[41] | 1 | ; Project name : Emulation library |
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[293] | 2 | ; Description : Macros for emulating later x86 instructions with older |
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[41] | 3 | ; processors. |
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[293] | 4 | ; Macros are used so optimized builds can be done |
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[41] | 5 | ; easily for different processors. |
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| 6 | ; |
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| 7 | ; This file must be first to be included to |
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| 8 | ; any source file. |
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| 9 | %ifndef EMULATE_INC |
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| 10 | %define EMULATE_INC |
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| 11 | |
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[293] | 12 | ; Defines for processor support (should be set in makefile). |
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| 13 | ; Unsupported instructions will be emulated using macros. |
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[41] | 14 | ; If AT class PC is used (instead of XT), define USE_AT |
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[293] | 15 | |
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[41] | 16 | ;%define USE_186 ; Define to use 18x/V20/V30 instructions |
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| 17 | ;%define USE_286 ; Define to use 286 instructions |
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| 18 | ;%define USE_386 ; Define to use 386 instructions |
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| 19 | ;%define USE_AT ; Define for AT class machine |
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| 20 | |
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[596] | 21 | %ifdef USE_NEC_V ; This will run on NEC V20/V30 processors only |
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| 22 | %define USE_186 ; Define to use 18x/V20/V30 instructions |
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| 23 | %ifdef USE_UNDOC_INTEL OR USE_286 OR USE_386 |
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| 24 | %fatal "Conflicting processor define used together with USE_NEC_V!" |
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| 25 | %endif |
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| 26 | %endif |
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| 27 | |
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[293] | 28 | %ifdef USE_386 |
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| 29 | %define USE_286 ; Define to use 286 instructions |
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| 30 | %endif |
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| 31 | %ifdef USE_286 |
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| 32 | %define USE_186 ; Define to use 18x/V20/V30 instructions |
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[510] | 33 | %define USE_UNDOC_INTEL ; Not supported by NEC V20/V30 |
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[293] | 34 | %endif |
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| 35 | |
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| 36 | %ifdef USE_386 |
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| 37 | CPU 386 ; Allow instructions up to 386 |
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[41] | 38 | %elifdef USE_286 |
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[293] | 39 | CPU 286 ; Allow instructions up to 286 |
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| 40 | %elifdef USE_186 |
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| 41 | CPU 186 ; Allow instructions up to 188/186/V20/V30 |
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| 42 | %else |
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| 43 | CPU 8086 ; Allow 8088/8086 instructions only |
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[41] | 44 | %endif |
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[293] | 45 | |
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[41] | 46 | BITS 16 ; Set 16 bit code generation |
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| 47 | |
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| 48 | ; Alignments for jump targets. |
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| 49 | ; Following values are optimal for different processor types: |
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| 50 | ; 286 and 386SX WORD (16-bit, 2 bytes) |
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| 51 | ; 386DX and 486 DWORD (32-bit, 4 bytes) |
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| 52 | ; Pentium and later QWORD (64-bit, 8 bytes) |
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| 53 | %ifdef USE_AT |
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| 54 | %ifdef USE_386 |
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| 55 | JUMP_ALIGN EQU 4 |
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| 56 | WORD_ALIGN EQU 2 |
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| 57 | %else ; USE_286 |
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| 58 | JUMP_ALIGN EQU 2 |
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| 59 | WORD_ALIGN EQU 2 |
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| 60 | %endif |
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| 61 | %else ; XT |
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[623] | 62 | %ifndef USE_086 ; 8088/V20 CPUs |
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| 63 | JUMP_ALIGN EQU 1 ; 2 is optimal for 8086 and NEC V30 CPUs but it's not worth the ROM space for most XT machines with 8088 or NEC V20 CPUs. |
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| 64 | WORD_ALIGN EQU 2 ; The same applies here but the cost of ROM space is negligible. |
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| 65 | %else ; 8086/V30 CPUs |
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| 66 | JUMP_ALIGN EQU 2 |
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| 67 | WORD_ALIGN EQU 2 |
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| 68 | %endif |
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[41] | 69 | %endif |
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| 70 | |
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| 71 | ;========================================================================== |
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| 72 | |
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| 73 | ;-------------------------------------------------------------------- |
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[592] | 74 | ; Find String In String |
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| 75 | ; |
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| 76 | ; FSIS |
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| 77 | ; Parameters: |
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| 78 | ; %1: String to search for (case-insensitive) |
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| 79 | ; %2: String to search in |
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| 80 | ; Returns: |
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| 81 | ; strpos: Position of %1 in %2 if found, 0 if not found |
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| 82 | ;-------------------------------------------------------------------- |
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| 83 | %macro FSIS 2.nolist |
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| 84 | %defstr s1 %1 |
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| 85 | %defstr s2 %2 |
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| 86 | %strlen sl1 s1 |
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| 87 | %strlen sl2 s2 |
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| 88 | %assign strpos 0 |
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| 89 | %if sl1 <= sl2 |
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| 90 | %assign strpos sl2 - sl1 + 1 |
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| 91 | %rep strpos |
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| 92 | %substr %%ss s2 strpos, sl1 |
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| 93 | %ifidni %%ss, s1 |
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| 94 | %exitrep |
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| 95 | %else |
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| 96 | %assign strpos strpos - 1 |
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| 97 | %endif |
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| 98 | %endrep |
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| 99 | %endif |
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| 100 | %endmacro |
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| 101 | |
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| 102 | |
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[596] | 103 | %ifdef USE_NEC_V |
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| 104 | %include "NEC_V.inc" |
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| 105 | %endif |
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| 106 | |
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| 107 | |
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[592] | 108 | ;-------------------------------------------------------------------- |
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[491] | 109 | ; The undocumented instruction SALC (Set AL According to CF). |
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| 110 | ; Available on all Intel processors and truly compatible clones. |
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| 111 | ; Does not work on the NEC V20/V30 or Sony CXQ70108 processors. |
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| 112 | ; |
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| 113 | ; eSALC |
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| 114 | ; Parameters: |
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| 115 | ; Nothing |
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| 116 | ; Returns: |
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| 117 | ; AL: FFh if CF=1 |
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| 118 | ; 00h if CF=0 |
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| 119 | ; Corrupts registers: |
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| 120 | ; Nothing |
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| 121 | ;-------------------------------------------------------------------- |
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| 122 | %macro eSALC 0 |
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[568] | 123 | ; db 0D6h |
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| 124 | salc |
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[491] | 125 | %endmacro |
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| 126 | |
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| 127 | |
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| 128 | ;-------------------------------------------------------------------- |
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| 129 | ; The AAD instruction (ASCII Adjust before Division). |
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| 130 | ; Available on all Intel processors and truly compatible clones. |
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| 131 | ; Does not work on the NEC V20/V30 or Sony CXQ70108 processors |
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| 132 | ; unless %1 is 10 (0Ah). |
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| 133 | ; |
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| 134 | ; eAAD |
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| 135 | ; Parameters: |
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| 136 | ; %1: Any 8 bit number (0...255) |
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| 137 | ; Returns: |
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| 138 | ; AL: AH * %1 + AL |
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| 139 | ; AH: 0 |
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| 140 | ; Flags: Set according to result |
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| 141 | ; Corrupts registers: |
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| 142 | ; Nothing |
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| 143 | ;-------------------------------------------------------------------- |
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| 144 | %macro eAAD 1 |
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| 145 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS |
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| 146 | %if %1 > 255 |
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| 147 | %error Invalid parameter passed to eAAD (%1 > 255) |
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| 148 | %else |
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| 149 | db 0D5h, %1 |
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| 150 | %endif |
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| 151 | %endif |
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| 152 | %endmacro |
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| 153 | |
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| 154 | |
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| 155 | ;-------------------------------------------------------------------- |
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| 156 | ; The AAM instruction (ASCII Adjust after Multiplication). |
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| 157 | ; |
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| 158 | ; eAAM |
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| 159 | ; Parameters: |
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| 160 | ; %1: Any 8 bit number except 0 (1...255) |
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| 161 | ; Returns: |
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| 162 | ; AL: AL MOD %1 |
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| 163 | ; AH: AL / %1 |
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| 164 | ; Flags: Set according to result |
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| 165 | ; Corrupts registers: |
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| 166 | ; Nothing |
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| 167 | ;-------------------------------------------------------------------- |
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| 168 | %macro eAAM 1 |
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| 169 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS |
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| 170 | %if %1 > 255 |
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| 171 | %error Invalid parameter passed to eAAM (%1 > 255) |
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| 172 | %elif %1 = 0 |
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| 173 | %error Invalid parameter passed to eAAM (%1 = 0). This would cause a divide-by-zero exception! |
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| 174 | %else |
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| 175 | db 0D4h, %1 |
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| 176 | %endif |
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| 177 | %endif |
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| 178 | %endmacro |
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| 179 | |
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| 180 | |
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| 181 | ;-------------------------------------------------------------------- |
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[41] | 182 | ; Emulates BSF (Bit Scan Forward) instruction when necessary. |
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| 183 | ; BSF is used to find index of least significant bit. |
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| 184 | ; |
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| 185 | ; eBSF |
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| 186 | ; Parameters: |
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| 187 | ; %1: Destination WORD Register for bit index (not CX or same as %2!) |
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| 188 | ; %2: Source WORD operand where to search bit (not CX or same as %1!) |
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| 189 | ; Returns: |
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| 190 | ; %1: Index of highest order bit from %2 |
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| 191 | ; ZF: Set if %2 is zero |
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| 192 | ; Cleared if %2 is non-zero |
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| 193 | ; Corrupts registers: |
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| 194 | ; Nothing |
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| 195 | ;-------------------------------------------------------------------- |
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| 196 | %macro eBSF 2 |
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| 197 | %ifndef USE_386 |
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| 198 | cmp WORD %2, BYTE 0 ; Source operand is zero? |
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| 199 | je SHORT %%Return ; If so, return with ZF set |
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| 200 | |
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| 201 | ; Set destination to zero and load mask for bit 0 |
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[592] | 202 | push cx |
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[41] | 203 | xor %1, %1 |
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| 204 | mov cx, 1 |
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| 205 | |
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| 206 | ALIGN JUMP_ALIGN |
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| 207 | %%BitLoop: |
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| 208 | test %2, cx ; Bit set? |
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[592] | 209 | jnz SHORT %%PopAndReturn; If so, return with ZF cleared |
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[41] | 210 | shl cx, 1 ; Prepare to test next bit |
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| 211 | inc %1 ; Increment bit index |
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| 212 | jmp SHORT %%BitLoop ; Loop until bit found |
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[592] | 213 | %%PopAndReturn: |
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| 214 | pop cx |
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[41] | 215 | %%Return: |
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| 216 | ;----------------------------------- |
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| 217 | %else |
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| 218 | bsf %1, %2 |
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| 219 | %endif |
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| 220 | %endmacro |
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| 221 | |
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| 222 | |
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| 223 | ;-------------------------------------------------------------------- |
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| 224 | ; Emulates BSR (Bit Scan Reverse) instruction when necessary. |
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| 225 | ; BSR is used to find index of most significant bit. |
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| 226 | ; |
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| 227 | ; eBSR |
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| 228 | ; Parameters: |
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| 229 | ; %1: Destination WORD Register for bit index (not CX or same as %2!) |
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| 230 | ; %2: Source WORD operand where to search bit (not CX or same as %1!) |
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| 231 | ; Returns: |
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| 232 | ; %1: Index of highest order bit from %2 |
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| 233 | ; ZF: Set if %2 is zero |
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| 234 | ; Cleared if %2 is non-zero |
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| 235 | ; Corrupts registers: |
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| 236 | ; Nothing |
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| 237 | ;-------------------------------------------------------------------- |
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| 238 | %macro eBSR 2 |
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| 239 | %ifndef USE_386 |
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| 240 | cmp WORD %2, BYTE 0 ; Source operand is zero? |
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| 241 | je SHORT %%Return ; If so, return with ZF set |
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| 242 | |
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| 243 | ; Load mask for highest order bit |
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[592] | 244 | push cx |
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[41] | 245 | mov cx, 1<<15 |
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| 246 | mov %1, 15 |
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| 247 | |
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| 248 | ALIGN JUMP_ALIGN |
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| 249 | %%BitLoop: |
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| 250 | test %2, cx ; Bit set? |
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[592] | 251 | jnz SHORT %%PopAndReturn; If so, return with ZF cleared |
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[41] | 252 | shr cx, 1 ; Prepare to test next bit |
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| 253 | dec %1 ; Decrement bit index |
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| 254 | jmp SHORT %%BitLoop ; Loop until bit found |
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[592] | 255 | %%PopAndReturn: |
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| 256 | pop cx |
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[41] | 257 | %%Return: |
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| 258 | ;----------------------------------- |
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| 259 | %else |
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| 260 | bsr %1, %2 |
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| 261 | %endif |
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| 262 | %endmacro |
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| 263 | |
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| 264 | |
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| 265 | ;-------------------------------------------------------------------- |
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| 266 | ; Conditional Move. |
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| 267 | ; |
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| 268 | ; eCMOVcc |
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| 269 | ; Parameters: |
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| 270 | ; %1: Destination data |
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| 271 | ; %2: Source data |
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| 272 | ; Returns: |
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| 273 | ; Nothing |
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| 274 | ; Corrupts registers: |
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| 275 | ; Nothing |
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| 276 | ;-------------------------------------------------------------------- |
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[146] | 277 | %macro eCMOVA 2 |
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| 278 | jbe SHORT %%Return |
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| 279 | mov %1, %2 |
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| 280 | %%Return: |
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| 281 | %endmacro |
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| 282 | |
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[41] | 283 | %macro eCMOVC 2 |
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| 284 | jnc SHORT %%Return |
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| 285 | mov %1, %2 |
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| 286 | %%Return: |
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| 287 | %endmacro |
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| 288 | |
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[390] | 289 | %macro eCMOVNC 2 |
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| 290 | jc SHORT %%Return |
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| 291 | mov %1, %2 |
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| 292 | %%Return: |
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| 293 | %endmacro |
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| 294 | |
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[64] | 295 | %macro eCMOVZ 2 |
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| 296 | jnz SHORT %%Return |
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| 297 | mov %1, %2 |
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| 298 | %%Return: |
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| 299 | %endmacro |
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| 300 | |
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[94] | 301 | %macro eCMOVNZ 2 |
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| 302 | jz SHORT %%Return |
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[41] | 303 | mov %1, %2 |
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| 304 | %%Return: |
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| 305 | %endmacro |
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| 306 | |
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[94] | 307 | %macro eCMOVE 2 |
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[592] | 308 | eCMOVZ %1, %2 |
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[94] | 309 | %endmacro |
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| 310 | |
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| 311 | %macro eCMOVNE 2 |
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[592] | 312 | eCMOVNZ %1, %2 |
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[94] | 313 | %endmacro |
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| 314 | |
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[60] | 315 | %macro eCMOVB 2 |
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[592] | 316 | eCMOVC %1, %2 |
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[60] | 317 | %endmacro |
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[41] | 318 | |
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[390] | 319 | %macro eCMOVS 2 |
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| 320 | jns SHORT %%Return |
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| 321 | mov %1, %2 |
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| 322 | %%Return: |
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| 323 | %endmacro |
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[41] | 324 | |
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[396] | 325 | %macro eCMOVNS 2 |
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| 326 | js SHORT %%Return |
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| 327 | mov %1, %2 |
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| 328 | %%Return: |
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| 329 | %endmacro |
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[390] | 330 | |
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[396] | 331 | |
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[168] | 332 | ;-------------------------------------------------------------------- |
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| 333 | ; Conditional Set. |
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| 334 | ; |
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[592] | 335 | ; eSETcc |
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[168] | 336 | ; Parameters: |
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| 337 | ; %1: Destination data |
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| 338 | ; Returns: |
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| 339 | ; Nothing |
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| 340 | ; Corrupts registers: |
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| 341 | ; Flags |
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| 342 | ;-------------------------------------------------------------------- |
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[592] | 343 | %macro eSETZ 1 |
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[168] | 344 | mov %1, 0 ; Clear while preserving flags |
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| 345 | jnz SHORT %%Return ; Nothing to set |
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| 346 | inc %1 |
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| 347 | %%Return: |
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| 348 | %endmacro |
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[60] | 349 | |
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[592] | 350 | %macro eSETNZ 1 |
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[586] | 351 | mov %1, 0 ; Clear while preserving flags |
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| 352 | jz SHORT %%Return ; Nothing to set |
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| 353 | inc %1 |
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| 354 | %%Return: |
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| 355 | %endmacro |
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[168] | 356 | |
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[586] | 357 | |
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[41] | 358 | ;-------------------------------------------------------------------- |
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| 359 | ; Moves byte with zero-extending to any Register. |
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| 360 | ; |
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| 361 | ; eMOVZX |
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| 362 | ; Parameters: |
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| 363 | ; %1: Destination Register (SP not supported) |
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| 364 | ; %2: Byte register or byte address |
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| 365 | ; Returns: |
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| 366 | ; Nothing |
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| 367 | ; Corrupts registers: |
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| 368 | ; FLAGS |
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| 369 | ;-------------------------------------------------------------------- |
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| 370 | %macro eMOVZX 2 |
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| 371 | %ifndef USE_386 |
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| 372 | %ifidni %1, ax |
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| 373 | mov al, %2 |
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| 374 | xor ah, ah |
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| 375 | %elifidni %1, bx |
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| 376 | mov bl, %2 |
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| 377 | xor bh, bh ; %2 may use BX in effective address |
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| 378 | %elifidni %1, cx |
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| 379 | mov cl, %2 |
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| 380 | xor ch, ch |
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| 381 | %elifidni %1, dx |
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| 382 | mov dl, %2 |
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| 383 | xor dh, dh |
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| 384 | %else ; SI, DI, BP (all may be used in effective address) |
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[592] | 385 | FSIS %1, %2 |
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| 386 | %if strpos |
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| 387 | push ax |
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| 388 | mov al, %2 |
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| 389 | xor ah, ah |
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| 390 | xchg %1, ax |
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| 391 | pop ax |
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| 392 | %else |
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| 393 | xchg %1, ax |
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| 394 | mov al, %2 |
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| 395 | xor ah, ah |
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| 396 | xchg %1, ax |
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| 397 | %endif |
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[41] | 398 | %endif |
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| 399 | ;----------------------------------- |
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| 400 | %else |
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| 401 | movzx %1, %2 |
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| 402 | %endif |
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| 403 | %endmacro |
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| 404 | |
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| 405 | |
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| 406 | ;-------------------------------------------------------------------- |
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| 407 | ; Emulates PUSHA instruction when necessary. |
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| 408 | ; |
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| 409 | ; ePUSHA |
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| 410 | ; Parameters: |
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| 411 | ; Nothing |
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| 412 | ; Returns: |
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| 413 | ; Nothing |
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| 414 | ; Corrupts registers: |
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| 415 | ; Nothing |
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| 416 | ;-------------------------------------------------------------------- |
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| 417 | %macro ePUSHA 0 |
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| 418 | %ifndef USE_186 |
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| 419 | push ax |
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| 420 | push cx |
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| 421 | push dx |
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| 422 | push bx |
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[113] | 423 | push sp |
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[41] | 424 | push bp |
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| 425 | push si |
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| 426 | push di |
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| 427 | ;----------------------------------- |
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| 428 | %else |
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| 429 | pusha |
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| 430 | %endif |
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| 431 | %endmacro |
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| 432 | |
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| 433 | |
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| 434 | ;-------------------------------------------------------------------- |
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| 435 | ; Emulates POPA instruction when necessary. |
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| 436 | ; |
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| 437 | ; ePOPA |
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| 438 | ; Parameters: |
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| 439 | ; Nothing |
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| 440 | ; Returns: |
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| 441 | ; Nothing |
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| 442 | ; Corrupts registers: |
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| 443 | ; Nothing |
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| 444 | ;-------------------------------------------------------------------- |
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| 445 | %macro ePOPA 0 |
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| 446 | %ifndef USE_186 |
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| 447 | pop di |
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| 448 | pop si |
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| 449 | pop bp |
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[113] | 450 | pop ax ; Skip SP |
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[41] | 451 | pop bx |
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| 452 | pop dx |
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| 453 | pop cx |
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| 454 | pop ax |
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| 455 | ;----------------------------------- |
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| 456 | %else |
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| 457 | popa |
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| 458 | %endif |
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| 459 | %endmacro |
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| 460 | |
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| 461 | |
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| 462 | ;-------------------------------------------------------------------- |
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| 463 | ; Emulates ENTER instruction when necessary. |
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| 464 | ; |
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| 465 | ; eENTER |
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| 466 | ; Parameters: |
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| 467 | ; %1: Number of bytes to reserve from stack |
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| 468 | ; %2: The lexical nesting level (not emulated, set to 0) |
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| 469 | ; Returns: |
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| 470 | ; SS:BP: Ptr to old BP |
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| 471 | ; ([bp-2] points to highest local stack frame word) |
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| 472 | ; Corrupts registers: |
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| 473 | ; FLAGS |
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| 474 | ;-------------------------------------------------------------------- |
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| 475 | %macro eENTER 2 |
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| 476 | %ifndef USE_186 |
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| 477 | push bp |
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| 478 | mov bp, sp |
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| 479 | sub sp, %1 |
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| 480 | ;----------------------------------- |
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| 481 | %else |
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| 482 | enter %1, %2 |
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| 483 | %endif |
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| 484 | %endmacro |
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| 485 | |
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| 486 | ;-------------------------------------------------------------------- |
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| 487 | ; Emulates LEAVE instruction when necessary. |
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| 488 | ; |
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| 489 | ; eLEAVE |
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| 490 | ; Parameters: |
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| 491 | ; Nothing |
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| 492 | ; Returns: |
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| 493 | ; BP: What it was before eENTER |
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| 494 | ; Corrupts registers: |
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| 495 | ; Nothing |
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| 496 | ;-------------------------------------------------------------------- |
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| 497 | %macro eLEAVE 0 |
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| 498 | %ifndef USE_186 |
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| 499 | mov sp, bp |
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| 500 | pop bp |
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| 501 | ;----------------------------------- |
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| 502 | %else |
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| 503 | leave |
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| 504 | %endif |
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| 505 | %endmacro |
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| 506 | |
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| 507 | |
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| 508 | ;-------------------------------------------------------------------- |
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| 509 | ; Emulates LSS instruction when necessary. |
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| 510 | ; |
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| 511 | ; eLSS |
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| 512 | ; Parameters: |
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| 513 | ; %1: Destination register |
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| 514 | ; %2: Source memory address without brackets |
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| 515 | ; Returns: |
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| 516 | ; IF: 0 (interrupts disabled) |
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| 517 | ; Corrupts registers: |
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| 518 | ; Nothing |
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| 519 | ;-------------------------------------------------------------------- |
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| 520 | %macro eLSS 2 |
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| 521 | %ifndef USE_386 |
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| 522 | cli ; Disable interrupts |
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| 523 | mov %1, [%2] ; Load offset |
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| 524 | mov ss, [%2+2] ; Load segment |
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| 525 | ;----------------------------------- |
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| 526 | %else |
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| 527 | lss %1, [%2] |
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| 528 | %endif |
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| 529 | %endmacro |
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| 530 | |
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| 531 | |
---|
| 532 | ;-------------------------------------------------------------------- |
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| 533 | ; Repeats string instruction with segment override. |
---|
| 534 | ; This macro prevents 8088/8086 restart bug. |
---|
| 535 | ; |
---|
| 536 | ; eSEG_STR |
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| 537 | ; Parameters: |
---|
[592] | 538 | ; %1: REP/REPE/REPZ or REPNE/REPNZ prefix |
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[41] | 539 | ; %2: Source segment override (destination is always ES) |
---|
| 540 | ; %3: String instruction |
---|
| 541 | ; CX: Repeat count |
---|
| 542 | ; Returns: |
---|
| 543 | ; FLAGS for cmps and scas only |
---|
| 544 | ; Corrupts registers: |
---|
[592] | 545 | ; FLAGS |
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[41] | 546 | ;-------------------------------------------------------------------- |
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| 547 | %macro eSEG_STR 3 |
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| 548 | %ifndef USE_186 ; 8088/8086 has string instruction restart bug when more than one prefix |
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[223] | 549 | %%Loop: |
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| 550 | %1 ; REP is the prefix that can be lost |
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| 551 | %2 ; SEG is the prefix that won't be lost |
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| 552 | %3 ; String instruction |
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[592] | 553 | FSIS cmps, %3 |
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| 554 | %ifn strpos |
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| 555 | FSIS scas, %3 |
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| 556 | %endif |
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| 557 | %if strpos ; Must preserve FLAGS |
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[223] | 558 | jcxz %%End ; Jump to end if no repeats left (preserves FLAGS) |
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| 559 | jmp SHORT %%Loop ; Loop while repeats left |
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| 560 | %%End: |
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[592] | 561 | %else ; No need to preserve FLAGS |
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| 562 | inc cx |
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| 563 | loop %%Loop |
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| 564 | %endif |
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[41] | 565 | %else ; No bug on V20/V30 and later, don't know about 188/186 |
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[223] | 566 | %2 |
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| 567 | %1 %3 |
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[41] | 568 | %endif |
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| 569 | %endmacro |
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| 570 | |
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| 571 | |
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| 572 | ;-------------------------------------------------------------------- |
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| 573 | ; Bit shifts and rotates with immediate. |
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| 574 | ; |
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| 575 | ; eSHIFT_IM |
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| 576 | ; Parameters: |
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| 577 | ; %1: Shift target |
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| 578 | ; %2: Number of bits to shift |
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| 579 | ; %3: Instruction (SHL, SHR, ROL, ROR, RCL, RCR) |
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| 580 | ; Returns: |
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| 581 | ; FLAGS |
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| 582 | ; Corrupts registers: |
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| 583 | ; Nothing |
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| 584 | ;-------------------------------------------------------------------- |
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| 585 | %macro eSHIFT_IM 3 |
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[488] | 586 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS |
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[41] | 587 | %ifndef USE_186 |
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| 588 | %ifidni %1, cl |
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| 589 | times %2 %3 %1, 1 |
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| 590 | %elifidni %1, ch |
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| 591 | times %2 %3 %1, 1 |
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| 592 | %elifidni %1, cx |
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| 593 | times %2 %3 %1, 1 |
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| 594 | %else |
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[181] | 595 | %if %2 > 3 ; Size optimized value |
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[41] | 596 | push cx |
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| 597 | mov cl, %2 |
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| 598 | %3 %1, cl |
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| 599 | pop cx |
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| 600 | %else |
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| 601 | times %2 %3 %1, 1 |
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| 602 | %endif |
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| 603 | %endif |
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| 604 | ;----------------------------------- |
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| 605 | %else |
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| 606 | %3 %1, %2 |
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| 607 | %endif |
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[488] | 608 | %endif |
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[41] | 609 | %endmacro |
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[420] | 610 | |
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[41] | 611 | %macro eSHR_IM 2 |
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| 612 | eSHIFT_IM %1, %2, shr |
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| 613 | %endmacro |
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[445] | 614 | |
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[41] | 615 | %macro eSHL_IM 2 |
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[489] | 616 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS |
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[445] | 617 | %ifdef USE_386 |
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| 618 | %if %2 = 1 |
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[592] | 619 | FSIS ], %1 |
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| 620 | %if strpos |
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| 621 | eSHIFT_IM %1, %2, shl |
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| 622 | %else |
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| 623 | add %1, %1 ; Same size but faster on 386 and 486. |
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| 624 | %endif |
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[445] | 625 | %else |
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| 626 | eSHIFT_IM %1, %2, shl |
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| 627 | %endif |
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| 628 | %else |
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[41] | 629 | eSHIFT_IM %1, %2, shl |
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[445] | 630 | %endif |
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[489] | 631 | %endif |
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[41] | 632 | %endmacro |
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[445] | 633 | |
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[41] | 634 | %macro eROR_IM 2 |
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| 635 | eSHIFT_IM %1, %2, ror |
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| 636 | %endmacro |
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[445] | 637 | |
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[41] | 638 | %macro eROL_IM 2 |
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| 639 | eSHIFT_IM %1, %2, rol |
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| 640 | %endmacro |
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[445] | 641 | |
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[41] | 642 | %macro eRCR_IM 2 |
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| 643 | eSHIFT_IM %1, %2, rcr |
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| 644 | %endmacro |
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[445] | 645 | |
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[41] | 646 | %macro eRCL_IM 2 |
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[589] | 647 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS |
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| 648 | %ifdef USE_386 |
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| 649 | %if %2 = 1 |
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[592] | 650 | FSIS ], %1 |
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| 651 | %if strpos |
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| 652 | eSHIFT_IM %1, %2, rcl |
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| 653 | %else |
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| 654 | adc %1, %1 ; Same size but faster on 386 and 486. |
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| 655 | %endif |
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[589] | 656 | %else |
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| 657 | eSHIFT_IM %1, %2, rcl |
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| 658 | %endif |
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| 659 | %else |
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[41] | 660 | eSHIFT_IM %1, %2, rcl |
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[589] | 661 | %endif |
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| 662 | %endif |
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[41] | 663 | %endmacro |
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| 664 | |
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| 665 | |
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| 666 | ;-------------------------------------------------------------------- |
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| 667 | ; Emulates PUSH imm instruction when necessary. |
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| 668 | ; |
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| 669 | ; ePUSH_I |
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| 670 | ; Parameters: |
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| 671 | ; %1: Immediate to push |
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| 672 | ; Returns: |
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| 673 | ; Nothing |
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| 674 | ; Corrupts registers: |
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| 675 | ; Nothing |
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| 676 | ;-------------------------------------------------------------------- |
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| 677 | %macro ePUSH_I 1 |
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| 678 | %ifndef USE_186 |
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| 679 | push bp ; Immediate goes here |
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| 680 | push bp |
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| 681 | mov bp, sp |
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| 682 | mov WORD [bp+2], %1 |
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| 683 | pop bp |
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| 684 | ;----------------------------------- |
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| 685 | %else |
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| 686 | push %1 |
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| 687 | %endif |
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| 688 | %endmacro |
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| 689 | |
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| 690 | |
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| 691 | ;-------------------------------------------------------------------- |
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| 692 | ; Emulates PUSH imm instruction when necessary. |
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| 693 | ; ePUSH_T uses temporary register for faster performance |
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| 694 | ; and smaller code size than ePUSH_I. |
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| 695 | ; |
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| 696 | ; ePUSH_T |
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| 697 | ; Parameters: |
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| 698 | ; %1: Temporary Register |
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| 699 | ; %2: Immediate to push |
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| 700 | ; Returns: |
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| 701 | ; Nothing |
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| 702 | ; Corrupts registers: |
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| 703 | ; %1 |
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| 704 | ;-------------------------------------------------------------------- |
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| 705 | %macro ePUSH_T 2 |
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| 706 | %ifndef USE_186 |
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| 707 | %ifidni %2, 0 |
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| 708 | xor %1, %1 |
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| 709 | %else |
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| 710 | mov %1, %2 |
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| 711 | %endif |
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| 712 | push %1 |
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| 713 | ;----------------------------------- |
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| 714 | %else |
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| 715 | push %2 |
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| 716 | %endif |
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| 717 | %endmacro |
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| 718 | |
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| 719 | |
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| 720 | %endif ; EMULATE_INC |
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