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target-m68k: add/sub manage word and byte operands

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Backports commit 8a370c6cb770b618f7eb66628116c25e84588df8 from qemu
This commit is contained in:
Laurent Vivier 2018-02-28 07:17:44 -05:00 committed by Lioncash
parent bc27695926
commit fc28e8127f
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 27 additions and 19 deletions
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46
qemu/target-m68k/translate.c
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@ -1936,40 +1936,48 @@ DISAS_INSN(jump)
DISAS_INSN(addsubq)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
TCGv src1;
TCGv src2;
TCGv src;
TCGv dest;
int val;
TCGv val;
int imm;
TCGv addr;
int opsize;
SRC_EA(env, src1, OS_LONG, 0, &addr);
val = (insn >> 9) & 7;
if (val == 0)
val = 8;
if ((insn & 070) == 010) {
/* Operation on address register is always long. */
opsize = OS_LONG;
} else {
opsize = insn_opsize(insn);
}
SRC_EA(env, src, opsize, 1, &addr);
imm = (insn >> 9) & 7;
if (imm == 0) {
imm = 8;
}
val = tcg_const_i32(tcg_ctx, imm);
dest = tcg_temp_new(tcg_ctx);
tcg_gen_mov_i32(tcg_ctx, dest, src1);
tcg_gen_mov_i32(tcg_ctx, dest, src);
if ((insn & 0x38) == 0x08) {
/* Don't update condition codes if the destination is an
address register. */
if (insn & 0x0100) {
tcg_gen_subi_i32(tcg_ctx, dest, dest, val);
tcg_gen_sub_i32(tcg_ctx, dest, dest, val);
} else {
tcg_gen_addi_i32(tcg_ctx, dest, dest, val);
tcg_gen_add_i32(tcg_ctx, dest, dest, val);
}
} else {
src2 = tcg_const_i32(tcg_ctx, val);
if (insn & 0x0100) {
tcg_gen_setcond_i32(tcg_ctx, TCG_COND_LTU, tcg_ctx->QREG_CC_X, dest, src2);
tcg_gen_sub_i32(tcg_ctx, dest, dest, src2);
set_cc_op(s, CC_OP_SUBL);
tcg_gen_setcond_i32(tcg_ctx, TCG_COND_LTU, tcg_ctx->QREG_CC_X, dest, val);
tcg_gen_sub_i32(tcg_ctx, dest, dest, val);
set_cc_op(s, CC_OP_SUBB + opsize);
} else {
tcg_gen_add_i32(tcg_ctx, dest, dest, src2);
tcg_gen_setcond_i32(tcg_ctx, TCG_COND_LTU, tcg_ctx->QREG_CC_X, dest, src2);
set_cc_op(s, CC_OP_ADDL);
tcg_gen_add_i32(tcg_ctx, dest, dest, val);
tcg_gen_setcond_i32(tcg_ctx, TCG_COND_LTU, tcg_ctx->QREG_CC_X, dest, val);
set_cc_op(s, CC_OP_ADDB + opsize);
}
gen_update_cc_add(s, dest, src2, OS_LONG);
gen_update_cc_add(s, dest, val, opsize);
}
DEST_EA(env, insn, OS_LONG, dest, &addr);
DEST_EA(env, insn, opsize, dest, &addr);
}
DISAS_INSN(tpf)