author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 01:32:07 +0300 | |
changeset 2 | 303757a437d3 |
parent 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (C) 2009 University of Szeged |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF SZEGED OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#include "config.h" |
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|
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#if ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL) |
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#include "MacroAssemblerARM.h" |
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#if OS(LINUX) |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <elf.h> |
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#include <asm/hwcap.h> |
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#endif |
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namespace JSC { |
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static bool isVFPPresent() |
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{ |
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#if OS(LINUX) |
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int fd = open("/proc/self/auxv", O_RDONLY); |
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if (fd > 0) { |
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Elf32_auxv_t aux; |
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while (read(fd, &aux, sizeof(Elf32_auxv_t))) { |
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if (aux.a_type == AT_HWCAP) { |
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close(fd); |
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return aux.a_un.a_val & HWCAP_VFP; |
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} |
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} |
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close(fd); |
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} |
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#endif |
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return false; |
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} |
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|
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const bool MacroAssemblerARM::s_isVFPPresent = isVFPPresent(); |
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|
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#if CPU(ARMV5_OR_LOWER) |
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/* On ARMv5 and below, natural alignment is required. */ |
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void MacroAssemblerARM::load32WithUnalignedHalfWords(BaseIndex address, RegisterID dest) |
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{ |
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ARMWord op2; |
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ASSERT(address.scale >= 0 && address.scale <= 3); |
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op2 = m_assembler.lsl(address.index, static_cast<int>(address.scale)); |
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if (address.offset >= 0 && address.offset + 0x2 <= 0xff) { |
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m_assembler.add_r(ARMRegisters::S0, address.base, op2); |
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m_assembler.ldrh_u(dest, ARMRegisters::S0, ARMAssembler::getOp2Byte(address.offset)); |
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m_assembler.ldrh_u(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::getOp2Byte(address.offset + 0x2)); |
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} else if (address.offset < 0 && address.offset >= -0xff) { |
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m_assembler.add_r(ARMRegisters::S0, address.base, op2); |
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m_assembler.ldrh_d(dest, ARMRegisters::S0, ARMAssembler::getOp2Byte(-address.offset)); |
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m_assembler.ldrh_d(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::getOp2Byte(-address.offset - 0x2)); |
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} else { |
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m_assembler.ldr_un_imm(ARMRegisters::S0, address.offset); |
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m_assembler.add_r(ARMRegisters::S0, ARMRegisters::S0, op2); |
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m_assembler.ldrh_r(dest, address.base, ARMRegisters::S0); |
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m_assembler.add_r(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::OP2_IMM | 0x2); |
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m_assembler.ldrh_r(ARMRegisters::S0, address.base, ARMRegisters::S0); |
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} |
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m_assembler.orr_r(dest, dest, m_assembler.lsl(ARMRegisters::S0, 16)); |
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} |
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#endif |
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} |
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#endif // ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL) |