Avoid a call to the runtime system when doing binary fp ops on ARM...

test/mjsunit/negate.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 12 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 const SMI_MAX = (1 << 30) - 1;
 const SMI_MIN = -(1 << 30);
 
 function testmulneg(a, b) {
   var base = a * b;
-  assertEquals(-base, a * -b);
-  assertEquals(-base, -a * b);
-  assertEquals(base, -a * -b);
+  assertEquals(-base, a * -b, "a * -b where a = " + a + ", b = " + b);
+  assertEquals(-base, -a * b, "-a * b where a = " + a + ", b = " + b);
+  assertEquals(base, -a * -b, "*-a * -b where a = " + a + ", b = " + b);
 }
 
 testmulneg(2, 3);
 testmulneg(SMI_MAX, 3);
 testmulneg(SMI_MIN, 3);
 testmulneg(3.2, 2.3);
 
 var x = { valueOf: function() { return 2; } };
 var y = { valueOf: function() { return 3; } };
 
 testmulneg(x, y);
 
 // The test below depends on the correct evaluation order, which is not
 // implemented by any of the known JS engines.
 var z;
 var v = { valueOf: function() { z+=2; return z; } };
 var w = { valueOf: function() { z+=3; return z; } };
 
 z = 0;
 var base = v * w;
 z = 0;
 assertEquals(-base, -v * w);
 z = 0;
 assertEquals(base, -v * -w);