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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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#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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/* 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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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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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(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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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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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(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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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(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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/* 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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} |
369 |
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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; |
380 |
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T0 = ((DATA_TYPE)src1 <= (DATA_TYPE)src2); |
382 |
} |
383 |
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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; |
387 |
} |
388 |
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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; |
394 |
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T0 = ((DATA_STYPE)src1 < (DATA_STYPE)src2); |
396 |
} |
397 |
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void OPPROTO glue(op_setle_T0_sub, SUFFIX)(void) |
399 |
{ |
400 |
int src1, src2;
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src1 = CC_DST + CC_SRC; |
402 |
src2 = CC_SRC; |
403 |
|
404 |
T0 = ((DATA_STYPE)src1 <= (DATA_STYPE)src2); |
405 |
} |
406 |
|
407 |
/* shifts */
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408 |
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void OPPROTO glue(glue(op_shl, SUFFIX), _T0_T1)(void) |
410 |
{ |
411 |
int count;
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count = T1 & 0x1f;
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T0 = T0 << count; |
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FORCE_RET(); |
415 |
} |
416 |
|
417 |
void OPPROTO glue(glue(op_shr, SUFFIX), _T0_T1)(void) |
418 |
{ |
419 |
int count;
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420 |
count = T1 & 0x1f;
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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;
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429 |
count = T1 & 0x1f;
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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
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439 |
#include "ops_template_mem.h" |
440 |
|
441 |
/* bit operations */
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442 |
#if DATA_BITS >= 16 |
443 |
|
444 |
void OPPROTO glue(glue(op_bt, SUFFIX), _T0_T1_cc)(void) |
445 |
{ |
446 |
int count;
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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;
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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;
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462 |
count = T1 & SHIFT_MASK; |
463 |
T1 = T0 >> count; |
464 |
T0 &= ~(1 << count);
|
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} |
466 |
|
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void OPPROTO glue(glue(op_btc, SUFFIX), _T0_T1_cc)(void) |
468 |
{ |
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int count;
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count = T1 & SHIFT_MASK; |
471 |
T1 = T0 >> count; |
472 |
T0 ^= (1 << count);
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} |
474 |
|
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void OPPROTO glue(glue(op_bsf, SUFFIX), _T0_cc)(void) |
476 |
{ |
477 |
int res, count;
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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 {
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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 {
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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
|