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[PATCH v6 12/61] target/riscv: vector integer add-with-carry / subtract-


From: LIU Zhiwei
Subject: [PATCH v6 12/61] target/riscv: vector integer add-with-carry / subtract-with-borrow instructions
Date: Tue, 17 Mar 2020 23:06:04 +0800

Signed-off-by: LIU Zhiwei <address@hidden>
---
 target/riscv/helper.h                   |  33 ++++++
 target/riscv/insn32.decode              |  11 ++
 target/riscv/insn_trans/trans_rvv.inc.c |  78 +++++++++++++
 target/riscv/vector_helper.c            | 148 ++++++++++++++++++++++++
 4 files changed, 270 insertions(+)

diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index 1256defb6c..72c733bf49 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -339,3 +339,36 @@ 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)
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 4bdbfd16fa..022c8ea18b 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -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
 
@@ -300,6 +301,16 @@ 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
diff --git a/target/riscv/insn_trans/trans_rvv.inc.c 
b/target/riscv/insn_trans/trans_rvv.inc.c
index 8f17faa3f3..4562d5f14f 100644
--- a/target/riscv/insn_trans/trans_rvv.inc.c
+++ b/target/riscv/insn_trans/trans_rvv.inc.c
@@ -1169,3 +1169,81 @@ 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,          \
+        };                                                         \
+        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]);           \
+        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)));
+}
+
+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)
+
+GEN_OPIVI_TRANS(vadc_vim, 0, vadc_vxm, opivx_vadc_check)
+GEN_OPIVI_TRANS(vmadc_vim, 0, vmadc_vxm, opivx_vmadc_check)
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index d0e6f12f43..9913dcbea2 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -186,6 +186,14 @@ 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)
 {
@@ -1087,3 +1095,143 @@ 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)
+
+#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;                                               \
+                                                              \
+    if (vl == 0) {                                            \
+        return;                                               \
+    }                                                         \
+    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;                                                          \
+                                                                         \
+    if (vl == 0) {                                                       \
+        return;                                                          \
+    }                                                                    \
+    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;                                               \
+                                                              \
+    if (vl == 0) {                                            \
+        return;                                               \
+    }                                                         \
+    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;                                                 \
+                                                                \
+    if (vl == 0) {                                              \
+        return;                                                 \
+    }                                                           \
+    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)
-- 
2.23.0




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