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target/riscv: vector register gather instruction

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Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200701152549.1218-60-zhiwei_liu@c-sky.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
LIU Zhiwei 2020-07-01 23:25:47 +08:00 • committed by Alistair Francis
parent ec17e03688
commit e4b83d5c09
4 changed files with 150 additions and 0 deletions
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78
target/riscv/insn_trans/trans_rvv.inc.c
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@ -2776,3 +2776,81 @@ GEN_OPIVI_TRANS(vslideup_vi, 1, vslideup_vx, slideup_check)
GEN_OPIVX_TRANS(vslidedown_vx, opivx_check)
GEN_OPIVX_TRANS(vslide1down_vx, opivx_check)
GEN_OPIVI_TRANS(vslidedown_vi, 1, vslidedown_vx, opivx_check)
/* Vector Register Gather Instruction */
static bool vrgather_vv_check(DisasContext *s, arg_rmrr *a)
{
return (vext_check_isa_ill(s) &&
vext_check_overlap_mask(s, a->rd, a->vm, true) &&
vext_check_reg(s, a->rd, false) &&
vext_check_reg(s, a->rs1, false) &&
vext_check_reg(s, a->rs2, false) &&
(a->rd != a->rs2) && (a->rd != a->rs1));
}
GEN_OPIVV_TRANS(vrgather_vv, vrgather_vv_check)
static bool vrgather_vx_check(DisasContext *s, arg_rmrr *a)
{
return (vext_check_isa_ill(s) &&
vext_check_overlap_mask(s, a->rd, a->vm, true) &&
vext_check_reg(s, a->rd, false) &&
vext_check_reg(s, a->rs2, false) &&
(a->rd != a->rs2));
}
/* vrgather.vx vd, vs2, rs1, vm # vd[i] = (x[rs1] >= VLMAX) ? 0 : vs2[rs1] */
static bool trans_vrgather_vx(DisasContext *s, arg_rmrr *a)
{
if (!vrgather_vx_check(s, a)) {
return false;
}
if (a->vm && s->vl_eq_vlmax) {
int vlmax = s->vlen / s->mlen;
TCGv_i64 dest = tcg_temp_new_i64();
if (a->rs1 == 0) {
vec_element_loadi(s, dest, a->rs2, 0);
} else {
vec_element_loadx(s, dest, a->rs2, cpu_gpr[a->rs1], vlmax);
}
tcg_gen_gvec_dup_i64(s->sew, vreg_ofs(s, a->rd),
MAXSZ(s), MAXSZ(s), dest);
tcg_temp_free_i64(dest);
} else {
static gen_helper_opivx * const fns[4] = {
gen_helper_vrgather_vx_b, gen_helper_vrgather_vx_h,
gen_helper_vrgather_vx_w, gen_helper_vrgather_vx_d
};
return opivx_trans(a->rd, a->rs1, a->rs2, a->vm, fns[s->sew], s);
}
return true;
}
/* vrgather.vi vd, vs2, imm, vm # vd[i] = (imm >= VLMAX) ? 0 : vs2[imm] */
static bool trans_vrgather_vi(DisasContext *s, arg_rmrr *a)
{
if (!vrgather_vx_check(s, a)) {
return false;
}
if (a->vm && s->vl_eq_vlmax) {
if (a->rs1 >= s->vlen / s->mlen) {
tcg_gen_gvec_dup_imm(SEW64, vreg_ofs(s, a->rd),
MAXSZ(s), MAXSZ(s), 0);
} else {
tcg_gen_gvec_dup_mem(s->sew, vreg_ofs(s, a->rd),
endian_ofs(s, a->rs2, a->rs1),
MAXSZ(s), MAXSZ(s));
}
} else {
static gen_helper_opivx * const fns[4] = {
gen_helper_vrgather_vx_b, gen_helper_vrgather_vx_h,
gen_helper_vrgather_vx_w, gen_helper_vrgather_vx_d
};
return opivi_trans(a->rd, a->rs1, a->rs2, a->vm, fns[s->sew], s, 1);
}
return true;
}