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Diffstat (limited to 'js/src/jit/mips32/MacroAssembler-mips32-inl.h')
| -rw-r--r-- | js/src/jit/mips32/MacroAssembler-mips32-inl.h | 1077 |
1 files changed, 1077 insertions, 0 deletions
diff --git a/js/src/jit/mips32/MacroAssembler-mips32-inl.h b/js/src/jit/mips32/MacroAssembler-mips32-inl.h new file mode 100644 index 000000000..2dae8fb87 --- /dev/null +++ b/js/src/jit/mips32/MacroAssembler-mips32-inl.h @@ -0,0 +1,1077 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=8 sts=4 et sw=4 tw=99: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef jit_mips32_MacroAssembler_mips32_inl_h +#define jit_mips32_MacroAssembler_mips32_inl_h + +#include "jit/mips32/MacroAssembler-mips32.h" + +#include "jit/mips-shared/MacroAssembler-mips-shared-inl.h" + +namespace js { +namespace jit { + +//{{{ check_macroassembler_style + +void +MacroAssembler::move64(Register64 src, Register64 dest) +{ + move32(src.low, dest.low); + move32(src.high, dest.high); +} + +void +MacroAssembler::move64(Imm64 imm, Register64 dest) +{ + move32(Imm32(imm.value & 0xFFFFFFFFL), dest.low); + move32(Imm32((imm.value >> 32) & 0xFFFFFFFFL), dest.high); +} + +// =============================================================== +// Logical instructions + +void +MacroAssembler::andPtr(Register src, Register dest) +{ + ma_and(dest, src); +} + +void +MacroAssembler::andPtr(Imm32 imm, Register dest) +{ + ma_and(dest, imm); +} + +void +MacroAssembler::and64(Imm64 imm, Register64 dest) +{ + if (imm.low().value != int32_t(0xFFFFFFFF)) + and32(imm.low(), dest.low); + if (imm.hi().value != int32_t(0xFFFFFFFF)) + and32(imm.hi(), dest.high); +} + +void +MacroAssembler::and64(Register64 src, Register64 dest) +{ + and32(src.low, dest.low); + and32(src.high, dest.high); +} + +void +MacroAssembler::or64(Imm64 imm, Register64 dest) +{ + if (imm.low().value) + or32(imm.low(), dest.low); + if (imm.hi().value) + or32(imm.hi(), dest.high); +} + +void +MacroAssembler::xor64(Imm64 imm, Register64 dest) +{ + if (imm.low().value) + xor32(imm.low(), dest.low); + if (imm.hi().value) + xor32(imm.hi(), dest.high); +} + +void +MacroAssembler::orPtr(Register src, Register dest) +{ + ma_or(dest, src); +} + +void +MacroAssembler::orPtr(Imm32 imm, Register dest) +{ + ma_or(dest, imm); +} + +void +MacroAssembler::or64(Register64 src, Register64 dest) +{ + or32(src.low, dest.low); + or32(src.high, dest.high); +} + +void +MacroAssembler::xor64(Register64 src, Register64 dest) +{ + ma_xor(dest.low, src.low); + ma_xor(dest.high, src.high); +} + +void +MacroAssembler::xorPtr(Register src, Register dest) +{ + ma_xor(dest, src); +} + +void +MacroAssembler::xorPtr(Imm32 imm, Register dest) +{ + ma_xor(dest, imm); +} + +// =============================================================== +// Arithmetic functions + +void +MacroAssembler::addPtr(Register src, Register dest) +{ + ma_addu(dest, src); +} + +void +MacroAssembler::addPtr(Imm32 imm, Register dest) +{ + ma_addu(dest, imm); +} + +void +MacroAssembler::addPtr(ImmWord imm, Register dest) +{ + addPtr(Imm32(imm.value), dest); +} + +void +MacroAssembler::add64(Register64 src, Register64 dest) +{ + as_addu(dest.low, dest.low, src.low); + as_sltu(ScratchRegister, dest.low, src.low); + as_addu(dest.high, dest.high, src.high); + as_addu(dest.high, dest.high, ScratchRegister); +} + +void +MacroAssembler::add64(Imm32 imm, Register64 dest) +{ + ma_li(ScratchRegister, imm); + as_addu(dest.low, dest.low, ScratchRegister); + as_sltu(ScratchRegister, dest.low, ScratchRegister); + as_addu(dest.high, dest.high, ScratchRegister); +} + +void +MacroAssembler::add64(Imm64 imm, Register64 dest) +{ + add64(imm.low(), dest); + ma_addu(dest.high, dest.high, imm.hi()); +} + +void +MacroAssembler::subPtr(Register src, Register dest) +{ + as_subu(dest, dest, src); +} + +void +MacroAssembler::subPtr(Imm32 imm, Register dest) +{ + ma_subu(dest, dest, imm); +} + +void +MacroAssembler::sub64(Register64 src, Register64 dest) +{ + as_sltu(ScratchRegister, dest.low, src.low); + as_subu(dest.high, dest.high, ScratchRegister); + as_subu(dest.low, dest.low, src.low); + as_subu(dest.high, dest.high, src.high); +} + +void +MacroAssembler::sub64(Imm64 imm, Register64 dest) +{ + ma_li(ScratchRegister, imm.low()); + as_sltu(ScratchRegister, dest.low, ScratchRegister); + as_subu(dest.high, dest.high, ScratchRegister); + ma_subu(dest.low, dest.low, imm.low()); + ma_subu(dest.high, dest.high, imm.hi()); +} + +void +MacroAssembler::mul64(Imm64 imm, const Register64& dest) +{ + // LOW32 = LOW(LOW(dest) * LOW(imm)); + // HIGH32 = LOW(HIGH(dest) * LOW(imm)) [multiply imm into upper bits] + // + LOW(LOW(dest) * HIGH(imm)) [multiply dest into upper bits] + // + HIGH(LOW(dest) * LOW(imm)) [carry] + + // HIGH(dest) = LOW(HIGH(dest) * LOW(imm)); + ma_li(ScratchRegister, Imm32(imm.value & LOW_32_MASK)); + as_multu(dest.high, ScratchRegister); + as_mflo(dest.high); + + // mfhi:mflo = LOW(dest) * LOW(imm); + as_multu(dest.low, ScratchRegister); + + // HIGH(dest) += mfhi; + as_mfhi(ScratchRegister); + as_addu(dest.high, dest.high, ScratchRegister); + + if (((imm.value >> 32) & LOW_32_MASK) == 5) { + // Optimized case for Math.random(). + + // HIGH(dest) += LOW(LOW(dest) * HIGH(imm)); + as_sll(ScratchRegister, dest.low, 2); + as_addu(ScratchRegister, ScratchRegister, dest.low); + as_addu(dest.high, dest.high, ScratchRegister); + + // LOW(dest) = mflo; + as_mflo(dest.low); + } else { + // tmp = mflo + as_mflo(SecondScratchReg); + + // HIGH(dest) += LOW(LOW(dest) * HIGH(imm)); + ma_li(ScratchRegister, Imm32((imm.value >> 32) & LOW_32_MASK)); + as_multu(dest.low, ScratchRegister); + as_mflo(ScratchRegister); + as_addu(dest.high, dest.high, ScratchRegister); + + // LOW(dest) = tmp; + ma_move(dest.low, SecondScratchReg); + } +} + +void +MacroAssembler::mul64(Imm64 imm, const Register64& dest, const Register temp) +{ + // LOW32 = LOW(LOW(dest) * LOW(imm)); + // HIGH32 = LOW(HIGH(dest) * LOW(imm)) [multiply imm into upper bits] + // + LOW(LOW(dest) * HIGH(imm)) [multiply dest into upper bits] + // + HIGH(LOW(dest) * LOW(imm)) [carry] + + // HIGH(dest) = LOW(HIGH(dest) * LOW(imm)); + MOZ_ASSERT(temp != dest.high && temp != dest.low); + + ma_li(ScratchRegister, imm.firstHalf()); + as_multu(dest.high, ScratchRegister); + as_mflo(dest.high); + + ma_li(ScratchRegister, imm.secondHalf()); + as_multu(dest.low, ScratchRegister); + as_mflo(temp); + as_addu(temp, dest.high, temp); + + ma_li(ScratchRegister, imm.firstHalf()); + as_multu(dest.low, ScratchRegister); + as_mfhi(dest.high); + as_mflo(dest.low); + as_addu(dest.high, dest.high, temp); +} + +void +MacroAssembler::mul64(const Register64& src, const Register64& dest, const Register temp) +{ + // LOW32 = LOW(LOW(dest) * LOW(imm)); + // HIGH32 = LOW(HIGH(dest) * LOW(imm)) [multiply imm into upper bits] + // + LOW(LOW(dest) * HIGH(imm)) [multiply dest into upper bits] + // + HIGH(LOW(dest) * LOW(imm)) [carry] + + // HIGH(dest) = LOW(HIGH(dest) * LOW(imm)); + MOZ_ASSERT(dest != src); + MOZ_ASSERT(dest.low != src.high && dest.high != src.low); + + as_multu(dest.high, src.low); // (2) + as_mflo(dest.high); + as_multu(dest.low, src.high); // (3) + as_mflo(temp); + as_addu(temp, dest.high, temp); + as_multu(dest.low, src.low); // (4) + (1) + as_mfhi(dest.high); + as_mflo(dest.low); + as_addu(dest.high, dest.high, temp); +} + +void +MacroAssembler::neg64(Register64 reg) +{ + ma_li(ScratchRegister, Imm32(1)); + as_movz(ScratchRegister, zero, reg.low); + ma_negu(reg.low, reg.low); + as_addu(reg.high, reg.high, ScratchRegister); + ma_negu(reg.high, reg.high); +} + +void +MacroAssembler::mulBy3(Register src, Register dest) +{ + as_addu(dest, src, src); + as_addu(dest, dest, src); +} + +void +MacroAssembler::inc64(AbsoluteAddress dest) +{ + ma_li(ScratchRegister, Imm32((int32_t)dest.addr)); + as_lw(SecondScratchReg, ScratchRegister, 0); + + as_addiu(SecondScratchReg, SecondScratchReg, 1); + as_sw(SecondScratchReg, ScratchRegister, 0); + + as_sltiu(SecondScratchReg, SecondScratchReg, 1); + as_lw(ScratchRegister, ScratchRegister, 4); + + as_addu(SecondScratchReg, ScratchRegister, SecondScratchReg); + + ma_li(ScratchRegister, Imm32((int32_t)dest.addr)); + as_sw(SecondScratchReg, ScratchRegister, 4); +} + +// =============================================================== +// Shift functions + +void +MacroAssembler::lshiftPtr(Imm32 imm, Register dest) +{ + MOZ_ASSERT(0 <= imm.value && imm.value < 32); + ma_sll(dest, dest, imm); +} + +void +MacroAssembler::lshift64(Imm32 imm, Register64 dest) +{ + MOZ_ASSERT(0 <= imm.value && imm.value < 64); + ScratchRegisterScope scratch(*this); + + if (imm.value == 0) { + return; + } else if (imm.value < 32) { + as_sll(dest.high, dest.high, imm.value); + as_srl(scratch, dest.low, 32 - imm.value); + as_or(dest.high, dest.high, scratch); + as_sll(dest.low, dest.low, imm.value); + } else { + as_sll(dest.high, dest.low, imm.value - 32); + move32(Imm32(0), dest.low); + } +} + +void +MacroAssembler::lshift64(Register unmaskedShift, Register64 dest) +{ + Label done, less; + ScratchRegisterScope shift(*this); + + ma_and(shift, unmaskedShift, Imm32(0x3f)); + ma_b(shift, Imm32(0), &done, Equal); + + ma_sll(dest.high, dest.high, shift); + ma_subu(shift, shift, Imm32(32)); + ma_b(shift, Imm32(0), &less, LessThan); + + ma_sll(dest.high, dest.low, shift); + move32(Imm32(0), dest.low); + ma_b(&done); + + bind(&less); + ma_li(SecondScratchReg, Imm32(0)); + as_subu(shift, SecondScratchReg, shift); + ma_srl(SecondScratchReg, dest.low, shift); + as_or(dest.high, dest.high, SecondScratchReg); + ma_and(shift, unmaskedShift, Imm32(0x3f)); + ma_sll(dest.low, dest.low, shift); + + bind(&done); +} + +void +MacroAssembler::rshiftPtr(Imm32 imm, Register dest) +{ + MOZ_ASSERT(0 <= imm.value && imm.value < 32); + ma_srl(dest, dest, imm); +} + +void +MacroAssembler::rshiftPtrArithmetic(Imm32 imm, Register dest) +{ + MOZ_ASSERT(0 <= imm.value && imm.value < 32); + ma_sra(dest, dest, imm); +} + +void +MacroAssembler::rshift64(Imm32 imm, Register64 dest) +{ + MOZ_ASSERT(0 <= imm.value && imm.value < 64); + ScratchRegisterScope scratch(*this); + + if (imm.value < 32) { + as_srl(dest.low, dest.low, imm.value); + as_sll(scratch, dest.high, 32 - imm.value); + as_or(dest.low, dest.low, scratch); + as_srl(dest.high, dest.high, imm.value); + } else if (imm.value == 32) { + ma_move(dest.low, dest.high); + move32(Imm32(0), dest.high); + } else { + ma_srl(dest.low, dest.high, Imm32(imm.value - 32)); + move32(Imm32(0), dest.high); + } +} + +void +MacroAssembler::rshift64(Register unmaskedShift, Register64 dest) +{ + Label done, less; + ScratchRegisterScope shift(*this); + + ma_and(shift, unmaskedShift, Imm32(0x3f)); + ma_srl(dest.low, dest.low, shift); + ma_subu(shift, shift, Imm32(32)); + ma_b(shift, Imm32(0), &less, LessThan); + + ma_srl(dest.low, dest.high, shift); + move32(Imm32(0), dest.high); + ma_b(&done); + + bind(&less); + ma_li(SecondScratchReg, Imm32(0)); + as_subu(shift, SecondScratchReg, shift); + ma_sll(SecondScratchReg, dest.high, shift); + as_or(dest.low, dest.low, SecondScratchReg); + ma_and(shift, unmaskedShift, Imm32(0x3f)); + ma_srl(dest.high, dest.high, shift); + + bind(&done); +} + +void +MacroAssembler::rshift64Arithmetic(Imm32 imm, Register64 dest) +{ + MOZ_ASSERT(0 <= imm.value && imm.value < 64); + ScratchRegisterScope scratch(*this); + + if (imm.value < 32) { + as_srl(dest.low, dest.low, imm.value); + as_sll(scratch, dest.high, 32 - imm.value); + as_or(dest.low, dest.low, scratch); + as_sra(dest.high, dest.high, imm.value); + } else if (imm.value == 32) { + ma_move(dest.low, dest.high); + as_sra(dest.high, dest.high, 31); + } else { + as_sra(dest.low, dest.high, imm.value - 32); + as_sra(dest.high, dest.high, 31); + } +} + +void +MacroAssembler::rshift64Arithmetic(Register unmaskedShift, Register64 dest) +{ + Label done, less; + + ScratchRegisterScope shift(*this); + ma_and(shift, unmaskedShift, Imm32(0x3f)); + + ma_srl(dest.low, dest.low, shift); + ma_subu(shift, shift, Imm32(32)); + ma_b(shift, Imm32(0), &less, LessThan); + + ma_sra(dest.low, dest.high, shift); + as_sra(dest.high, dest.high, 31); + ma_b(&done); + + bind(&less); + ma_li(SecondScratchReg, Imm32(0)); + as_subu(shift, SecondScratchReg, shift); + ma_sll(SecondScratchReg, dest.high, shift); + as_or(dest.low, dest.low, SecondScratchReg); + ma_and(shift, unmaskedShift, Imm32(0x3f)); + ma_sra(dest.high, dest.high, shift); + + bind(&done); +} + +// =============================================================== +// Rotation functions + +void +MacroAssembler::rotateLeft64(Imm32 count, Register64 input, Register64 dest, Register temp) +{ + MOZ_ASSERT(temp == InvalidReg); + MOZ_ASSERT(input.low != dest.high && input.high != dest.low); + + int32_t amount = count.value & 0x3f; + if (amount > 32) { + rotateRight64(Imm32(64 - amount), input, dest, temp); + } else { + ScratchRegisterScope scratch(*this); + if (amount == 0) { + ma_move(dest.low, input.low); + ma_move(dest.high, input.high); + } else if (amount == 32) { + ma_move(scratch, input.low); + ma_move(dest.low, input.high); + ma_move(dest.high, scratch); + } else { + MOZ_ASSERT(0 < amount && amount < 32); + ma_move(scratch, input.high); + ma_sll(dest.high, input.high, Imm32(amount)); + ma_srl(SecondScratchReg, input.low, Imm32(32 - amount)); + as_or(dest.high, dest.high, SecondScratchReg); + ma_sll(dest.low, input.low, Imm32(amount)); + ma_srl(SecondScratchReg, scratch, Imm32(32 - amount)); + as_or(dest.low, dest.low, SecondScratchReg); + + } + } +} + +void +MacroAssembler::rotateLeft64(Register shift, Register64 src, Register64 dest, Register temp) +{ + MOZ_ASSERT(temp != src.low && temp != src.high); + MOZ_ASSERT(shift != src.low && shift != src.high); + MOZ_ASSERT(temp != InvalidReg); + + ScratchRegisterScope shift_value(*this); + Label high, done, zero; + + ma_and(temp, shift, Imm32(0x3f)); + ma_b(temp, Imm32(32), &high, GreaterThanOrEqual); + + // high = high << shift | low >> 32 - shift + // low = low << shift | high >> 32 - shift + ma_sll(dest.high, src.high, temp); + ma_b(temp, Imm32(0), &zero, Equal); + ma_li(SecondScratchReg, Imm32(32)); + as_subu(shift_value, SecondScratchReg, temp); + + ma_srl(SecondScratchReg, src.low, shift_value); + as_or(dest.high, dest.high, SecondScratchReg); + + ma_sll(dest.low, src.low, temp); + ma_srl(SecondScratchReg, src.high, shift_value); + as_or(dest.low, dest.low, SecondScratchReg); + ma_b(&done); + + bind(&zero); + ma_move(dest.low, src.low); + ma_move(dest.high, src.high); + ma_b(&done); + + // A 32 - 64 shift is a 0 - 32 shift in the other direction. + bind(&high); + ma_and(shift, shift, Imm32(0x3f)); + ma_li(SecondScratchReg, Imm32(64)); + as_subu(temp, SecondScratchReg, shift); + + ma_srl(dest.high, src.high, temp); + ma_li(SecondScratchReg, Imm32(32)); + as_subu(shift_value, SecondScratchReg, temp); + ma_sll(SecondScratchReg, src.low, shift_value); + as_or(dest.high, dest.high, SecondScratchReg); + + ma_srl(dest.low, src.low, temp); + ma_sll(SecondScratchReg, src.high, shift_value); + as_or(dest.low, dest.low, SecondScratchReg); + + bind(&done); +} + +void +MacroAssembler::rotateRight64(Imm32 count, Register64 input, Register64 dest, Register temp) +{ + MOZ_ASSERT(temp == InvalidReg); + MOZ_ASSERT(input.low != dest.high && input.high != dest.low); + + int32_t amount = count.value & 0x3f; + if (amount > 32) { + rotateLeft64(Imm32(64 - amount), input, dest, temp); + } else { + ScratchRegisterScope scratch(*this); + if (amount == 0) { + ma_move(dest.low, input.low); + ma_move(dest.high, input.high); + } else if (amount == 32) { + ma_move(scratch, input.low); + ma_move(dest.low, input.high); + ma_move(dest.high, scratch); + } else { + MOZ_ASSERT(0 < amount && amount < 32); + ma_move(scratch, input.high); + ma_srl(dest.high, input.high, Imm32(amount)); + ma_sll(SecondScratchReg, input.low, Imm32(32 - amount)); + as_or(dest.high, dest.high, SecondScratchReg); + ma_srl(dest.low, input.low, Imm32(amount)); + ma_sll(SecondScratchReg, scratch, Imm32(32 - amount)); + as_or(dest.low, dest.low, SecondScratchReg); + } + } +} + +void +MacroAssembler::rotateRight64(Register shift, Register64 src, Register64 dest, Register temp) +{ + MOZ_ASSERT(temp != src.low && temp != src.high); + MOZ_ASSERT(shift != src.low && shift != src.high); + MOZ_ASSERT(temp != InvalidReg); + + ScratchRegisterScope shift_value(*this); + Label high, done, zero; + + ma_and(temp, shift, Imm32(0x3f)); + ma_b(temp, Imm32(32), &high, GreaterThanOrEqual); + + // high = high >> shift | low << 32 - shift + // low = low >> shift | high << 32 - shift + ma_srl(dest.high, src.high, temp); + ma_b(temp, Imm32(0), &zero, Equal); + ma_li(SecondScratchReg, Imm32(32)); + as_subu(shift_value, SecondScratchReg, temp); + + ma_sll(SecondScratchReg, src.low, shift_value); + as_or(dest.high, dest.high, SecondScratchReg); + + ma_srl(dest.low, src.low, temp); + + //ma_li(SecondScratchReg, Imm32(32)); + //as_subu(shift_value, SecondScratchReg, shift_value); + ma_sll(SecondScratchReg, src.high, shift_value); + as_or(dest.low, dest.low, SecondScratchReg); + + ma_b(&done); + + bind(&zero); + ma_move(dest.low, src.low); + ma_move(dest.high, src.high); + ma_b(&done); + + // A 32 - 64 shift is a 0 - 32 shift in the other direction. + bind(&high); + ma_and(shift, shift, Imm32(0x3f)); + ma_li(SecondScratchReg, Imm32(64)); + as_subu(temp, SecondScratchReg, shift); + + ma_sll(dest.high, src.high, temp); + ma_li(SecondScratchReg, Imm32(32)); + as_subu(shift_value, SecondScratchReg, temp); + + ma_srl(SecondScratchReg, src.low, shift_value); + as_or(dest.high, dest.high, SecondScratchReg); + + ma_sll(dest.low, src.low, temp); + ma_srl(SecondScratchReg, src.high, shift_value); + as_or(dest.low, dest.low, SecondScratchReg); + + bind(&done); +} + +template <typename T1, typename T2> +void +MacroAssembler::cmpPtrSet(Condition cond, T1 lhs, T2 rhs, Register dest) +{ + ma_cmp_set(dest, lhs, rhs, cond); +} + +template <typename T1, typename T2> +void +MacroAssembler::cmp32Set(Condition cond, T1 lhs, T2 rhs, Register dest) +{ + ma_cmp_set(dest, lhs, rhs, cond); +} + +// =============================================================== +// Bit counting functions + +void +MacroAssembler::clz64(Register64 src, Register dest) +{ + Label done, low; + + ma_b(src.high, Imm32(0), &low, Equal); + as_clz(dest, src.high); + ma_b(&done); + + bind(&low); + as_clz(dest, src.low); + ma_addu(dest, Imm32(32)); + + bind(&done); +} + +void +MacroAssembler::ctz64(Register64 src, Register dest) +{ + Label done, high; + + ma_b(src.low, Imm32(0), &high, Equal); + + ma_ctz(dest, src.low); + ma_b(&done); + + bind(&high); + ma_ctz(dest, src.high); + ma_addu(dest, Imm32(32)); + + bind(&done); +} + +void +MacroAssembler::popcnt64(Register64 src, Register64 dest, Register tmp) +{ + MOZ_ASSERT(dest.low != tmp); + MOZ_ASSERT(dest.high != tmp); + MOZ_ASSERT(dest.low != dest.high); + + if (dest.low != src.high) { + popcnt32(src.low, dest.low, tmp); + popcnt32(src.high, dest.high, tmp); + } else { + MOZ_ASSERT(dest.high != src.high); + popcnt32(src.low, dest.high, tmp); + popcnt32(src.high, dest.low, tmp); + } + + ma_addu(dest.low, dest.high); + move32(Imm32(0), dest.high); +} + +// =============================================================== +// Branch functions + +void +MacroAssembler::branch64(Condition cond, const Address& lhs, Imm64 val, Label* label) +{ + MOZ_ASSERT(cond == Assembler::NotEqual, + "other condition codes not supported"); + + branch32(cond, lhs, val.firstHalf(), label); + branch32(cond, Address(lhs.base, lhs.offset + sizeof(uint32_t)), val.secondHalf(), label); +} + +void +MacroAssembler::branch64(Condition cond, const Address& lhs, const Address& rhs, Register scratch, + Label* label) +{ + MOZ_ASSERT(cond == Assembler::NotEqual, + "other condition codes not supported"); + MOZ_ASSERT(lhs.base != scratch); + MOZ_ASSERT(rhs.base != scratch); + + load32(rhs, scratch); + branch32(cond, lhs, scratch, label); + + load32(Address(rhs.base, rhs.offset + sizeof(uint32_t)), scratch); + branch32(cond, Address(lhs.base, lhs.offset + sizeof(uint32_t)), scratch, label); +} + +void +MacroAssembler::branch64(Condition cond, Register64 lhs, Imm64 val, Label* success, Label* fail) +{ + bool fallthrough = false; + Label fallthroughLabel; + + if (!fail) { + fail = &fallthroughLabel; + fallthrough = true; + } + + switch(cond) { + case Assembler::Equal: + branch32(Assembler::NotEqual, lhs.low, val.low(), fail); + branch32(Assembler::Equal, lhs.high, val.hi(), success); + if (!fallthrough) + jump(fail); + break; + case Assembler::NotEqual: + branch32(Assembler::NotEqual, lhs.low, val.low(), success); + branch32(Assembler::NotEqual, lhs.high, val.hi(), success); + if (!fallthrough) + jump(fail); + break; + case Assembler::LessThan: + case Assembler::LessThanOrEqual: + case Assembler::GreaterThan: + case Assembler::GreaterThanOrEqual: + case Assembler::Below: + case Assembler::BelowOrEqual: + case Assembler::Above: + case Assembler::AboveOrEqual: { + Assembler::Condition invert_cond = Assembler::InvertCondition(cond); + Assembler::Condition cond1 = Assembler::ConditionWithoutEqual(cond); + Assembler::Condition cond2 = Assembler::ConditionWithoutEqual(invert_cond); + Assembler::Condition cond3 = Assembler::UnsignedCondition(cond); + + ma_b(lhs.high, val.hi(), success, cond1); + ma_b(lhs.high, val.hi(), fail, cond2); + ma_b(lhs.low, val.low(), success, cond3); + if (!fallthrough) + jump(fail); + break; + } + default: + MOZ_CRASH("Condition code not supported"); + break; + } + + if (fallthrough) + bind(fail); +} + +void +MacroAssembler::branch64(Condition cond, Register64 lhs, Register64 rhs, Label* success, Label* fail) +{ + bool fallthrough = false; + Label fallthroughLabel; + + if (!fail) { + fail = &fallthroughLabel; + fallthrough = true; + } + + switch(cond) { + case Assembler::Equal: + branch32(Assembler::NotEqual, lhs.low, rhs.low, fail); + branch32(Assembler::Equal, lhs.high, rhs.high, success); + if (!fallthrough) + jump(fail); + break; + case Assembler::NotEqual: + branch32(Assembler::NotEqual, lhs.low, rhs.low, success); + branch32(Assembler::NotEqual, lhs.high, rhs.high, success); + if (!fallthrough) + jump(fail); + break; + case Assembler::LessThan: + case Assembler::LessThanOrEqual: + case Assembler::GreaterThan: + case Assembler::GreaterThanOrEqual: + case Assembler::Below: + case Assembler::BelowOrEqual: + case Assembler::Above: + case Assembler::AboveOrEqual: { + Assembler::Condition invert_cond = Assembler::InvertCondition(cond); + Assembler::Condition cond1 = Assembler::ConditionWithoutEqual(cond); + Assembler::Condition cond2 = Assembler::ConditionWithoutEqual(invert_cond); + Assembler::Condition cond3 = Assembler::UnsignedCondition(cond); + + ma_b(lhs.high, rhs.high, success, cond1); + ma_b(lhs.high, rhs.high, fail, cond2); + ma_b(lhs.low, rhs.low, success, cond3); + if (!fallthrough) + jump(fail); + break; + } + default: + MOZ_CRASH("Condition code not supported"); + break; + } + + if (fallthrough) + bind(fail); +} + +void +MacroAssembler::branchPrivatePtr(Condition cond, const Address& lhs, Register rhs, Label* label) +{ + branchPtr(cond, lhs, rhs, label); +} + +template <class L> +void +MacroAssembler::branchTest64(Condition cond, Register64 lhs, Register64 rhs, Register temp, + L label) +{ + if (cond == Assembler::Zero) { + MOZ_ASSERT(lhs.low == rhs.low); + MOZ_ASSERT(lhs.high == rhs.high); + as_or(ScratchRegister, lhs.low, lhs.high); + branchTestPtr(cond, ScratchRegister, ScratchRegister, label); + } else { + MOZ_CRASH("Unsupported condition"); + } +} + +void +MacroAssembler::branchTestUndefined(Condition cond, const ValueOperand& value, Label* label) +{ + branchTestUndefined(cond, value.typeReg(), label); +} + +void +MacroAssembler::branchTestInt32(Condition cond, const ValueOperand& value, Label* label) +{ + branchTestInt32(cond, value.typeReg(), label); +} + +void +MacroAssembler::branchTestInt32Truthy(bool b, const ValueOperand& value, Label* label) +{ + ScratchRegisterScope scratch(*this); + as_and(scratch, value.payloadReg(), value.payloadReg()); + ma_b(scratch, scratch, label, b ? NonZero : Zero); +} + +void +MacroAssembler::branchTestDouble(Condition cond, Register tag, Label* label) +{ + MOZ_ASSERT(cond == Equal || cond == NotEqual); + Condition actual = (cond == Equal) ? Below : AboveOrEqual; + ma_b(tag, ImmTag(JSVAL_TAG_CLEAR), label, actual); +} + +void +MacroAssembler::branchTestDouble(Condition cond, const ValueOperand& value, Label* label) +{ + branchTestDouble(cond, value.typeReg(), label); +} + +void +MacroAssembler::branchTestNumber(Condition cond, const ValueOperand& value, Label* label) +{ + branchTestNumber(cond, value.typeReg(), label); +} + +void +MacroAssembler::branchTestBoolean(Condition cond, const ValueOperand& value, Label* label) +{ + MOZ_ASSERT(cond == Equal || cond == NotEqual); + ma_b(value.typeReg(), ImmType(JSVAL_TYPE_BOOLEAN), label, cond); +} + +void +MacroAssembler::branchTestBooleanTruthy(bool b, const ValueOperand& value, Label* label) +{ + ma_b(value.payloadReg(), value.payloadReg(), label, b ? NonZero : Zero); +} + +void +MacroAssembler::branchTestString(Condition cond, const ValueOperand& value, Label* label) +{ + branchTestString(cond, value.typeReg(), label); +} + +void +MacroAssembler::branchTestStringTruthy(bool b, const ValueOperand& value, Label* label) +{ + Register string = value.payloadReg(); + SecondScratchRegisterScope scratch2(*this); + ma_lw(scratch2, Address(string, JSString::offsetOfLength())); + ma_b(scratch2, Imm32(0), label, b ? NotEqual : Equal); +} + +void +MacroAssembler::branchTestSymbol(Condition cond, const ValueOperand& value, Label* label) +{ + branchTestSymbol(cond, value.typeReg(), label); +} + +void +MacroAssembler::branchTestNull(Condition cond, const ValueOperand& value, Label* label) +{ + branchTestNull(cond, value.typeReg(), label); +} + +void +MacroAssembler::branchTestObject(Condition cond, const ValueOperand& value, Label* label) +{ + branchTestObject(cond, value.typeReg(), label); +} + +void +MacroAssembler::branchTestPrimitive(Condition cond, const ValueOperand& value, Label* label) +{ + branchTestPrimitive(cond, value.typeReg(), label); +} + +template <class L> +void +MacroAssembler::branchTestMagic(Condition cond, const ValueOperand& value, L label) +{ + ma_b(value.typeReg(), ImmTag(JSVAL_TAG_MAGIC), label, cond); +} + +void +MacroAssembler::branchTestMagic(Condition cond, const Address& valaddr, JSWhyMagic why, Label* label) +{ + branchTestMagic(cond, valaddr, label); + branch32(cond, ToPayload(valaddr), Imm32(why), label); +} + +// ======================================================================== +// Memory access primitives. +void +MacroAssembler::storeUncanonicalizedDouble(FloatRegister src, const Address& addr) +{ + ma_sd(src, addr); +} +void +MacroAssembler::storeUncanonicalizedDouble(FloatRegister src, const BaseIndex& addr) +{ + MOZ_ASSERT(addr.offset == 0); + ma_sd(src, addr); +} + +void +MacroAssembler::storeUncanonicalizedFloat32(FloatRegister src, const Address& addr) +{ + ma_ss(src, addr); +} +void +MacroAssembler::storeUncanonicalizedFloat32(FloatRegister src, const BaseIndex& addr) +{ + MOZ_ASSERT(addr.offset == 0); + ma_ss(src, addr); +} + +// ======================================================================== +// wasm support + +template <class L> +void +MacroAssembler::wasmBoundsCheck(Condition cond, Register index, L label) +{ + BufferOffset bo = ma_BoundsCheck(ScratchRegister); + append(wasm::BoundsCheck(bo.getOffset())); + + ma_b(index, ScratchRegister, label, cond); +} + +void +MacroAssembler::wasmPatchBoundsCheck(uint8_t* patchAt, uint32_t limit) +{ + Instruction* inst = (Instruction*) patchAt; + InstImm* i0 = (InstImm*) inst; + InstImm* i1 = (InstImm*) i0->next(); + + // Replace with new value + Assembler::UpdateLuiOriValue(i0, i1, limit); +} + +//}}} check_macroassembler_style +// =============================================================== + +void +MacroAssemblerMIPSCompat::incrementInt32Value(const Address& addr) +{ + asMasm().add32(Imm32(1), ToPayload(addr)); +} + +void +MacroAssemblerMIPSCompat::computeEffectiveAddress(const BaseIndex& address, Register dest) +{ + computeScaledAddress(address, dest); + if (address.offset) + asMasm().addPtr(Imm32(address.offset), dest); +} + +void +MacroAssemblerMIPSCompat::retn(Imm32 n) { + // pc <- [sp]; sp += n + loadPtr(Address(StackPointer, 0), ra); + asMasm().addPtr(n, StackPointer); + as_jr(ra); + as_nop(); +} + +} // namespace jit +} // namespace js + +#endif /* jit_mips32_MacroAssembler_mips32_inl_h */ |