[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH v7 3/9] target/riscv: remove 'over' brconds from vector trans
|
From: |
Alistair Francis |
|
Subject: |
Re: [PATCH v7 3/9] target/riscv: remove 'over' brconds from vector trans |
|
Date: |
Fri, 8 Mar 2024 21:13:51 +1000 |
On Fri, Mar 8, 2024 at 8:40 PM Daniel Henrique Barboza
<dbarboza@ventanamicro.com> wrote:
>
>
>
> On 3/8/24 00:34, LIU Zhiwei wrote:
> > Hi Daniel and Alistair,
> >
> > Hope it is not too late. I think there are two bugs in this patch.
> >
> > 1) The first is for instruction vfmv.s.f. vfmv.s.f doesn't use helper
> > function. If we remove the over check, it will set the first element of
> > destination vector register, which is against the specification. According
> > to the riscv-v-specification, 16.2. Floating-Point Scalar Move Instructions,
> >
> > "If vstart ≥ vl, no operation is performed and the destination register is
> > not updated".
>
> vfmv.s.f seems to have biggers problems: it's not setting env->vstart at any
> point. In fact, in a quick look, there's a handful of cases where this is
> happening:
> trans_vmv_x_s, trans_vmv_s_x, trans_vfmv_f_s and trans_vfmv_s_f.
>
> I'll need an extra patch to fix them. We'll probably need to keep the
> cpu_vstart
> and cpu_vl globals, and use brconds, to be able to handle the vstart >= vl
> scenario that happens with them (since they don't use helpers).
>
> >
> > 2) The second is for vector instruction with helper functions. we should
> > not change any elements including the tail elements when vstart >=vl. But
> > this patch break this behavior. According to the riscv-v-specification,
> > 5.4. Prestart, Active, Inactive, Body, and Tail Element Denitions,
> >
> > "When vstart ≥ vl, there are no body elements, and no elements are updated
> > in any destination vector register group,
> > including that no tail elements are updated with agnostic values."
>
> Every helper in vector_helper.c has a pattern like:
>
> (--- set variables ---)
>
> for (i = env->vstart; i < vl; i++) {
> /* do things */
> }
> env->vstart = 0;
> vext_set_elems_1s() /*set tail */
>
>
> When vstart >= vl there is no body elements and no tail, but I'm not sure
> about
> vext_set_elems_1s() being able to handle that. In particular because we're
> setting
> vstart=0 before calling it.
>
> I'll add an additional patch to only call vext_set_elems_1s() to set the tail
> if
> start < vl.
I dropped this and later patches from my latest PR (which is sending
now). I was trying to get it ready today so when I saw the concern I
dropped it to be safe.
It's Friday night here, so I'll have a look at this next week. Should
still be able to get it in for 9.0
Alistair
>
> All this work with these changes is to put the 'vstart' management in a
> single place,
> i.e. the helper (when available). Then the translations can freely set
> vstart_eq_zero in the end (i.e. no exceptions/faults) knowing that the
> execution
> code zeroed vstart. It's clearer than having the helper make assumptions (i.e.
> vstart < vl) that were made during the translation. If the helper is setting
> vstart = 0 the helper must also deal with any invalid value of vstart
> accordingly.
>
>
> Thanks,
>
>
> Daniel
>
>
> >
> > I will review this patch set in more details later.
> >
> > Thanks,
> > Zhiwei
> >
> > On 2024/3/7 1:19, Daniel Henrique Barboza wrote:
> >> Most of the vector translations has this following pattern at the start:
> >>
> >> TCGLabel *over = gen_new_label();
> >> tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> And then right at the end:
> >>
> >> gen_set_label(over);
> >> return true;
> >>
> >> This means that if vstart >= vl we'll not set vstart = 0 at the end of
> >> the insns - this is done inside the helper that is being skipped. The
> >> reason why this pattern hasn't been a bigger problem is because the
> >> conditional vstart >= vl is very rare.
> >>
> >> Checking all the helpers in vector_helper.c we see all of them with a
> >> pattern like this:
> >>
> >> for (i = env->vstart; i < vl; i++) {
> >> (...)
> >> }
> >> env->vstart = 0;
> >>
> >> Thus they can handle vstart >= vl case gracefully, with the benefit of
> >> setting env->vstart = 0 during the process.
> >>
> >> Remove all 'over' conditionals and let the helper set env->vstart = 0
> >> every time.
> >>
> >> While we're at it, remove the (vl == 0) brconds from trans_rvbf16.c.inc
> >> too since they're unneeded.
> >>
> >> Suggested-by: Richard Henderson<richard.henderson@linaro.org>
> >> Signed-off-by: Daniel Henrique Barboza<dbarboza@ventanamicro.com>
> >> Reviewed-by: Richard Henderson<richard.henderson@linaro.org>
> >> Reviewed-by: Alistair Francis<alistair.francis@wdc.com>
> >> ---
> >> target/riscv/insn_trans/trans_rvbf16.c.inc | 12 ---
> >> target/riscv/insn_trans/trans_rvv.c.inc | 117 ---------------------
> >> target/riscv/insn_trans/trans_rvvk.c.inc | 18 ----
> >> 3 files changed, 147 deletions(-)
> >>
> >> diff --git a/target/riscv/insn_trans/trans_rvbf16.c.inc
> >> b/target/riscv/insn_trans/trans_rvbf16.c.inc
> >> index 8ee99df3f3..a842e76a6b 100644
> >> --- a/target/riscv/insn_trans/trans_rvbf16.c.inc
> >> +++ b/target/riscv/insn_trans/trans_rvbf16.c.inc
> >> @@ -71,11 +71,8 @@ static bool trans_vfncvtbf16_f_f_w(DisasContext *ctx,
> >> arg_vfncvtbf16_f_f_w *a)
> >>
> >> if (opfv_narrow_check(ctx, a) && (ctx->sew == MO_16)) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >>
> >> gen_set_rm_chkfrm(ctx, RISCV_FRM_DYN);
> >> - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> data = FIELD_DP32(data, VDATA, LMUL, ctx->lmul);
> >> @@ -87,7 +84,6 @@ static bool trans_vfncvtbf16_f_f_w(DisasContext *ctx,
> >> arg_vfncvtbf16_f_f_w *a)
> >> ctx->cfg_ptr->vlenb, data,
> >> gen_helper_vfncvtbf16_f_f_w);
> >> mark_vs_dirty(ctx);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -100,11 +96,8 @@ static bool trans_vfwcvtbf16_f_f_v(DisasContext *ctx,
> >> arg_vfwcvtbf16_f_f_v *a)
> >>
> >> if (opfv_widen_check(ctx, a) && (ctx->sew == MO_16)) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >>
> >> gen_set_rm_chkfrm(ctx, RISCV_FRM_DYN);
> >> - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> data = FIELD_DP32(data, VDATA, LMUL, ctx->lmul);
> >> @@ -116,7 +109,6 @@ static bool trans_vfwcvtbf16_f_f_v(DisasContext *ctx,
> >> arg_vfwcvtbf16_f_f_v *a)
> >> ctx->cfg_ptr->vlenb, data,
> >> gen_helper_vfwcvtbf16_f_f_v);
> >> mark_vs_dirty(ctx);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -130,11 +122,8 @@ static bool trans_vfwmaccbf16_vv(DisasContext *ctx,
> >> arg_vfwmaccbf16_vv *a)
> >> if (require_rvv(ctx) && vext_check_isa_ill(ctx) && (ctx->sew ==
> >> MO_16) &&
> >> vext_check_dss(ctx, a->rd, a->rs1, a->rs2, a->vm)) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >>
> >> gen_set_rm_chkfrm(ctx, RISCV_FRM_DYN);
> >> - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> data = FIELD_DP32(data, VDATA, LMUL, ctx->lmul);
> >> @@ -147,7 +136,6 @@ static bool trans_vfwmaccbf16_vv(DisasContext *ctx,
> >> arg_vfwmaccbf16_vv *a)
> >> ctx->cfg_ptr->vlenb, data,
> >> gen_helper_vfwmaccbf16_vv);
> >> mark_vs_dirty(ctx);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> diff --git a/target/riscv/insn_trans/trans_rvv.c.inc
> >> b/target/riscv/insn_trans/trans_rvv.c.inc
> >> index e42728990e..0114a132b3 100644
> >> --- a/target/riscv/insn_trans/trans_rvv.c.inc
> >> +++ b/target/riscv/insn_trans/trans_rvv.c.inc
> >> @@ -616,9 +616,6 @@ static bool ldst_us_trans(uint32_t vd, uint32_t rs1,
> >> uint32_t data,
> >> TCGv base;
> >> TCGv_i32 desc;
> >>
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> -
> >> dest = tcg_temp_new_ptr();
> >> mask = tcg_temp_new_ptr();
> >> base = get_gpr(s, rs1, EXT_NONE);
> >> @@ -660,7 +657,6 @@ static bool ldst_us_trans(uint32_t vd, uint32_t rs1,
> >> uint32_t data,
> >> tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
> >> }
> >>
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> @@ -802,9 +798,6 @@ static bool ldst_stride_trans(uint32_t vd, uint32_t
> >> rs1, uint32_t rs2,
> >> TCGv base, stride;
> >> TCGv_i32 desc;
> >>
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> -
> >> dest = tcg_temp_new_ptr();
> >> mask = tcg_temp_new_ptr();
> >> base = get_gpr(s, rs1, EXT_NONE);
> >> @@ -819,7 +812,6 @@ static bool ldst_stride_trans(uint32_t vd, uint32_t
> >> rs1, uint32_t rs2,
> >>
> >> fn(dest, mask, base, stride, tcg_env, desc);
> >>
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> @@ -906,9 +898,6 @@ static bool ldst_index_trans(uint32_t vd, uint32_t
> >> rs1, uint32_t vs2,
> >> TCGv base;
> >> TCGv_i32 desc;
> >>
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> -
> >> dest = tcg_temp_new_ptr();
> >> mask = tcg_temp_new_ptr();
> >> index = tcg_temp_new_ptr();
> >> @@ -924,7 +913,6 @@ static bool ldst_index_trans(uint32_t vd, uint32_t
> >> rs1, uint32_t vs2,
> >>
> >> fn(dest, mask, base, index, tcg_env, desc);
> >>
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> @@ -1044,9 +1032,6 @@ static bool ldff_trans(uint32_t vd, uint32_t rs1,
> >> uint32_t data,
> >> TCGv base;
> >> TCGv_i32 desc;
> >>
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> -
> >> dest = tcg_temp_new_ptr();
> >> mask = tcg_temp_new_ptr();
> >> base = get_gpr(s, rs1, EXT_NONE);
> >> @@ -1059,7 +1044,6 @@ static bool ldff_trans(uint32_t vd, uint32_t rs1,
> >> uint32_t data,
> >> fn(dest, mask, base, tcg_env, desc);
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> @@ -1100,10 +1084,6 @@ static bool ldst_whole_trans(uint32_t vd, uint32_t
> >> rs1, uint32_t nf,
> >> uint32_t width, gen_helper_ldst_whole *fn,
> >> DisasContext *s)
> >> {
> >> - uint32_t evl = s->cfg_ptr->vlenb * nf / width;
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcondi_tl(TCG_COND_GEU, cpu_vstart, evl, over);
> >> -
> >> TCGv_ptr dest;
> >> TCGv base;
> >> TCGv_i32 desc;
> >> @@ -1120,8 +1100,6 @@ static bool ldst_whole_trans(uint32_t vd, uint32_t
> >> rs1, uint32_t nf,
> >>
> >> fn(dest, base, tcg_env, desc);
> >>
> >> - gen_set_label(over);
> >> -
> >> return true;
> >> }
> >>
> >> @@ -1195,10 +1173,6 @@ static inline bool
> >> do_opivv_gvec(DisasContext *s, arg_rmrr *a, GVecGen3Fn *gvec_fn,
> >> gen_helper_gvec_4_ptr *fn)
> >> {
> >> - TCGLabel *over = gen_new_label();
> >> -
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> -
> >> if (a->vm && s->vl_eq_vlmax && !(s->vta && s->lmul < 0)) {
> >> gvec_fn(s->sew, vreg_ofs(s, a->rd),
> >> vreg_ofs(s, a->rs2), vreg_ofs(s, a->rs1),
> >> @@ -1216,7 +1190,6 @@ do_opivv_gvec(DisasContext *s, arg_rmrr *a,
> >> GVecGen3Fn *gvec_fn,
> >> s->cfg_ptr->vlenb, data, fn);
> >> }
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> @@ -1248,9 +1221,6 @@ static bool opivx_trans(uint32_t vd, uint32_t rs1,
> >> uint32_t vs2, uint32_t vm,
> >> TCGv_i32 desc;
> >> uint32_t data = 0;
> >>
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> -
> >> dest = tcg_temp_new_ptr();
> >> mask = tcg_temp_new_ptr();
> >> src2 = tcg_temp_new_ptr();
> >> @@ -1271,7 +1241,6 @@ static bool opivx_trans(uint32_t vd, uint32_t rs1,
> >> uint32_t vs2, uint32_t vm,
> >> fn(dest, mask, src1, src2, tcg_env, desc);
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> @@ -1410,9 +1379,6 @@ static bool opivi_trans(uint32_t vd, uint32_t imm,
> >> uint32_t vs2, uint32_t vm,
> >> TCGv_i32 desc;
> >> uint32_t data = 0;
> >>
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> -
> >> dest = tcg_temp_new_ptr();
> >> mask = tcg_temp_new_ptr();
> >> src2 = tcg_temp_new_ptr();
> >> @@ -1433,7 +1399,6 @@ static bool opivi_trans(uint32_t vd, uint32_t imm,
> >> uint32_t vs2, uint32_t vm,
> >> fn(dest, mask, src1, src2, tcg_env, desc);
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> @@ -1495,8 +1460,6 @@ static bool do_opivv_widen(DisasContext *s, arg_rmrr
> >> *a,
> >> {
> >> if (checkfn(s, a)) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
> >> @@ -1509,7 +1472,6 @@ static bool do_opivv_widen(DisasContext *s, arg_rmrr
> >> *a,
> >> s->cfg_ptr->vlenb,
> >> data, fn);
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -1571,8 +1533,6 @@ static bool do_opiwv_widen(DisasContext *s, arg_rmrr
> >> *a,
> >> {
> >> if (opiwv_widen_check(s, a)) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
> >> @@ -1584,7 +1544,6 @@ static bool do_opiwv_widen(DisasContext *s, arg_rmrr
> >> *a,
> >> tcg_env, s->cfg_ptr->vlenb,
> >> s->cfg_ptr->vlenb, data, fn);
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -1643,8 +1602,6 @@ static bool opivv_trans(uint32_t vd, uint32_t vs1,
> >> uint32_t vs2, uint32_t vm,
> >> gen_helper_gvec_4_ptr *fn, DisasContext *s)
> >> {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> data = FIELD_DP32(data, VDATA, VM, vm);
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
> >> @@ -1655,7 +1612,6 @@ static bool opivv_trans(uint32_t vd, uint32_t vs1,
> >> uint32_t vs2, uint32_t vm,
> >> vreg_ofs(s, vs2), tcg_env, s->cfg_ptr->vlenb,
> >> s->cfg_ptr->vlenb, data, fn);
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> @@ -1834,8 +1790,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr
> >> *a) \
> >> gen_helper_##NAME##_h, \
> >> gen_helper_##NAME##_w, \
> >> }; \
> >> - TCGLabel *over = gen_new_label(); \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm); \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> @@ -1848,7 +1802,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr
> >> *a) \
> >> s->cfg_ptr->vlenb, data, \
> >> fns[s->sew]); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -2045,14 +1998,11 @@ static bool trans_vmv_v_v(DisasContext *s,
> >> arg_vmv_v_v *a)
> >> gen_helper_vmv_v_v_b, gen_helper_vmv_v_v_h,
> >> gen_helper_vmv_v_v_w, gen_helper_vmv_v_v_d,
> >> };
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> tcg_gen_gvec_2_ptr(vreg_ofs(s, a->rd), vreg_ofs(s, a->rs1),
> >> tcg_env, s->cfg_ptr->vlenb,
> >> s->cfg_ptr->vlenb, data,
> >> fns[s->sew]);
> >> - gen_set_label(over);
> >> }
> >> mark_vs_dirty(s);
> >> return true;
> >> @@ -2068,8 +2018,6 @@ static bool trans_vmv_v_x(DisasContext *s,
> >> arg_vmv_v_x *a)
> >> /* vmv.v.x has rs2 = 0 and vm = 1 */
> >> vext_check_ss(s, a->rd, 0, 1)) {
> >> TCGv s1;
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> s1 = get_gpr(s, a->rs1, EXT_SIGN);
> >>
> >> @@ -2102,7 +2050,6 @@ static bool trans_vmv_v_x(DisasContext *s,
> >> arg_vmv_v_x *a)
> >> }
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -2129,8 +2076,6 @@ static bool trans_vmv_v_i(DisasContext *s,
> >> arg_vmv_v_i *a)
> >> gen_helper_vmv_v_x_b, gen_helper_vmv_v_x_h,
> >> gen_helper_vmv_v_x_w, gen_helper_vmv_v_x_d,
> >> };
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> s1 = tcg_constant_i64(simm);
> >> dest = tcg_temp_new_ptr();
> >> @@ -2140,7 +2085,6 @@ static bool trans_vmv_v_i(DisasContext *s,
> >> arg_vmv_v_i *a)
> >> fns[s->sew](dest, s1, tcg_env, desc);
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> }
> >> return true;
> >> }
> >> @@ -2275,9 +2219,7 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr
> >> *a) \
> >> gen_helper_##NAME##_w, \
> >> gen_helper_##NAME##_d, \
> >> }; \
> >> - TCGLabel *over = gen_new_label(); \
> >> gen_set_rm(s, RISCV_FRM_DYN); \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm); \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> @@ -2292,7 +2234,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr
> >> *a) \
> >> s->cfg_ptr->vlenb, data, \
> >> fns[s->sew - 1]); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -2310,9 +2251,6 @@ static bool opfvf_trans(uint32_t vd, uint32_t rs1,
> >> uint32_t vs2,
> >> TCGv_i32 desc;
> >> TCGv_i64 t1;
> >>
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> -
> >> dest = tcg_temp_new_ptr();
> >> mask = tcg_temp_new_ptr();
> >> src2 = tcg_temp_new_ptr();
> >> @@ -2330,7 +2268,6 @@ static bool opfvf_trans(uint32_t vd, uint32_t rs1,
> >> uint32_t vs2,
> >> fn(dest, mask, t1, src2, tcg_env, desc);
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> @@ -2393,9 +2330,7 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr
> >> *a) \
> >> static gen_helper_gvec_4_ptr * const fns[2] = { \
> >> gen_helper_##NAME##_h, gen_helper_##NAME##_w, \
> >> }; \
> >> - TCGLabel *over = gen_new_label(); \
> >> gen_set_rm(s, RISCV_FRM_DYN); \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);\
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm); \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> @@ -2408,7 +2343,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr
> >> *a) \
> >> s->cfg_ptr->vlenb, data, \
> >> fns[s->sew - 1]); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -2467,9 +2401,7 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr
> >> *a) \
> >> static gen_helper_gvec_4_ptr * const fns[2] = { \
> >> gen_helper_##NAME##_h, gen_helper_##NAME##_w, \
> >> }; \
> >> - TCGLabel *over = gen_new_label(); \
> >> gen_set_rm(s, RISCV_FRM_DYN); \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm); \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> @@ -2482,7 +2414,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr
> >> *a) \
> >> s->cfg_ptr->vlenb, data, \
> >> fns[s->sew - 1]); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -2584,9 +2515,7 @@ static bool do_opfv(DisasContext *s, arg_rmr *a,
> >> {
> >> if (checkfn(s, a)) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >> gen_set_rm_chkfrm(s, rm);
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
> >> @@ -2597,7 +2526,6 @@ static bool do_opfv(DisasContext *s, arg_rmr *a,
> >> s->cfg_ptr->vlenb,
> >> s->cfg_ptr->vlenb, data, fn);
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -2696,8 +2624,6 @@ static bool trans_vfmv_v_f(DisasContext *s,
> >> arg_vfmv_v_f *a)
> >> gen_helper_vmv_v_x_w,
> >> gen_helper_vmv_v_x_d,
> >> };
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> t1 = tcg_temp_new_i64();
> >> /* NaN-box f[rs1] */
> >> @@ -2711,7 +2637,6 @@ static bool trans_vfmv_v_f(DisasContext *s,
> >> arg_vfmv_v_f *a)
> >> fns[s->sew - 1](dest, t1, tcg_env, desc);
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> }
> >> return true;
> >> }
> >> @@ -2773,9 +2698,7 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> gen_helper_##HELPER##_h, \
> >> gen_helper_##HELPER##_w, \
> >> }; \
> >> - TCGLabel *over = gen_new_label(); \
> >> gen_set_rm_chkfrm(s, FRM); \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm); \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> @@ -2787,7 +2710,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> s->cfg_ptr->vlenb, data, \
> >> fns[s->sew - 1]); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -2824,9 +2746,7 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> gen_helper_##NAME##_h, \
> >> gen_helper_##NAME##_w, \
> >> }; \
> >> - TCGLabel *over = gen_new_label(); \
> >> gen_set_rm(s, RISCV_FRM_DYN); \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm); \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> @@ -2838,7 +2758,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> s->cfg_ptr->vlenb, data, \
> >> fns[s->sew]); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -2891,9 +2810,7 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> gen_helper_##HELPER##_h, \
> >> gen_helper_##HELPER##_w, \
> >> }; \
> >> - TCGLabel *over = gen_new_label(); \
> >> gen_set_rm_chkfrm(s, FRM); \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm); \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> @@ -2905,7 +2822,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> s->cfg_ptr->vlenb, data, \
> >> fns[s->sew - 1]); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -2940,9 +2856,7 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> gen_helper_##HELPER##_h, \
> >> gen_helper_##HELPER##_w, \
> >> }; \
> >> - TCGLabel *over = gen_new_label(); \
> >> gen_set_rm_chkfrm(s, FRM); \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm); \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> @@ -2954,7 +2868,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> s->cfg_ptr->vlenb, data, \
> >> fns[s->sew]); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -3031,8 +2944,6 @@ static bool trans_##NAME(DisasContext *s, arg_r *a)
> >> \
> >> vext_check_isa_ill(s)) { \
> >> uint32_t data = 0; \
> >> gen_helper_gvec_4_ptr *fn = gen_helper_##NAME; \
> >> - TCGLabel *over = gen_new_label(); \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \
> >> \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> data = \
> >> @@ -3043,7 +2954,6 @@ static bool trans_##NAME(DisasContext *s, arg_r *a)
> >> \
> >> s->cfg_ptr->vlenb, \
> >> s->cfg_ptr->vlenb, data, fn); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -3131,8 +3041,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> s->vstart_eq_zero) { \
> >> uint32_t data = 0; \
> >> gen_helper_gvec_3_ptr *fn = gen_helper_##NAME; \
> >> - TCGLabel *over = gen_new_label(); \
> >> - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm); \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
> >> @@ -3145,7 +3053,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr
> >> *a) \
> >> s->cfg_ptr->vlenb, \
> >> data, fn); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> return true; \
> >> } \
> >> return false; \
> >> @@ -3171,8 +3078,6 @@ static bool trans_viota_m(DisasContext *s,
> >> arg_viota_m *a)
> >> require_align(a->rd, s->lmul) &&
> >> s->vstart_eq_zero) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
> >> @@ -3187,7 +3092,6 @@ static bool trans_viota_m(DisasContext *s,
> >> arg_viota_m *a)
> >> s->cfg_ptr->vlenb,
> >> s->cfg_ptr->vlenb, data, fns[s->sew]);
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -3201,8 +3105,6 @@ static bool trans_vid_v(DisasContext *s, arg_vid_v
> >> *a)
> >> require_align(a->rd, s->lmul) &&
> >> require_vm(a->vm, a->rd)) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
> >> @@ -3217,7 +3119,6 @@ static bool trans_vid_v(DisasContext *s, arg_vid_v
> >> *a)
> >> s->cfg_ptr->vlenb,
> >> data, fns[s->sew]);
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -3386,9 +3287,6 @@ static bool trans_vmv_s_x(DisasContext *s,
> >> arg_vmv_s_x *a)
> >> /* This instruction ignores LMUL and vector register groups */
> >> TCGv_i64 t1;
> >> TCGv s1;
> >> - TCGLabel *over = gen_new_label();
> >> -
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> t1 = tcg_temp_new_i64();
> >>
> >> @@ -3400,7 +3298,6 @@ static bool trans_vmv_s_x(DisasContext *s,
> >> arg_vmv_s_x *a)
> >> tcg_gen_ext_tl_i64(t1, s1);
> >> vec_element_storei(s, a->rd, 0, t1);
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -3442,10 +3339,6 @@ static bool trans_vfmv_s_f(DisasContext *s,
> >> arg_vfmv_s_f *a)
> >>
> >> /* The instructions ignore LMUL and vector register group. */
> >> TCGv_i64 t1;
> >> - TCGLabel *over = gen_new_label();
> >> -
> >> - /* if vstart >= vl, skip vector register write back */
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> /* NaN-box f[rs1] */
> >> t1 = tcg_temp_new_i64();
> >> @@ -3453,7 +3346,6 @@ static bool trans_vfmv_s_f(DisasContext *s,
> >> arg_vfmv_s_f *a)
> >>
> >> vec_element_storei(s, a->rd, 0, t1);
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -3624,8 +3516,6 @@ static bool trans_vcompress_vm(DisasContext *s,
> >> arg_r *a)
> >> gen_helper_vcompress_vm_b, gen_helper_vcompress_vm_h,
> >> gen_helper_vcompress_vm_w, gen_helper_vcompress_vm_d,
> >> };
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
> >>
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
> >> data = FIELD_DP32(data, VDATA, VTA, s->vta);
> >> @@ -3635,7 +3525,6 @@ static bool trans_vcompress_vm(DisasContext *s,
> >> arg_r *a)
> >> s->cfg_ptr->vlenb, data,
> >> fns[s->sew]);
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -3658,12 +3547,9 @@ static bool trans_##NAME(DisasContext *s,
> >> arg_##NAME * a) \
> >> vreg_ofs(s, a->rs2), maxsz, maxsz); \
> >> mark_vs_dirty(s); \
> >> } else { \
> >> - TCGLabel *over = gen_new_label(); \
> >> - tcg_gen_brcondi_tl(TCG_COND_GEU, cpu_vstart, maxsz, over); \
> >> tcg_gen_gvec_2_ptr(vreg_ofs(s, a->rd), vreg_ofs(s, a->rs2), \
> >> tcg_env, maxsz, maxsz, 0,
> >> gen_helper_vmvr_v); \
> >> mark_vs_dirty(s); \
> >> - gen_set_label(over); \
> >> } \
> >> return true; \
> >> } \
> >> @@ -3692,8 +3578,6 @@ static bool int_ext_op(DisasContext *s, arg_rmr *a,
> >> uint8_t seq)
> >> {
> >> uint32_t data = 0;
> >> gen_helper_gvec_3_ptr *fn;
> >> - TCGLabel *over = gen_new_label();
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >>
> >> static gen_helper_gvec_3_ptr * const fns[6][4] = {
> >> {
> >> @@ -3738,7 +3622,6 @@ static bool int_ext_op(DisasContext *s, arg_rmr *a,
> >> uint8_t seq)
> >> s->cfg_ptr->vlenb, data, fn);
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >>
> >> diff --git a/target/riscv/insn_trans/trans_rvvk.c.inc
> >> b/target/riscv/insn_trans/trans_rvvk.c.inc
> >> index a5cdd1b67f..6d640e4596 100644
> >> --- a/target/riscv/insn_trans/trans_rvvk.c.inc
> >> +++ b/target/riscv/insn_trans/trans_rvvk.c.inc
> >> @@ -164,8 +164,6 @@ GEN_OPIVX_GVEC_TRANS_CHECK(vandn_vx, andcs,
> >> zvkb_vx_check)
> >> gen_helper_##NAME##_w,
> >> \
> >> gen_helper_##NAME##_d,
> >> \
> >> };
> >> \
> >> - TCGLabel *over = gen_new_label();
> >> \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> \
> >>
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> \
> >> data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
> >> \
> >> @@ -177,7 +175,6 @@ GEN_OPIVX_GVEC_TRANS_CHECK(vandn_vx, andcs,
> >> zvkb_vx_check)
> >> s->cfg_ptr->vlenb, s->cfg_ptr->vlenb,
> >> \
> >> data, fns[s->sew]);
> >> \
> >> mark_vs_dirty(s);
> >> \
> >> - gen_set_label(over);
> >> \
> >> return true;
> >> \
> >> }
> >> \
> >> return false;
> >> \
> >> @@ -249,14 +246,12 @@ GEN_OPIVI_WIDEN_TRANS(vwsll_vi, IMM_ZX, vwsll_vx,
> >> vwsll_vx_check)
> >> TCGv_ptr rd_v, rs2_v;
> >> \
> >> TCGv_i32 desc, egs;
> >> \
> >> uint32_t data = 0;
> >> \
> >> - TCGLabel *over = gen_new_label();
> >> \
> >>
> >> \
> >> if (!s->vstart_eq_zero || !s->vl_eq_vlmax) {
> >> \
> >> /* save opcode for unwinding in case we throw an
> >> exception */ \
> >> decode_save_opc(s);
> >> \
> >> egs = tcg_constant_i32(EGS);
> >> \
> >> gen_helper_egs_check(egs, tcg_env);
> >> \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl,
> >> over); \
> >> }
> >> \
> >>
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> \
> >> @@ -272,7 +267,6 @@ GEN_OPIVI_WIDEN_TRANS(vwsll_vi, IMM_ZX, vwsll_vx,
> >> vwsll_vx_check)
> >> tcg_gen_addi_ptr(rs2_v, tcg_env, vreg_ofs(s, a->rs2));
> >> \
> >> gen_helper_##NAME(rd_v, rs2_v, tcg_env, desc);
> >> \
> >> mark_vs_dirty(s);
> >> \
> >> - gen_set_label(over);
> >> \
> >> return true;
> >> \
> >> }
> >> \
> >> return false;
> >> \
> >> @@ -325,14 +319,12 @@ GEN_V_UNMASKED_TRANS(vaesem_vs, vaes_check_vs,
> >> ZVKNED_EGS)
> >> TCGv_ptr rd_v, rs2_v;
> >> \
> >> TCGv_i32 uimm_v, desc, egs;
> >> \
> >> uint32_t data = 0;
> >> \
> >> - TCGLabel *over = gen_new_label();
> >> \
> >>
> >> \
> >> if (!s->vstart_eq_zero || !s->vl_eq_vlmax) {
> >> \
> >> /* save opcode for unwinding in case we throw an
> >> exception */ \
> >> decode_save_opc(s);
> >> \
> >> egs = tcg_constant_i32(EGS);
> >> \
> >> gen_helper_egs_check(egs, tcg_env);
> >> \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl,
> >> over); \
> >> }
> >> \
> >>
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> \
> >> @@ -350,7 +342,6 @@ GEN_V_UNMASKED_TRANS(vaesem_vs, vaes_check_vs,
> >> ZVKNED_EGS)
> >> tcg_gen_addi_ptr(rs2_v, tcg_env, vreg_ofs(s, a->rs2));
> >> \
> >> gen_helper_##NAME(rd_v, rs2_v, uimm_v, tcg_env, desc);
> >> \
> >> mark_vs_dirty(s);
> >> \
> >> - gen_set_label(over);
> >> \
> >> return true;
> >> \
> >> }
> >> \
> >> return false;
> >> \
> >> @@ -394,7 +385,6 @@ GEN_VI_UNMASKED_TRANS(vaeskf2_vi, vaeskf2_check,
> >> ZVKNED_EGS)
> >> {
> >> \
> >> if (CHECK(s, a)) {
> >> \
> >> uint32_t data = 0;
> >> \
> >> - TCGLabel *over = gen_new_label();
> >> \
> >> TCGv_i32 egs;
> >> \
> >>
> >> \
> >> if (!s->vstart_eq_zero || !s->vl_eq_vlmax) {
> >> \
> >> @@ -402,7 +392,6 @@ GEN_VI_UNMASKED_TRANS(vaeskf2_vi, vaeskf2_check,
> >> ZVKNED_EGS)
> >> decode_save_opc(s);
> >> \
> >> egs = tcg_constant_i32(EGS);
> >> \
> >> gen_helper_egs_check(egs, tcg_env);
> >> \
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl,
> >> over); \
> >> }
> >> \
> >>
> >> \
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> \
> >> @@ -417,7 +406,6 @@ GEN_VI_UNMASKED_TRANS(vaeskf2_vi, vaeskf2_check,
> >> ZVKNED_EGS)
> >> data, gen_helper_##NAME);
> >> \
> >>
> >> \
> >> mark_vs_dirty(s);
> >> \
> >> - gen_set_label(over);
> >> \
> >> return true;
> >> \
> >> }
> >> \
> >> return false;
> >> \
> >> @@ -448,7 +436,6 @@ static bool trans_vsha2cl_vv(DisasContext *s, arg_rmrr
> >> *a)
> >> {
> >> if (vsha_check(s, a)) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >> TCGv_i32 egs;
> >>
> >> if (!s->vstart_eq_zero || !s->vl_eq_vlmax) {
> >> @@ -456,7 +443,6 @@ static bool trans_vsha2cl_vv(DisasContext *s, arg_rmrr
> >> *a)
> >> decode_save_opc(s);
> >> egs = tcg_constant_i32(ZVKNH_EGS);
> >> gen_helper_egs_check(egs, tcg_env);
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> }
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> @@ -472,7 +458,6 @@ static bool trans_vsha2cl_vv(DisasContext *s, arg_rmrr
> >> *a)
> >> gen_helper_vsha2cl32_vv : gen_helper_vsha2cl64_vv);
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
> >> @@ -482,7 +467,6 @@ static bool trans_vsha2ch_vv(DisasContext *s, arg_rmrr
> >> *a)
> >> {
> >> if (vsha_check(s, a)) {
> >> uint32_t data = 0;
> >> - TCGLabel *over = gen_new_label();
> >> TCGv_i32 egs;
> >>
> >> if (!s->vstart_eq_zero || !s->vl_eq_vlmax) {
> >> @@ -490,7 +474,6 @@ static bool trans_vsha2ch_vv(DisasContext *s, arg_rmrr
> >> *a)
> >> decode_save_opc(s);
> >> egs = tcg_constant_i32(ZVKNH_EGS);
> >> gen_helper_egs_check(egs, tcg_env);
> >> - tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
> >> }
> >>
> >> data = FIELD_DP32(data, VDATA, VM, a->vm);
> >> @@ -506,7 +489,6 @@ static bool trans_vsha2ch_vv(DisasContext *s, arg_rmrr
> >> *a)
> >> gen_helper_vsha2ch32_vv : gen_helper_vsha2ch64_vv);
> >>
> >> mark_vs_dirty(s);
> >> - gen_set_label(over);
> >> return true;
> >> }
> >> return false;
>
[PATCH v7 4/9] target/riscv/translate.c: remove 'cpu_vstart' global, Daniel Henrique Barboza, 2024/03/06
[PATCH v7 6/9] target/riscv/vector_helper.c: set vstart = 0 in GEN_VEXT_VSLIDEUP_VX(), Daniel Henrique Barboza, 2024/03/06
[PATCH v7 8/9] target/riscv: Clear vstart_qe_zero flag, Daniel Henrique Barboza, 2024/03/06
[PATCH v7 9/9] target/riscv/vector_helper.c: optimize loops in ldst helpers, Daniel Henrique Barboza, 2024/03/06
[PATCH v7 7/9] trans_rvv.c.inc: remove redundant mark_vs_dirty() calls, Daniel Henrique Barboza, 2024/03/06
Re: [PATCH v7 0/9] riscv: set vstart_eq_zero on mark_vs_dirty, Alistair Francis, 2024/03/06