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target/riscv: vector integer add-with-carry / subtract-with-borrow instructions 

Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200701152549.1218-13-zhiwei_liu@c-sky.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
LIU Zhiwei 2020-07-01 23:25:00 +08:00 committed by Alistair Francis
parent 8fcdf77630
commit 3a6f8f68ad
4 changed files with 294 additions and 0 deletions
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33
target/riscv/helper.h
View File

@ -349,3 +349,36 @@ DEF_HELPER_6(vwadd_wx_w, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vwsub_wx_b, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vwsub_wx_h, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vwsub_wx_w, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vadc_vvm_b, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vadc_vvm_h, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vadc_vvm_w, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vadc_vvm_d, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vsbc_vvm_b, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vsbc_vvm_h, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vsbc_vvm_w, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vsbc_vvm_d, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vmadc_vvm_b, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vmadc_vvm_h, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vmadc_vvm_w, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vmadc_vvm_d, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vmsbc_vvm_b, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vmsbc_vvm_h, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vmsbc_vvm_w, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vmsbc_vvm_d, void, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_6(vadc_vxm_b, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vadc_vxm_h, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vadc_vxm_w, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vadc_vxm_d, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vsbc_vxm_b, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vsbc_vxm_h, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vsbc_vxm_w, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vsbc_vxm_d, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vmadc_vxm_b, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vmadc_vxm_h, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vmadc_vxm_w, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vmadc_vxm_d, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vmsbc_vxm_b, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vmsbc_vxm_h, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vmsbc_vxm_w, void, ptr, ptr, tl, ptr, env, i32)
DEF_HELPER_6(vmsbc_vxm_d, void, ptr, ptr, tl, ptr, env, i32)

11
target/riscv/insn32.decode
View File

@ -70,6 +70,7 @@
@r2_nfvm ... ... vm:1 ..... ..... ... ..... ....... &r2nfvm %nf %rs1 %rd
@r_nfvm ... ... vm:1 ..... ..... ... ..... ....... &rnfvm %nf %rs2 %rs1 %rd
@r_vm ...... vm:1 ..... ..... ... ..... ....... &rmrr %rs2 %rs1 %rd
@r_vm_1 ...... . ..... ..... ... ..... ....... &rmrr vm=1 %rs2 %rs1 %rd
@r_wdvm ..... wd:1 vm:1 ..... ..... ... ..... ....... &rwdvm %rs2 %rs1 %rd
@r2_zimm . zimm:11 ..... ... ..... ....... %rs1 %rd
@ -302,6 +303,16 @@ 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
vsetvli 0 ........... ..... 111 ..... 1010111 @r2_zimm
vsetvl 1000000 ..... ..... 111 ..... 1010111 @r

113
target/riscv/insn_trans/trans_rvv.inc.c
View File

@ -1249,3 +1249,116 @@ GEN_OPIWX_WIDEN_TRANS(vwaddu_wx)
GEN_OPIWX_WIDEN_TRANS(vwadd_wx)
GEN_OPIWX_WIDEN_TRANS(vwsubu_wx)
GEN_OPIWX_WIDEN_TRANS(vwsub_wx)
/* Vector Integer Add-with-Carry / Subtract-with-Borrow Instructions */
/* OPIVV without GVEC IR */
#define GEN_OPIVV_TRANS(NAME, CHECK) \
static bool trans_##NAME(DisasContext *s, arg_rmrr *a) \
{ \
if (CHECK(s, a)) { \
uint32_t data = 0; \
static gen_helper_gvec_4_ptr * const fns[4] = { \
gen_helper_##NAME##_b, gen_helper_##NAME##_h, \
gen_helper_##NAME##_w, gen_helper_##NAME##_d, \
}; \
TCGLabel *over = gen_new_label(); \
tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \
\
data = FIELD_DP32(data, VDATA, MLEN, s->mlen); \
data = FIELD_DP32(data, VDATA, VM, a->vm); \
data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \
tcg_gen_gvec_4_ptr(vreg_ofs(s, a->rd), vreg_ofs(s, 0), \
vreg_ofs(s, a->rs1), \
vreg_ofs(s, a->rs2), cpu_env, 0, \
s->vlen / 8, data, fns[s->sew]); \
gen_set_label(over); \
return true; \
} \
return false; \
}
/*
* For vadc and vsbc, an illegal instruction exception is raised if the
* destination vector register is v0 and LMUL > 1. (Section 12.3)
*/
static bool opivv_vadc_check(DisasContext *s, arg_rmrr *a)
{
return (vext_check_isa_ill(s) &&
vext_check_reg(s, a->rd, false) &&
vext_check_reg(s, a->rs2, false) &&
vext_check_reg(s, a->rs1, false) &&
((a->rd != 0) || (s->lmul == 0)));
}
GEN_OPIVV_TRANS(vadc_vvm, opivv_vadc_check)
GEN_OPIVV_TRANS(vsbc_vvm, opivv_vadc_check)
/*
* For vmadc and vmsbc, an illegal instruction exception is raised if the
* destination vector register overlaps a source vector register group.
*/
static bool opivv_vmadc_check(DisasContext *s, arg_rmrr *a)
{
return (vext_check_isa_ill(s) &&
vext_check_reg(s, a->rs2, false) &&
vext_check_reg(s, a->rs1, false) &&
vext_check_overlap_group(a->rd, 1, a->rs1, 1 << s->lmul) &&
vext_check_overlap_group(a->rd, 1, a->rs2, 1 << s->lmul));
}
GEN_OPIVV_TRANS(vmadc_vvm, opivv_vmadc_check)
GEN_OPIVV_TRANS(vmsbc_vvm, opivv_vmadc_check)
static bool opivx_vadc_check(DisasContext *s, arg_rmrr *a)
{
return (vext_check_isa_ill(s) &&
vext_check_reg(s, a->rd, false) &&
vext_check_reg(s, a->rs2, false) &&
((a->rd != 0) || (s->lmul == 0)));
}
/* OPIVX without GVEC IR */
#define GEN_OPIVX_TRANS(NAME, CHECK) \
static bool trans_##NAME(DisasContext *s, arg_rmrr *a) \
{ \
if (CHECK(s, a)) { \
static gen_helper_opivx * const fns[4] = { \
gen_helper_##NAME##_b, gen_helper_##NAME##_h, \
gen_helper_##NAME##_w, gen_helper_##NAME##_d, \
}; \
\
return opivx_trans(a->rd, a->rs1, a->rs2, a->vm, fns[s->sew], s);\
} \
return false; \
}
GEN_OPIVX_TRANS(vadc_vxm, opivx_vadc_check)
GEN_OPIVX_TRANS(vsbc_vxm, opivx_vadc_check)
static bool opivx_vmadc_check(DisasContext *s, arg_rmrr *a)
{
return (vext_check_isa_ill(s) &&
vext_check_reg(s, a->rs2, false) &&
vext_check_overlap_group(a->rd, 1, a->rs2, 1 << s->lmul));
}
GEN_OPIVX_TRANS(vmadc_vxm, opivx_vmadc_check)
GEN_OPIVX_TRANS(vmsbc_vxm, opivx_vmadc_check)
/* OPIVI without GVEC IR */
#define GEN_OPIVI_TRANS(NAME, ZX, OPIVX, CHECK) \
static bool trans_##NAME(DisasContext *s, arg_rmrr *a) \
{ \
if (CHECK(s, a)) { \
static gen_helper_opivx * const fns[4] = { \
gen_helper_##OPIVX##_b, gen_helper_##OPIVX##_h, \
gen_helper_##OPIVX##_w, gen_helper_##OPIVX##_d, \
}; \
return opivi_trans(a->rd, a->rs1, a->rs2, a->vm, \
fns[s->sew], s, ZX); \
} \
return false; \
}
GEN_OPIVI_TRANS(vadc_vim, 0, vadc_vxm, opivx_vadc_check)
GEN_OPIVI_TRANS(vmadc_vim, 0, vmadc_vxm, opivx_vmadc_check)

137
target/riscv/vector_helper.c
View File

@ -187,6 +187,14 @@ static void clearq(void *vd, uint32_t idx, uint32_t cnt, uint32_t tot)
vext_clear(cur, cnt, tot);
}
static inline void vext_set_elem_mask(void *v0, int mlen, int index,
uint8_t value)
{
int idx = (index * mlen) / 64;
int pos = (index * mlen) % 64;
uint64_t old = ((uint64_t *)v0)[idx];
((uint64_t *)v0)[idx] = deposit64(old, pos, mlen, value);
}
static inline int vext_elem_mask(void *v0, int mlen, int index)
{
@ -1128,3 +1136,132 @@ GEN_VEXT_VX(vwadd_wx_w, 4, 8, clearq)
GEN_VEXT_VX(vwsub_wx_b, 1, 2, clearh)
GEN_VEXT_VX(vwsub_wx_h, 2, 4, clearl)
GEN_VEXT_VX(vwsub_wx_w, 4, 8, clearq)
/* Vector Integer Add-with-Carry / Subtract-with-Borrow Instructions */
#define DO_VADC(N, M, C) (N + M + C)
#define DO_VSBC(N, M, C) (N - M - C)
#define GEN_VEXT_VADC_VVM(NAME, ETYPE, H, DO_OP, CLEAR_FN) \
void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2, \
CPURISCVState *env, uint32_t desc) \
{ \
uint32_t mlen = vext_mlen(desc); \
uint32_t vl = env->vl; \
uint32_t esz = sizeof(ETYPE); \
uint32_t vlmax = vext_maxsz(desc) / esz; \
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, mlen, i); \
\
*((ETYPE *)vd + H(i)) = DO_OP(s2, s1, carry); \
} \
CLEAR_FN(vd, vl, vl * esz, vlmax * esz); \
}
GEN_VEXT_VADC_VVM(vadc_vvm_b, uint8_t, H1, DO_VADC, clearb)
GEN_VEXT_VADC_VVM(vadc_vvm_h, uint16_t, H2, DO_VADC, clearh)
GEN_VEXT_VADC_VVM(vadc_vvm_w, uint32_t, H4, DO_VADC, clearl)
GEN_VEXT_VADC_VVM(vadc_vvm_d, uint64_t, H8, DO_VADC, clearq)
GEN_VEXT_VADC_VVM(vsbc_vvm_b, uint8_t, H1, DO_VSBC, clearb)
GEN_VEXT_VADC_VVM(vsbc_vvm_h, uint16_t, H2, DO_VSBC, clearh)
GEN_VEXT_VADC_VVM(vsbc_vvm_w, uint32_t, H4, DO_VSBC, clearl)
GEN_VEXT_VADC_VVM(vsbc_vvm_d, uint64_t, H8, DO_VSBC, clearq)
#define GEN_VEXT_VADC_VXM(NAME, ETYPE, H, DO_OP, CLEAR_FN) \
void HELPER(NAME)(void *vd, void *v0, target_ulong s1, void *vs2, \
CPURISCVState *env, uint32_t desc) \
{ \
uint32_t mlen = vext_mlen(desc); \
uint32_t vl = env->vl; \
uint32_t esz = sizeof(ETYPE); \
uint32_t vlmax = vext_maxsz(desc) / esz; \
uint32_t i; \
\
for (i = 0; i < vl; i++) { \
ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
uint8_t carry = vext_elem_mask(v0, mlen, i); \
\
*((ETYPE *)vd + H(i)) = DO_OP(s2, (ETYPE)(target_long)s1, carry);\
} \
CLEAR_FN(vd, vl, vl * esz, vlmax * esz); \
}
GEN_VEXT_VADC_VXM(vadc_vxm_b, uint8_t, H1, DO_VADC, clearb)
GEN_VEXT_VADC_VXM(vadc_vxm_h, uint16_t, H2, DO_VADC, clearh)
GEN_VEXT_VADC_VXM(vadc_vxm_w, uint32_t, H4, DO_VADC, clearl)
GEN_VEXT_VADC_VXM(vadc_vxm_d, uint64_t, H8, DO_VADC, clearq)
GEN_VEXT_VADC_VXM(vsbc_vxm_b, uint8_t, H1, DO_VSBC, clearb)
GEN_VEXT_VADC_VXM(vsbc_vxm_h, uint16_t, H2, DO_VSBC, clearh)
GEN_VEXT_VADC_VXM(vsbc_vxm_w, uint32_t, H4, DO_VSBC, clearl)
GEN_VEXT_VADC_VXM(vsbc_vxm_d, uint64_t, H8, DO_VSBC, clearq)
#define DO_MADC(N, M, C) (C ? (__typeof(N))(N + M + 1) <= N : \
(__typeof(N))(N + M) < N)
#define DO_MSBC(N, M, C) (C ? N <= M : N < M)
#define GEN_VEXT_VMADC_VVM(NAME, ETYPE, H, DO_OP) \
void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2, \
CPURISCVState *env, uint32_t desc) \
{ \
uint32_t mlen = vext_mlen(desc); \
uint32_t vl = env->vl; \
uint32_t vlmax = vext_maxsz(desc) / sizeof(ETYPE); \
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, mlen, i); \
\
vext_set_elem_mask(vd, mlen, i, DO_OP(s2, s1, carry));\
} \
for (; i < vlmax; i++) { \
vext_set_elem_mask(vd, mlen, i, 0); \
} \
}
GEN_VEXT_VMADC_VVM(vmadc_vvm_b, uint8_t, H1, DO_MADC)
GEN_VEXT_VMADC_VVM(vmadc_vvm_h, uint16_t, H2, DO_MADC)
GEN_VEXT_VMADC_VVM(vmadc_vvm_w, uint32_t, H4, DO_MADC)
GEN_VEXT_VMADC_VVM(vmadc_vvm_d, uint64_t, H8, DO_MADC)
GEN_VEXT_VMADC_VVM(vmsbc_vvm_b, uint8_t, H1, DO_MSBC)
GEN_VEXT_VMADC_VVM(vmsbc_vvm_h, uint16_t, H2, DO_MSBC)
GEN_VEXT_VMADC_VVM(vmsbc_vvm_w, uint32_t, H4, DO_MSBC)
GEN_VEXT_VMADC_VVM(vmsbc_vvm_d, uint64_t, H8, DO_MSBC)
#define GEN_VEXT_VMADC_VXM(NAME, ETYPE, H, DO_OP) \
void HELPER(NAME)(void *vd, void *v0, target_ulong s1, \
void *vs2, CPURISCVState *env, uint32_t desc) \
{ \
uint32_t mlen = vext_mlen(desc); \
uint32_t vl = env->vl; \
uint32_t vlmax = vext_maxsz(desc) / sizeof(ETYPE); \
uint32_t i; \
\
for (i = 0; i < vl; i++) { \
ETYPE s2 = *((ETYPE *)vs2 + H(i)); \
uint8_t carry = vext_elem_mask(v0, mlen, i); \
\
vext_set_elem_mask(vd, mlen, i, \
DO_OP(s2, (ETYPE)(target_long)s1, carry)); \
} \
for (; i < vlmax; i++) { \
vext_set_elem_mask(vd, mlen, i, 0); \
} \
}
GEN_VEXT_VMADC_VXM(vmadc_vxm_b, uint8_t, H1, DO_MADC)
GEN_VEXT_VMADC_VXM(vmadc_vxm_h, uint16_t, H2, DO_MADC)
GEN_VEXT_VMADC_VXM(vmadc_vxm_w, uint32_t, H4, DO_MADC)
GEN_VEXT_VMADC_VXM(vmadc_vxm_d, uint64_t, H8, DO_MADC)
GEN_VEXT_VMADC_VXM(vmsbc_vxm_b, uint8_t, H1, DO_MSBC)
GEN_VEXT_VMADC_VXM(vmsbc_vxm_h, uint16_t, H2, DO_MSBC)
GEN_VEXT_VMADC_VXM(vmsbc_vxm_w, uint32_t, H4, DO_MSBC)
GEN_VEXT_VMADC_VXM(vmsbc_vxm_d, uint64_t, H8, DO_MSBC)