From: LIU Zhiwei <zhiwei_...@c-sky.com> Signed-off-by: LIU Zhiwei <zhiwei_...@c-sky.com> Reviewed-by: Richard Henderson <richard.hender...@linaro.org> Message-id: 20200623215920.2594-56-zhiwei_...@c-sky.com Signed-off-by: Alistair Francis <alistair.fran...@wdc.com> --- target/riscv/insn32.decode | 1 + target/riscv/insn_trans/trans_rvv.inc.c | 116 ++++++++++++++++++++++++ 2 files changed, 117 insertions(+)
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode index 6f2e2df7d3..c4496cd010 100644 --- a/target/riscv/insn32.decode +++ b/target/riscv/insn32.decode @@ -563,6 +563,7 @@ vmsif_m 010110 . ..... 00011 010 ..... 1010111 @r2_vm vmsof_m 010110 . ..... 00010 010 ..... 1010111 @r2_vm viota_m 010110 . ..... 10000 010 ..... 1010111 @r2_vm vid_v 010110 . 00000 10001 010 ..... 1010111 @r1_vm +vext_x_v 001100 1 ..... ..... 010 ..... 1010111 @r vsetvli 0 ........... ..... 111 ..... 1010111 @r2_zimm vsetvl 1000000 ..... ..... 111 ..... 1010111 @r diff --git a/target/riscv/insn_trans/trans_rvv.inc.c b/target/riscv/insn_trans/trans_rvv.inc.c index e94d149d3b..cfbbd88dbf 100644 --- a/target/riscv/insn_trans/trans_rvv.inc.c +++ b/target/riscv/insn_trans/trans_rvv.inc.c @@ -2533,3 +2533,119 @@ static bool trans_vid_v(DisasContext *s, arg_vid_v *a) } return false; } + +/* + *** Vector Permutation Instructions + */ + +/* Integer Extract Instruction */ + +static void load_element(TCGv_i64 dest, TCGv_ptr base, + int ofs, int sew) +{ + switch (sew) { + case MO_8: + tcg_gen_ld8u_i64(dest, base, ofs); + break; + case MO_16: + tcg_gen_ld16u_i64(dest, base, ofs); + break; + case MO_32: + tcg_gen_ld32u_i64(dest, base, ofs); + break; + case MO_64: + tcg_gen_ld_i64(dest, base, ofs); + break; + default: + g_assert_not_reached(); + break; + } +} + +/* offset of the idx element with base regsiter r */ +static uint32_t endian_ofs(DisasContext *s, int r, int idx) +{ +#ifdef HOST_WORDS_BIGENDIAN + return vreg_ofs(s, r) + ((idx ^ (7 >> s->sew)) << s->sew); +#else + return vreg_ofs(s, r) + (idx << s->sew); +#endif +} + +/* adjust the index according to the endian */ +static void endian_adjust(TCGv_i32 ofs, int sew) +{ +#ifdef HOST_WORDS_BIGENDIAN + tcg_gen_xori_i32(ofs, ofs, 7 >> sew); +#endif +} + +/* Load idx >= VLMAX ? 0 : vreg[idx] */ +static void vec_element_loadx(DisasContext *s, TCGv_i64 dest, + int vreg, TCGv idx, int vlmax) +{ + TCGv_i32 ofs = tcg_temp_new_i32(); + TCGv_ptr base = tcg_temp_new_ptr(); + TCGv_i64 t_idx = tcg_temp_new_i64(); + TCGv_i64 t_vlmax, t_zero; + + /* + * Mask the index to the length so that we do + * not produce an out-of-range load. + */ + tcg_gen_trunc_tl_i32(ofs, idx); + tcg_gen_andi_i32(ofs, ofs, vlmax - 1); + + /* Convert the index to an offset. */ + endian_adjust(ofs, s->sew); + tcg_gen_shli_i32(ofs, ofs, s->sew); + + /* Convert the index to a pointer. */ + tcg_gen_ext_i32_ptr(base, ofs); + tcg_gen_add_ptr(base, base, cpu_env); + + /* Perform the load. */ + load_element(dest, base, + vreg_ofs(s, vreg), s->sew); + tcg_temp_free_ptr(base); + tcg_temp_free_i32(ofs); + + /* Flush out-of-range indexing to zero. */ + t_vlmax = tcg_const_i64(vlmax); + t_zero = tcg_const_i64(0); + tcg_gen_extu_tl_i64(t_idx, idx); + + tcg_gen_movcond_i64(TCG_COND_LTU, dest, t_idx, + t_vlmax, dest, t_zero); + + tcg_temp_free_i64(t_vlmax); + tcg_temp_free_i64(t_zero); + tcg_temp_free_i64(t_idx); +} + +static void vec_element_loadi(DisasContext *s, TCGv_i64 dest, + int vreg, int idx) +{ + load_element(dest, cpu_env, endian_ofs(s, vreg, idx), s->sew); +} + +static bool trans_vext_x_v(DisasContext *s, arg_r *a) +{ + TCGv_i64 tmp = tcg_temp_new_i64(); + TCGv dest = tcg_temp_new(); + + if (a->rs1 == 0) { + /* Special case vmv.x.s rd, vs2. */ + vec_element_loadi(s, tmp, a->rs2, 0); + } else { + /* This instruction ignores LMUL and vector register groups */ + int vlmax = s->vlen >> (3 + s->sew); + vec_element_loadx(s, tmp, a->rs2, cpu_gpr[a->rs1], vlmax); + } + tcg_gen_trunc_i64_tl(dest, tmp); + gen_set_gpr(a->rd, dest); + + tcg_temp_free(dest); + tcg_temp_free_i64(tmp); + return true; +} -- 2.27.0