From: eopXD <yueh.ting.c...@gmail.com>
Compares write mask registers, and so always operate under a tail-
agnostic policy.
Signed-off-by: eop Chen <eop.c...@sifive.com>
Reviewed-by: Frank Chang <frank.ch...@sifive.com>
Reviewed-by: Weiwei Li <liwei...@iscas.ac.cn>
Acked-by: Alistair Francis <alistair.fran...@wdc.com>
Message-Id: <165449614532.19704.700083288048298039...@git.sr.ht>
Signed-off-by: Alistair Francis <alistair.fran...@wdc.com>
---
target/riscv/vector_helper.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index 056c2a1c7e..a64506bf02 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -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)
--
2.36.1
