motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-08 10:13:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target-alpha: Merge HW_REI and HW_RET implementations.

Browse source 
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2011-05-20 13:21:15 -07:00 • committed by Richard Henderson
parent 8417845ee9
commit 508b43eaf3
3 changed files with 8 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

19
target-alpha/translate.c
View file

@ -2876,25 +2876,22 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
break;
#endif
case 0x1E:
/* HW_REI (PALcode) */
/* HW_RET (PALcode) */
#if defined (CONFIG_USER_ONLY)
goto invalid_opc;
#else
if (!ctx->pal_mode)
goto invalid_opc;
if (rb == 31) {
/* "Old" alpha */
gen_helper_hw_rei();
} else {
TCGv tmp;
if (ra != 31) {
tmp = tcg_temp_new();
tcg_gen_addi_i64(tmp, cpu_ir[rb], (((int64_t)insn << 51) >> 51));
} else
tmp = tcg_const_i64(((int64_t)insn << 51) >> 51);
/* Pre-EV6 CPUs interpreted this as HW_REI, loading the return
address from EXC_ADDR. This turns out to be useful for our
emulation PALcode, so continue to accept it. */
TCGv tmp = tcg_temp_new();
tcg_gen_ld_i64(tmp, cpu_env, offsetof(CPUState, ipr[IPR_EXC_ADDR]));
gen_helper_hw_ret(tmp);
tcg_temp_free(tmp);
} else {
gen_helper_hw_ret(cpu_ir[rb]);
}
ret = EXIT_PC_UPDATED;
break;