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Re: [PATCH v9 66/76] target/riscv: rvv-1.0: implement vstart CSR
From: |
Alistair Francis |
Subject: |
Re: [PATCH v9 66/76] target/riscv: rvv-1.0: implement vstart CSR |
Date: |
Tue, 16 Nov 2021 09:54:33 +1000 |
Alistair
On Fri, Oct 29, 2021 at 7:55 PM <frank.chang@sifive.com> wrote:
>
> From: Frank Chang <frank.chang@sifive.com>
>
> * Update and check vstart value for vector instructions.
> * Add whole register move instruction helper functions as we have to
> call helper function for case where vstart is not zero.
> * Remove probe_pages() calls in vector load/store instructions
> (except fault-only-first loads) to raise the memory access exception
> at the exact processed vector element.
>
> Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Alistair
> ---
> target/riscv/csr.c | 6 +-
> target/riscv/helper.h | 5 +
> target/riscv/insn_trans/trans_rvv.c.inc | 75 ++++++---
> target/riscv/translate.c | 6 +-
> target/riscv/vector_helper.c | 210 +++++++++++++++---------
> 5 files changed, 199 insertions(+), 103 deletions(-)
>
> diff --git a/target/riscv/csr.c b/target/riscv/csr.c
> index 3dfbc177381..146447eac5d 100644
> --- a/target/riscv/csr.c
> +++ b/target/riscv/csr.c
> @@ -343,7 +343,11 @@ static RISCVException write_vstart(CPURISCVState *env,
> int csrno,
> #if !defined(CONFIG_USER_ONLY)
> env->mstatus |= MSTATUS_VS;
> #endif
> - env->vstart = val;
> + /*
> + * The vstart CSR is defined to have only enough writable bits
> + * to hold the largest element index, i.e. lg2(VLEN) bits.
> + */
> + env->vstart = val & ~(~0ULL << ctzl(env_archcpu(env)->cfg.vlen));
> return RISCV_EXCP_NONE;
> }
>
> diff --git a/target/riscv/helper.h b/target/riscv/helper.h
> index 1a0d817f0f5..a717a87a0e0 100644
> --- a/target/riscv/helper.h
> +++ b/target/riscv/helper.h
> @@ -1073,6 +1073,11 @@ DEF_HELPER_6(vcompress_vm_h, void, ptr, ptr, ptr, ptr,
> env, i32)
> DEF_HELPER_6(vcompress_vm_w, void, ptr, ptr, ptr, ptr, env, i32)
> DEF_HELPER_6(vcompress_vm_d, void, ptr, ptr, ptr, ptr, env, i32)
>
> +DEF_HELPER_4(vmv1r_v, void, ptr, ptr, env, i32)
> +DEF_HELPER_4(vmv2r_v, void, ptr, ptr, env, i32)
> +DEF_HELPER_4(vmv4r_v, void, ptr, ptr, env, i32)
> +DEF_HELPER_4(vmv8r_v, void, ptr, ptr, env, i32)
> +
> DEF_HELPER_5(vzext_vf2_h, void, ptr, ptr, ptr, env, i32)
> DEF_HELPER_5(vzext_vf2_w, void, ptr, ptr, ptr, env, i32)
> DEF_HELPER_5(vzext_vf2_d, void, ptr, ptr, ptr, env, i32)
> diff --git a/target/riscv/insn_trans/trans_rvv.c.inc
> b/target/riscv/insn_trans/trans_rvv.c.inc
> index be3f9f13275..7589c8ce32a 100644
> --- a/target/riscv/insn_trans/trans_rvv.c.inc
> +++ b/target/riscv/insn_trans/trans_rvv.c.inc
> @@ -490,7 +490,7 @@ static bool vext_check_sds(DisasContext *s, int vd, int
> vs1, int vs2, int vm)
> */
> static bool vext_check_reduction(DisasContext *s, int vs2)
> {
> - return require_align(vs2, s->lmul);
> + return require_align(vs2, s->lmul) && (s->vstart == 0);
> }
>
> /*
> @@ -2786,7 +2786,8 @@ GEN_MM_TRANS(vmxnor_mm)
> static bool trans_vcpop_m(DisasContext *s, arg_rmr *a)
> {
> if (require_rvv(s) &&
> - vext_check_isa_ill(s)) {
> + vext_check_isa_ill(s) &&
> + s->vstart == 0) {
> TCGv_ptr src2, mask;
> TCGv dst;
> TCGv_i32 desc;
> @@ -2817,7 +2818,8 @@ static bool trans_vcpop_m(DisasContext *s, arg_rmr *a)
> static bool trans_vfirst_m(DisasContext *s, arg_rmr *a)
> {
> if (require_rvv(s) &&
> - vext_check_isa_ill(s)) {
> + vext_check_isa_ill(s) &&
> + s->vstart == 0) {
> TCGv_ptr src2, mask;
> TCGv dst;
> TCGv_i32 desc;
> @@ -2852,7 +2854,8 @@ static bool trans_##NAME(DisasContext *s, arg_rmr *a)
> \
> if (require_rvv(s) && \
> vext_check_isa_ill(s) && \
> require_vm(a->vm, a->rd) && \
> - (a->rd != a->rs2)) { \
> + (a->rd != a->rs2) && \
> + (s->vstart == 0)) { \
> uint32_t data = 0; \
> gen_helper_gvec_3_ptr *fn = gen_helper_##NAME; \
> TCGLabel *over = gen_new_label(); \
> @@ -2888,7 +2891,8 @@ static bool trans_viota_m(DisasContext *s, arg_viota_m
> *a)
> vext_check_isa_ill(s) &&
> !is_overlapped(a->rd, 1 << MAX(s->lmul, 0), a->rs2, 1) &&
> require_vm(a->vm, a->rd) &&
> - require_align(a->rd, s->lmul)) {
> + require_align(a->rd, s->lmul) &&
> + (s->vstart == 0)) {
> uint32_t data = 0;
> TCGLabel *over = gen_new_label();
> tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
> @@ -3109,6 +3113,7 @@ static bool trans_vmv_s_x(DisasContext *s, arg_vmv_s_x
> *a)
> TCGLabel *over = gen_new_label();
>
> tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
> + tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
>
> t1 = tcg_temp_new_i64();
>
> @@ -3161,8 +3166,9 @@ static bool trans_vfmv_s_f(DisasContext *s,
> arg_vfmv_s_f *a)
> TCGv_i64 t1;
> TCGLabel *over = gen_new_label();
>
> - /* if vl == 0, skip vector register write back */
> + /* if vl == 0 or vstart >= vl, skip vector register write back */
> tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
> + tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);
>
> /* NaN-box f[rs1] */
> t1 = tcg_temp_new_i64();
> @@ -3333,7 +3339,8 @@ static bool vcompress_vm_check(DisasContext *s, arg_r
> *a)
> require_align(a->rd, s->lmul) &&
> require_align(a->rs2, s->lmul) &&
> (a->rd != a->rs2) &&
> - !is_overlapped(a->rd, 1 << MAX(s->lmul, 0), a->rs1, 1);
> + !is_overlapped(a->rd, 1 << MAX(s->lmul, 0), a->rs1, 1) &&
> + (s->vstart == 0);
> }
>
> static bool trans_vcompress_vm(DisasContext *s, arg_r *a)
> @@ -3363,26 +3370,40 @@ static bool trans_vcompress_vm(DisasContext *s, arg_r
> *a)
> * Whole Vector Register Move Instructions ignore vtype and vl setting.
> * Thus, we don't need to check vill bit. (Section 16.6)
> */
> -#define GEN_VMV_WHOLE_TRANS(NAME, LEN) \
> -static bool trans_##NAME(DisasContext *s, arg_##NAME * a) \
> -{ \
> - if (require_rvv(s) && \
> - QEMU_IS_ALIGNED(a->rd, LEN) && \
> - QEMU_IS_ALIGNED(a->rs2, LEN)) { \
> - /* EEW = 8 */ \
> - tcg_gen_gvec_mov(MO_8, vreg_ofs(s, a->rd), \
> - vreg_ofs(s, a->rs2), \
> - s->vlen / 8 * LEN, s->vlen / 8 * LEN); \
> - mark_vs_dirty(s); \
> - return true; \
> - } \
> - return false; \
> -}
> -
> -GEN_VMV_WHOLE_TRANS(vmv1r_v, 1)
> -GEN_VMV_WHOLE_TRANS(vmv2r_v, 2)
> -GEN_VMV_WHOLE_TRANS(vmv4r_v, 4)
> -GEN_VMV_WHOLE_TRANS(vmv8r_v, 8)
> +#define GEN_VMV_WHOLE_TRANS(NAME, LEN, SEQ) \
> +static bool trans_##NAME(DisasContext *s, arg_##NAME * a) \
> +{ \
> + if (require_rvv(s) && \
> + QEMU_IS_ALIGNED(a->rd, LEN) && \
> + QEMU_IS_ALIGNED(a->rs2, LEN)) { \
> + uint32_t maxsz = (s->vlen >> 3) * LEN; \
> + if (s->vstart == 0) { \
> + /* EEW = 8 */ \
> + tcg_gen_gvec_mov(MO_8, vreg_ofs(s, a->rd), \
> + 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); \
> + \
> + static gen_helper_gvec_2_ptr * const fns[4] = { \
> + gen_helper_vmv1r_v, gen_helper_vmv2r_v, \
> + gen_helper_vmv4r_v, gen_helper_vmv8r_v, \
> + }; \
> + tcg_gen_gvec_2_ptr(vreg_ofs(s, a->rd), vreg_ofs(s, a->rs2), \
> + cpu_env, maxsz, maxsz, 0, fns[SEQ]); \
> + mark_vs_dirty(s); \
> + gen_set_label(over); \
> + } \
> + return true; \
> + } \
> + return false; \
> +}
> +
> +GEN_VMV_WHOLE_TRANS(vmv1r_v, 1, 0)
> +GEN_VMV_WHOLE_TRANS(vmv2r_v, 2, 1)
> +GEN_VMV_WHOLE_TRANS(vmv4r_v, 4, 2)
> +GEN_VMV_WHOLE_TRANS(vmv8r_v, 8, 3)
>
> static bool int_ext_check(DisasContext *s, arg_rmr *a, uint8_t div)
> {
> diff --git a/target/riscv/translate.c b/target/riscv/translate.c
> index b4df21bda3c..68edaaf6ac7 100644
> --- a/target/riscv/translate.c
> +++ b/target/riscv/translate.c
> @@ -33,7 +33,7 @@
> #include "internals.h"
>
> /* global register indices */
> -static TCGv cpu_gpr[32], cpu_pc, cpu_vl;
> +static TCGv cpu_gpr[32], cpu_pc, cpu_vl, cpu_vstart;
> static TCGv_i64 cpu_fpr[32]; /* assume F and D extensions */
> static TCGv load_res;
> static TCGv load_val;
> @@ -96,6 +96,7 @@ typedef struct DisasContext {
> int8_t lmul;
> uint8_t sew;
> uint16_t vlen;
> + target_ulong vstart;
> bool vl_eq_vlmax;
> uint8_t ntemp;
> CPUState *cs;
> @@ -710,6 +711,7 @@ static void riscv_tr_init_disas_context(DisasContextBase
> *dcbase, CPUState *cs)
> ctx->vill = FIELD_EX32(tb_flags, TB_FLAGS, VILL);
> ctx->sew = FIELD_EX32(tb_flags, TB_FLAGS, SEW);
> ctx->lmul = sextract32(FIELD_EX32(tb_flags, TB_FLAGS, LMUL), 0, 3);
> + ctx->vstart = env->vstart;
> ctx->vl_eq_vlmax = FIELD_EX32(tb_flags, TB_FLAGS, VL_EQ_VLMAX);
> ctx->xl = FIELD_EX32(tb_flags, TB_FLAGS, XL);
> ctx->cs = cs;
> @@ -828,6 +830,8 @@ void riscv_translate_init(void)
>
> cpu_pc = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, pc), "pc");
> cpu_vl = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, vl), "vl");
> + cpu_vstart = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, vstart),
> + "vstart");
> load_res = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, load_res),
> "load_res");
> load_val = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, load_val),
> diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
> index e61c8731425..22848d6b683 100644
> --- a/target/riscv/vector_helper.c
> +++ b/target/riscv/vector_helper.c
> @@ -226,25 +226,19 @@ vext_ldst_stride(void *vd, void *v0, target_ulong base,
> uint32_t nf = vext_nf(desc);
> uint32_t max_elems = vext_max_elems(desc, esz);
>
> - /* probe every access*/
> - for (i = 0; i < env->vl; i++) {
> + for (i = env->vstart; i < env->vl; i++, env->vstart++) {
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> }
> - probe_pages(env, base + stride * i, nf << esz, ra, access_type);
> - }
> - /* do real access */
> - for (i = 0; i < env->vl; i++) {
> +
> k = 0;
> - if (!vm && !vext_elem_mask(v0, i)) {
> - continue;
> - }
> while (k < nf) {
> target_ulong addr = base + stride * i + (k << esz);
> ldst_elem(env, addr, i + k * max_elems, vd, ra);
> k++;
> }
> }
> + env->vstart = 0;
> }
>
> #define GEN_VEXT_LD_STRIDE(NAME, ETYPE, LOAD_FN) \
> @@ -291,10 +285,8 @@ vext_ldst_us(void *vd, target_ulong base, CPURISCVState
> *env, uint32_t desc,
> uint32_t nf = vext_nf(desc);
> uint32_t max_elems = vext_max_elems(desc, esz);
>
> - /* probe every access */
> - probe_pages(env, base, env->vl * (nf << esz), ra, access_type);
> /* load bytes from guest memory */
> - for (i = 0; i < env->vl; i++) {
> + for (i = env->vstart; i < env->vl; i++, env->vstart++) {
> k = 0;
> while (k < nf) {
> target_ulong addr = base + ((i * nf + k) << esz);
> @@ -302,6 +294,7 @@ vext_ldst_us(void *vd, target_ulong base, CPURISCVState
> *env, uint32_t desc,
> k++;
> }
> }
> + env->vstart = 0;
> }
>
> /*
> @@ -381,26 +374,20 @@ vext_ldst_index(void *vd, void *v0, target_ulong base,
> uint32_t vm = vext_vm(desc);
> uint32_t max_elems = vext_max_elems(desc, esz);
>
> - /* probe every access*/
> - for (i = 0; i < env->vl; i++) {
> - if (!vm && !vext_elem_mask(v0, i)) {
> - continue;
> - }
> - probe_pages(env, get_index_addr(base, i, vs2), nf << esz, ra,
> - access_type);
> - }
> /* load bytes from guest memory */
> - for (i = 0; i < env->vl; i++) {
> - k = 0;
> + for (i = env->vstart; i < env->vl; i++, env->vstart++) {
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> }
> +
> + k = 0;
> while (k < nf) {
> abi_ptr addr = get_index_addr(base, i, vs2) + (k << esz);
> ldst_elem(env, addr, i + k * max_elems, vd, ra);
> k++;
> }
> }
> + env->vstart = 0;
> }
>
> #define GEN_VEXT_LD_INDEX(NAME, ETYPE, INDEX_FN, LOAD_FN) \
> @@ -471,7 +458,7 @@ vext_ldff(void *vd, void *v0, target_ulong base,
> target_ulong addr, offset, remain;
>
> /* probe every access*/
> - for (i = 0; i < env->vl; i++) {
> + for (i = env->vstart; i < env->vl; i++) {
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> }
> @@ -511,7 +498,7 @@ ProbeSuccess:
> if (vl != 0) {
> env->vl = vl;
> }
> - for (i = 0; i < env->vl; i++) {
> + for (i = env->vstart; i < env->vl; i++) {
> k = 0;
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> @@ -522,6 +509,7 @@ ProbeSuccess:
> k++;
> }
> }
> + env->vstart = 0;
> }
>
> #define GEN_VEXT_LDFF(NAME, ETYPE, LOAD_FN) \
> @@ -559,21 +547,32 @@ vext_ldst_whole(void *vd, target_ulong base,
> CPURISCVState *env, uint32_t desc,
> vext_ldst_elem_fn *ldst_elem, uint32_t esz, uintptr_t ra,
> MMUAccessType access_type)
> {
> - uint32_t i, k;
> + uint32_t i, k, off, pos;
> uint32_t nf = vext_nf(desc);
> uint32_t vlenb = env_archcpu(env)->cfg.vlen >> 3;
> uint32_t max_elems = vlenb >> esz;
>
> - /* probe every access */
> - probe_pages(env, base, vlenb * nf, ra, access_type);
> + k = env->vstart / max_elems;
> + off = env->vstart % max_elems;
>
> - /* load bytes from guest memory */
> - for (k = 0; k < nf; k++) {
> - for (i = 0; i < max_elems; i++) {
> + if (off) {
> + /* load/store rest of elements of current segment pointed by vstart
> */
> + for (pos = off; pos < max_elems; pos++, env->vstart++) {
> + target_ulong addr = base + ((pos + k * max_elems) << esz);
> + ldst_elem(env, addr, pos + k * max_elems, vd, ra);
> + }
> + k++;
> + }
> +
> + /* load/store elements for rest of segments */
> + for (; k < nf; k++) {
> + for (i = 0; i < max_elems; i++, env->vstart++) {
> target_ulong addr = base + ((i + k * max_elems) << esz);
> ldst_elem(env, addr, i + k * max_elems, vd, ra);
> }
> }
> +
> + env->vstart = 0;
> }
>
> #define GEN_VEXT_LD_WHOLE(NAME, ETYPE, LOAD_FN) \
> @@ -686,12 +685,13 @@ static void do_vext_vv(void *vd, void *v0, void *vs1,
> void *vs2,
> uint32_t vl = env->vl;
> uint32_t i;
>
> - for (i = 0; i < vl; i++) {
> + for (i = env->vstart; i < vl; i++) {
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> }
> fn(vd, vs1, vs2, i);
> }
> + env->vstart = 0;
> }
>
> /* generate the helpers for OPIVV */
> @@ -748,12 +748,13 @@ static void do_vext_vx(void *vd, void *v0, target_long
> s1, void *vs2,
> uint32_t vl = env->vl;
> uint32_t i;
>
> - for (i = 0; i < vl; i++) {
> + for (i = env->vstart; i < vl; i++) {
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> }
> fn(vd, s1, vs2, i);
> }
> + env->vstart = 0;
> }
>
> /* generate the helpers for OPIVX */
> @@ -941,13 +942,14 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
> *vs2, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s1 = *((ETYPE *)vs1 + H(i)); \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> ETYPE carry = vext_elem_mask(v0, i); \
> \
> *((ETYPE *)vd + H(i)) = DO_OP(s2, s1, carry); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VADC_VVM(vadc_vvm_b, uint8_t, H1, DO_VADC)
> @@ -967,12 +969,13 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
> void *vs2, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> ETYPE carry = vext_elem_mask(v0, i); \
> \
> *((ETYPE *)vd + H(i)) = DO_OP(s2, (ETYPE)(target_long)s1, carry);\
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VADC_VXM(vadc_vxm_b, uint8_t, H1, DO_VADC)
> @@ -997,12 +1000,13 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
> *vs2, \
> uint32_t vm = vext_vm(desc); \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s1 = *((ETYPE *)vs1 + H(i)); \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> ETYPE carry = !vm && vext_elem_mask(v0, i); \
> vext_set_elem_mask(vd, i, DO_OP(s2, s1, carry)); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VMADC_VVM(vmadc_vvm_b, uint8_t, H1, DO_MADC)
> @@ -1023,12 +1027,13 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong
> s1, \
> uint32_t vm = vext_vm(desc); \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> ETYPE carry = !vm && vext_elem_mask(v0, i); \
> vext_set_elem_mask(vd, i, \
> DO_OP(s2, (ETYPE)(target_long)s1, carry)); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VMADC_VXM(vmadc_vxm_b, uint8_t, H1, DO_MADC)
> @@ -1105,7 +1110,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1,
> \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> @@ -1113,6 +1118,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1,
> \
> TS2 s2 = *((TS2 *)vs2 + HS2(i)); \
> *((TS1 *)vd + HS1(i)) = OP(s2, s1 & MASK); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_SHIFT_VV(vsll_vv_b, uint8_t, uint8_t, H1, H1, DO_SLL, 0x7)
> @@ -1139,13 +1145,14 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong
> s1, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> TS2 s2 = *((TS2 *)vs2 + HS2(i)); \
> *((TD *)vd + HD(i)) = OP(s2, s1 & MASK); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_SHIFT_VX(vsll_vx_b, uint8_t, int8_t, H1, H1, DO_SLL, 0x7)
> @@ -1192,7 +1199,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
> *vs2, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s1 = *((ETYPE *)vs1 + H(i)); \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> if (!vm && !vext_elem_mask(v0, i)) { \
> @@ -1200,6 +1207,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
> *vs2, \
> } \
> vext_set_elem_mask(vd, i, DO_OP(s2, s1)); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_CMP_VV(vmseq_vv_b, uint8_t, H1, DO_MSEQ)
> @@ -1240,7 +1248,7 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
> void *vs2, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> @@ -1248,6 +1256,7 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
> void *vs2, \
> vext_set_elem_mask(vd, i, \
> DO_OP(s2, (ETYPE)(target_long)s1)); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_CMP_VX(vmseq_vx_b, uint8_t, H1, DO_MSEQ)
> @@ -1770,10 +1779,11 @@ void HELPER(NAME)(void *vd, void *vs1, CPURISCVState
> *env, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s1 = *((ETYPE *)vs1 + H(i)); \
> *((ETYPE *)vd + H(i)) = s1; \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VMV_VV(vmv_v_v_b, int8_t, H1)
> @@ -1788,9 +1798,10 @@ void HELPER(NAME)(void *vd, uint64_t s1, CPURISCVState
> *env, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> *((ETYPE *)vd + H(i)) = (ETYPE)s1; \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VMV_VX(vmv_v_x_b, int8_t, H1)
> @@ -1805,10 +1816,11 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
> *vs2, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE *vt = (!vext_elem_mask(v0, i) ? vs2 : vs1); \
> *((ETYPE *)vd + H(i)) = *(vt + H(i)); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VMERGE_VV(vmerge_vvm_b, int8_t, H1)
> @@ -1823,12 +1835,13 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong
> s1, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> ETYPE d = (!vext_elem_mask(v0, i) ? s2 : \
> (ETYPE)(target_long)s1); \
> *((ETYPE *)vd + H(i)) = d; \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VMERGE_VX(vmerge_vxm_b, int8_t, H1)
> @@ -1865,12 +1878,13 @@ vext_vv_rm_1(void *vd, void *v0, void *vs1, void *vs2,
> uint32_t vl, uint32_t vm, int vxrm,
> opivv2_rm_fn *fn)
> {
> - for (uint32_t i = 0; i < vl; i++) {
> + for (uint32_t i = env->vstart; i < vl; i++) {
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> }
> fn(vd, vs1, vs2, i, env, vxrm);
> }
> + env->vstart = 0;
> }
>
> static inline void
> @@ -1981,12 +1995,13 @@ vext_vx_rm_1(void *vd, void *v0, target_long s1, void
> *vs2,
> uint32_t vl, uint32_t vm, int vxrm,
> opivx2_rm_fn *fn)
> {
> - for (uint32_t i = 0; i < vl; i++) {
> + for (uint32_t i = env->vstart; i < vl; i++) {
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> }
> fn(vd, s1, vs2, i, env, vxrm);
> }
> + env->vstart = 0;
> }
>
> static inline void
> @@ -2768,12 +2783,13 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1,
> \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> do_##NAME(vd, vs1, vs2, i, env); \
> } \
> + env->vstart = 0; \
> }
>
> RVVCALL(OPFVV2, vfadd_vv_h, OP_UUU_H, H2, H2, H2, float16_add)
> @@ -2800,12 +2816,13 @@ void HELPER(NAME)(void *vd, void *v0, uint64_t s1,
> \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> do_##NAME(vd, s1, vs2, i, env); \
> } \
> + env->vstart = 0; \
> }
>
> RVVCALL(OPFVF2, vfadd_vf_h, OP_UUU_H, H2, H2, float16_add)
> @@ -3371,12 +3388,13 @@ void HELPER(NAME)(void *vd, void *v0, void *vs2,
> \
> if (vl == 0) { \
> return; \
> } \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> do_##NAME(vd, vs2, i, env); \
> } \
> + env->vstart = 0; \
> }
>
> RVVCALL(OPFVV1, vfsqrt_v_h, OP_UU_H, H2, H2, float16_sqrt)
> @@ -3507,7 +3525,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
> *vs2, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s1 = *((ETYPE *)vs1 + H(i)); \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> if (!vm && !vext_elem_mask(v0, i)) { \
> @@ -3516,6 +3534,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
> *vs2, \
> vext_set_elem_mask(vd, i, \
> DO_OP(s2, s1, &env->fp_status)); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_CMP_VV_ENV(vmfeq_vv_h, uint16_t, H2, float16_eq_quiet)
> @@ -3530,7 +3549,7 @@ void HELPER(NAME)(void *vd, void *v0, uint64_t s1, void
> *vs2, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> @@ -3538,6 +3557,7 @@ void HELPER(NAME)(void *vd, void *v0, uint64_t s1, void
> *vs2, \
> vext_set_elem_mask(vd, i, \
> DO_OP(s2, (ETYPE)s1, &env->fp_status)); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_CMP_VF(vmfeq_vf_h, uint16_t, H2, float16_eq_quiet)
> @@ -3646,12 +3666,13 @@ void HELPER(NAME)(void *vd, void *v0, void *vs2,
> \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> do_##NAME(vd, vs2, i); \
> } \
> + env->vstart = 0; \
> }
>
> target_ulong fclass_h(uint64_t frs1)
> @@ -3727,11 +3748,12 @@ void HELPER(NAME)(void *vd, void *v0, uint64_t s1,
> void *vs2, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
> *((ETYPE *)vd + H(i)) \
> = (!vm && !vext_elem_mask(v0, i) ? s2 : s1); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VFMERGE_VF(vfmerge_vfm_h, int16_t, H2)
> @@ -3875,7 +3897,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1,
> \
> uint32_t i; \
> TD s1 = *((TD *)vs1 + HD(0)); \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> TS2 s2 = *((TS2 *)vs2 + HS2(i)); \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> @@ -3883,6 +3905,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1,
> \
> s1 = OP(s1, (TD)s2); \
> } \
> *((TD *)vd + HD(0)) = s1; \
> + env->vstart = 0; \
> }
>
> /* vd[0] = sum(vs1[0], vs2[*]) */
> @@ -3955,7 +3978,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1,
> \
> uint32_t i; \
> TD s1 = *((TD *)vs1 + HD(0)); \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> TS2 s2 = *((TS2 *)vs2 + HS2(i)); \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> @@ -3963,6 +3986,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1,
> \
> s1 = OP(s1, (TD)s2, &env->fp_status); \
> } \
> *((TD *)vd + HD(0)) = s1; \
> + env->vstart = 0; \
> }
>
> /* Unordered sum */
> @@ -3990,7 +4014,7 @@ void HELPER(vfwredsum_vs_h)(void *vd, void *v0, void
> *vs1,
> uint32_t i;
> uint32_t s1 = *((uint32_t *)vs1 + H4(0));
>
> - for (i = 0; i < vl; i++) {
> + for (i = env->vstart; i < vl; i++) {
> uint16_t s2 = *((uint16_t *)vs2 + H2(i));
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> @@ -3999,6 +4023,7 @@ void HELPER(vfwredsum_vs_h)(void *vd, void *v0, void
> *vs1,
> &env->fp_status);
> }
> *((uint32_t *)vd + H4(0)) = s1;
> + env->vstart = 0;
> }
>
> void HELPER(vfwredsum_vs_w)(void *vd, void *v0, void *vs1,
> @@ -4009,7 +4034,7 @@ void HELPER(vfwredsum_vs_w)(void *vd, void *v0, void
> *vs1,
> uint32_t i;
> uint64_t s1 = *((uint64_t *)vs1);
>
> - for (i = 0; i < vl; i++) {
> + for (i = env->vstart; i < vl; i++) {
> uint32_t s2 = *((uint32_t *)vs2 + H4(i));
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> @@ -4018,6 +4043,7 @@ void HELPER(vfwredsum_vs_w)(void *vd, void *v0, void
> *vs1,
> &env->fp_status);
> }
> *((uint64_t *)vd) = s1;
> + env->vstart = 0;
> }
>
> /*
> @@ -4033,11 +4059,12 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1,
> \
> uint32_t i; \
> int a, b; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> a = vext_elem_mask(vs1, i); \
> b = vext_elem_mask(vs2, i); \
> vext_set_elem_mask(vd, i, OP(b, a)); \
> } \
> + env->vstart = 0; \
> }
>
> #define DO_NAND(N, M) (!(N & M))
> @@ -4064,13 +4091,14 @@ target_ulong HELPER(vcpop_m)(void *v0, void *vs2,
> CPURISCVState *env,
> uint32_t vl = env->vl;
> int i;
>
> - for (i = 0; i < vl; i++) {
> + for (i = env->vstart; i < vl; i++) {
> if (vm || vext_elem_mask(v0, i)) {
> if (vext_elem_mask(vs2, i)) {
> cnt++;
> }
> }
> }
> + env->vstart = 0;
> return cnt;
> }
>
> @@ -4082,13 +4110,14 @@ target_ulong HELPER(vfirst_m)(void *v0, void *vs2,
> CPURISCVState *env,
> uint32_t vl = env->vl;
> int i;
>
> - for (i = 0; i < vl; i++) {
> + for (i = env->vstart; i < vl; i++) {
> if (vm || vext_elem_mask(v0, i)) {
> if (vext_elem_mask(vs2, i)) {
> return i;
> }
> }
> }
> + env->vstart = 0;
> return -1LL;
> }
>
> @@ -4106,7 +4135,7 @@ static void vmsetm(void *vd, void *v0, void *vs2,
> CPURISCVState *env,
> int i;
> bool first_mask_bit = false;
>
> - for (i = 0; i < vl; i++) {
> + for (i = env->vstart; i < vl; i++) {
> if (!vm && !vext_elem_mask(v0, i)) {
> continue;
> }
> @@ -4130,6 +4159,7 @@ static void vmsetm(void *vd, void *v0, void *vs2,
> CPURISCVState *env,
> }
> }
> }
> + env->vstart = 0;
> }
>
> void HELPER(vmsbf_m)(void *vd, void *v0, void *vs2, CPURISCVState *env,
> @@ -4160,7 +4190,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs2,
> CPURISCVState *env, \
> uint32_t sum = 0; \
> int i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> @@ -4169,6 +4199,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs2,
> CPURISCVState *env, \
> sum++; \
> } \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VIOTA_M(viota_m_b, uint8_t, H1)
> @@ -4184,12 +4215,13 @@ void HELPER(NAME)(void *vd, void *v0, CPURISCVState
> *env, uint32_t desc) \
> uint32_t vl = env->vl; \
> int i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> *((ETYPE *)vd + H(i)) = i; \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VID_V(vid_v_b, uint8_t, H1)
> @@ -4208,9 +4240,10 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
> void *vs2, \
> { \
> uint32_t vm = vext_vm(desc); \
> uint32_t vl = env->vl; \
> - target_ulong offset = s1, i; \
> + target_ulong offset = s1, i_min, i; \
> \
> - for (i = offset; i < vl; i++) { \
> + i_min = MAX(env->vstart, offset); \
> + for (i = i_min; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> @@ -4233,8 +4266,8 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
> void *vs2, \
> uint32_t vl = env->vl; \
> target_ulong i_max, i; \
> \
> - i_max = MIN(s1 < vlmax ? vlmax - s1 : 0, vl); \
> - for (i = 0; i < i_max; ++i) { \
> + i_max = MAX(MIN(s1 < vlmax ? vlmax - s1 : 0, vl), env->vstart); \
> + for (i = env->vstart; i < i_max; ++i) { \
> if (vm || vext_elem_mask(v0, i)) { \
> *((ETYPE *)vd + H(i)) = *((ETYPE *)vs2 + H(i + s1)); \
> } \
> @@ -4245,6 +4278,8 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
> void *vs2, \
> *((ETYPE *)vd + H(i)) = 0; \
> } \
> } \
> + \
> + env->vstart = 0; \
> }
>
> /* vslidedown.vx vd, vs2, rs1, vm # vd[i] = vs2[i+rs1] */
> @@ -4262,7 +4297,7 @@ static void vslide1up_##ESZ(void *vd, void *v0,
> target_ulong s1, void *vs2, \
> uint32_t vl = env->vl; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> @@ -4272,6 +4307,7 @@ static void vslide1up_##ESZ(void *vd, void *v0,
> target_ulong s1, void *vs2, \
> *((ETYPE *)vd + H(i)) = *((ETYPE *)vs2 + H(i - 1)); \
> } \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_VSLIE1UP(8, H1)
> @@ -4301,7 +4337,7 @@ static void vslide1down_##ESZ(void *vd, void *v0,
> target_ulong s1, void *vs2, \
> uint32_t vl = env->vl;
> \
> uint32_t i;
> \
>
> \
> - for (i = 0; i < vl; i++) {
> \
> + for (i = env->vstart; i < vl; i++) {
> \
> if (!vm && !vext_elem_mask(v0, i)) {
> \
> continue;
> \
> }
> \
> @@ -4311,6 +4347,7 @@ static void vslide1down_##ESZ(void *vd, void *v0,
> target_ulong s1, void *vs2, \
> *((ETYPE *)vd + H(i)) = *((ETYPE *)vs2 + H(i + 1));
> \
> }
> \
> }
> \
> + env->vstart = 0;
> \
> }
>
> GEN_VEXT_VSLIDE1DOWN(8, H1)
> @@ -4361,13 +4398,13 @@ GEN_VEXT_VFSLIDE1DOWN_VF(vfslide1down_vf_d, 64)
> void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2, \
> CPURISCVState *env, uint32_t desc) \
> { \
> - uint32_t vlmax = vext_max_elems(desc, ctzl(sizeof(TS1))); \
> + uint32_t vlmax = vext_max_elems(desc, ctzl(sizeof(TS2))); \
> uint32_t vm = vext_vm(desc); \
> uint32_t vl = env->vl; \
> uint64_t index; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> @@ -4378,6 +4415,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
> *vs2, \
> *((TS2 *)vd + HS2(i)) = *((TS2 *)vs2 + HS2(index)); \
> } \
> } \
> + env->vstart = 0; \
> }
>
> /* vd[i] = (vs1[i] >= VLMAX) ? 0 : vs2[vs1[i]]; */
> @@ -4401,7 +4439,7 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
> void *vs2, \
> uint64_t index = s1; \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> @@ -4411,6 +4449,7 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1,
> void *vs2, \
> *((ETYPE *)vd + H(i)) = *((ETYPE *)vs2 + H(index)); \
> } \
> } \
> + env->vstart = 0; \
> }
>
> /* vd[i] = (x[rs1] >= VLMAX) ? 0 : vs2[rs1] */
> @@ -4427,13 +4466,14 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void
> *vs2, \
> uint32_t vl = env->vl; \
> uint32_t num = 0, i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vext_elem_mask(vs1, i)) { \
> continue; \
> } \
> *((ETYPE *)vd + H(num)) = *((ETYPE *)vs2 + H(i)); \
> num++; \
> } \
> + env->vstart = 0; \
> }
>
> /* Compress into vd elements of vs2 where vs1 is enabled */
> @@ -4442,6 +4482,27 @@ GEN_VEXT_VCOMPRESS_VM(vcompress_vm_h, uint16_t, H2)
> GEN_VEXT_VCOMPRESS_VM(vcompress_vm_w, uint32_t, H4)
> GEN_VEXT_VCOMPRESS_VM(vcompress_vm_d, uint64_t, H8)
>
> +/* Vector Whole Register Move */
> +#define GEN_VEXT_VMV_WHOLE(NAME, LEN) \
> +void HELPER(NAME)(void *vd, void *vs2, CPURISCVState *env, \
> + uint32_t desc) \
> +{ \
> + /* EEW = 8 */ \
> + uint32_t maxsz = simd_maxsz(desc); \
> + uint32_t i = env->vstart; \
> + \
> + memcpy((uint8_t *)vd + H1(i), \
> + (uint8_t *)vs2 + H1(i), \
> + maxsz - env->vstart); \
> + \
> + env->vstart = 0; \
> +}
> +
> +GEN_VEXT_VMV_WHOLE(vmv1r_v, 1)
> +GEN_VEXT_VMV_WHOLE(vmv2r_v, 2)
> +GEN_VEXT_VMV_WHOLE(vmv4r_v, 4)
> +GEN_VEXT_VMV_WHOLE(vmv8r_v, 8)
> +
> /* Vector Integer Extension */
> #define GEN_VEXT_INT_EXT(NAME, ETYPE, DTYPE, HD, HS1) \
> void HELPER(NAME)(void *vd, void *v0, void *vs2, \
> @@ -4451,12 +4512,13 @@ void HELPER(NAME)(void *vd, void *v0, void *vs2,
> \
> uint32_t vm = vext_vm(desc); \
> uint32_t i; \
> \
> - for (i = 0; i < vl; i++) { \
> + for (i = env->vstart; i < vl; i++) { \
> if (!vm && !vext_elem_mask(v0, i)) { \
> continue; \
> } \
> *((ETYPE *)vd + HD(i)) = *((DTYPE *)vs2 + HS1(i)); \
> } \
> + env->vstart = 0; \
> }
>
> GEN_VEXT_INT_EXT(vzext_vf2_h, uint16_t, uint8_t, H2, H1)
> --
> 2.25.1
>
>
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- Re: [PATCH v9 66/76] target/riscv: rvv-1.0: implement vstart CSR,
Alistair Francis <=