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Re: [PATCH 10/17] target/riscv: Use gpr_{src,dst} for RVA
From: |
Alistair Francis |
Subject: |
Re: [PATCH 10/17] target/riscv: Use gpr_{src,dst} for RVA |
Date: |
Thu, 15 Jul 2021 14:50:39 +1000 |
On Fri, Jul 9, 2021 at 2:39 PM Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Alistair
> ---
> target/riscv/insn_trans/trans_rva.c.inc | 42 +++++++++----------------
> 1 file changed, 14 insertions(+), 28 deletions(-)
>
> diff --git a/target/riscv/insn_trans/trans_rva.c.inc
> b/target/riscv/insn_trans/trans_rva.c.inc
> index ab2ec4f0a5..5bb5bbd09c 100644
> --- a/target/riscv/insn_trans/trans_rva.c.inc
> +++ b/target/riscv/insn_trans/trans_rva.c.inc
> @@ -18,11 +18,11 @@
> * this program. If not, see <http://www.gnu.org/licenses/>.
> */
>
> -static inline bool gen_lr(DisasContext *ctx, arg_atomic *a, MemOp mop)
> +static bool gen_lr(DisasContext *ctx, arg_atomic *a, MemOp mop)
> {
> - TCGv src1 = tcg_temp_new();
> + TCGv src1 = gpr_src(ctx, a->rs1);
> +
> /* Put addr in load_res, data in load_val. */
> - gen_get_gpr(src1, a->rs1);
> if (a->rl) {
> tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
> }
> @@ -33,30 +33,26 @@ static inline bool gen_lr(DisasContext *ctx, arg_atomic
> *a, MemOp mop)
> tcg_gen_mov_tl(load_res, src1);
> gen_set_gpr(a->rd, load_val);
>
> - tcg_temp_free(src1);
> return true;
> }
>
> -static inline bool gen_sc(DisasContext *ctx, arg_atomic *a, MemOp mop)
> +static bool gen_sc(DisasContext *ctx, arg_atomic *a, MemOp mop)
> {
> - TCGv src1 = tcg_temp_new();
> - TCGv src2 = tcg_temp_new();
> - TCGv dat = tcg_temp_new();
> + TCGv dest = gpr_dst(ctx, a->rd);
> + TCGv src1 = gpr_src(ctx, a->rs1);
> + TCGv src2 = gpr_src(ctx, a->rs2);
> TCGLabel *l1 = gen_new_label();
> TCGLabel *l2 = gen_new_label();
>
> - gen_get_gpr(src1, a->rs1);
> tcg_gen_brcond_tl(TCG_COND_NE, load_res, src1, l1);
>
> - gen_get_gpr(src2, a->rs2);
> /*
> * Note that the TCG atomic primitives are SC,
> * so we can ignore AQ/RL along this path.
> */
> - tcg_gen_atomic_cmpxchg_tl(src1, load_res, load_val, src2,
> + tcg_gen_atomic_cmpxchg_tl(dest, load_res, load_val, src2,
> ctx->mem_idx, mop);
> - tcg_gen_setcond_tl(TCG_COND_NE, dat, src1, load_val);
> - gen_set_gpr(a->rd, dat);
> + tcg_gen_setcond_tl(TCG_COND_NE, dest, dest, load_val);
> tcg_gen_br(l2);
>
> gen_set_label(l1);
> @@ -65,8 +61,7 @@ static inline bool gen_sc(DisasContext *ctx, arg_atomic *a,
> MemOp mop)
> * provide the memory barrier implied by AQ/RL.
> */
> tcg_gen_mb(TCG_MO_ALL + a->aq * TCG_BAR_LDAQ + a->rl * TCG_BAR_STRL);
> - tcg_gen_movi_tl(dat, 1);
> - gen_set_gpr(a->rd, dat);
> + tcg_gen_movi_tl(dest, 1);
>
> gen_set_label(l2);
> /*
> @@ -75,9 +70,6 @@ static inline bool gen_sc(DisasContext *ctx, arg_atomic *a,
> MemOp mop)
> */
> tcg_gen_movi_tl(load_res, -1);
>
> - tcg_temp_free(dat);
> - tcg_temp_free(src1);
> - tcg_temp_free(src2);
> return true;
> }
>
> @@ -85,17 +77,11 @@ static bool gen_amo(DisasContext *ctx, arg_atomic *a,
> void(*func)(TCGv, TCGv, TCGv, TCGArg, MemOp),
> MemOp mop)
> {
> - TCGv src1 = tcg_temp_new();
> - TCGv src2 = tcg_temp_new();
> + TCGv dest = gpr_dst(ctx, a->rd);
> + TCGv src1 = gpr_src(ctx, a->rs1);
> + TCGv src2 = gpr_src(ctx, a->rs2);
>
> - gen_get_gpr(src1, a->rs1);
> - gen_get_gpr(src2, a->rs2);
> -
> - (*func)(src2, src1, src2, ctx->mem_idx, mop);
> -
> - gen_set_gpr(a->rd, src2);
> - tcg_temp_free(src1);
> - tcg_temp_free(src2);
> + (*func)(dest, src1, src2, ctx->mem_idx, mop);
> return true;
> }
>
> --
> 2.25.1
>
>
- Re: [PATCH 16/17] target/riscv: Use gpr_{src,dst} for RVV, (continued)
- [PATCH 14/17] target/riscv: Tidy trans_rvh.c.inc, Richard Henderson, 2021/07/09
- [PATCH 03/17] target/riscv: Use gpr_{src,dst} in shift operations, Richard Henderson, 2021/07/09
- [PATCH 04/17] target/riscv: Use gpr_{src, dst} in word division operations, Richard Henderson, 2021/07/09
- [PATCH 09/17] target/riscv: Reorg csr instructions, Richard Henderson, 2021/07/09
- [PATCH 10/17] target/riscv: Use gpr_{src,dst} for RVA, Richard Henderson, 2021/07/09
- Re: [PATCH 10/17] target/riscv: Use gpr_{src,dst} for RVA,
Alistair Francis <=
- [PATCH 08/17] target/riscv: Use gpr_{src, dst} for word shift operations, Richard Henderson, 2021/07/09
- [PATCH 15/17] target/riscv: Use gen_arith for mulh and mulhu, Richard Henderson, 2021/07/09
- [PATCH 13/17] target/riscv: Use gpr_{src,dst} for RVD, Richard Henderson, 2021/07/09
- Re: [PATCH 00/17] target/riscv: Use tcg_constant_*, LIU Zhiwei, 2021/07/15