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target-m68k: some bit ops cleanup

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Backports commit 3c980d2ef664e6d5a1a0c98aca4d11d33b17ca59 from qemu
This commit is contained in:
Laurent Vivier 2018-02-28 01:23:32 -05:00 committed by Lioncash
parent cfab571859
commit 4e257ffda9
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 14 additions and 18 deletions
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32
qemu/target-m68k/translate.c
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@ -1300,38 +1300,35 @@ DISAS_INSN(bitop_reg)
opsize = OS_LONG;
op = (insn >> 6) & 3;
gen_flush_flags(s);
SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
src2 = DREG(insn, 9);
dest = tcg_temp_new(tcg_ctx);
tmp = tcg_temp_new(tcg_ctx);
gen_flush_flags(s);
src2 = tcg_temp_new(tcg_ctx);
if (opsize == OS_BYTE)
tcg_gen_andi_i32(tcg_ctx, tmp, src2, 7);
tcg_gen_andi_i32(tcg_ctx, src2, DREG(insn, 9), 7);
else
tcg_gen_andi_i32(tcg_ctx, tmp, src2, 31);
tcg_gen_andi_i32(tcg_ctx, src2, DREG(insn, 9), 31);
src2 = tcg_const_i32(tcg_ctx, 1);
tcg_gen_shl_i32(tcg_ctx, src2, src2, tmp);
tcg_temp_free(tcg_ctx, tmp);
tmp = tcg_const_i32(tcg_ctx, 1);
tcg_gen_shl_i32(tcg_ctx, tmp, tmp, src2);
tcg_temp_free(tcg_ctx, src2);
tcg_gen_and_i32(tcg_ctx, tcg_ctx->QREG_CC_Z, src1, src2);
tcg_gen_and_i32(tcg_ctx, tcg_ctx->QREG_CC_Z, src1, tmp);
dest = tcg_temp_new(tcg_ctx);
switch (op) {
case 1: /* bchg */
tcg_gen_xor_i32(tcg_ctx, dest, src1, src2);
tcg_gen_xor_i32(tcg_ctx, dest, src1, tmp);
break;
case 2: /* bclr */
tcg_gen_andc_i32(tcg_ctx, dest, src1, src2);
tcg_gen_andc_i32(tcg_ctx, dest, src1, tmp);
break;
case 3: /* bset */
tcg_gen_or_i32(tcg_ctx, dest, src1, src2);
tcg_gen_or_i32(tcg_ctx, dest, src1, tmp);
break;
default: /* btst */
break;
}
tcg_temp_free(tcg_ctx, src2);
tcg_temp_free(tcg_ctx, tmp);
if (op) {
DEST_EA(env, insn, opsize, dest, &addr);
}
@ -1419,10 +1416,9 @@ DISAS_INSN(bitop_im)
return;
}
gen_flush_flags(s);
SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
gen_flush_flags(s);
if (opsize == OS_BYTE)
bitnum &= 7;
else