| 1 |
2 |
alfik |
/////////////////////////////////////////////////////////////////////////
|
| 2 |
|
|
// $Id: lazy_flags.h 11405 2012-09-06 19:49:14Z sshwarts $
|
| 3 |
|
|
/////////////////////////////////////////////////////////////////////////
|
| 4 |
|
|
//
|
| 5 |
|
|
// Copyright (C) 2001-2011 The Bochs Project
|
| 6 |
|
|
//
|
| 7 |
|
|
// This library is free software; you can redistribute it and/or
|
| 8 |
|
|
// modify it under the terms of the GNU Lesser General Public
|
| 9 |
|
|
// License as published by the Free Software Foundation; either
|
| 10 |
|
|
// version 2 of the License, or (at your option) any later version.
|
| 11 |
|
|
//
|
| 12 |
|
|
// This library is distributed in the hope that it will be useful,
|
| 13 |
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 14 |
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 15 |
|
|
// Lesser General Public License for more details.
|
| 16 |
|
|
//
|
| 17 |
|
|
// You should have received a copy of the GNU Lesser General Public
|
| 18 |
|
|
// License along with this library; if not, write to the Free Software
|
| 19 |
|
|
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
| 20 |
|
|
//
|
| 21 |
|
|
/////////////////////////////////////////////////////////////////////////
|
| 22 |
|
|
|
| 23 |
|
|
#ifndef BX_LAZY_FLAGS_DEF
|
| 24 |
|
|
#define BX_LAZY_FLAGS_DEF
|
| 25 |
|
|
|
| 26 |
|
|
#if BX_SUPPORT_X86_64
|
| 27 |
|
|
#define BX_LF_SIGN_BIT 63
|
| 28 |
|
|
#else
|
| 29 |
|
|
#define BX_LF_SIGN_BIT 31
|
| 30 |
|
|
#endif
|
| 31 |
|
|
|
| 32 |
|
|
typedef struct {
|
| 33 |
|
|
bx_address result;
|
| 34 |
|
|
bx_address auxbits;
|
| 35 |
|
|
} bx_lf_flags_entry;
|
| 36 |
|
|
|
| 37 |
|
|
// These are the lazy flags bits in oszapc.auxbits which hold lazy state
|
| 38 |
|
|
// of zero flag, adjust flag, carry flag, and overflow flag.
|
| 39 |
|
|
|
| 40 |
|
|
#define LF_BIT_SD (0) /* lazy Sign Flag Delta */
|
| 41 |
|
|
#define LF_BIT_AF (3) /* lazy Adjust flag */
|
| 42 |
|
|
#define LF_BIT_PDB (8) /* lazy Parity Delta Byte (8 bits) */
|
| 43 |
|
|
#define LF_BIT_CF (31) /* lazy Carry Flag */
|
| 44 |
|
|
#define LF_BIT_PO (30) /* lazy Partial Overflow = CF ^ OF */
|
| 45 |
|
|
|
| 46 |
|
|
#define LF_MASK_SD (0x01 << LF_BIT_SD)
|
| 47 |
|
|
#define LF_MASK_AF (0x01 << LF_BIT_AF)
|
| 48 |
|
|
#define LF_MASK_PDB (0xFF << LF_BIT_PDB)
|
| 49 |
|
|
#define LF_MASK_CF (0x01 << LF_BIT_CF)
|
| 50 |
|
|
#define LF_MASK_PO (0x01 << LF_BIT_PO)
|
| 51 |
|
|
|
| 52 |
|
|
#define ADD_COUT_VEC(op1, op2, result) \
|
| 53 |
|
|
(((op1) & (op2)) | (((op1) | (op2)) & (~(result))))
|
| 54 |
|
|
|
| 55 |
|
|
#define SUB_COUT_VEC(op1, op2, result) \
|
| 56 |
|
|
(((~(op1)) & (op2)) | (((~(op1)) ^ (op2)) & (result)))
|
| 57 |
|
|
|
| 58 |
|
|
#define GET_ADD_OVERFLOW(op1, op2, result, mask) \
|
| 59 |
|
|
((((op1) ^ (result)) & ((op2) ^ (result))) & (mask))
|
| 60 |
|
|
|
| 61 |
|
|
// *******************
|
| 62 |
|
|
// OSZAPC
|
| 63 |
|
|
// *******************
|
| 64 |
|
|
|
| 65 |
|
|
/* size, carries, result */
|
| 66 |
|
|
#define SET_FLAGS_OSZAPC_SIZE(size, lf_carries, lf_result) { \
|
| 67 |
|
|
bx_address temp = ((lf_carries) & (LF_MASK_AF)) | \
|
| 68 |
|
|
(((lf_carries) >> (size - 2)) << LF_BIT_PO); \
|
| 69 |
|
|
BX_CPU_THIS_PTR oszapc.result = (bx_address)(Bit##size##s)(lf_result); \
|
| 70 |
|
|
if ((size) == 32) temp = ((lf_carries) & ~(LF_MASK_PDB | LF_MASK_SD)); \
|
| 71 |
|
|
if ((size) == 16) temp = ((lf_carries) & (LF_MASK_AF)) | ((lf_carries) << 16); \
|
| 72 |
|
|
if ((size) == 8) temp = ((lf_carries) & (LF_MASK_AF)) | ((lf_carries) << 24); \
|
| 73 |
|
|
BX_CPU_THIS_PTR oszapc.auxbits = (bx_address)(Bit32u)temp; \
|
| 74 |
|
|
}
|
| 75 |
|
|
|
| 76 |
|
|
/* carries, result */
|
| 77 |
|
|
#define SET_FLAGS_OSZAPC_8(carries, result) \
|
| 78 |
|
|
SET_FLAGS_OSZAPC_SIZE(8, carries, result)
|
| 79 |
|
|
#define SET_FLAGS_OSZAPC_16(carries, result) \
|
| 80 |
|
|
SET_FLAGS_OSZAPC_SIZE(16, carries, result)
|
| 81 |
|
|
#define SET_FLAGS_OSZAPC_32(carries, result) \
|
| 82 |
|
|
SET_FLAGS_OSZAPC_SIZE(32, carries, result)
|
| 83 |
|
|
#if BX_SUPPORT_X86_64
|
| 84 |
|
|
#define SET_FLAGS_OSZAPC_64(carries, result) \
|
| 85 |
|
|
SET_FLAGS_OSZAPC_SIZE(64, carries, result)
|
| 86 |
|
|
#endif
|
| 87 |
|
|
|
| 88 |
|
|
/* result */
|
| 89 |
|
|
#define SET_FLAGS_OSZAPC_LOGIC_8(result_8) \
|
| 90 |
|
|
SET_FLAGS_OSZAPC_8(0, (result_8))
|
| 91 |
|
|
#define SET_FLAGS_OSZAPC_LOGIC_16(result_16) \
|
| 92 |
|
|
SET_FLAGS_OSZAPC_16(0, (result_16))
|
| 93 |
|
|
#define SET_FLAGS_OSZAPC_LOGIC_32(result_32) \
|
| 94 |
|
|
SET_FLAGS_OSZAPC_32(0, (result_32))
|
| 95 |
|
|
#if BX_SUPPORT_X86_64
|
| 96 |
|
|
#define SET_FLAGS_OSZAPC_LOGIC_64(result_64) \
|
| 97 |
|
|
SET_FLAGS_OSZAPC_64(BX_CONST64(0), (result_64))
|
| 98 |
|
|
#endif
|
| 99 |
|
|
|
| 100 |
|
|
/* op1, op2, result */
|
| 101 |
|
|
#define SET_FLAGS_OSZAPC_ADD_8(op1_8, op2_8, sum_8) \
|
| 102 |
|
|
SET_FLAGS_OSZAPC_8(ADD_COUT_VEC((op1_8), (op2_8), (sum_8)), (sum_8))
|
| 103 |
|
|
#define SET_FLAGS_OSZAPC_ADD_16(op1_16, op2_16, sum_16) \
|
| 104 |
|
|
SET_FLAGS_OSZAPC_16(ADD_COUT_VEC((op1_16), (op2_16), (sum_16)), (sum_16))
|
| 105 |
|
|
#define SET_FLAGS_OSZAPC_ADD_32(op1_32, op2_32, sum_32) \
|
| 106 |
|
|
SET_FLAGS_OSZAPC_32(ADD_COUT_VEC((op1_32), (op2_32), (sum_32)), (sum_32))
|
| 107 |
|
|
#if BX_SUPPORT_X86_64
|
| 108 |
|
|
#define SET_FLAGS_OSZAPC_ADD_64(op1_64, op2_64, sum_64) \
|
| 109 |
|
|
SET_FLAGS_OSZAPC_64(ADD_COUT_VEC((op1_64), (op2_64), (sum_64)), (sum_64))
|
| 110 |
|
|
#endif
|
| 111 |
|
|
|
| 112 |
|
|
/* op1, op2, result */
|
| 113 |
|
|
#define SET_FLAGS_OSZAPC_SUB_8(op1_8, op2_8, diff_8) \
|
| 114 |
|
|
SET_FLAGS_OSZAPC_8(SUB_COUT_VEC((op1_8), (op2_8), (diff_8)), (diff_8))
|
| 115 |
|
|
#define SET_FLAGS_OSZAPC_SUB_16(op1_16, op2_16, diff_16) \
|
| 116 |
|
|
SET_FLAGS_OSZAPC_16(SUB_COUT_VEC((op1_16), (op2_16), (diff_16)), (diff_16))
|
| 117 |
|
|
#define SET_FLAGS_OSZAPC_SUB_32(op1_32, op2_32, diff_32) \
|
| 118 |
|
|
SET_FLAGS_OSZAPC_32(SUB_COUT_VEC((op1_32), (op2_32), (diff_32)), (diff_32))
|
| 119 |
|
|
#if BX_SUPPORT_X86_64
|
| 120 |
|
|
#define SET_FLAGS_OSZAPC_SUB_64(op1_64, op2_64, diff_64) \
|
| 121 |
|
|
SET_FLAGS_OSZAPC_64(SUB_COUT_VEC((op1_64), (op2_64), (diff_64)), (diff_64))
|
| 122 |
|
|
#endif
|
| 123 |
|
|
|
| 124 |
|
|
// *******************
|
| 125 |
|
|
// OSZAP
|
| 126 |
|
|
// *******************
|
| 127 |
|
|
|
| 128 |
|
|
/* size, carries, result */
|
| 129 |
|
|
#define SET_FLAGS_OSZAP_SIZE(size, lf_carries, lf_result) { \
|
| 130 |
|
|
bx_address temp = ((lf_carries) & (LF_MASK_AF)) | \
|
| 131 |
|
|
(((lf_carries) >> (size - 2)) << LF_BIT_PO); \
|
| 132 |
|
|
if ((size) == 32) temp = ((lf_carries) & ~(LF_MASK_PDB | LF_MASK_SD)); \
|
| 133 |
|
|
if ((size) == 16) temp = ((lf_carries) & (LF_MASK_AF)) | ((lf_carries) << 16); \
|
| 134 |
|
|
if ((size) == 8) temp = ((lf_carries) & (LF_MASK_AF)) | ((lf_carries) << 24); \
|
| 135 |
|
|
BX_CPU_THIS_PTR oszapc.result = (bx_address)(Bit##size##s)(lf_result); \
|
| 136 |
|
|
bx_address delta_c = (BX_CPU_THIS_PTR oszapc.auxbits ^ temp) & LF_MASK_CF; \
|
| 137 |
|
|
delta_c ^= (delta_c >> 1); \
|
| 138 |
|
|
BX_CPU_THIS_PTR oszapc.auxbits = (bx_address)(Bit32u)(temp ^ delta_c); \
|
| 139 |
|
|
}
|
| 140 |
|
|
|
| 141 |
|
|
/* carries, result */
|
| 142 |
|
|
#define SET_FLAGS_OSZAP_8(carries, result) \
|
| 143 |
|
|
SET_FLAGS_OSZAP_SIZE(8, carries, result)
|
| 144 |
|
|
#define SET_FLAGS_OSZAP_16(carries, result) \
|
| 145 |
|
|
SET_FLAGS_OSZAP_SIZE(16, carries, result)
|
| 146 |
|
|
#define SET_FLAGS_OSZAP_32(carries, result) \
|
| 147 |
|
|
SET_FLAGS_OSZAP_SIZE(32, carries, result)
|
| 148 |
|
|
#if BX_SUPPORT_X86_64
|
| 149 |
|
|
#define SET_FLAGS_OSZAP_64(carries, result) \
|
| 150 |
|
|
SET_FLAGS_OSZAP_SIZE(64, carries, result)
|
| 151 |
|
|
#endif
|
| 152 |
|
|
|
| 153 |
|
|
/* op1, op2, result */
|
| 154 |
|
|
#define SET_FLAGS_OSZAP_ADD_8(op1_8, op2_8, sum_8) \
|
| 155 |
|
|
SET_FLAGS_OSZAP_8(ADD_COUT_VEC((op1_8), (op2_8), (sum_8)), (sum_8))
|
| 156 |
|
|
#define SET_FLAGS_OSZAP_ADD_16(op1_16, op2_16, sum_16) \
|
| 157 |
|
|
SET_FLAGS_OSZAP_16(ADD_COUT_VEC((op1_16), (op2_16), (sum_16)), (sum_16))
|
| 158 |
|
|
#define SET_FLAGS_OSZAP_ADD_32(op1_32, op2_32, sum_32) \
|
| 159 |
|
|
SET_FLAGS_OSZAP_32(ADD_COUT_VEC((op1_32), (op2_32), (sum_32)), (sum_32))
|
| 160 |
|
|
#if BX_SUPPORT_X86_64
|
| 161 |
|
|
#define SET_FLAGS_OSZAP_ADD_64(op1_64, op2_64, sum_64) \
|
| 162 |
|
|
SET_FLAGS_OSZAP_64(ADD_COUT_VEC((op1_64), (op2_64), (sum_64)), (sum_64))
|
| 163 |
|
|
#endif
|
| 164 |
|
|
|
| 165 |
|
|
/* op1, op2, result */
|
| 166 |
|
|
#define SET_FLAGS_OSZAP_SUB_8(op1_8, op2_8, diff_8) \
|
| 167 |
|
|
SET_FLAGS_OSZAP_8(SUB_COUT_VEC((op1_8), (op2_8), (diff_8)), (diff_8))
|
| 168 |
|
|
#define SET_FLAGS_OSZAP_SUB_16(op1_16, op2_16, diff_16) \
|
| 169 |
|
|
SET_FLAGS_OSZAP_16(SUB_COUT_VEC((op1_16), (op2_16), (diff_16)), (diff_16))
|
| 170 |
|
|
#define SET_FLAGS_OSZAP_SUB_32(op1_32, op2_32, diff_32) \
|
| 171 |
|
|
SET_FLAGS_OSZAP_32(SUB_COUT_VEC((op1_32), (op2_32), (diff_32)), (diff_32))
|
| 172 |
|
|
#if BX_SUPPORT_X86_64
|
| 173 |
|
|
#define SET_FLAGS_OSZAP_SUB_64(op1_64, op2_64, diff_64) \
|
| 174 |
|
|
SET_FLAGS_OSZAP_64(SUB_COUT_VEC((op1_64), (op2_64), (diff_64)), (diff_64))
|
| 175 |
|
|
#endif
|
| 176 |
|
|
|
| 177 |
|
|
// *******************
|
| 178 |
|
|
// OSZAxC
|
| 179 |
|
|
// *******************
|
| 180 |
|
|
|
| 181 |
|
|
/* size, carries, result */
|
| 182 |
|
|
#define SET_FLAGS_OSZAxC_LOGIC_SIZE(size, lf_result) { \
|
| 183 |
|
|
bx_bool saved_PF = getB_PF(); \
|
| 184 |
|
|
SET_FLAGS_OSZAPC_SIZE(size, (Bit##size##u)(0), lf_result); \
|
| 185 |
|
|
set_PF(saved_PF); \
|
| 186 |
|
|
}
|
| 187 |
|
|
|
| 188 |
|
|
/* result */
|
| 189 |
|
|
#define SET_FLAGS_OSZAxC_LOGIC_32(result_32) \
|
| 190 |
|
|
SET_FLAGS_OSZAxC_LOGIC_SIZE(32, (result_32))
|
| 191 |
|
|
#if BX_SUPPORT_X86_64
|
| 192 |
|
|
#define SET_FLAGS_OSZAxC_LOGIC_64(result_64) \
|
| 193 |
|
|
SET_FLAGS_OSZAxC_LOGIC_SIZE(64, (result_64))
|
| 194 |
|
|
#endif
|
| 195 |
|
|
|
| 196 |
|
|
#endif // BX_LAZY_FLAGS_DEF
|
