> From: Aleksandar Markovic <[email protected]>
> Sent: Monday, August 6, 2018 7:00 PM
> From: Stefan Markovic <[email protected]>
>
> Add emulation of DSP ASE instructions for nanoMIPS - part 4.
>
> Signed-off-by: Aleksandar Markovic <[email protected]>
> Signed-off-by: Stefan Markovic <[email protected]>
> ---
> target/mips/translate.c | 378
> ++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 378 insertions(+)
>
> diff --git a/target/mips/translate.c b/target/mips/translate.c
> index 8c33d14..9c8d1f4 100644
> --- a/target/mips/translate.c
> +++ b/target/mips/translate.c
> @@ -17202,6 +17202,380 @@ static void
> gen_pool32axf_1_nanomips_insn(DisasContext *ctx, uint32_t opc,
> tcg_temp_free(v0_t);
> }
>
> + case NM_MADDU:
> + {
> + int acc = extract32(ctx->opcode, 14, 2);
> +
> + TCGv_i64 t2 = tcg_temp_new_i64();
> + TCGv_i64 t3 = tcg_temp_new_i64();
> +
> + gen_load_gpr(t0, rs);
> + gen_load_gpr(t1, rt);
> +
> + check_dsp(ctx);
> + tcg_gen_ext32u_tl(t0, t0);
> + tcg_gen_ext32u_tl(t1, t1);
> + tcg_gen_extu_tl_i64(t2, t0);
> + tcg_gen_extu_tl_i64(t3, t1);
> + tcg_gen_mul_i64(t2, t2, t3);
> + tcg_gen_concat_tl_i64(t3, cpu_LO[acc], cpu_HI[acc]);
> + tcg_gen_add_i64(t2, t2, t3);
> + tcg_temp_free_i64(t3);
> + gen_move_low32(cpu_LO[acc], t2);
> + gen_move_high32(cpu_HI[acc], t2);
> + tcg_temp_free_i64(t2);
> + }
> + break;
check_dsp() should be as early as possible in this and other similar code
segments.
> + case NM_MULTU:
> + {
> + int acc = extract32(ctx->opcode, 14, 2);
> +
> + TCGv_i32 t2 = tcg_temp_new_i32();
> + TCGv_i32 t3 = tcg_temp_new_i32();
> +
> + gen_load_gpr(t0, rs);
> + gen_load_gpr(t1, rt);
> +
> + check_dsp(ctx);
> + tcg_gen_trunc_tl_i32(t2, t0);
> + tcg_gen_trunc_tl_i32(t3, t1);
> + tcg_gen_mulu2_i32(t2, t3, t2, t3);
> + tcg_gen_ext_i32_tl(cpu_LO[acc], t2);
> + tcg_gen_ext_i32_tl(cpu_HI[acc], t3);
> + tcg_temp_free_i32(t2);
> + tcg_temp_free_i32(t3);
> + }
> + break;
Same.
> + case NM_MSUB:
> + {
> + int acc = extract32(ctx->opcode, 14, 2);
> +
> + TCGv_i64 t2 = tcg_temp_new_i64();
> + TCGv_i64 t3 = tcg_temp_new_i64();
> +
> + gen_load_gpr(t0, rs);
> + gen_load_gpr(t1, rt);
> +
> + check_dsp(ctx);
> + tcg_gen_ext_tl_i64(t2, t0);
> + tcg_gen_ext_tl_i64(t3, t1);
> + tcg_gen_mul_i64(t2, t2, t3);
> + tcg_gen_concat_tl_i64(t3, cpu_LO[acc], cpu_HI[acc]);
> + tcg_gen_sub_i64(t2, t3, t2);
> + tcg_temp_free_i64(t3);
> + gen_move_low32(cpu_LO[acc], t2);
> + gen_move_high32(cpu_HI[acc], t2);
> + tcg_temp_free_i64(t2);
> + }
> + break;
Same.
> + case NM_MSUBU:
> + {
> + int acc = extract32(ctx->opcode, 14, 2);
> +
> + TCGv_i64 t2 = tcg_temp_new_i64();
> + TCGv_i64 t3 = tcg_temp_new_i64();
> +
> + gen_load_gpr(t0, rs);
> + gen_load_gpr(t1, rt);
> +
> + check_dsp(ctx);
> + tcg_gen_ext32u_tl(t0, t0);
> + tcg_gen_ext32u_tl(t1, t1);
> + tcg_gen_extu_tl_i64(t2, t0);
> + tcg_gen_extu_tl_i64(t3, t1);
> + tcg_gen_mul_i64(t2, t2, t3);
> + tcg_gen_concat_tl_i64(t3, cpu_LO[acc], cpu_HI[acc]);
> + tcg_gen_sub_i64(t2, t3, t2);
> + tcg_temp_free_i64(t3);
> + gen_move_low32(cpu_LO[acc], t2);
> + gen_move_high32(cpu_HI[acc], t2);
> + tcg_temp_free_i64(t2);
> + }
> + break;
Same.
