summaryrefslogtreecommitdiffstats
path: root/js/src/jit-test/tests/asm.js/testSIMD-bitcasts.js
diff options
context:
space:
mode:
Diffstat (limited to 'js/src/jit-test/tests/asm.js/testSIMD-bitcasts.js')
-rw-r--r--js/src/jit-test/tests/asm.js/testSIMD-bitcasts.js84
1 files changed, 84 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/asm.js/testSIMD-bitcasts.js b/js/src/jit-test/tests/asm.js/testSIMD-bitcasts.js
new file mode 100644
index 000000000..c5a5fb2bc
--- /dev/null
+++ b/js/src/jit-test/tests/asm.js/testSIMD-bitcasts.js
@@ -0,0 +1,84 @@
+load(libdir + "asm.js");
+load(libdir + "simd.js");
+load(libdir + "asserts.js");
+
+// Set to true to see more JS debugging spew.
+const DEBUG = false;
+
+if (!isSimdAvailable()) {
+ DEBUG && print("won't run tests as simd extensions aren't activated yet");
+ quit(0);
+}
+
+// Test all bit-casts and normal loads and stores.
+var heap = new ArrayBuffer(BUF_MIN);
+var asU8 = new Uint8Array(heap);
+var allTypes = [
+ "Int8x16",
+ "Int16x8",
+ "Int32x4",
+ "Uint8x16",
+ "Uint16x8",
+ "Uint32x4",
+ "Float32x4"
+];
+
+// Generate a load bit-cast store test function that performs:
+//
+// function f(a, b) {
+// vec = src.load(H, a);
+// cast = dst.fromĀ«srcĀ»Bits(vec);
+// store(H, b, cast);
+// }
+//
+// Here, `H` is the heap provided by `heap`.
+function test_func(src, dst) {
+ text = `
+ "use asm";
+ var src = glob.SIMD.${src};
+ var dst = glob.SIMD.${dst};
+ var ld = src.load;
+ var st = dst.store;
+ var bc = dst.from${src}Bits;
+
+ var H = new glob.Uint8Array(heap);
+
+ function f(a, b) {
+ a = a|0;
+ b = b|0;
+
+ st(H, b, bc(ld(H, a)));
+ }
+
+ return f;
+ `;
+ return asmLink(asmCompile('glob', 'ffi', 'heap', text), this, null, heap);
+}
+
+function assertBuf16(a, b) {
+ for (let i=0; i < 16; i++) {
+ assertEq(asU8[a+i], asU8[b+i]);
+ }
+}
+
+for (let src of allTypes) {
+ for (let dst of allTypes) {
+ // Skip identity conversions.
+ if (src == dst) continue;
+
+ print(src, dst);
+ let f = test_func(src, dst);
+ // Initialize with pseudo-random data.
+ for (let i = 0; i < 64; i++) {
+ asU8[i] = (i + 17) * 97;
+ }
+
+ // Aligned load/store.
+ f(0, 16);
+ assertBuf16(0, 16);
+
+ // Unaligned access.
+ f(1, 27);
+ assertBuf16(1, 27);
+ }
+}