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/*
* Copyright (C) 2013-2015 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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 with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 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.
*/
#
include
"
config.h
"
#
include
"
FTLLocation.h
"
#
if
ENABLE(FTL_JIT)
#
include
"
B3ValueRep.h
"
#
include
"
FTLSaveRestore.h
"
#
include
"
RegisterSet.h
"
#
include
<
wtf/DataLog.h
>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace
JSC
{
namespace
FTL
{
using
namespace
B3
;
Location
Location::forValueRep
(
const
B3
::ValueRep& rep)
{
switch
(rep.
kind
()) {
case
B3
::ValueRep::Register:
return
forRegister
(rep.
reg
(),
0
);
case
B3
::ValueRep::Stack:
return
forIndirect
(GPRInfo::callFrameRegister, rep.
offsetFromFP
());
case
B3
::ValueRep::Constant:
return
forConstant
(rep.
value
());
default
:
RELEASE_ASSERT_NOT_REACHED
();
return
Location
();
}
}
void
Location::dump
(PrintStream& out)
const
{
out.
print
(
"
(
"
,
kind
());
if
(
hasReg
())
out.
print
(
"
,
"
,
reg
());
if
(
hasOffset
())
out.
print
(
"
,
"
,
offset
());
if
(
hasAddend
())
out.
print
(
"
,
"
,
addend
());
if
(
hasConstant
())
out.
print
(
"
,
"
,
constant
());
out.
print
(
"
)
"
);
}
bool
Location::involvesGPR
()
const
{
return
isGPR
() ||
kind
() == Indirect;
}
bool
Location::isGPR
()
const
{
return
kind
() == Register &&
reg
().
isGPR
();
}
GPRReg
Location::gpr
()
const
{
return
reg
().
gpr
();
}
bool
Location::isFPR
()
const
{
return
kind
() == Register &&
reg
().
isFPR
();
}
FPRReg
Location::fpr
()
const
{
return
reg
().
fpr
();
}
void
Location::restoreInto
(MacroAssembler& jit,
char
* savedRegisters, GPRReg result,
unsigned
numFramesToPop)
const
{
if
(
involvesGPR
() &&
RegisterSet::stackRegisters
().
contains
(
gpr
(), IgnoreVectors)) {
//
Make the result GPR contain the appropriate stack register.
if
(numFramesToPop) {
jit.
move
(MacroAssembler::framePointerRegister, result);
for
(
unsigned
i = numFramesToPop -
1
; i--;)
jit.
loadPtr
(
MacroAssembler::Address
(result), result);
if
(
gpr
() == MacroAssembler::framePointerRegister)
jit.
loadPtr
(
MacroAssembler::Address
(result), result);
else
jit.
addPtr
(
MacroAssembler::TrustedImmPtr
(
sizeof
(
void
*) *
2
), result);
}
else
jit.
move
(
gpr
(), result);
}
if
(
isGPR
()) {
if
(
RegisterSet::stackRegisters
().
contains
(
gpr
(), IgnoreVectors)) {
//
Already restored into result.
}
else
jit.
load64
(savedRegisters +
offsetOfGPR
(
gpr
()), result);
if
(
addend
())
jit.
add64
(
MacroAssembler::TrustedImm32
(
addend
()), result);
return
;
}
if
(
isFPR
()) {
jit.
load64
(savedRegisters +
offsetOfFPR
(
fpr
()), result);
ASSERT
(!
addend
());
return
;
}
switch
(
kind
()) {
case
Register:
//
B3 used some register that we don't know about!
dataLogLn
(
"
Unrecognized location:
"
, *
this
);
RELEASE_ASSERT_NOT_REACHED
();
return
;
case
Indirect:
if
(
RegisterSet::stackRegisters
().
contains
(
gpr
(), IgnoreVectors)) {
//
The stack register is already recovered into result.
jit.
load64
(
MacroAssembler::Address
(result,
offset
()), result);
return
;
}
jit.
load64
(savedRegisters +
offsetOfGPR
(
gpr
()), result);
jit.
load64
(
MacroAssembler::Address
(result,
offset
()), result);
return
;
case
Constant:
jit.
move
(
MacroAssembler::TrustedImm64
(
constant
()), result);
return
;
case
Unprocessed:
RELEASE_ASSERT_NOT_REACHED
();
return
;
}
RELEASE_ASSERT_NOT_REACHED
();
}
GPRReg
Location::directGPR
()
const
{
RELEASE_ASSERT
(!
addend
());
return
gpr
();
}
} }
//
namespace JSC::FTL
namespace
WTF
{
using
namespace
JSC
::
FTL
;
void
printInternal
(PrintStream& out,
JSC
::
FTL
::Location::Kind kind)
{
switch
(kind) {
case
Location::Unprocessed:
out.
print
(
"
Unprocessed
"
);
return
;
case
Location::Register:
out.
print
(
"
Register
"
);
return
;
case
Location::Indirect:
out.
print
(
"
Indirect
"
);
return
;
case
Location::Constant:
out.
print
(
"
Constant
"
);
return
;
}
RELEASE_ASSERT_NOT_REACHED
();
}
}
//
namespace WTF
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
#
endif
//
ENABLE(FTL_JIT)
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