1 files changed, 76 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/mathTrunc.js b/js/src/jit-test/tests/ion/mathTrunc.js
new file mode 100644
index 0000000000..35c0369a00
--- /dev/null
+++ b/js/src/jit-test/tests/ion/mathTrunc.js
@@ -0,0 +1,76 @@
+// Test Math.trunc() for IonMonkey.
+// Requires --ion-eager to enter at the top of each loop.
+
+var truncDITests = [
+    [0.49999999999999997, 0],
+    [0.5, 0],
+    [1.0, 1],
+    [1.5, 1],
+    [792.8, 792],
+    [-1.0001, -1],
+    [-3.14, -3],
+    [2137483649.5, 2137483649],
+    [2137483648.5, 2137483648],
+    [2137483647.1, 2137483647],
+    [-2147483647.8, -2147483647],
+];
+
+var truncDITests_bailout = [
+    ...truncDITests,
+
+    // Bailout in bailoutCvttsd2si: https://bugzil.la/1379626#c1
+    [-2147483648.8, -2147483648],
+];
+
+var truncDTests = [
+    [-0, -0],
+    [0.49999999999999997, 0],
+    [0.5, 0],
+    [1.0, 1],
+    [1.5, 1],
+    [792.8, 792],
+    [-0.1, -0],
+    [-1.0001, -1],
+    [-3.14, -3],
+    [2137483649.5, 2137483649],
+    [2137483648.5, 2137483648],
+    [2137483647.1, 2137483647],
+    [900000000000, 900000000000],
+    [-0, -0],
+    [-Infinity, -Infinity],
+    [Infinity, Infinity],
+    [NaN, NaN],
+    [-2147483648.8, -2147483648],
+    [-2147483649.8, -2147483649],
+];
+
+var truncITests = [
+    [0, 0],
+    [4, 4],
+    [-1, -1],
+    [-7, -7],
+    [2147483647, 2147483647],
+];
+
+// Typed functions to be compiled by Ion.
+function truncDI(x) { return Math.trunc(x); }
+function truncDI_bailout(x) { return Math.trunc(x); }
+function truncD(x) { return Math.trunc(x); }
+function truncI(x) { return Math.trunc(x); }
+
+function test() {
+    // Always run this function in the interpreter.
+    with ({}) {}
+
+    for (var i = 0; i < truncDITests.length; i++)
+        assertEq(truncDI(truncDITests[i][0]), truncDITests[i][1]);
+    for (var i = 0; i < truncDITests_bailout.length; i++)
+        assertEq(truncDI_bailout(truncDITests_bailout[i][0]), truncDITests_bailout[i][1]);
+    for (var i = 0; i < truncDTests.length; i++)
+        assertEq(truncD(truncDTests[i][0]), truncDTests[i][1]);
+    for (var i = 0; i < truncITests.length; i++)
+        assertEq(truncI(truncITests[i][0]), truncITests[i][1]);
+}
+
+for (var i = 0; i < 40; i++)
+    test();