From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57197) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c19En-0005Eb-I6 for qemu-devel@nongnu.org; Mon, 31 Oct 2016 05:50:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c19Ej-0005hO-M4 for qemu-devel@nongnu.org; Mon, 31 Oct 2016 05:50:41 -0400 Received: from mout.kundenserver.de ([217.72.192.73]:50046) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1c19Ej-0005eQ-Ch for qemu-devel@nongnu.org; Mon, 31 Oct 2016 05:50:37 -0400 From: Laurent Vivier Date: Mon, 31 Oct 2016 10:50:30 +0100 Message-Id: <1477907431-10008-2-git-send-email-laurent@vivier.eu> In-Reply-To: <1477907431-10008-1-git-send-email-laurent@vivier.eu> References: <1477907431-10008-1-git-send-email-laurent@vivier.eu> Subject: [Qemu-devel] [PULL 1/2] target-m68k: add cmpm List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Laurent Vivier Signed-off-by: Laurent Vivier Reviewed-by: Richard Henderson --- 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