diff --git a/js/src/jit-test/tests/ion/testFloat32-correctness.js b/js/src/jit-test/tests/ion/testFloat32-correctness.js
index 26234b9b28f..4db32c0a5a6 100644
--- a/js/src/jit-test/tests/ion/testFloat32-correctness.js
+++ b/js/src/jit-test/tests/ion/testFloat32-correctness.js
@@ -169,3 +169,61 @@ function testBailoutToInt32() {
 }
 test(setupBailoutToInt32, testBailoutToInt32);
 
+// MMath
+function assertNear(a, b) {
+    return ( a != a && b != b ) ||
+           Math.abs(a-b) < 1e-7;
+}
+function setupTrigo() {
+    f32[0] = 0;
+    f32[1] = Math.PI / 2;
+    f32[2] = Math.PI;
+    f32[3] = 3 * Math.PI / 2;
+}
+function trigo() {
+    // Cos
+    assertNear(Math.fround(Math.cos(f32[0])), Math.cos(0));
+    assertNear(Math.fround(Math.cos(f32[1])), Math.cos(Math.PI / 2));
+    assertNear(Math.fround(Math.cos(f32[2])), Math.cos(Math.PI));
+    assertNear(Math.fround(Math.cos(f32[3])), Math.cos(3 * Math.PI / 2));
+
+    // Sin
+    assertNear(Math.fround(Math.sin(f32[0])), Math.sin(0));
+    assertNear(Math.fround(Math.sin(f32[1])), Math.sin(Math.PI / 2));
+    assertNear(Math.fround(Math.sin(f32[2])), Math.sin(Math.PI));
+    assertNear(Math.fround(Math.sin(f32[3])), Math.sin(3 * Math.PI / 2));
+
+    // Tan
+    assertNear(Math.fround(Math.tan(f32[0])), Math.tan(0));
+    assertNear(Math.fround(Math.tan(f32[1])), Math.tan(Math.PI / 2));
+    assertNear(Math.fround(Math.tan(f32[2])), Math.tan(Math.PI));
+    assertNear(Math.fround(Math.tan(f32[3])), Math.tan(3 * Math.PI / 2));
+
+    // ACos
+    assertNear(Math.fround(Math.acos(f32[0])), Math.acos(0));
+    assertNear(Math.fround(Math.acos(f32[1])), Math.acos(Math.PI / 2));
+    assertNear(Math.fround(Math.acos(f32[2])), Math.acos(Math.PI));
+    assertNear(Math.fround(Math.acos(f32[3])), Math.acos(3 * Math.PI / 2));
+
+    // ASin
+    assertNear(Math.fround(Math.asin(f32[0])), Math.asin(0));
+    assertNear(Math.fround(Math.asin(f32[1])), Math.asin(Math.PI / 2));
+    assertNear(Math.fround(Math.asin(f32[2])), Math.asin(Math.PI));
+    assertNear(Math.fround(Math.asin(f32[3])), Math.asin(3 * Math.PI / 2));
+
+    // ATan
+    assertNear(Math.fround(Math.atan(f32[0])), Math.atan(0));
+    assertNear(Math.fround(Math.atan(f32[1])), Math.atan(Math.PI / 2));
+    assertNear(Math.fround(Math.atan(f32[2])), Math.atan(Math.PI));
+    assertNear(Math.fround(Math.atan(f32[3])), Math.atan(3 * Math.PI / 2));
+}
+test(setupTrigo, trigo);
+
+function otherMath() {
+    for (var i = 0; i < 10; ++i) {
+        assertNear(Math.fround(Math.exp(f32[i])), Math.exp(f32[i]));
+        assertNear(Math.fround(Math.log(f32[i])), Math.log(f32[i]));
+    }
+};
+test(setupComp, otherMath);
+