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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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20
target/riscv/insn32.decode
View File

@ -378,16 +378,16 @@ vwsubu_wv 110110 . ..... ..... 010 ..... 1010111 @r_vm
vwsubu_wx 110110 . ..... ..... 110 ..... 1010111 @r_vm
vwsub_wv 110111 . ..... ..... 010 ..... 1010111 @r_vm
vwsub_wx 110111 . ..... ..... 110 ..... 1010111 @r_vm
vadc_vvm 010000 1 ..... ..... 000 ..... 1010111 @r_vm_1
vadc_vxm 010000 1 ..... ..... 100 ..... 1010111 @r_vm_1
vadc_vim 010000 1 ..... ..... 011 ..... 1010111 @r_vm_1
vmadc_vvm 010001 1 ..... ..... 000 ..... 1010111 @r_vm_1
vmadc_vxm 010001 1 ..... ..... 100 ..... 1010111 @r_vm_1
vmadc_vim 010001 1 ..... ..... 011 ..... 1010111 @r_vm_1
vsbc_vvm 010010 1 ..... ..... 000 ..... 1010111 @r_vm_1
vsbc_vxm 010010 1 ..... ..... 100 ..... 1010111 @r_vm_1
vmsbc_vvm 010011 1 ..... ..... 000 ..... 1010111 @r_vm_1
vmsbc_vxm 010011 1 ..... ..... 100 ..... 1010111 @r_vm_1
vadc_vvm 010000 0 ..... ..... 000 ..... 1010111 @r_vm_1
vadc_vxm 010000 0 ..... ..... 100 ..... 1010111 @r_vm_1
vadc_vim 010000 0 ..... ..... 011 ..... 1010111 @r_vm_1
vmadc_vvm 010001 . ..... ..... 000 ..... 1010111 @r_vm
vmadc_vxm 010001 . ..... ..... 100 ..... 1010111 @r_vm
vmadc_vim 010001 . ..... ..... 011 ..... 1010111 @r_vm
vsbc_vvm 010010 0 ..... ..... 000 ..... 1010111 @r_vm_1
vsbc_vxm 010010 0 ..... ..... 100 ..... 1010111 @r_vm_1
vmsbc_vvm 010011 . ..... ..... 000 ..... 1010111 @r_vm
vmsbc_vxm 010011 . ..... ..... 100 ..... 1010111 @r_vm
vand_vv 001001 . ..... ..... 000 ..... 1010111 @r_vm
vand_vx 001001 . ..... ..... 100 ..... 1010111 @r_vm
vand_vi 001001 . ..... ..... 011 ..... 1010111 @r_vm

2
target/riscv/insn_trans/trans_rvv.c.inc
View File

@ -1547,7 +1547,7 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr *a) \
/*
* For vadc and vsbc, an illegal instruction exception is raised if the
* destination vector register is v0 and LMUL > 1. (Section 12.3)
* destination vector register is v0 and LMUL > 1. (Section 12.4)
*/
static bool opivv_vadc_check(DisasContext *s, arg_rmrr *a)
{

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)