0.5), i);
+    }
+    assertEq(fun(-0x8000_0001) - 345, -2147483994);
+}
+testNeg2();