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[PATCH v10 34/77] target/riscv: rvv-1.0: allow load element with sign-ex
From: |
frank . chang |
Subject: |
[PATCH v10 34/77] target/riscv: rvv-1.0: allow load element with sign-extended |
Date: |
Mon, 29 Nov 2021 11:02:54 +0800 |
From: Frank Chang <frank.chang@sifive.com>
For some vector instructions (e.g. vmv.s.x), the element is loaded with
sign-extended.
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
target/riscv/insn_trans/trans_rvv.c.inc | 32 +++++++++++++++++--------
1 file changed, 22 insertions(+), 10 deletions(-)
diff --git a/target/riscv/insn_trans/trans_rvv.c.inc
b/target/riscv/insn_trans/trans_rvv.c.inc
index 80cbf0cadb8..4207cc4e6b8 100644
--- a/target/riscv/insn_trans/trans_rvv.c.inc
+++ b/target/riscv/insn_trans/trans_rvv.c.inc
@@ -2825,17 +2825,29 @@ static bool trans_vid_v(DisasContext *s, arg_vid_v *a)
/* Integer Extract Instruction */
static void load_element(TCGv_i64 dest, TCGv_ptr base,
- int ofs, int sew)
+ int ofs, int sew, bool sign)
{
switch (sew) {
case MO_8:
- tcg_gen_ld8u_i64(dest, base, ofs);
+ if (!sign) {
+ tcg_gen_ld8u_i64(dest, base, ofs);
+ } else {
+ tcg_gen_ld8s_i64(dest, base, ofs);
+ }
break;
case MO_16:
- tcg_gen_ld16u_i64(dest, base, ofs);
+ if (!sign) {
+ tcg_gen_ld16u_i64(dest, base, ofs);
+ } else {
+ tcg_gen_ld16s_i64(dest, base, ofs);
+ }
break;
case MO_32:
- tcg_gen_ld32u_i64(dest, base, ofs);
+ if (!sign) {
+ tcg_gen_ld32u_i64(dest, base, ofs);
+ } else {
+ tcg_gen_ld32s_i64(dest, base, ofs);
+ }
break;
case MO_64:
tcg_gen_ld_i64(dest, base, ofs);
@@ -2890,7 +2902,7 @@ static void vec_element_loadx(DisasContext *s, TCGv_i64
dest,
/* Perform the load. */
load_element(dest, base,
- vreg_ofs(s, vreg), s->sew);
+ vreg_ofs(s, vreg), s->sew, false);
tcg_temp_free_ptr(base);
tcg_temp_free_i32(ofs);
@@ -2906,9 +2918,9 @@ static void vec_element_loadx(DisasContext *s, TCGv_i64
dest,
}
static void vec_element_loadi(DisasContext *s, TCGv_i64 dest,
- int vreg, int idx)
+ int vreg, int idx, bool sign)
{
- load_element(dest, cpu_env, endian_ofs(s, vreg, idx), s->sew);
+ load_element(dest, cpu_env, endian_ofs(s, vreg, idx), s->sew, sign);
}
static bool trans_vext_x_v(DisasContext *s, arg_r *a)
@@ -2918,7 +2930,7 @@ static bool trans_vext_x_v(DisasContext *s, arg_r *a)
if (a->rs1 == 0) {
/* Special case vmv.x.s rd, vs2. */
- vec_element_loadi(s, tmp, a->rs2, 0);
+ vec_element_loadi(s, tmp, a->rs2, 0, false);
} else {
/* This instruction ignores LMUL and vector register groups */
int vlmax = s->vlen >> (3 + s->sew);
@@ -3000,7 +3012,7 @@ static bool trans_vfmv_f_s(DisasContext *s, arg_vfmv_f_s
*a)
(s->mstatus_fs != 0) && (s->sew != 0)) {
unsigned int len = 8 << s->sew;
- vec_element_loadi(s, cpu_fpr[a->rd], a->rs2, 0);
+ vec_element_loadi(s, cpu_fpr[a->rd], a->rs2, 0, false);
if (len < 64) {
tcg_gen_ori_i64(cpu_fpr[a->rd], cpu_fpr[a->rd],
MAKE_64BIT_MASK(len, 64 - len));
@@ -3102,7 +3114,7 @@ static bool trans_vrgather_vx(DisasContext *s, arg_rmrr
*a)
TCGv_i64 dest = tcg_temp_new_i64();
if (a->rs1 == 0) {
- vec_element_loadi(s, dest, a->rs2, 0);
+ vec_element_loadi(s, dest, a->rs2, 0, false);
} else {
vec_element_loadx(s, dest, a->rs2, cpu_gpr[a->rs1], vlmax);
}
--
2.25.1
- [PATCH v10 72/77] target/riscv: rvv-1.0: add vsetivli instruction, (continued)
- [PATCH v10 72/77] target/riscv: rvv-1.0: add vsetivli instruction, frank . chang, 2021/11/28
- [PATCH v10 73/77] target/riscv: rvv-1.0: add evl parameter to vext_ldst_us(), frank . chang, 2021/11/28
- [PATCH v10 74/77] target/riscv: rvv-1.0: add vector unit-stride mask load/store insns, frank . chang, 2021/11/28
- [PATCH v10 75/77] target/riscv: rvv-1.0: rename vmandnot.mm and vmornot.mm to vmandn.mm and vmorn.mm, frank . chang, 2021/11/28
- [PATCH v10 76/77] target/riscv: rvv-1.0: update opivv_vadc_check() comment, frank . chang, 2021/11/28
- [PATCH v10 77/77] target/riscv: rvv-1.0: Add ELEN checks for widening and narrowing instructions, frank . chang, 2021/11/28
- [PATCH v10 15/77] target/riscv: rvv-1.0: update check functions, frank . chang, 2021/11/28
- [PATCH v10 12/77] target/riscv: rvv-1.0: remove MLEN calculations, frank . chang, 2021/11/28
- [PATCH v10 01/77] target/riscv: drop vector 0.7.1 and add 1.0 support, frank . chang, 2021/11/28
- [PATCH v10 02/77] target/riscv: Use FIELD_EX32() to extract wd field, frank . chang, 2021/11/28
- [PATCH v10 34/77] target/riscv: rvv-1.0: allow load element with sign-extended,
frank . chang <=
- [PATCH v10 44/77] target/riscv: rvv-1.0: narrowing integer right shift instructions, frank . chang, 2021/11/28
- [PATCH v10 46/77] target/riscv: rvv-1.0: single-width saturating add and subtract instructions, frank . chang, 2021/11/28