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target/riscv: rvv-1.0: integer add-with-carry/subtract-with-borrow

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* Only do carry-in or borrow-in if is masked (vm=0).
* Remove clear function from helper functions as the tail elements
  are unchanged in RVV 1.0.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-44-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Frank Chang 2021-12-10 15:56:29 +08:00 • committed by Alistair Francis
parent a75ae09f2a
commit bb45485ad1
3 changed files with 17 additions and 26 deletions
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21
target/riscv/vector_helper.c
View file

@ -944,7 +944,7 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2, \
for (i = 0; i < vl; i++) { \
ETYPE s1 = *((ETYPE *)vs1 + H(i)); \
ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
uint8_t carry = vext_elem_mask(v0, i); \
ETYPE carry = vext_elem_mask(v0, i); \
\
*((ETYPE *)vd + H(i)) = DO_OP(s2, s1, carry); \
} \
@ -969,7 +969,7 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1, void *vs2, \
\
for (i = 0; i < vl; i++) { \
ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
uint8_t carry = vext_elem_mask(v0, i); \
ETYPE carry = vext_elem_mask(v0, i); \
\
*((ETYPE *)vd + H(i)) = DO_OP(s2, (ETYPE)(target_long)s1, carry);\
} \
@ -994,20 +994,15 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2, \
CPURISCVState *env, uint32_t desc) \
{ \
uint32_t vl = env->vl; \
uint32_t vlmax = vext_max_elems(desc, \
ctzl(sizeof(ETYPE))); \
uint32_t vm = vext_vm(desc); \
uint32_t i; \
\
for (i = 0; i < vl; i++) { \
ETYPE s1 = *((ETYPE *)vs1 + H(i)); \
ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
uint8_t carry = vext_elem_mask(v0, i); \
\
ETYPE carry = !vm && vext_elem_mask(v0, i); \
vext_set_elem_mask(vd, i, DO_OP(s2, s1, carry)); \
} \
for (; i < vlmax; i++) { \
vext_set_elem_mask(vd, i, 0); \
} \
}
GEN_VEXT_VMADC_VVM(vmadc_vvm_b, uint8_t, H1, DO_MADC)
@ -1025,19 +1020,15 @@ void HELPER(NAME)(void *vd, void *v0, target_ulong s1, \
void *vs2, CPURISCVState *env, uint32_t desc) \
{ \
uint32_t vl = env->vl; \
uint32_t vlmax = vext_max_elems(desc, ctzl(sizeof(ETYPE))); \
uint32_t vm = vext_vm(desc); \
uint32_t i; \
\
for (i = 0; i < vl; i++) { \
ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
uint8_t carry = vext_elem_mask(v0, i); \
\
ETYPE carry = !vm && vext_elem_mask(v0, i); \
vext_set_elem_mask(vd, i, \
DO_OP(s2, (ETYPE)(target_long)s1, carry)); \
} \
for (; i < vlmax; i++) { \
vext_set_elem_mask(vd, i, 0); \
} \
}
GEN_VEXT_VMADC_VXM(vmadc_vxm_b, uint8_t, H1, DO_MADC)