debf7a7c7e
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@551 c046a42c-6fe2-441c-8c8c-71466251a162
659 lines
14 KiB
C
659 lines
14 KiB
C
/*
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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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#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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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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#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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#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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#if DATA_BITS == 32
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static int glue(compute_c_mul, SUFFIX)(void)
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{
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int cf;
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cf = (CC_SRC != 0);
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return cf;
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}
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#endif
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/* NOTE: we compute the flags like the P4. On olders CPUs, only OF and
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CF are modified and it is slower to do that. */
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static int glue(compute_all_mul, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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cf = (CC_SRC != 0);
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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 = cf << 11;
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return cf | pf | af | zf | sf | of;
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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(glue(op_jb_sub, SUFFIX), PARAM1, 0, PARAM2);
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else
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JUMP_TB(glue(op_jb_sub, SUFFIX), PARAM1, 1, PARAM3);
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FORCE_RET();
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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(glue(op_jz_sub, SUFFIX), PARAM1, 0, PARAM2);
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else
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JUMP_TB(glue(op_jz_sub, SUFFIX), PARAM1, 1, PARAM3);
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FORCE_RET();
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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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if ((DATA_TYPE)src1 <= (DATA_TYPE)src2)
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JUMP_TB(glue(op_jbe_sub, SUFFIX), PARAM1, 0, PARAM2);
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else
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JUMP_TB(glue(op_jbe_sub, SUFFIX), PARAM1, 1, PARAM3);
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FORCE_RET();
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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(glue(op_js_sub, SUFFIX), PARAM1, 0, PARAM2);
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else
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JUMP_TB(glue(op_js_sub, SUFFIX), PARAM1, 1, PARAM3);
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FORCE_RET();
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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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if ((DATA_STYPE)src1 < (DATA_STYPE)src2)
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JUMP_TB(glue(op_jl_sub, SUFFIX), PARAM1, 0, PARAM2);
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else
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JUMP_TB(glue(op_jl_sub, SUFFIX), PARAM1, 1, PARAM3);
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FORCE_RET();
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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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if ((DATA_STYPE)src1 <= (DATA_STYPE)src2)
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JUMP_TB(glue(op_jle_sub, SUFFIX), PARAM1, 0, PARAM2);
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else
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JUMP_TB(glue(op_jle_sub, SUFFIX), PARAM1, 1, PARAM3);
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FORCE_RET();
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}
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/* oldies */
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#if DATA_BITS >= 16
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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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}
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void OPPROTO glue(op_loopz, 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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}
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void OPPROTO glue(op_loop, SUFFIX)(void)
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{
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unsigned int tmp;
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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)
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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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}
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void OPPROTO glue(op_jecxz, SUFFIX)(void)
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{
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if ((DATA_TYPE)ECX == 0)
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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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}
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#endif
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/* various optimized set cases */
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void OPPROTO glue(op_setb_T0_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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T0 = ((DATA_TYPE)src1 < (DATA_TYPE)src2);
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}
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void OPPROTO glue(op_setz_T0_sub, SUFFIX)(void)
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{
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T0 = ((DATA_TYPE)CC_DST == 0);
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}
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void OPPROTO glue(op_setbe_T0_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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T0 = ((DATA_TYPE)src1 <= (DATA_TYPE)src2);
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}
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void OPPROTO glue(op_sets_T0_sub, SUFFIX)(void)
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{
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T0 = lshift(CC_DST, -(DATA_BITS - 1)) & 1;
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}
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void OPPROTO glue(op_setl_T0_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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T0 = ((DATA_STYPE)src1 < (DATA_STYPE)src2);
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}
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void OPPROTO glue(op_setle_T0_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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T0 = ((DATA_STYPE)src1 <= (DATA_STYPE)src2);
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}
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/* shifts */
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void OPPROTO glue(glue(op_shl, SUFFIX), _T0_T1)(void)
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{
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int count;
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count = T1 & 0x1f;
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T0 = T0 << count;
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_shr, SUFFIX), _T0_T1)(void)
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{
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int count;
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count = T1 & 0x1f;
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T0 &= DATA_MASK;
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T0 = T0 >> count;
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_sar, SUFFIX), _T0_T1)(void)
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{
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int count, src;
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count = T1 & 0x1f;
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src = (DATA_STYPE)T0;
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T0 = src >> count;
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FORCE_RET();
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}
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#undef MEM_WRITE
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#include "ops_template_mem.h"
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#define MEM_WRITE 0
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#include "ops_template_mem.h"
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#if !defined(CONFIG_USER_ONLY)
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#define MEM_WRITE 1
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#include "ops_template_mem.h"
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#define MEM_WRITE 2
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#include "ops_template_mem.h"
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#endif
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/* bit operations */
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#if DATA_BITS >= 16
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void OPPROTO glue(glue(op_bt, SUFFIX), _T0_T1_cc)(void)
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{
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int count;
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count = T1 & SHIFT_MASK;
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CC_SRC = T0 >> count;
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}
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void OPPROTO glue(glue(op_bts, SUFFIX), _T0_T1_cc)(void)
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{
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int count;
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count = T1 & SHIFT_MASK;
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T1 = T0 >> count;
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T0 |= (1 << count);
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}
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void OPPROTO glue(glue(op_btr, SUFFIX), _T0_T1_cc)(void)
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|
{
|
|
int count;
|
|
count = T1 & SHIFT_MASK;
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|
T1 = T0 >> count;
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|
T0 &= ~(1 << count);
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|
}
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|
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void OPPROTO glue(glue(op_btc, SUFFIX), _T0_T1_cc)(void)
|
|
{
|
|
int count;
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|
count = T1 & SHIFT_MASK;
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|
T1 = T0 >> count;
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|
T0 ^= (1 << count);
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|
}
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|
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void OPPROTO glue(glue(op_bsf, SUFFIX), _T0_cc)(void)
|
|
{
|
|
int res, count;
|
|
res = T0 & DATA_MASK;
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|
if (res != 0) {
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|
count = 0;
|
|
while ((res & 1) == 0) {
|
|
count++;
|
|
res >>= 1;
|
|
}
|
|
T0 = count;
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|
CC_DST = 1; /* ZF = 0 */
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|
} else {
|
|
CC_DST = 0; /* ZF = 1 */
|
|
}
|
|
FORCE_RET();
|
|
}
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|
|
|
void OPPROTO glue(glue(op_bsr, SUFFIX), _T0_cc)(void)
|
|
{
|
|
int res, count;
|
|
res = T0 & DATA_MASK;
|
|
if (res != 0) {
|
|
count = DATA_BITS - 1;
|
|
while ((res & SIGN_MASK) == 0) {
|
|
count--;
|
|
res <<= 1;
|
|
}
|
|
T0 = count;
|
|
CC_DST = 1; /* ZF = 0 */
|
|
} else {
|
|
CC_DST = 0; /* ZF = 1 */
|
|
}
|
|
FORCE_RET();
|
|
}
|
|
|
|
#endif
|
|
|
|
#if DATA_BITS == 32
|
|
void OPPROTO op_update_bt_cc(void)
|
|
{
|
|
CC_SRC = T1;
|
|
}
|
|
#endif
|
|
|
|
/* string operations */
|
|
|
|
void OPPROTO glue(op_movl_T0_Dshift, SUFFIX)(void)
|
|
{
|
|
T0 = DF << SHIFT;
|
|
}
|
|
|
|
void OPPROTO glue(op_string_jz_sub, SUFFIX)(void)
|
|
{
|
|
if ((DATA_TYPE)CC_DST == 0)
|
|
JUMP_TB2(glue(op_string_jz_sub, SUFFIX), PARAM1, 3);
|
|
FORCE_RET();
|
|
}
|
|
|
|
void OPPROTO glue(op_string_jnz_sub, SUFFIX)(void)
|
|
{
|
|
if ((DATA_TYPE)CC_DST != 0)
|
|
JUMP_TB2(glue(op_string_jnz_sub, SUFFIX), PARAM1, 3);
|
|
FORCE_RET();
|
|
}
|
|
|
|
void OPPROTO glue(glue(op_string_jz_sub, SUFFIX), _im)(void)
|
|
{
|
|
if ((DATA_TYPE)CC_DST == 0) {
|
|
EIP = PARAM1;
|
|
if (env->eflags & TF_MASK) {
|
|
raise_exception(EXCP01_SSTP);
|
|
}
|
|
T0 = 0;
|
|
EXIT_TB();
|
|
}
|
|
FORCE_RET();
|
|
}
|
|
|
|
void OPPROTO glue(glue(op_string_jnz_sub, SUFFIX), _im)(void)
|
|
{
|
|
if ((DATA_TYPE)CC_DST != 0) {
|
|
EIP = PARAM1;
|
|
if (env->eflags & TF_MASK) {
|
|
raise_exception(EXCP01_SSTP);
|
|
}
|
|
T0 = 0;
|
|
EXIT_TB();
|
|
}
|
|
FORCE_RET();
|
|
}
|
|
|
|
#if DATA_BITS >= 16
|
|
void OPPROTO glue(op_jz_ecx, SUFFIX)(void)
|
|
{
|
|
if ((DATA_TYPE)ECX == 0)
|
|
JUMP_TB(glue(op_jz_ecx, SUFFIX), PARAM1, 1, PARAM2);
|
|
FORCE_RET();
|
|
}
|
|
|
|
void OPPROTO glue(glue(op_jz_ecx, SUFFIX), _im)(void)
|
|
{
|
|
if ((DATA_TYPE)ECX == 0) {
|
|
EIP = PARAM1;
|
|
if (env->eflags & TF_MASK) {
|
|
raise_exception(EXCP01_SSTP);
|
|
}
|
|
T0 = 0;
|
|
EXIT_TB();
|
|
}
|
|
FORCE_RET();
|
|
}
|
|
#endif
|
|
|
|
/* port I/O */
|
|
|
|
void OPPROTO glue(glue(op_out, SUFFIX), _T0_T1)(void)
|
|
{
|
|
glue(cpu_out, SUFFIX)(env, T0, T1 & DATA_MASK);
|
|
}
|
|
|
|
void OPPROTO glue(glue(op_in, SUFFIX), _T0_T1)(void)
|
|
{
|
|
T1 = glue(cpu_in, SUFFIX)(env, T0);
|
|
}
|
|
|
|
void OPPROTO glue(glue(op_in, SUFFIX), _DX_T0)(void)
|
|
{
|
|
T0 = glue(cpu_in, SUFFIX)(env, EDX & 0xffff);
|
|
}
|
|
|
|
void OPPROTO glue(glue(op_out, SUFFIX), _DX_T0)(void)
|
|
{
|
|
glue(cpu_out, SUFFIX)(env, EDX & 0xffff, T0);
|
|
}
|
|
|
|
void OPPROTO glue(glue(op_check_io, SUFFIX), _T0)(void)
|
|
{
|
|
glue(glue(check_io, SUFFIX), _T0)();
|
|
}
|
|
|
|
void OPPROTO glue(glue(op_check_io, SUFFIX), _DX)(void)
|
|
{
|
|
glue(glue(check_io, SUFFIX), _DX)();
|
|
}
|
|
|
|
#undef DATA_BITS
|
|
#undef SHIFT_MASK
|
|
#undef SIGN_MASK
|
|
#undef DATA_TYPE
|
|
#undef DATA_STYPE
|
|
#undef DATA_MASK
|
|
#undef SUFFIX
|