From bb3ce6cdea12ff00b998c5a1c6dbf2c83dba77c2 Mon Sep 17 00:00:00 2001 From: Kartik Agaram Date: Mon, 5 Oct 2020 10:16:46 -0700 Subject: 6956 --- subx_opcodes | 46 ++++++++++++++++++++++++++++++---------------- 1 file changed, 30 insertions(+), 16 deletions(-) diff --git a/subx_opcodes b/subx_opcodes index 6706a695..75a42e3e 100644 --- a/subx_opcodes +++ b/subx_opcodes @@ -51,16 +51,16 @@ Opcodes currently supported by SubX: 5f: pop top of stack to EDI (pop) 68: push imm32 to stack (push) 69: multiply rm32 by imm32 and store result in r32 - 72: jump disp8 bytes away if lesser (unsigned), if CF is set (jcc/jb/jnae) - 73: jump disp8 bytes away if greater or equal (unsigned), if CF is unset (jcc/jae/jnb) + 72: jump disp8 bytes away if lesser (addr, float), if CF is set (jcc/jb/jnae) + 73: jump disp8 bytes away if greater or equal (addr, float), if CF is unset (jcc/jae/jnb) 74: jump disp8 bytes away if equal, if ZF is set (jcc/jz/je) 75: jump disp8 bytes away if not equal, if ZF is not set (jcc/jnz/jne) - 76: jump disp8 bytes away if lesser or equal (unsigned), if ZF is set or CF is set (jcc/jbe/jna) - 77: jump disp8 bytes away if greater (unsigned), if ZF is unset and CF is unset (jcc/ja/jnbe) - 7c: jump disp8 bytes away if lesser (signed), if SF != OF (jcc/jl/jnge) - 7d: jump disp8 bytes away if greater or equal (signed), if SF == OF (jcc/jge/jnl) - 7e: jump disp8 bytes away if lesser or equal (signed), if ZF is set or SF != OF (jcc/jle/jng) - 7f: jump disp8 bytes away if greater (signed), if ZF is unset and SF == OF (jcc/jg/jnle) + 76: jump disp8 bytes away if lesser or equal (addr, float), if ZF is set or CF is set (jcc/jbe/jna) + 77: jump disp8 bytes away if greater (addr, float), if ZF is unset and CF is unset (jcc/ja/jnbe) + 7c: jump disp8 bytes away if lesser, if SF != OF (jcc/jl/jnge) + 7d: jump disp8 bytes away if greater or equal, if SF == OF (jcc/jge/jnl) + 7e: jump disp8 bytes away if lesser or equal, if ZF is set or SF != OF (jcc/jle/jng) + 7f: jump disp8 bytes away if greater, if ZF is unset and SF == OF (jcc/jg/jnle) 81: combine rm32 with imm32 based on subop (add/sub/and/or/xor/cmp) 87: swap the contents of r32 and rm32 (xchg) 88: copy r8 to r8/m8-at-r32 @@ -90,16 +90,17 @@ Opcodes currently supported by SubX: f4: halt (hlt) f7: negate/multiply/divide rm32 (with EAX and EDX if necessary) depending on subop (neg/mul/idiv) ff: increment/decrement/jump/push/call rm32 based on subop (inc/dec/jmp/push/call) - 0f 82: jump disp32 bytes away if lesser (unsigned), if CF is set (jcc/jb/jnae) - 0f 83: jump disp32 bytes away if greater or equal (unsigned), if CF is unset (jcc/jae/jnb) + 0f 2f: compare: set SF if x32 < xm32 (comiss) + 0f 82: jump disp32 bytes away if lesser (addr, float), if CF is set (jcc/jb/jnae) + 0f 83: jump disp32 bytes away if greater or equal (addr, float), if CF is unset (jcc/jae/jnb) 0f 84: jump disp32 bytes away if equal, if ZF is set (jcc/jz/je) 0f 85: jump disp32 bytes away if not equal, if ZF is not set (jcc/jnz/jne) - 0f 86: jump disp32 bytes away if lesser or equal (unsigned), if ZF is set or CF is set (jcc/jbe/jna) - 0f 87: jump disp32 bytes away if greater (unsigned), if ZF is unset and CF is unset (jcc/ja/jnbe) - 0f 8c: jump disp32 bytes away if lesser (signed), if SF != OF (jcc/jl/jnge) - 0f 8d: jump disp32 bytes away if greater or equal (signed), if SF == OF (jcc/jge/jnl) - 0f 8e: jump disp32 bytes away if lesser or equal (signed), if ZF is set or SF != OF (jcc/jle/jng) - 0f 8f: jump disp32 bytes away if greater (signed), if ZF is unset and SF == OF (jcc/jg/jnle) + 0f 86: jump disp32 bytes away if lesser or equal (addr, float), if ZF is set or CF is set (jcc/jbe/jna) + 0f 87: jump disp32 bytes away if greater (addr, float), if ZF is unset and CF is unset (jcc/ja/jnbe) + 0f 8c: jump disp32 bytes away if lesser, if SF != OF (jcc/jl/jnge) + 0f 8d: jump disp32 bytes away if greater or equal, if SF == OF (jcc/jge/jnl) + 0f 8e: jump disp32 bytes away if lesser or equal, if ZF is set or SF != OF (jcc/jle/jng) + 0f 8f: jump disp32 bytes away if greater, if ZF is unset and SF == OF (jcc/jg/jnle) 0f 92: set r8/m8-at-rm32 to 1 if lesser (unsigned), if CF is set, 0 otherwise (setcc/setb/setnae) 0f 93: set r8/m8-at-rm32 to 1 if greater or equal (unsigned), if CF is unset, 0 otherwise (setcc/setae/setnb) 0f 94: set r8/m8-at-rm32 to 1 if equal, if ZF is set, 0 otherwise (setcc/setz/sete) @@ -111,6 +112,19 @@ Opcodes currently supported by SubX: 0f 9e: set r8/m8-at-rm32 to 1 if lesser or equal (signed), if ZF is set or SF != OF, 0 otherwise (setcc/setle/setng) 0f 9f: set r8/m8-at-rm32 to 1 if greater (signed), if ZF is unset and SF == OF, 0 otherwise (setcc/setg/setnle) 0f af: multiply rm32 into r32 (imul) + f3 0f 10: copy xm32 to x32 (movss) + f3 0f 11: copy x32 to xm32 (movss) + f3 0f 2a: convert integer to floating-point (cvtsi2ss) + f3 0f 2d: convert floating-point to int (cvtss2si) + f3 0f 51: square root of float (sqrtss) + f3 0f 52: inverse square root of float (rsqrtss) + f3 0f 53: reciprocal of float (rcpss) + f3 0f 58: add floats (addss) + f3 0f 59: multiply floats (mulss) + f3 0f 5c: subtract floats (subss) + f3 0f 5d: minimum of two floats (minss) + f3 0f 5e: divide floats (divss) + f3 0f 5f: maximum of two floats (maxss) Run `bootstrap help instructions` for details on words like 'r32' and 'disp8'. For complete details on these instructions, consult the IA-32 manual (volume 2). There's various versions of it online, such as https://c9x.me/x86. -- cgit 1.4.1-2-gfad0 id='n59' href='#n59'>59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283