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comparison 68kinst.c @ 3:a4ad0e3e3e0e

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Finish mulu.w, muls.w and abcd parameter decoding
author Mike Pavone <pavone@retrodev.com>
date Sat, 03 Nov 2012 22:15:55 -0700
parents 5df303bf72e6
children 6f6a2d7cc889
comparison
equal deleted inserted replaced
2:5df303bf72e6 3:a4ad0e3e3e0e
405 //data register direct not allowed when <ea> is the source (operand order bit of 1) 405 //data register direct not allowed when <ea> is the source (operand order bit of 1)
406 if (*istream & 0x100) { 406 if (*istream & 0x100) {
407 if ((*istream & 0xC0) == 0xC0) { 407 if ((*istream & 0xC0) == 0xC0) {
408 decoded->op = M68K_MULS; 408 decoded->op = M68K_MULS;
409 decoded->extra.size = OPSIZE_WORD; 409 decoded->extra.size = OPSIZE_WORD;
410 decoded->dst.addr_mode = MODE_REG;
411 decoded->dst.params.regs.pri = m68K_reg_quick_field(*istream);
410 istream = m68k_decode_op(istream, OPSIZE_WORD, &(decoded->src)); 412 istream = m68k_decode_op(istream, OPSIZE_WORD, &(decoded->src));
411 } else if(!(*istream & 0xF0)) { 413 } else if(!(*istream & 0xF0)) {
412 decoded->op = M68K_ABCD; 414 decoded->op = M68K_ABCD;
415 decoded->extra.size = OPSIZE_BYTE;
416 decoded->src.params.regs.pri = *istream & 0x7;
417 decoded->dst.params.regs.pri = m68K_reg_quick_field(*istream);
418 decoded->dst.addr_mode = decoded->src.addr_mode = (*istream & 8) ? MODE_AREG_PREDEC : MODE_REG;
413 } else if(!(*istream & 0x30)) { 419 } else if(!(*istream & 0x30)) {
414 decoded->op = M68K_EXG; 420 decoded->op = M68K_EXG;
415 decoded->extra.size = OPSIZE_LONG; 421 decoded->extra.size = OPSIZE_LONG;
416 decoded->src.params.regs.pri = m68K_reg_quick_field(*istream); 422 decoded->src.params.regs.pri = m68K_reg_quick_field(*istream);
417 decoded->dst.params.regs.pri = *istream & 0x7; 423 decoded->dst.params.regs.pri = *istream & 0x7;
434 } 440 }
435 } else { 441 } else {
436 if ((*istream & 0xC0) == 0xC0) { 442 if ((*istream & 0xC0) == 0xC0) {
437 decoded->op = M68K_MULU; 443 decoded->op = M68K_MULU;
438 decoded->extra.size = OPSIZE_WORD; 444 decoded->extra.size = OPSIZE_WORD;
445 decoded->dst.addr_mode = MODE_REG;
446 decoded->dst.params.regs.pri = m68K_reg_quick_field(*istream);
439 istream = m68k_decode_op(istream, OPSIZE_WORD, &(decoded->src)); 447 istream = m68k_decode_op(istream, OPSIZE_WORD, &(decoded->src));
440 } else { 448 } else {
441 decoded->op = M68K_AND; 449 decoded->op = M68K_AND;
442 decoded->extra.size = (*istream >> 6); 450 decoded->extra.size = (*istream >> 6);
443 decoded->src.addr_mode = MODE_REG; 451 decoded->src.addr_mode = MODE_REG;