ftl/FTLValueFormat.cpp

   1 /*
   2  * Copyright (C) 2013, 2014 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "FTLValueFormat.h"
  28
  29 #if ENABLE(FTL_JIT)
  30
  31 #include "AssemblyHelpers.h"
  32
  33 namespace JSC { namespace FTL {
  34
  35 void reboxAccordingToFormat(
  36     ValueFormat format, AssemblyHelpers& jit, GPRReg value, GPRReg scratch1, GPRReg scratch2)
  37 {
  38     switch (format) {
  39     case ValueFormatInt32: {
  40         jit.zeroExtend32ToPtr(value, value);
  41         jit.or64(GPRInfo::tagTypeNumberRegister, value);
  42         break;
  43     }
  44
  45     case ValueFormatInt52: {
  46         jit.rshift64(AssemblyHelpers::TrustedImm32(JSValue::int52ShiftAmount), value);
  47         jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch2);
  48         jit.boxInt52(value, value, scratch1, FPRInfo::fpRegT0);
  49         jit.move64ToDouble(scratch2, FPRInfo::fpRegT0);
  50         break;
  51     }
  52
  53     case ValueFormatStrictInt52: {
  54         jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch2);
  55         jit.boxInt52(value, value, scratch1, FPRInfo::fpRegT0);
  56         jit.move64ToDouble(scratch2, FPRInfo::fpRegT0);
  57         break;
  58     }
  59
  60     case ValueFormatBoolean: {
  61         jit.zeroExtend32ToPtr(value, value);
  62         jit.or32(MacroAssembler::TrustedImm32(ValueFalse), value);
  63         break;
  64     }
  65
  66     case ValueFormatJSValue: {
  67         // Done already!
  68         break;
  69     }
  70
  71     case ValueFormatDouble: {
  72         jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch1);
  73         jit.move64ToDouble(value, FPRInfo::fpRegT0);
  74         jit.purifyNaN(FPRInfo::fpRegT0);
  75         jit.boxDouble(FPRInfo::fpRegT0, value);
  76         jit.move64ToDouble(scratch1, FPRInfo::fpRegT0);
  77         break;
  78     }
  79
  80     default:
  81         RELEASE_ASSERT_NOT_REACHED();
  82         break;
  83     }
  84 }
  85
  86 } } // namespace JSC::FTL
  87
  88 namespace WTF {
  89
  90 using namespace JSC::FTL;
  91
  92 void printInternal(PrintStream& out, ValueFormat format)
  93 {
  94     switch (format) {
  95     case InvalidValueFormat:
  96         out.print("Invalid");
  97         return;
  98     case ValueFormatInt32:
  99         out.print("Int32");
 100         return;
 101     case ValueFormatInt52:
 102         out.print("Int52");
 103         return;
 104     case ValueFormatStrictInt52:
 105         out.print("StrictInt52");
 106         return;
 107     case ValueFormatBoolean:
 108         out.print("Boolean");
 109         return;
 110     case ValueFormatJSValue:
 111         out.print("JSValue");
 112         return;
 113     case ValueFormatDouble:
 114         out.print("Double");
 115         return;
 116     }
 117
 118     RELEASE_ASSERT_NOT_REACHED();
 119 }
 120
 121 } // namespace WTF
 122
 123 #endif // ENABLE(FTL_JIT)
 124