Signed-off-by: Laurent Vivier <laur...@vivier.eu>
Reviewed-by: Richard Henderson <r...@twiddle.net>
---
target-m68k/translate.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index ee0ffe3..92e67eb 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -2173,6 +2173,33 @@ DISAS_INSN(cmpa)
gen_update_cc_cmp(s, reg, src, opsize);
}
+DISAS_INSN(cmpm)
+{
+ int opsize = insn_opsize(insn);
+ TCGv tmp = tcg_temp_new();
+ TCGv src, dst, addr;
+
+ src = gen_load(s, opsize, AREG(insn, 0), 1);
+ /* delay the update after the second gen_load() */
+ tcg_gen_addi_i32(tmp, AREG(insn, 0), opsize_bytes(opsize));
+
+ /* but if the we use the same address register to
+ * read the second value, we must use the updated address
+ */
+ if (REG(insn, 0) == REG(insn, 9)) {
+ addr = tmp;
+ } else {
+ addr = AREG(insn, 9);
+ }
+
+ dst = gen_load(s, opsize, addr, 1);
+ tcg_gen_mov_i32(AREG(insn, 0), tmp);
+ tcg_gen_addi_i32(AREG(insn, 9), addr, opsize_bytes(opsize));
+ tcg_temp_free(tmp);
+
+ gen_update_cc_cmp(s, dst, src, opsize);
+}
+
DISAS_INSN(eor)
{
TCGv src;
@@ -3414,6 +3441,7 @@ void register_m68k_insns (CPUM68KState *env)
INSN(cmpa, b1c0, f1c0, CF_ISA_A);
INSN(cmp, b000, f100, M68000);
INSN(eor, b100, f100, M68000);
+ INSN(cmpm, b108, f138, M68000);
INSN(cmpa, b0c0, f0c0, M68000);
INSN(eor, b180, f1c0, CF_ISA_A);
BASE(and, c000, f000);
--
2.7.4
