diff options
| -rw-r--r-- | target/m68k/translate.c | 53 |
1 files changed, 46 insertions, 7 deletions
diff --git a/target/m68k/translate.c b/target/m68k/translate.c index 8f23cade04..499aaa2f3d 100644 --- a/target/m68k/translate.c +++ b/target/m68k/translate.c @@ -2201,6 +2201,7 @@ DISAS_INSN(arith_im) TCGv dest; TCGv addr; int opsize; + bool with_SR = ((insn & 0x3f) == 0x3c); op = (insn >> 9) & 7; opsize = insn_opsize(insn); @@ -2217,32 +2218,73 @@ DISAS_INSN(arith_im) default: abort(); } - SRC_EA(env, src1, opsize, 1, (op == 6) ? NULL : &addr); + + if (with_SR) { + /* SR/CCR can only be used with andi/eori/ori */ + if (op == 2 || op == 3 || op == 6) { + disas_undef(env, s, insn); + return; + } + switch (opsize) { + case OS_BYTE: + src1 = gen_get_ccr(s); + break; + case OS_WORD: + if (IS_USER(s)) { + gen_exception(s, s->insn_pc, EXCP_PRIVILEGE); + return; + } + src1 = gen_get_sr(s); + break; + case OS_LONG: + disas_undef(env, s, insn); + return; + } + } else { + SRC_EA(env, src1, opsize, 1, (op == 6) ? NULL : &addr); + } dest = tcg_temp_new(); switch (op) { case 0: /* ori */ tcg_gen_or_i32(dest, src1, im); - gen_logic_cc(s, dest, opsize); + if (with_SR) { + gen_set_sr(s, dest, opsize == OS_BYTE); + } else { + DEST_EA(env, insn, opsize, dest, &addr); + gen_logic_cc(s, dest, opsize); + } break; case 1: /* andi */ tcg_gen_and_i32(dest, src1, im); - gen_logic_cc(s, dest, opsize); + if (with_SR) { + gen_set_sr(s, dest, opsize == OS_BYTE); + } else { + DEST_EA(env, insn, opsize, dest, &addr); + gen_logic_cc(s, dest, opsize); + } break; case 2: /* subi */ tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, src1, im); tcg_gen_sub_i32(dest, src1, im); gen_update_cc_add(dest, im, opsize); set_cc_op(s, CC_OP_SUBB + opsize); + DEST_EA(env, insn, opsize, dest, &addr); break; case 3: /* addi */ tcg_gen_add_i32(dest, src1, im); gen_update_cc_add(dest, im, opsize); tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, im); set_cc_op(s, CC_OP_ADDB + opsize); + DEST_EA(env, insn, opsize, dest, &addr); break; case 5: /* eori */ tcg_gen_xor_i32(dest, src1, im); - gen_logic_cc(s, dest, opsize); + if (with_SR) { + gen_set_sr(s, dest, opsize == OS_BYTE); + } else { + DEST_EA(env, insn, opsize, dest, &addr); + gen_logic_cc(s, dest, opsize); + } break; case 6: /* cmpi */ gen_update_cc_cmp(s, src1, im, opsize); @@ -2251,9 +2293,6 @@ DISAS_INSN(arith_im) abort(); } tcg_temp_free(im); - if (op != 6) { - DEST_EA(env, insn, opsize, dest, &addr); - } tcg_temp_free(dest); } |