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/*
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* i386 micro operations (included several times to generate
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* different operand sizes)
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define DATA_BITS (1 << (3 + SHIFT)) |
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#define SHIFT_MASK (DATA_BITS - 1) |
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#define SIGN_MASK (1 << (DATA_BITS - 1)) |
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|
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#if DATA_BITS == 8 |
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#define SUFFIX b
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#define DATA_TYPE uint8_t
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#define DATA_STYPE int8_t
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#define DATA_MASK 0xff |
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#elif DATA_BITS == 16 |
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#define SUFFIX w
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#define DATA_TYPE uint16_t
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#define DATA_STYPE int16_t
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#define DATA_MASK 0xffff |
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#elif DATA_BITS == 32 |
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#define SUFFIX l
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#define DATA_TYPE uint32_t
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#define DATA_STYPE int32_t
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#define DATA_MASK 0xffffffff |
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#else
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#error unhandled operand size
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#endif
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/* dynamic flags computation */
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static int glue(compute_all_add, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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int src1, src2;
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src1 = CC_SRC; |
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src2 = CC_DST - CC_SRC; |
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cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; |
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_add, SUFFIX)(void) |
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{
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int src1, cf;
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src1 = CC_SRC; |
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cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; |
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return cf;
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} |
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|
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static int glue(compute_all_adc, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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int src1, src2;
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src1 = CC_SRC; |
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src2 = CC_DST - CC_SRC - 1;
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cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; |
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_adc, SUFFIX)(void) |
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{
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int src1, cf;
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src1 = CC_SRC; |
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cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; |
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return cf;
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} |
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static int glue(compute_all_sub, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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int src1, src2;
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_sub, SUFFIX)(void) |
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{
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int src1, src2, cf;
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; |
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return cf;
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} |
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static int glue(compute_all_sbb, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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int src1, src2;
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src1 = CC_DST + CC_SRC + 1;
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src2 = CC_SRC; |
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cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_sbb, SUFFIX)(void) |
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{
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int src1, src2, cf;
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src1 = CC_DST + CC_SRC + 1;
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src2 = CC_SRC; |
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cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; |
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return cf;
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} |
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static int glue(compute_all_logic, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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cf = 0;
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = 0;
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_logic, SUFFIX)(void) |
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{
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return 0; |
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} |
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static int glue(compute_all_inc, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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int src1, src2;
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src1 = CC_DST - 1;
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src2 = 1;
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cf = CC_SRC; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = ((CC_DST & DATA_MASK) == SIGN_MASK) << 11;
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return cf | pf | af | zf | sf | of;
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} |
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|
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#if DATA_BITS == 32 |
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static int glue(compute_c_inc, SUFFIX)(void) |
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{
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return CC_SRC;
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} |
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#endif
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static int glue(compute_all_dec, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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int src1, src2;
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src1 = CC_DST + 1;
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src2 = 1;
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cf = CC_SRC; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = ((CC_DST & DATA_MASK) == ((uint32_t)SIGN_MASK - 1)) << 11; |
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_all_shl, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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cf = (CC_SRC >> (DATA_BITS - 1)) & CC_C;
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0; /* undefined */ |
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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/* of is defined if shift count == 1 */
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of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_shl, SUFFIX)(void) |
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{
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return (CC_SRC >> (DATA_BITS - 1)) & CC_C; |
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} |
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|
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#if DATA_BITS == 32 |
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static int glue(compute_c_sar, SUFFIX)(void) |
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{
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return CC_SRC & 1; |
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} |
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#endif
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static int glue(compute_all_sar, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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cf = CC_SRC & 1;
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0; /* undefined */ |
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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/* of is defined if shift count == 1 */
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of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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} |
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|
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/* various optimized jumps cases */
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void OPPROTO glue(op_jb_sub, SUFFIX)(void) |
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{
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int src1, src2;
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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if ((DATA_TYPE)src1 < (DATA_TYPE)src2)
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JUMP_TB(PARAM1, 0, PARAM2);
|
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else
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JUMP_TB(PARAM1, 1, PARAM3);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_jz_sub, SUFFIX)(void) |
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{
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if ((DATA_TYPE)CC_DST == 0) |
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JUMP_TB(PARAM1, 0, PARAM2);
|
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else
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JUMP_TB(PARAM1, 1, PARAM3);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_jbe_sub, SUFFIX)(void) |
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{
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int src1, src2;
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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|
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if ((DATA_TYPE)src1 <= (DATA_TYPE)src2)
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JUMP_TB(PARAM1, 0, PARAM2);
|
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else
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JUMP_TB(PARAM1, 1, PARAM3);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_js_sub, SUFFIX)(void) |
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{
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if (CC_DST & SIGN_MASK)
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JUMP_TB(PARAM1, 0, PARAM2);
|
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else
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JUMP_TB(PARAM1, 1, PARAM3);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_jl_sub, SUFFIX)(void) |
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{
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int src1, src2;
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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|
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if ((DATA_STYPE)src1 < (DATA_STYPE)src2)
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JUMP_TB(PARAM1, 0, PARAM2);
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else
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JUMP_TB(PARAM1, 1, PARAM3);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_jle_sub, SUFFIX)(void) |
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{
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int src1, src2;
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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|
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if ((DATA_STYPE)src1 <= (DATA_STYPE)src2)
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JUMP_TB(PARAM1, 0, PARAM2);
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else
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JUMP_TB(PARAM1, 1, PARAM3);
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FORCE_RET(); |
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} |
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|
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/* oldies */
|
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|
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#if DATA_BITS >= 16 |
| 307 |
|
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void OPPROTO glue(op_loopnz, SUFFIX)(void) |
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{
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unsigned int tmp; |
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int eflags;
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eflags = cc_table[CC_OP].compute_all(); |
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tmp = (ECX - 1) & DATA_MASK;
|
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ECX = (ECX & ~DATA_MASK) | tmp; |
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if (tmp != 0 && !(eflags & CC_Z)) |
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EIP = PARAM1; |
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else
|
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EIP = PARAM2; |
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FORCE_RET(); |
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} |
| 321 |
|
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void OPPROTO glue(op_loopz, SUFFIX)(void) |
| 323 |
{
|
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unsigned int tmp; |
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int eflags;
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eflags = cc_table[CC_OP].compute_all(); |
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tmp = (ECX - 1) & DATA_MASK;
|
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ECX = (ECX & ~DATA_MASK) | tmp; |
| 329 |
if (tmp != 0 && (eflags & CC_Z)) |
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EIP = PARAM1; |
| 331 |
else
|
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EIP = PARAM2; |
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FORCE_RET(); |
| 334 |
} |
| 335 |
|
| 336 |
void OPPROTO glue(op_loop, SUFFIX)(void) |
| 337 |
{
|
| 338 |
unsigned int tmp; |
| 339 |
tmp = (ECX - 1) & DATA_MASK;
|
| 340 |
ECX = (ECX & ~DATA_MASK) | tmp; |
| 341 |
if (tmp != 0) |
| 342 |
EIP = PARAM1; |
| 343 |
else
|
| 344 |
EIP = PARAM2; |
| 345 |
FORCE_RET(); |
| 346 |
} |
| 347 |
|
| 348 |
void OPPROTO glue(op_jecxz, SUFFIX)(void) |
| 349 |
{
|
| 350 |
if ((DATA_TYPE)ECX == 0) |
| 351 |
EIP = PARAM1; |
| 352 |
else
|
| 353 |
EIP = PARAM2; |
| 354 |
FORCE_RET(); |
| 355 |
} |
| 356 |
|
| 357 |
#endif
|
| 358 |
|
| 359 |
/* various optimized set cases */
|
| 360 |
|
| 361 |
void OPPROTO glue(op_setb_T0_sub, SUFFIX)(void) |
| 362 |
{
|
| 363 |
int src1, src2;
|
| 364 |
src1 = CC_DST + CC_SRC; |
| 365 |
src2 = CC_SRC; |
| 366 |
|
| 367 |
T0 = ((DATA_TYPE)src1 < (DATA_TYPE)src2); |
| 368 |
} |
| 369 |
|
| 370 |
void OPPROTO glue(op_setz_T0_sub, SUFFIX)(void) |
| 371 |
{
|
| 372 |
T0 = ((DATA_TYPE)CC_DST == 0);
|
| 373 |
} |
| 374 |
|
| 375 |
void OPPROTO glue(op_setbe_T0_sub, SUFFIX)(void) |
| 376 |
{
|
| 377 |
int src1, src2;
|
| 378 |
src1 = CC_DST + CC_SRC; |
| 379 |
src2 = CC_SRC; |
| 380 |
|
| 381 |
T0 = ((DATA_TYPE)src1 <= (DATA_TYPE)src2); |
| 382 |
} |
| 383 |
|
| 384 |
void OPPROTO glue(op_sets_T0_sub, SUFFIX)(void) |
| 385 |
{
|
| 386 |
T0 = lshift(CC_DST, -(DATA_BITS - 1)) & 1; |
| 387 |
} |
| 388 |
|
| 389 |
void OPPROTO glue(op_setl_T0_sub, SUFFIX)(void) |
| 390 |
{
|
| 391 |
int src1, src2;
|
| 392 |
src1 = CC_DST + CC_SRC; |
| 393 |
src2 = CC_SRC; |
| 394 |
|
| 395 |
T0 = ((DATA_STYPE)src1 < (DATA_STYPE)src2); |
| 396 |
} |
| 397 |
|
| 398 |
void OPPROTO glue(op_setle_T0_sub, SUFFIX)(void) |
| 399 |
{
|
| 400 |
int src1, src2;
|
| 401 |
src1 = CC_DST + CC_SRC; |
| 402 |
src2 = CC_SRC; |
| 403 |
|
| 404 |
T0 = ((DATA_STYPE)src1 <= (DATA_STYPE)src2); |
| 405 |
} |
| 406 |
|
| 407 |
/* shifts */
|
| 408 |
|
| 409 |
void OPPROTO glue(glue(op_shl, SUFFIX), _T0_T1)(void) |
| 410 |
{
|
| 411 |
int count;
|
| 412 |
count = T1 & 0x1f;
|
| 413 |
T0 = T0 << count; |
| 414 |
FORCE_RET(); |
| 415 |
} |
| 416 |
|
| 417 |
void OPPROTO glue(glue(op_shr, SUFFIX), _T0_T1)(void) |
| 418 |
{
|
| 419 |
int count;
|
| 420 |
count = T1 & 0x1f;
|
| 421 |
T0 &= DATA_MASK; |
| 422 |
T0 = T0 >> count; |
| 423 |
FORCE_RET(); |
| 424 |
} |
| 425 |
|
| 426 |
void OPPROTO glue(glue(op_sar, SUFFIX), _T0_T1)(void) |
| 427 |
{
|
| 428 |
int count, src;
|
| 429 |
count = T1 & 0x1f;
|
| 430 |
src = (DATA_STYPE)T0; |
| 431 |
T0 = src >> count; |
| 432 |
FORCE_RET(); |
| 433 |
} |
| 434 |
|
| 435 |
#undef MEM_WRITE
|
| 436 |
#include "ops_template_mem.h" |
| 437 |
|
| 438 |
#define MEM_WRITE
|
| 439 |
#include "ops_template_mem.h" |
| 440 |
|
| 441 |
/* bit operations */
|
| 442 |
#if DATA_BITS >= 16 |
| 443 |
|
| 444 |
void OPPROTO glue(glue(op_bt, SUFFIX), _T0_T1_cc)(void) |
| 445 |
{
|
| 446 |
int count;
|
| 447 |
count = T1 & SHIFT_MASK; |
| 448 |
CC_SRC = T0 >> count; |
| 449 |
} |
| 450 |
|
| 451 |
void OPPROTO glue(glue(op_bts, SUFFIX), _T0_T1_cc)(void) |
| 452 |
{
|
| 453 |
int count;
|
| 454 |
count = T1 & SHIFT_MASK; |
| 455 |
T1 = T0 >> count; |
| 456 |
T0 |= (1 << count);
|
| 457 |
} |
| 458 |
|
| 459 |
void OPPROTO glue(glue(op_btr, SUFFIX), _T0_T1_cc)(void) |
| 460 |
{
|
| 461 |
int count;
|
| 462 |
count = T1 & SHIFT_MASK; |
| 463 |
T1 = T0 >> count; |
| 464 |
T0 &= ~(1 << count);
|
| 465 |
} |
| 466 |
|
| 467 |
void OPPROTO glue(glue(op_btc, SUFFIX), _T0_T1_cc)(void) |
| 468 |
{
|
| 469 |
int count;
|
| 470 |
count = T1 & SHIFT_MASK; |
| 471 |
T1 = T0 >> count; |
| 472 |
T0 ^= (1 << count);
|
| 473 |
} |
| 474 |
|
| 475 |
void OPPROTO glue(glue(op_bsf, SUFFIX), _T0_cc)(void) |
| 476 |
{
|
| 477 |
int res, count;
|
| 478 |
res = T0 & DATA_MASK; |
| 479 |
if (res != 0) { |
| 480 |
count = 0;
|
| 481 |
while ((res & 1) == 0) { |
| 482 |
count++; |
| 483 |
res >>= 1;
|
| 484 |
} |
| 485 |
T0 = count; |
| 486 |
CC_DST = 1; /* ZF = 1 */ |
| 487 |
} else {
|
| 488 |
CC_DST = 0; /* ZF = 1 */ |
| 489 |
} |
| 490 |
FORCE_RET(); |
| 491 |
} |
| 492 |
|
| 493 |
void OPPROTO glue(glue(op_bsr, SUFFIX), _T0_cc)(void) |
| 494 |
{
|
| 495 |
int res, count;
|
| 496 |
res = T0 & DATA_MASK; |
| 497 |
if (res != 0) { |
| 498 |
count = DATA_BITS - 1;
|
| 499 |
while ((res & SIGN_MASK) == 0) { |
| 500 |
count--; |
| 501 |
res <<= 1;
|
| 502 |
} |
| 503 |
T0 = count; |
| 504 |
CC_DST = 1; /* ZF = 1 */ |
| 505 |
} else {
|
| 506 |
CC_DST = 0; /* ZF = 1 */ |
| 507 |
} |
| 508 |
FORCE_RET(); |
| 509 |
} |
| 510 |
|
| 511 |
#endif
|
| 512 |
|
| 513 |
#if DATA_BITS == 32 |
| 514 |
void OPPROTO op_update_bt_cc(void) |
| 515 |
{
|
| 516 |
CC_SRC = T1; |
| 517 |
} |
| 518 |
#endif
|
| 519 |
|
| 520 |
/* string operations */
|
| 521 |
/* XXX: maybe use lower level instructions to ease 16 bit / segment handling */
|
| 522 |
|
| 523 |
#define STRING_SUFFIX _fast
|
| 524 |
#define SI_ADDR (void *)ESI |
| 525 |
#define DI_ADDR (void *)EDI |
| 526 |
#define INC_SI() ESI += inc
|
| 527 |
#define INC_DI() EDI += inc
|
| 528 |
#define CX ECX
|
| 529 |
#define DEC_CX() ECX--
|
| 530 |
#include "op_string.h" |
| 531 |
|
| 532 |
#define STRING_SUFFIX _a32
|
| 533 |
#define SI_ADDR (uint8_t *)A0 + ESI
|
| 534 |
#define DI_ADDR env->segs[R_ES].base + EDI
|
| 535 |
#define INC_SI() ESI += inc
|
| 536 |
#define INC_DI() EDI += inc
|
| 537 |
#define CX ECX
|
| 538 |
#define DEC_CX() ECX--
|
| 539 |
#include "op_string.h" |
| 540 |
|
| 541 |
#define STRING_SUFFIX _a16
|
| 542 |
#define SI_ADDR (uint8_t *)A0 + (ESI & 0xffff) |
| 543 |
#define DI_ADDR env->segs[R_ES].base + (EDI & 0xffff) |
| 544 |
#define INC_SI() ESI = (ESI & ~0xffff) | ((ESI + inc) & 0xffff) |
| 545 |
#define INC_DI() EDI = (EDI & ~0xffff) | ((EDI + inc) & 0xffff) |
| 546 |
#define CX (ECX & 0xffff) |
| 547 |
#define DEC_CX() ECX = (ECX & ~0xffff) | ((ECX - 1) & 0xffff) |
| 548 |
#include "op_string.h" |
| 549 |
|
| 550 |
/* port I/O */
|
| 551 |
|
| 552 |
void OPPROTO glue(glue(op_out, SUFFIX), _T0_T1)(void) |
| 553 |
{
|
| 554 |
glue(cpu_x86_out, SUFFIX)(env, T0 & 0xffff, T1 & DATA_MASK);
|
| 555 |
} |
| 556 |
|
| 557 |
void OPPROTO glue(glue(op_in, SUFFIX), _T0_T1)(void) |
| 558 |
{
|
| 559 |
T1 = glue(cpu_x86_in, SUFFIX)(env, T0 & 0xffff);
|
| 560 |
} |
| 561 |
|
| 562 |
#undef DATA_BITS
|
| 563 |
#undef SHIFT_MASK
|
| 564 |
#undef SIGN_MASK
|
| 565 |
#undef DATA_TYPE
|
| 566 |
#undef DATA_STYPE
|
| 567 |
#undef DATA_MASK
|
| 568 |
#undef SUFFIX
|