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target/riscv: rvv: Add tail agnostic for vector mask instructions

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The tail elements in the destination mask register are updated under
a tail-agnostic policy.

Signed-off-by: eop Chen <eop.chen@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <165449614532.19704.7000832880482980398-14@git.sr.ht>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
eopXD 2022-06-06 06:16:35 +00:00 • committed by Alistair Francis
parent df4f52a758
commit acc6ffd482
2 changed files with 36 additions and 0 deletions
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30
target/riscv/vector_helper.c
View file

@ -4717,6 +4717,8 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, \
uint32_t desc) \
{ \
uint32_t vl = env->vl; \
uint32_t total_elems = env_archcpu(env)->cfg.vlen; \
uint32_t vta_all_1s = vext_vta_all_1s(desc); \
uint32_t i; \
int a, b; \
\
@ -4726,6 +4728,15 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, \
vext_set_elem_mask(vd, i, OP(b, a)); \
} \
env->vstart = 0; \
/* mask destination register are always tail- \
* agnostic \
*/ \
/* set tail elements to 1s */ \
if (vta_all_1s) { \
for (; i < total_elems; i++) { \
vext_set_elem_mask(vd, i, 1); \
} \
} \
}
#define DO_NAND(N, M) (!(N & M))
@ -4793,6 +4804,8 @@ static void vmsetm(void *vd, void *v0, void *vs2, CPURISCVState *env,
{
uint32_t vm = vext_vm(desc);
uint32_t vl = env->vl;
uint32_t total_elems = env_archcpu(env)->cfg.vlen;
uint32_t vta_all_1s = vext_vta_all_1s(desc);
int i;
bool first_mask_bit = false;
@ -4821,6 +4834,13 @@ static void vmsetm(void *vd, void *v0, void *vs2, CPURISCVState *env,
}
}
env->vstart = 0;
/* mask destination register are always tail-agnostic */
/* set tail elements to 1s */
if (vta_all_1s) {
for (; i < total_elems; i++) {
vext_set_elem_mask(vd, i, 1);
}
}
}
void HELPER(vmsbf_m)(void *vd, void *v0, void *vs2, CPURISCVState *env,
@ -4848,6 +4868,9 @@ void HELPER(NAME)(void *vd, void *v0, void *vs2, CPURISCVState *env, \
{ \
uint32_t vm = vext_vm(desc); \
uint32_t vl = env->vl; \
uint32_t esz = sizeof(ETYPE); \
uint32_t total_elems = vext_get_total_elems(env, desc, esz); \
uint32_t vta = vext_vta(desc); \
uint32_t sum = 0; \
int i; \
\
@ -4861,6 +4884,8 @@ void HELPER(NAME)(void *vd, void *v0, void *vs2, CPURISCVState *env, \
} \
} \
env->vstart = 0; \
/* set tail elements to 1s */ \
vext_set_elems_1s(vd, vta, vl * esz, total_elems * esz); \
}
GEN_VEXT_VIOTA_M(viota_m_b, uint8_t, H1)
@ -4874,6 +4899,9 @@ void HELPER(NAME)(void *vd, void *v0, CPURISCVState *env, uint32_t desc) \
{ \
uint32_t vm = vext_vm(desc); \
uint32_t vl = env->vl; \
uint32_t esz = sizeof(ETYPE); \
uint32_t total_elems = vext_get_total_elems(env, desc, esz); \
uint32_t vta = vext_vta(desc); \
int i; \
\
for (i = env->vstart; i < vl; i++) { \
@ -4883,6 +4911,8 @@ void HELPER(NAME)(void *vd, void *v0, CPURISCVState *env, uint32_t desc) \
*((ETYPE *)vd + H(i)) = i; \
} \
env->vstart = 0; \
/* set tail elements to 1s */ \
vext_set_elems_1s(vd, vta, vl * esz, total_elems * esz); \
}
GEN_VEXT_VID_V(vid_v_b, uint8_t, H1)