namespace JSC {
static bool isVFPPresent()
{
#if OS(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
#if (COMPILER(RVCT) && defined(__TARGET_FPU_VFP)) || (COMPILER(GCC) && defined(__VFP_FP__))
return true;
#else
return false;
#endif
}
const bool MacroAssemblerARM::s_isVFPPresent = isVFPPresent();
#if CPU(ARMV5_OR_LOWER)
/* On ARMv5 and below, natural alignment is required. */
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(ARMRegisters::S0, address.base, op2);
m_assembler.halfDtrUp(ARMAssembler::LoadUint16, dest, ARMRegisters::S0, ARMAssembler::getOp2Half(address.offset));
m_assembler.halfDtrUp(ARMAssembler::LoadUint16, ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::getOp2Half(address.offset + 0x2));
} else if (address.offset < 0 && address.offset >= -0xff) {
m_assembler.add(ARMRegisters::S0, address.base, op2);
m_assembler.halfDtrDown(ARMAssembler::LoadUint16, dest, ARMRegisters::S0, ARMAssembler::getOp2Half(-address.offset));
m_assembler.halfDtrDown(ARMAssembler::LoadUint16, ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::getOp2Half(-address.offset - 0x2));
} else {
m_assembler.moveImm(address.offset, ARMRegisters::S0);
m_assembler.add(ARMRegisters::S0, ARMRegisters::S0, op2);
m_assembler.halfDtrUpRegister(ARMAssembler::LoadUint16, dest, address.base, ARMRegisters::S0);
m_assembler.add(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::Op2Immediate | 0x2);
m_assembler.halfDtrUpRegister(ARMAssembler::LoadUint16, ARMRegisters::S0, address.base, ARMRegisters::S0);
}
m_assembler.orr(dest, dest, m_assembler.lsl(ARMRegisters::S0, 16));
}
#endif
}
namespace JSC {
static bool isVFPPresent()
{
#if WTF_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 WTF_CPU_ARMV5_OR_LOWER
/* On ARMv5 and below, natural alignment is required. */
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
}
close(fd);
return aux.a_un.a_val & HWCAP_VFP;
}
}
close(fd);
}
#endif // OS(LINUX)
#if (COMPILER(GCC) && defined(__VFP_FP__))
return true;
#else
return false;
#endif
}
const bool MacroAssemblerARM::s_isVFPPresent = isVFPPresent();
#if CPU(ARMV5_OR_LOWER)
/* On ARMv5 and below, natural alignment is required. */
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(ARMRegisters::S0, address.base, op2);
m_assembler.halfDtrUp(ARMAssembler::LoadUint16, dest, ARMRegisters::S0, ARMAssembler::getOp2Half(address.offset));
m_assembler.halfDtrUp(ARMAssembler::LoadUint16, ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::getOp2Half(address.offset + 0x2));
} else if (address.offset < 0 && address.offset >= -0xff) {
namespace JSC {
static bool isVFPPresent()
{
#if OS(LINUX)
int fd = open("/proc/self/auxv", O_RDONLY);
if (fd != -1) {
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 // OS(LINUX)
#if (COMPILER(GCC_OR_CLANG) && defined(__VFP_FP__))
return true;
#else
return false;
#endif
}
const bool MacroAssemblerARM::s_isVFPPresent = isVFPPresent();
#if CPU(ARMV5_OR_LOWER)
/* On ARMv5 and below, natural alignment is required. */
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(ARMRegisters::S0, address.base, op2);
m_assembler.halfDtrUp(ARMAssembler::LoadUint16, dest, ARMRegisters::S0, ARMAssembler::getOp2Half(address.offset));
m_assembler.halfDtrUp(ARMAssembler::LoadUint16, ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::getOp2Half(address.offset + 0x2));
} else if (address.offset < 0 && address.offset >= -0xff) {
m_assembler.add(ARMRegisters::S0, address.base, op2);
m_assembler.halfDtrDown(ARMAssembler::LoadUint16, dest, ARMRegisters::S0, ARMAssembler::getOp2Half(-address.offset));
m_assembler.halfDtrDown(ARMAssembler::LoadUint16, ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::getOp2Half(-address.offset - 0x2));
} else {
m_assembler.moveImm(address.offset, ARMRegisters::S0);
m_assembler.add(ARMRegisters::S0, ARMRegisters::S0, op2);
m_assembler.halfDtrUpRegister(ARMAssembler::LoadUint16, dest, address.base, ARMRegisters::S0);
m_assembler.add(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::Op2Immediate | 0x2);
m_assembler.halfDtrUpRegister(ARMAssembler::LoadUint16, ARMRegisters::S0, address.base, ARMRegisters::S0);
}
m_assembler.orr(dest, dest, m_assembler.lsl(ARMRegisters::S0, 16));
}
#endif // CPU(ARMV5_OR_LOWER)
#if ENABLE(MASM_PROBE)
extern "C" void ctiMasmProbeTrampoline();
// For details on "What code is emitted for the probe?" and "What values are in
// the saved registers?", see comment for MacroAssemblerX86Common::probe() in
// MacroAssemblerX86Common.cpp.
void MacroAssemblerARM::probe(MacroAssemblerARM::ProbeFunction function, void* arg1, void* arg2)
{
push(RegisterID::sp);
push(RegisterID::lr);
push(RegisterID::ip);
push(RegisterID::S0);
// The following uses RegisterID::S0. So, they must come after we push S0 above.
push(trustedImm32FromPtr(arg2));
push(trustedImm32FromPtr(arg1));
push(trustedImm32FromPtr(function));
move(trustedImm32FromPtr(ctiMasmProbeTrampoline), RegisterID::S0);
m_assembler.blx(RegisterID::S0);
}
#endif // ENABLE(MASM_PROBE)
} // namespace JSC