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/*
* Copyright (C) 2009 University of Szeged
* 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 UNIVERSITY OF SZEGED ``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 UNIVERSITY OF SZEGED 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"
#if ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
#include "MacroAssemblerARM.h"
#if PLATFORM(LINUX)
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <elf.h>
#include <asm/hwcap.h>
#endif
namespace JSC {
static bool isVFPPresent()
{
#if PLATFORM(LINUX)
int fd = open("/proc/self/auxv", O_RDONLY);
if (fd > 0) {
Elf32_auxv_t aux;
while (read(fd, &aux, sizeof(Elf32_auxv_t))) {
if (aux.a_type == AT_HWCAP) {
close(fd);
return aux.a_un.a_val & HWCAP_VFP;
}
}
close(fd);
}
#endif
return false;
}
const bool MacroAssemblerARM::s_isVFPPresent = isVFPPresent();
#if defined(ARM_REQUIRE_NATURAL_ALIGNMENT) && ARM_REQUIRE_NATURAL_ALIGNMENT
void MacroAssemblerARM::load32WithUnalignedHalfWords(BaseIndex address, RegisterID dest)
{
ARMWord op2;
ASSERT(address.scale >= 0 && address.scale <= 3);
op2 = m_assembler.lsl(address.index, static_cast<int>(address.scale));
if (address.offset >= 0 && address.offset + 0x2 <= 0xff) {
m_assembler.add_r(ARMRegisters::S0, address.base, op2);
m_assembler.ldrh_u(dest, ARMRegisters::S0, ARMAssembler::getOp2Byte(address.offset));
m_assembler.ldrh_u(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::getOp2Byte(address.offset + 0x2));
} else if (address.offset < 0 && address.offset >= -0xff) {
m_assembler.add_r(ARMRegisters::S0, address.base, op2);
m_assembler.ldrh_d(dest, ARMRegisters::S0, ARMAssembler::getOp2Byte(-address.offset));
m_assembler.ldrh_d(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::getOp2Byte(-address.offset - 0x2));
} else {
m_assembler.ldr_un_imm(ARMRegisters::S0, address.offset);
m_assembler.add_r(ARMRegisters::S0, ARMRegisters::S0, op2);
m_assembler.ldrh_r(dest, address.base, ARMRegisters::S0);
m_assembler.add_r(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::OP2_IMM | 0x2);
m_assembler.ldrh_r(ARMRegisters::S0, address.base, ARMRegisters::S0);
}
m_assembler.orr_r(dest, dest, m_assembler.lsl(ARMRegisters::S0, 16));
}
#endif
}
#endif // ENABLE(ASSEMBLER) && PLATFORM(ARM_TRADITIONAL)
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