Very small optimization of ARM compare stub.

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 26 matching lines @@
 #include "arguments.h"
 #include "execution.h"
 #include "ic-inl.h"
 #include "factory.h"
 #include "runtime.h"
 #include "serialize.h"
 #include "stub-cache.h"
 #include "regexp-stack.h"
 #include "ast.h"
 #include "regexp-macro-assembler.h"
+#include "platform.h"
 // Include native regexp-macro-assembler.
 #ifdef V8_NATIVE_REGEXP
 #if V8_TARGET_ARCH_IA32
 #include "ia32/regexp-macro-assembler-ia32.h"
 #elif V8_TARGET_ARCH_X64
 #include "x64/regexp-macro-assembler-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/regexp-macro-assembler-arm.h"
 #else  // Unknown architecture.
 #error "Unknown architecture."
@@ skipping 642 matching lines @@
   return x * y;
 }
 
 
 static double div_two_doubles(double x, double y) {
   return x / y;
 }
 
 
 static double mod_two_doubles(double x, double y) {
-  return fmod(x, y);
+  return modulo(x, y);
 }
 
 
-static int native_compare_doubles(double x, double y) {
-  if (x == y) return 0;
-  return x < y ? 1 : -1;
+static int native_compare_doubles(double y, double x) {
+  if (x == y) return EQUAL;
+  return x < y ? LESS : GREATER;
 }
 
 
 ExternalReference ExternalReference::double_fp_operation(
     Token::Value operation) {
   typedef double BinaryFPOperation(double x, double y);
   BinaryFPOperation* function = NULL;
   switch (operation) {
     case Token::ADD:
       function = &add_two_doubles;
@@ skipping 32 matching lines @@
   return ExternalReference(Redirect(FUNCTION_ADDR(Debug::Break)));
 }
 
 
 ExternalReference ExternalReference::debug_step_in_fp_address() {
   return ExternalReference(Debug::step_in_fp_addr());
 }
 #endif
 
 } }  // namespace v8::internal