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[PATCH v6 24/61] target/riscv: vector single-width saturating add and su
From: |
LIU Zhiwei |
Subject: |
[PATCH v6 24/61] target/riscv: vector single-width saturating add and subtract |
Date: |
Tue, 17 Mar 2020 23:06:16 +0800 |
Signed-off-by: LIU Zhiwei <address@hidden>
---
target/riscv/helper.h | 33 ++
target/riscv/insn32.decode | 10 +
target/riscv/insn_trans/trans_rvv.inc.c | 16 +
target/riscv/vector_helper.c | 389 ++++++++++++++++++++++++
4 files changed, 448 insertions(+)
diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index f378db9cbf..fd1c184852 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -682,3 +682,36 @@ DEF_HELPER_4(vmv_v_x_b, void, ptr, i64, env, i32)
DEF_HELPER_4(vmv_v_x_h, void, ptr, i64, env, i32)
DEF_HELPER_4(vmv_v_x_w, void, ptr, i64, env, i32)
DEF_HELPER_4(vmv_v_x_d, void, ptr, i64, env, i32)
+
+DEF_HELPER_6(vsaddu_vv_b, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vsaddu_vv_h, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vsaddu_vv_w, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vsaddu_vv_d, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vsadd_vv_b, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vsadd_vv_h, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vsadd_vv_w, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vsadd_vv_d, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vssubu_vv_b, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vssubu_vv_h, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vssubu_vv_w, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vssubu_vv_d, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vssub_vv_b, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vssub_vv_h, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vssub_vv_w, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vssub_vv_d, void, ptr, ptr, ptr, ptr, env, i32)
+DEF_HELPER_6(vsaddu_vx_b, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vsaddu_vx_h, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vsaddu_vx_w, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vsaddu_vx_d, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vsadd_vx_b, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vsadd_vx_h, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vsadd_vx_w, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vsadd_vx_d, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vssubu_vx_b, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vssubu_vx_h, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vssubu_vx_w, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vssubu_vx_d, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vssub_vx_b, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vssub_vx_h, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vssub_vx_w, void, ptr, ptr, tl, ptr, env, i32)
+DEF_HELPER_6(vssub_vx_d, void, ptr, ptr, tl, ptr, env, i32)
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index adb76956c9..c9a4050adc 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -407,6 +407,16 @@ vmv_v_i 010111 1 00000 ..... 011 ..... 1010111 @r2
vmerge_vvm 010111 0 ..... ..... 000 ..... 1010111 @r_vm_0
vmerge_vxm 010111 0 ..... ..... 100 ..... 1010111 @r_vm_0
vmerge_vim 010111 0 ..... ..... 011 ..... 1010111 @r_vm_0
+vsaddu_vv 100000 . ..... ..... 000 ..... 1010111 @r_vm
+vsaddu_vx 100000 . ..... ..... 100 ..... 1010111 @r_vm
+vsaddu_vi 100000 . ..... ..... 011 ..... 1010111 @r_vm
+vsadd_vv 100001 . ..... ..... 000 ..... 1010111 @r_vm
+vsadd_vx 100001 . ..... ..... 100 ..... 1010111 @r_vm
+vsadd_vi 100001 . ..... ..... 011 ..... 1010111 @r_vm
+vssubu_vv 100010 . ..... ..... 000 ..... 1010111 @r_vm
+vssubu_vx 100010 . ..... ..... 100 ..... 1010111 @r_vm
+vssub_vv 100011 . ..... ..... 000 ..... 1010111 @r_vm
+vssub_vx 100011 . ..... ..... 100 ..... 1010111 @r_vm
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 42ef59364f..dd1a508a51 100644
--- a/target/riscv/insn_trans/trans_rvv.inc.c
+++ b/target/riscv/insn_trans/trans_rvv.inc.c
@@ -1620,3 +1620,19 @@ static bool trans_vmv_v_i(DisasContext *s, arg_vmv_v_i
*a)
GEN_OPIVV_TRANS(vmerge_vvm, opivv_vadc_check)
GEN_OPIVX_TRANS(vmerge_vxm, opivx_vadc_check)
GEN_OPIVI_TRANS(vmerge_vim, 0, vmerge_vxm, opivx_vadc_check)
+
+/*
+ *** Vector Fixed-Point Arithmetic Instructions
+ */
+
+/* Vector Single-Width Saturating Add and Subtract */
+GEN_OPIVV_TRANS(vsaddu_vv, opivv_check)
+GEN_OPIVV_TRANS(vsadd_vv, opivv_check)
+GEN_OPIVV_TRANS(vssubu_vv, opivv_check)
+GEN_OPIVV_TRANS(vssub_vv, opivv_check)
+GEN_OPIVX_TRANS(vsaddu_vx, opivx_check)
+GEN_OPIVX_TRANS(vsadd_vx, opivx_check)
+GEN_OPIVX_TRANS(vssubu_vx, opivx_check)
+GEN_OPIVX_TRANS(vssub_vx, opivx_check)
+GEN_OPIVI_TRANS(vsaddu_vi, 1, vsaddu_vx, opivx_check)
+GEN_OPIVI_TRANS(vsadd_vi, 0, vsadd_vx, opivx_check)
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index e52a556484..b17cac7fd4 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -2099,3 +2099,392 @@ GEN_VEXT_VMERGE_VX(vmerge_vxm_b, int8_t, H1, clearb)
GEN_VEXT_VMERGE_VX(vmerge_vxm_h, int16_t, H2, clearh)
GEN_VEXT_VMERGE_VX(vmerge_vxm_w, int32_t, H4, clearl)
GEN_VEXT_VMERGE_VX(vmerge_vxm_d, int64_t, H8, clearq)
+
+/*
+ *** Vector Fixed-Point Arithmetic Instructions
+ */
+
+/* Vector Single-Width Saturating Add and Subtract */
+
+/*
+ * As fixed point instructions probably have round mode and saturation,
+ * define common macros for fixed point here.
+ */
+typedef void opivv2_rm_fn(void *vd, void *vs1, void *vs2, int i,
+ CPURISCVState *env, int vxrm);
+
+#define OPIVV2_RM(NAME, TD, T1, T2, TX1, TX2, HD, HS1, HS2, OP) \
+static inline void \
+do_##NAME(void *vd, void *vs1, void *vs2, int i, \
+ CPURISCVState *env, int vxrm) \
+{ \
+ TX1 s1 = *((T1 *)vs1 + HS1(i)); \
+ TX2 s2 = *((T2 *)vs2 + HS2(i)); \
+ *((TD *)vd + HD(i)) = OP(env, vxrm, s2, s1); \
+}
+
+static inline void
+vext_vv_rm_1(void *vd, void *v0, void *vs1, void *vs2,
+ CPURISCVState *env,
+ uint32_t vl, uint32_t vm, uint32_t mlen, int vxrm,
+ opivv2_rm_fn *fn)
+{
+ for (uint32_t i = 0; i < vl; i++) {
+ if (!vm && !vext_elem_mask(v0, mlen, i)) {
+ continue;
+ }
+ fn(vd, vs1, vs2, i, env, vxrm);
+ }
+}
+
+static inline void
+vext_vv_rm_2(void *vd, void *v0, void *vs1, void *vs2,
+ CPURISCVState *env,
+ uint32_t desc, uint32_t esz, uint32_t dsz,
+ opivv2_rm_fn *fn, clear_fn *clearfn)
+{
+ uint32_t vlmax = vext_maxsz(desc) / esz;
+ uint32_t mlen = vext_mlen(desc);
+ uint32_t vm = vext_vm(desc);
+ uint32_t vl = env->vl;
+
+ if (vl == 0) {
+ return;
+ }
+
+ switch (env->vxrm) {
+ case 0: /* rnu */
+ vext_vv_rm_1(vd, v0, vs1, vs2,
+ env, vl, vm, mlen, 0, fn);
+ break;
+ case 1: /* rne */
+ vext_vv_rm_1(vd, v0, vs1, vs2,
+ env, vl, vm, mlen, 1, fn);
+ break;
+ case 2: /* rdn */
+ vext_vv_rm_1(vd, v0, vs1, vs2,
+ env, vl, vm, mlen, 2, fn);
+ break;
+ default: /* rod */
+ vext_vv_rm_1(vd, v0, vs1, vs2,
+ env, vl, vm, mlen, 3, fn);
+ break;
+ }
+
+ clearfn(vd, vl, vl * dsz, vlmax * dsz);
+}
+
+/* generate helpers for fixed point instructions with OPIVV format */
+#define GEN_VEXT_VV_RM(NAME, ESZ, DSZ, CLEAR_FN) \
+void HELPER(NAME)(void *vd, void *v0, void *vs1, void *vs2, \
+ CPURISCVState *env, uint32_t desc) \
+{ \
+ vext_vv_rm_2(vd, v0, vs1, vs2, env, desc, ESZ, DSZ, \
+ do_##NAME, CLEAR_FN); \
+}
+
+static inline uint8_t saddu8(CPURISCVState *env, int vxrm, uint8_t a, uint8_t
b)
+{
+ uint8_t res = a + b;
+ if (res < a) {
+ res = UINT8_MAX;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+static inline uint16_t saddu16(CPURISCVState *env, int vxrm, uint16_t a,
+ uint16_t b)
+{
+ uint16_t res = a + b;
+ if (res < a) {
+ res = UINT16_MAX;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+static inline uint32_t saddu32(CPURISCVState *env, int vxrm, uint32_t a,
+ uint32_t b)
+{
+ uint32_t res = a + b;
+ if (res < a) {
+ res = UINT32_MAX;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+static inline uint64_t saddu64(CPURISCVState *env, int vxrm, uint64_t a,
+ uint64_t b)
+{
+ uint64_t res = a + b;
+ if (res < a) {
+ res = UINT64_MAX;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+RVVCALL(OPIVV2_RM, vsaddu_vv_b, OP_UUU_B, H1, H1, H1, saddu8)
+RVVCALL(OPIVV2_RM, vsaddu_vv_h, OP_UUU_H, H2, H2, H2, saddu16)
+RVVCALL(OPIVV2_RM, vsaddu_vv_w, OP_UUU_W, H4, H4, H4, saddu32)
+RVVCALL(OPIVV2_RM, vsaddu_vv_d, OP_UUU_D, H8, H8, H8, saddu64)
+GEN_VEXT_VV_RM(vsaddu_vv_b, 1, 1, clearb)
+GEN_VEXT_VV_RM(vsaddu_vv_h, 2, 2, clearh)
+GEN_VEXT_VV_RM(vsaddu_vv_w, 4, 4, clearl)
+GEN_VEXT_VV_RM(vsaddu_vv_d, 8, 8, clearq)
+
+typedef void opivx2_rm_fn(void *vd, target_long s1, void *vs2, int i,
+ CPURISCVState *env, int vxrm);
+
+#define OPIVX2_RM(NAME, TD, T1, T2, TX1, TX2, HD, HS2, OP) \
+static inline void \
+do_##NAME(void *vd, target_long s1, void *vs2, int i, \
+ CPURISCVState *env, int vxrm) \
+{ \
+ TX2 s2 = *((T2 *)vs2 + HS2(i)); \
+ *((TD *)vd + HD(i)) = OP(env, vxrm, s2, (TX1)(T1)s1); \
+}
+
+static inline void
+vext_vx_rm_1(void *vd, void *v0, target_long s1, void *vs2,
+ CPURISCVState *env,
+ uint32_t vl, uint32_t vm, uint32_t mlen, int vxrm,
+ opivx2_rm_fn *fn)
+{
+ for (uint32_t i = 0; i < vl; i++) {
+ if (!vm && !vext_elem_mask(v0, mlen, i)) {
+ continue;
+ }
+ fn(vd, s1, vs2, i, env, vxrm);
+ }
+}
+
+static inline void
+vext_vx_rm_2(void *vd, void *v0, target_long s1, void *vs2,
+ CPURISCVState *env,
+ uint32_t desc, uint32_t esz, uint32_t dsz,
+ opivx2_rm_fn *fn, clear_fn *clearfn)
+{
+ uint32_t vlmax = vext_maxsz(desc) / esz;
+ uint32_t mlen = vext_mlen(desc);
+ uint32_t vm = vext_vm(desc);
+ uint32_t vl = env->vl;
+
+ if (vl == 0) {
+ return;
+ }
+
+ switch (env->vxrm) {
+ case 0: /* rnu */
+ vext_vx_rm_1(vd, v0, s1, vs2,
+ env, vl, vm, mlen, 0, fn);
+ break;
+ case 1: /* rne */
+ vext_vx_rm_1(vd, v0, s1, vs2,
+ env, vl, vm, mlen, 1, fn);
+ break;
+ case 2: /* rdn */
+ vext_vx_rm_1(vd, v0, s1, vs2,
+ env, vl, vm, mlen, 2, fn);
+ break;
+ default: /* rod */
+ vext_vx_rm_1(vd, v0, s1, vs2,
+ env, vl, vm, mlen, 3, fn);
+ break;
+ }
+
+ clearfn(vd, vl, vl * dsz, vlmax * dsz);
+}
+
+/* generate helpers for fixed point instructions with OPIVX format */
+#define GEN_VEXT_VX_RM(NAME, ESZ, DSZ, CLEAR_FN) \
+void HELPER(NAME)(void *vd, void *v0, target_ulong s1, \
+ void *vs2, CPURISCVState *env, uint32_t desc) \
+{ \
+ vext_vx_rm_2(vd, v0, s1, vs2, env, desc, ESZ, DSZ, \
+ do_##NAME, CLEAR_FN); \
+}
+
+RVVCALL(OPIVX2_RM, vsaddu_vx_b, OP_UUU_B, H1, H1, saddu8)
+RVVCALL(OPIVX2_RM, vsaddu_vx_h, OP_UUU_H, H2, H2, saddu16)
+RVVCALL(OPIVX2_RM, vsaddu_vx_w, OP_UUU_W, H4, H4, saddu32)
+RVVCALL(OPIVX2_RM, vsaddu_vx_d, OP_UUU_D, H8, H8, saddu64)
+GEN_VEXT_VX_RM(vsaddu_vx_b, 1, 1, clearb)
+GEN_VEXT_VX_RM(vsaddu_vx_h, 2, 2, clearh)
+GEN_VEXT_VX_RM(vsaddu_vx_w, 4, 4, clearl)
+GEN_VEXT_VX_RM(vsaddu_vx_d, 8, 8, clearq)
+
+static inline int8_t sadd8(CPURISCVState *env, int vxrm, int8_t a, int8_t b)
+{
+ int8_t res = a + b;
+ if ((res ^ a) & (res ^ b) & INT8_MIN) {
+ res = a > 0 ? INT8_MAX : INT8_MIN;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+static inline int16_t sadd16(CPURISCVState *env, int vxrm, int16_t a, int16_t
b)
+{
+ int16_t res = a + b;
+ if ((res ^ a) & (res ^ b) & INT16_MIN) {
+ res = a > 0 ? INT16_MAX : INT16_MIN;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+static inline int32_t sadd32(CPURISCVState *env, int vxrm, int32_t a, int32_t
b)
+{
+ int32_t res = a + b;
+ if ((res ^ a) & (res ^ b) & INT32_MIN) {
+ res = a > 0 ? INT32_MAX : INT32_MIN;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+static inline int64_t sadd64(CPURISCVState *env, int vxrm, int64_t a, int64_t
b)
+{
+ int64_t res = a + b;
+ if ((res ^ a) & (res ^ b) & INT64_MIN) {
+ res = a > 0 ? INT64_MAX : INT64_MIN;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+RVVCALL(OPIVV2_RM, vsadd_vv_b, OP_SSS_B, H1, H1, H1, sadd8)
+RVVCALL(OPIVV2_RM, vsadd_vv_h, OP_SSS_H, H2, H2, H2, sadd16)
+RVVCALL(OPIVV2_RM, vsadd_vv_w, OP_SSS_W, H4, H4, H4, sadd32)
+RVVCALL(OPIVV2_RM, vsadd_vv_d, OP_SSS_D, H8, H8, H8, sadd64)
+GEN_VEXT_VV_RM(vsadd_vv_b, 1, 1, clearb)
+GEN_VEXT_VV_RM(vsadd_vv_h, 2, 2, clearh)
+GEN_VEXT_VV_RM(vsadd_vv_w, 4, 4, clearl)
+GEN_VEXT_VV_RM(vsadd_vv_d, 8, 8, clearq)
+
+RVVCALL(OPIVX2_RM, vsadd_vx_b, OP_SSS_B, H1, H1, sadd8)
+RVVCALL(OPIVX2_RM, vsadd_vx_h, OP_SSS_H, H2, H2, sadd16)
+RVVCALL(OPIVX2_RM, vsadd_vx_w, OP_SSS_W, H4, H4, sadd32)
+RVVCALL(OPIVX2_RM, vsadd_vx_d, OP_SSS_D, H8, H8, sadd64)
+GEN_VEXT_VX_RM(vsadd_vx_b, 1, 1, clearb)
+GEN_VEXT_VX_RM(vsadd_vx_h, 2, 2, clearh)
+GEN_VEXT_VX_RM(vsadd_vx_w, 4, 4, clearl)
+GEN_VEXT_VX_RM(vsadd_vx_d, 8, 8, clearq)
+
+static inline uint8_t ssubu8(CPURISCVState *env, int vxrm, uint8_t a, uint8_t
b)
+{
+ uint8_t res = a - b;
+ if (res > a) {
+ res = 0;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+static inline uint16_t ssubu16(CPURISCVState *env, int vxrm, uint16_t a,
+ uint16_t b)
+{
+ uint16_t res = a - b;
+ if (res > a) {
+ res = 0;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+static inline uint32_t ssubu32(CPURISCVState *env, int vxrm, uint32_t a,
+ uint32_t b)
+{
+ uint32_t res = a - b;
+ if (res > a) {
+ res = 0;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+static inline uint64_t ssubu64(CPURISCVState *env, int vxrm, uint64_t a,
+ uint64_t b)
+{
+ uint64_t res = a - b;
+ if (res > a) {
+ res = 0;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+RVVCALL(OPIVV2_RM, vssubu_vv_b, OP_UUU_B, H1, H1, H1, ssubu8)
+RVVCALL(OPIVV2_RM, vssubu_vv_h, OP_UUU_H, H2, H2, H2, ssubu16)
+RVVCALL(OPIVV2_RM, vssubu_vv_w, OP_UUU_W, H4, H4, H4, ssubu32)
+RVVCALL(OPIVV2_RM, vssubu_vv_d, OP_UUU_D, H8, H8, H8, ssubu64)
+GEN_VEXT_VV_RM(vssubu_vv_b, 1, 1, clearb)
+GEN_VEXT_VV_RM(vssubu_vv_h, 2, 2, clearh)
+GEN_VEXT_VV_RM(vssubu_vv_w, 4, 4, clearl)
+GEN_VEXT_VV_RM(vssubu_vv_d, 8, 8, clearq)
+
+RVVCALL(OPIVX2_RM, vssubu_vx_b, OP_UUU_B, H1, H1, ssubu8)
+RVVCALL(OPIVX2_RM, vssubu_vx_h, OP_UUU_H, H2, H2, ssubu16)
+RVVCALL(OPIVX2_RM, vssubu_vx_w, OP_UUU_W, H4, H4, ssubu32)
+RVVCALL(OPIVX2_RM, vssubu_vx_d, OP_UUU_D, H8, H8, ssubu64)
+GEN_VEXT_VX_RM(vssubu_vx_b, 1, 1, clearb)
+GEN_VEXT_VX_RM(vssubu_vx_h, 2, 2, clearh)
+GEN_VEXT_VX_RM(vssubu_vx_w, 4, 4, clearl)
+GEN_VEXT_VX_RM(vssubu_vx_d, 8, 8, clearq)
+
+static inline int8_t ssub8(CPURISCVState *env, int vxrm, int8_t a, int8_t b)
+{
+ int8_t res = a - b;
+ if ((res ^ a) & (a ^ b) & INT8_MIN) {
+ res = a > 0 ? INT8_MAX : INT8_MIN;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+static inline int16_t ssub16(CPURISCVState *env, int vxrm, int16_t a, int16_t
b)
+{
+ int16_t res = a - b;
+ if ((res ^ a) & (a ^ b) & INT16_MIN) {
+ res = a > 0 ? INT16_MAX : INT16_MIN;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+static inline int32_t ssub32(CPURISCVState *env, int vxrm, int32_t a, int32_t
b)
+{
+ int32_t res = a - b;
+ if ((res ^ a) & (a ^ b) & INT32_MIN) {
+ res = a > 0 ? INT32_MAX : INT32_MIN;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+static inline int64_t ssub64(CPURISCVState *env, int vxrm, int64_t a, int64_t
b)
+{
+ int64_t res = a - b;
+ if ((res ^ a) & (a ^ b) & INT64_MIN) {
+ res = a > 0 ? INT64_MAX : INT64_MIN;
+ env->vxsat = 0x1;
+ }
+ return res;
+}
+
+RVVCALL(OPIVV2_RM, vssub_vv_b, OP_SSS_B, H1, H1, H1, ssub8)
+RVVCALL(OPIVV2_RM, vssub_vv_h, OP_SSS_H, H2, H2, H2, ssub16)
+RVVCALL(OPIVV2_RM, vssub_vv_w, OP_SSS_W, H4, H4, H4, ssub32)
+RVVCALL(OPIVV2_RM, vssub_vv_d, OP_SSS_D, H8, H8, H8, ssub64)
+GEN_VEXT_VV_RM(vssub_vv_b, 1, 1, clearb)
+GEN_VEXT_VV_RM(vssub_vv_h, 2, 2, clearh)
+GEN_VEXT_VV_RM(vssub_vv_w, 4, 4, clearl)
+GEN_VEXT_VV_RM(vssub_vv_d, 8, 8, clearq)
+
+RVVCALL(OPIVX2_RM, vssub_vx_b, OP_SSS_B, H1, H1, ssub8)
+RVVCALL(OPIVX2_RM, vssub_vx_h, OP_SSS_H, H2, H2, ssub16)
+RVVCALL(OPIVX2_RM, vssub_vx_w, OP_SSS_W, H4, H4, ssub32)
+RVVCALL(OPIVX2_RM, vssub_vx_d, OP_SSS_D, H8, H8, ssub64)
+GEN_VEXT_VX_RM(vssub_vx_b, 1, 1, clearb)
+GEN_VEXT_VX_RM(vssub_vx_h, 2, 2, clearh)
+GEN_VEXT_VX_RM(vssub_vx_w, 4, 4, clearl)
+GEN_VEXT_VX_RM(vssub_vx_d, 8, 8, clearq)
--
2.23.0
- Re: [PATCH v6 19/61] target/riscv: vector integer divide instructions, (continued)
- [PATCH v6 20/61] target/riscv: vector widening integer multiply instructions, LIU Zhiwei, 2020/03/17
- [PATCH v6 21/61] target/riscv: vector single-width integer multiply-add instructions, LIU Zhiwei, 2020/03/17
- [PATCH v6 22/61] target/riscv: vector widening integer multiply-add instructions, LIU Zhiwei, 2020/03/17
- [PATCH v6 23/61] target/riscv: vector integer merge and move instructions, LIU Zhiwei, 2020/03/17
- [PATCH v6 24/61] target/riscv: vector single-width saturating add and subtract,
LIU Zhiwei <=
- [PATCH v6 25/61] target/riscv: vector single-width averaging add and subtract, LIU Zhiwei, 2020/03/17
[PATCH v6 26/61] target/riscv: vector single-width fractional multiply with rounding and saturation, LIU Zhiwei, 2020/03/17