Allow a platform to indicate that some CPU features are always...

src/arm/codegen-arm.cc

 // Copyright 2006-2009 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 4605 matching lines @@
     __ mov(pc, Operand(lr), LeaveCC, ne);  // Return.
   } else {
     // Smi compared non-strictly with a non-Smi non-heap-number.  Call
     // the runtime.
     __ b(ne, slow);
   }
 
   // Rhs is a smi, lhs is a number.
   __ push(lr);
 
-  if (CpuFeatures::IsSupported(CpuFeatures::VFP3)) {
-    CpuFeatures::Scope scope(CpuFeatures::VFP3);
+  if (CpuFeatures::IsSupported(VFP3)) {
+    CpuFeatures::Scope scope(VFP3);
     __ IntegerToDoubleConversionWithVFP3(r1, r3, r2);
   } else {
     __ mov(r7, Operand(r1));
     ConvertToDoubleStub stub1(r3, r2, r7, r6);
     __ Call(stub1.GetCode(), RelocInfo::CODE_TARGET);
   }
 
 
   // r3 and r2 are rhs as double.
   __ ldr(r1, FieldMemOperand(r0, HeapNumber::kValueOffset + kPointerSize));
@@ skipping 16 matching lines @@
     // the runtime.
     __ b(ne, slow);
   }
 
   // Lhs is a smi, rhs is a number.
   // r0 is Smi and r1 is heap number.
   __ push(lr);
   __ ldr(r2, FieldMemOperand(r1, HeapNumber::kValueOffset));
   __ ldr(r3, FieldMemOperand(r1, HeapNumber::kValueOffset + kPointerSize));
 
-  if (CpuFeatures::IsSupported(CpuFeatures::VFP3)) {
-    CpuFeatures::Scope scope(CpuFeatures::VFP3);
+  if (CpuFeatures::IsSupported(VFP3)) {
+    CpuFeatures::Scope scope(VFP3);
     __ IntegerToDoubleConversionWithVFP3(r0, r1, r0);
   } else {
     __ mov(r7, Operand(r0));
     ConvertToDoubleStub stub2(r1, r0, r7, r6);
     __ Call(stub2.GetCode(), RelocInfo::CODE_TARGET);
   }
 
   __ pop(lr);
   // Fall through to both_loaded_as_doubles.
 }
@@ skipping 189 matching lines @@
   EmitSmiNonsmiComparison(masm, &rhs_not_nan, &slow, strict_);
 
   __ bind(&both_loaded_as_doubles);
   // r0, r1, r2, r3 are the double representations of the left hand side
   // and the right hand side.
 
   // Checks for NaN in the doubles we have loaded.  Can return the answer or
   // fall through if neither is a NaN.  Also binds rhs_not_nan.
   EmitNanCheck(masm, &rhs_not_nan, cc_);
 
-  if (CpuFeatures::IsSupported(CpuFeatures::VFP3)) {
-    CpuFeatures::Scope scope(CpuFeatures::VFP3);
+  if (CpuFeatures::IsSupported(VFP3)) {
+    CpuFeatures::Scope scope(VFP3);
     // ARMv7 VFP3 instructions to implement double precision comparison.
     __ fmdrr(d6, r0, r1);
     __ fmdrr(d7, r2, r3);
 
     __ fcmp(d6, d7);
     __ vmrs(pc);
     __ mov(r0, Operand(0), LeaveCC, eq);
     __ mov(r0, Operand(1), LeaveCC, lt);
     __ mvn(r0, Operand(0), LeaveCC, gt);
     __ mov(pc, Operand(lr));
@@ skipping 95 matching lines @@
                                     const Builtins::JavaScript& builtin,
                                     Token::Value operation,
                                     OverwriteMode mode) {
   Label slow, slow_pop_2_first, do_the_call;
   Label r0_is_smi, r1_is_smi, finished_loading_r0, finished_loading_r1;
   // Smi-smi case (overflow).
   // Since both are Smis there is no heap number to overwrite, so allocate.
   // The new heap number is in r5.  r6 and r7 are scratch.
   AllocateHeapNumber(masm, &slow, r5, r6, r7);
 
-  if (CpuFeatures::IsSupported(CpuFeatures::VFP3)) {
-    CpuFeatures::Scope scope(CpuFeatures::VFP3);
+  if (CpuFeatures::IsSupported(VFP3)) {
+    CpuFeatures::Scope scope(VFP3);
     __ IntegerToDoubleConversionWithVFP3(r0, r3, r2);
     __ IntegerToDoubleConversionWithVFP3(r1, r1, r0);
   } else {
     // Write Smi from r0 to r3 and r2 in double format.  r6 is scratch.
     __ mov(r7, Operand(r0));
     ConvertToDoubleStub stub1(r3, r2, r7, r6);
     __ push(lr);
     __ Call(stub1.GetCode(), RelocInfo::CODE_TARGET);
     // Write Smi from r1 to r1 and r0 in double format.  r6 is scratch.
     __ mov(r7, Operand(r1));
@@ skipping 32 matching lines @@
   __ ldr(r2, FieldMemOperand(r0, HeapNumber::kValueOffset));
   __ ldr(r3, FieldMemOperand(r0, HeapNumber::kValueOffset + 4));
   __ jmp(&finished_loading_r0);
   __ bind(&r0_is_smi);
   if (mode == OVERWRITE_RIGHT) {
     // We can't overwrite a Smi so get address of new heap number into r5.
     AllocateHeapNumber(masm, &slow, r5, r6, r7);
   }
 
 
-  if (CpuFeatures::IsSupported(CpuFeatures::VFP3)) {
-    CpuFeatures::Scope scope(CpuFeatures::VFP3);
+  if (CpuFeatures::IsSupported(VFP3)) {
+    CpuFeatures::Scope scope(VFP3);
     __ IntegerToDoubleConversionWithVFP3(r0, r3, r2);
   } else {
     // Write Smi from r0 to r3 and r2 in double format.
     __ mov(r7, Operand(r0));
     ConvertToDoubleStub stub3(r3, r2, r7, r6);
     __ push(lr);
     __ Call(stub3.GetCode(), RelocInfo::CODE_TARGET);
     __ pop(lr);
   }
 
@@ skipping 10 matching lines @@
   // Calling convention says that first double is in r0 and r1.
   __ ldr(r0, FieldMemOperand(r1, HeapNumber::kValueOffset));
   __ ldr(r1, FieldMemOperand(r1, HeapNumber::kValueOffset + 4));
   __ jmp(&finished_loading_r1);
   __ bind(&r1_is_smi);
   if (mode == OVERWRITE_LEFT) {
     // We can't overwrite a Smi so get address of new heap number into r5.
     AllocateHeapNumber(masm, &slow, r5, r6, r7);
   }
 
-  if (CpuFeatures::IsSupported(CpuFeatures::VFP3)) {
-    CpuFeatures::Scope scope(CpuFeatures::VFP3);
+  if (CpuFeatures::IsSupported(VFP3)) {
+    CpuFeatures::Scope scope(VFP3);
     __ IntegerToDoubleConversionWithVFP3(r1, r1, r0);
   } else {
     // Write Smi from r1 to r1 and r0 in double format.
     __ mov(r7, Operand(r1));
     ConvertToDoubleStub stub4(r1, r0, r7, r6);
     __ push(lr);
     __ Call(stub4.GetCode(), RelocInfo::CODE_TARGET);
     __ pop(lr);
   }
 
   __ bind(&finished_loading_r1);
 
   __ bind(&do_the_call);
   // r0: Left value (least significant part of mantissa).
   // r1: Left value (sign, exponent, top of mantissa).
   // r2: Right value (least significant part of mantissa).
   // r3: Right value (sign, exponent, top of mantissa).
   // r5: Address of heap number for result.
 
-  if (CpuFeatures::IsSupported(CpuFeatures::VFP3) &&
+  if (CpuFeatures::IsSupported(VFP3) &&
       ((Token::MUL == operation) ||
        (Token::DIV == operation) ||
        (Token::ADD == operation) ||
        (Token::SUB == operation))) {
-    CpuFeatures::Scope scope(CpuFeatures::VFP3);
+    CpuFeatures::Scope scope(VFP3);
     // ARMv7 VFP3 instructions to implement
     // double precision, add, subtract, multiply, divide.
     __ fmdrr(d6, r0, r1);
     __ fmdrr(d7, r2, r3);
 
     if (Token::MUL == operation) {
       __ fmuld(d5, d6, d7);
     } else if (Token::DIV == operation) {
       __ fdivd(d5, d6, d7);
     } else if (Token::ADD == operation) {
@@ skipping 73 matching lines @@
   __ b(gt, slow);
 
   // We know the exponent is smaller than 30 (biased).  If it is less than
   // 0 (biased) then the number is smaller in magnitude than 1.0 * 2^0, ie
   // it rounds to zero.
   const uint32_t zero_exponent =
       (HeapNumber::kExponentBias + 0) << HeapNumber::kExponentShift;
   __ sub(scratch2, scratch2, Operand(zero_exponent), SetCC);
   // Dest already has a Smi zero.
   __ b(lt, &done);
-  if (!CpuFeatures::IsSupported(CpuFeatures::VFP3)) {
+  if (!CpuFeatures::IsSupported(VFP3)) {
     // We have a shifted exponent between 0 and 30 in scratch2.
     __ mov(dest, Operand(scratch2, LSR, HeapNumber::kExponentShift));
     // We now have the exponent in dest.  Subtract from 30 to get
     // how much to shift down.
     __ rsb(dest, dest, Operand(30));
   }
   __ bind(&right_exponent);
-  if (CpuFeatures::IsSupported(CpuFeatures::VFP3)) {
-    CpuFeatures::Scope scope(CpuFeatures::VFP3);
+  if (CpuFeatures::IsSupported(VFP3)) {
+    CpuFeatures::Scope scope(VFP3);
     // ARMv7 VFP3 instructions implementing double precision to integer
     // conversion using round to zero.
     __ ldr(scratch2, FieldMemOperand(source, HeapNumber::kMantissaOffset));
     __ fmdrr(d7, scratch2, scratch);
     __ ftosid(s15, d7);
     __ fmrs(dest, s15);
   } else {
     // Get the top bits of the mantissa.
     __ and_(scratch2, scratch, Operand(HeapNumber::kMantissaMask));
     // Put back the implicit 1.
@@ skipping 1117 matching lines @@
 int CompareStub::MinorKey() {
   // Encode the two parameters in a unique 16 bit value.
   ASSERT(static_cast<unsigned>(cc_) >> 28 < (1 << 15));
   return (static_cast<unsigned>(cc_) >> 27) | (strict_ ? 1 : 0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal