Changeset 205507 in webkit for trunk/Source/JavaScriptCore/jit/AssemblyHelpers.cpp

Timestamp:

Sep 6, 2016, 2:35:24 PM (9 years ago)

Author:

Ryan Haddad

Message:

Unreviewed, rolling out r205504.
​https://bugs.webkit.org/show_bug.cgi?id=161645

Broke the iOS device build (Requested by ryanhaddad on
#webkit).

Reverted changeset:

"Make JSMap and JSSet faster"
​https://bugs.webkit.org/show_bug.cgi?id=160989
​http://trac.webkit.org/changeset/205504

Patch by Commit Queue <​[email protected]> on 2016-09-06

File:

• trunk/Source/JavaScriptCore/jit/AssemblyHelpers.cpp (modified) (1 diff)

trunk/Source/JavaScriptCore/jit/AssemblyHelpers.cpp

@@ -627 +627 @@
 }
 
-#if USE(JSVALUE64)
-void AssemblyHelpers::wangsInt64Hash(GPRReg inputAndResult, GPRReg scratch)
-{
-    GPRReg input = inputAndResult;
-    // key += ~(key << 32);
-    move(input, scratch);
-    lshift64(TrustedImm32(32), scratch);
-    not64(scratch);
-    add64(scratch, input);
-    // key ^= (key >> 22);
-    move(input, scratch);
-    urshift64(TrustedImm32(22), scratch);
-    xor64(scratch, input);
-    // key += ~(key << 13);
-    move(input, scratch);
-    lshift64(TrustedImm32(13), scratch);
-    not64(scratch);
-    add64(scratch, input);
-    // key ^= (key >> 8);
-    move(input, scratch);
-    urshift64(TrustedImm32(8), scratch);
-    xor64(scratch, input);
-    // key += (key << 3);
-    move(input, scratch);
-    lshift64(TrustedImm32(3), scratch);
-    add64(scratch, input);
-    // key ^= (key >> 15);
-    move(input, scratch);
-    urshift64(TrustedImm32(15), scratch);
-    xor64(scratch, input);
-    // key += ~(key << 27);
-    move(input, scratch);
-    lshift64(TrustedImm32(27), scratch);
-    not64(scratch);
-    add64(scratch, input);
-    // key ^= (key >> 31);
-    move(input, scratch);
-    urshift64(TrustedImm32(31), scratch);
-    xor64(scratch, input);
-
-    // return static_cast<unsigned>(result)
-    void* mask = bitwise_cast<void*>(static_cast<uintptr_t>(UINT_MAX));
-    and64(TrustedImmPtr(mask), inputAndResult);
-}
-#endif // USE(JSVALUE64)
-
 } // namespace JSC