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target/riscv: rvv: Add tail agnostic for vector integer comparison instructions 

Compares write mask registers, and so always operate 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: <165449614532.19704.7000832880482980398-9@git.sr.ht>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
eopXD 2022-06-06 06:16:51 +00:00 committed by Alistair Francis
parent 7b1bff41c1
commit 38581e5c9a
1 changed files with 18 additions and 0 deletions
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18
target/riscv/vector_helper.c
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@ -1371,6 +1371,8 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2, \
{ \
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); \
uint32_t i; \
\
for (i = env->vstart; i < vl; i++) { \
@ -1382,6 +1384,13 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2, \
vext_set_elem_mask(vd, i, DO_OP(s2, s1)); \
} \
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); \
} \
} \
}
GEN_VEXT_CMP_VV(vmseq_vv_b, uint8_t, H1, DO_MSEQ)
@ -1420,6 +1429,8 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1, void *vs2, \
{ \
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); \
uint32_t i; \
\
for (i = env->vstart; i < vl; i++) { \
@ -1431,6 +1442,13 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1, void *vs2, \
DO_OP(s2, (ETYPE)(target_long)s1)); \
} \
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); \
} \
} \
}
GEN_VEXT_CMP_VX(vmseq_vx_b, uint8_t, H1, DO_MSEQ)