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Re: [Qemu-devel] [PATCH v7 08/16] target-or32: Add instruction translati
From: |
Max Filippov |
Subject: |
Re: [Qemu-devel] [PATCH v7 08/16] target-or32: Add instruction translation |
Date: |
Wed, 27 Jun 2012 15:03:23 +0400 |
On Wed, Jun 27, 2012 at 1:54 PM, Jia Liu <address@hidden> wrote:
> Add OpenRISC instruction tanslation routines.
>
> Signed-off-by: Jia Liu <address@hidden>
[...]
> + case 0x0009:
> + switch (op1) {
> + case 0x03: /* l.div */
> + LOG_DIS("l.div r%d, r%d, r%d\n", rd, ra, rb);
> + {
> + int lab0 = gen_new_label();
> + int lab1 = gen_new_label();
> + int lab2 = gen_new_label();
> + int lab3 = gen_new_label();
> + TCGv_i32 sr_ove = tcg_temp_local_new_i32();
> + if (rb == 0) {
> + tcg_gen_ori_tl(cpu_sr, cpu_sr, (SR_OV | SR_CY));
> + tcg_gen_andi_tl(sr_ove, cpu_sr, SR_OVE);
> + tcg_gen_brcondi_tl(TCG_COND_NE, sr_ove, SR_OVE, lab0);
> + gen_exception(dc, EXCP_RANGE);
> + gen_set_label(lab0);
> + } else {
> + tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_R[rb],
> + 0x00000000, lab1);
> + tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[ra],
> + 0x80000000, lab2);
> + tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[rb],
> + 0xffffffff, lab2);
> + gen_set_label(lab1);
> + tcg_gen_ori_tl(cpu_sr, cpu_sr, (SR_OV | SR_CY));
> + tcg_gen_andi_tl(sr_ove, cpu_sr, SR_OVE);
> + tcg_gen_brcondi_tl(TCG_COND_EQ, sr_ove, SR_OVE, lab3);
You used to have
tcg_gen_brcondi_tl(TCG_COND_NE, sr_ove, SR_OVE, lab2)
here in previous series, why do you change NE to EQ?
> + gen_exception(dc, EXCP_RANGE);
> + gen_set_label(lab2);
> + tcg_gen_div_tl(cpu_R[rd], cpu_R[ra], cpu_R[rb]);
> + gen_set_label(lab3);
> + }
> + tcg_temp_free_i32(sr_ove);
> + }
> + break;
> +
> + default:
> + gen_illegal_exception(dc);
> + break;
> + }
> + break;
> +
> + case 0x000a:
> + switch (op1) {
> + case 0x03: /* l.divu */
> + LOG_DIS("l.divu r%d, r%d, r%d\n", rd, ra, rb);
> + {
> + int lab0 = gen_new_label();
> + int lab1 = gen_new_label();
> + int lab2 = gen_new_label();
> + TCGv_i32 sr_ove = tcg_temp_local_new_i32();
> + if (rb == 0) {
> + tcg_gen_ori_tl(cpu_sr, cpu_sr, (SR_OV | SR_CY));
> + tcg_gen_andi_tl(sr_ove, cpu_sr, SR_OVE);
> + tcg_gen_brcondi_tl(TCG_COND_NE, sr_ove, SR_OVE, lab0);
> + gen_exception(dc, EXCP_RANGE);
> + gen_set_label(lab0);
> + } else {
> + tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[rb],
> + 0x00000000, lab1);
> + tcg_gen_ori_tl(cpu_sr, cpu_sr, (SR_OV | SR_CY));
> + tcg_gen_andi_tl(sr_ove, cpu_sr, SR_OVE);
> + tcg_gen_brcondi_tl(TCG_COND_EQ, sr_ove, SR_OVE, lab2);
Same here.
> + gen_exception(dc, EXCP_RANGE);
> + gen_set_label(lab1);
> + tcg_gen_divu_tl(cpu_R[rd], cpu_R[ra], cpu_R[rb]);
> + gen_set_label(lab2);
> + }
> + tcg_temp_free_i32(sr_ove);
> + }
> + break;
--
Thanks.
-- Max
- [Qemu-devel] [PATCH v7 00/16] QEMU OpenRISC support, Jia Liu, 2012/06/27
- [Qemu-devel] [PATCH v7 01/16] target-or32: Add target stubs and cpu support, Jia Liu, 2012/06/27
- [Qemu-devel] [PATCH v7 02/16] target-or32: Add target machine, Jia Liu, 2012/06/27
- [Qemu-devel] [PATCH v7 03/16] target-or32: Add MMU support, Jia Liu, 2012/06/27
- [Qemu-devel] [PATCH v7 04/16] target-or32: Add interrupt support, Jia Liu, 2012/06/27
- [Qemu-devel] [PATCH v7 05/16] target-or32: Add exception support, Jia Liu, 2012/06/27
- [Qemu-devel] [PATCH v7 06/16] target-or32: Add int instruction helpers, Jia Liu, 2012/06/27
- [Qemu-devel] [PATCH v7 07/16] target-or32: Add float instruction helpers, Jia Liu, 2012/06/27
- [Qemu-devel] [PATCH v7 08/16] target-or32: Add instruction translation, Jia Liu, 2012/06/27
- Re: [Qemu-devel] [PATCH v7 08/16] target-or32: Add instruction translation,
Max Filippov <=
[Qemu-devel] [PATCH v7 11/16] target-or32: Add a IIS dummy board, Jia Liu, 2012/06/27
- Re: [Qemu-devel] [PATCH v7 11/16] target-or32: Add a IIS dummy board, Peter Crosthwaite, 2012/06/27
- Re: [Qemu-devel] [PATCH v7 11/16] target-or32: Add a IIS dummy board, Andreas Färber, 2012/06/27
- Re: [Qemu-devel] [PATCH v7 11/16] target-or32: Add a IIS dummy board, Peter Crosthwaite, 2012/06/27
- Re: [Qemu-devel] [PATCH v7 11/16] target-or32: Add a IIS dummy board, Jia Liu, 2012/06/28
- Re: [Qemu-devel] [PATCH v7 11/16] target-or32: Add a IIS dummy board, Wei-Ren Chen, 2012/06/28
- Re: [Qemu-devel] [PATCH v7 11/16] target-or32: Add a IIS dummy board, Jia Liu, 2012/06/29