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[/] [ao486/] [trunk/] [bochs486/] [cpu/] [arith8.cc] - Rev 2
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///////////////////////////////////////////////////////////////////////// // $Id: arith8.cc 11313 2012-08-05 13:52:40Z sshwarts $ ///////////////////////////////////////////////////////////////////////// // // Copyright (C) 2001-2012 The Bochs Project // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Lesser General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA ///////////////////////////////////////////////////////////////////////// #define NEED_CPU_REG_SHORTCUTS 1 #include "bochs.h" #include "cpu.h" #define LOG_THIS BX_CPU_THIS_PTR BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_EbGbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u op2 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u sum = op1 + op2; write_RMW_virtual_byte(sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_GbEbR(bxInstruction_c *i) { Bit32u op1 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u sum = op1 + op2; BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_GbEbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2 = read_virtual_byte(i->seg(), eaddr); Bit32u sum = op1 + op2; BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_EbGbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u op2 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u sum = op1 + op2 + getB_CF(); write_RMW_virtual_byte(sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_GbEbR(bxInstruction_c *i) { Bit32u op1 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u sum = op1 + op2 + getB_CF(); BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_GbEbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2 = read_virtual_byte(i->seg(), eaddr); Bit32u sum = op1 + op2 + getB_CF(); BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_EbGbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u op2_8 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u diff_8 = op1_8 - (op2_8 + getB_CF()); write_RMW_virtual_byte(diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_GbEbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2_8 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u diff_8 = op1_8 - (op2_8 + getB_CF()); BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_GbEbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2_8 = read_virtual_byte(i->seg(), eaddr); Bit32u diff_8 = op1_8 - (op2_8 + getB_CF()); BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_EbIbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u op2_8 = i->Ib(); Bit32u diff_8 = op1_8 - (op2_8 + getB_CF()); write_RMW_virtual_byte(diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_EbIbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2_8 = i->Ib(); Bit32u diff_8 = op1_8 - (op2_8 + getB_CF()); BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_EbGbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u op2_8 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u diff_8 = op1_8 - op2_8; write_RMW_virtual_byte(diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_GbEbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2_8 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u diff_8 = op1_8 - op2_8; BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_GbEbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2_8 = read_virtual_byte(i->seg(), eaddr); Bit32u diff_8 = op1_8 - op2_8; BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_EbGbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_virtual_byte(i->seg(), eaddr); Bit32u op2_8 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u diff_8 = op1_8 - op2_8; SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_GbEbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2_8 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u diff_8 = op1_8 - op2_8; SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_GbEbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2_8 = read_virtual_byte(i->seg(), eaddr); Bit32u diff_8 = op1_8 - op2_8; SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::XADD_EbGbM(bxInstruction_c *i) { /* XADD dst(r/m8), src(r8) * temp <-- src + dst | sum = op2 + op1 * src <-- dst | op2 = op1 * dst <-- tmp | op1 = sum */ bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u op2 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u sum = op1 + op2; write_RMW_virtual_byte(sum); /* and write destination into source */ BX_WRITE_8BIT_REGx(i->src(), i->extend8bitL(), op1); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::XADD_EbGbR(bxInstruction_c *i) { /* XADD dst(r/m8), src(r8) * temp <-- src + dst | sum = op2 + op1 * src <-- dst | op2 = op1 * dst <-- tmp | op1 = sum */ Bit32u op1 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); Bit32u sum = op1 + op2; // and write destination into source // Note: if both op1 & op2 are registers, the last one written // should be the sum, as op1 & op2 may be the same register. // For example: XADD AL, AL BX_WRITE_8BIT_REGx(i->src(), i->extend8bitL(), op1); BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_EbIbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u op2 = i->Ib(); Bit32u sum = op1 + op2; write_RMW_virtual_byte(sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_EbIbR(bxInstruction_c *i) { Bit32u op1 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2 = i->Ib(); Bit32u sum = op1 + op2; BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_EbIbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u op2 = i->Ib(); Bit32u sum = op1 + op2 + getB_CF(); write_RMW_virtual_byte(sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_EbIbR(bxInstruction_c *i) { Bit32u op1 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2 = i->Ib(); Bit32u sum = op1 + op2 + getB_CF(); BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), sum); SET_FLAGS_OSZAPC_ADD_8(op1, op2, sum); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_EbIbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u op2_8 = i->Ib(); Bit32u diff_8 = op1_8 - op2_8; write_RMW_virtual_byte(diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_EbIbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2_8 = i->Ib(); Bit32u diff_8 = op1_8 - op2_8; BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), diff_8); SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_EbIbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_virtual_byte(i->seg(), eaddr); Bit32u op2_8 = i->Ib(); Bit32u diff_8 = op1_8 - op2_8; SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMP_EbIbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u op2_8 = i->Ib(); Bit32u diff_8 = op1_8 - op2_8; SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::NEG_EbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr); op1_8 = - (Bit8s)(op1_8); write_RMW_virtual_byte(op1_8); SET_FLAGS_OSZAPC_SUB_8(0, 0 - op1_8, op1_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::NEG_EbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); op1_8 = - (Bit8s)(op1_8); BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), op1_8); SET_FLAGS_OSZAPC_SUB_8(0, 0 - op1_8, op1_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::INC_EbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr); op1_8++; write_RMW_virtual_byte(op1_8); SET_FLAGS_OSZAP_ADD_8(op1_8 - 1, 0, op1_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::INC_EbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); op1_8++; BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), op1_8); SET_FLAGS_OSZAP_ADD_8(op1_8 - 1, 0, op1_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::DEC_EbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr); op1_8--; write_RMW_virtual_byte(op1_8); SET_FLAGS_OSZAP_SUB_8(op1_8 + 1, 0, op1_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::DEC_EbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); op1_8--; BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), op1_8); SET_FLAGS_OSZAP_SUB_8(op1_8 + 1, 0, op1_8); BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMPXCHG_EbGbM(bxInstruction_c *i) { bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); Bit32u op1_8 = read_RMW_virtual_byte(i->seg(), eaddr); Bit32u diff_8 = AL - op1_8; SET_FLAGS_OSZAPC_SUB_8(AL, op1_8, diff_8); if (diff_8 == 0) { // if accumulator == dest // dest <-- src Bit32u op2_8 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); write_RMW_virtual_byte(op2_8); } else { // accumulator <-- dest AL = op1_8; } BX_NEXT_INSTR(i); } BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMPXCHG_EbGbR(bxInstruction_c *i) { Bit32u op1_8 = BX_READ_8BIT_REGx(i->dst(), i->extend8bitL()); Bit32u diff_8 = AL - op1_8; SET_FLAGS_OSZAPC_SUB_8(AL, op1_8, diff_8); if (diff_8 == 0) { // if accumulator == dest // dest <-- src Bit32u op2_8 = BX_READ_8BIT_REGx(i->src(), i->extend8bitL()); BX_WRITE_8BIT_REGx(i->dst(), i->extend8bitL(), op2_8); } else { // accumulator <-- dest AL = op1_8; } BX_NEXT_INSTR(i); }