RISC-V: Support vfwnmacc/vfwmsac/vfwnmsac combine lowering

diff --git a/gcc/config/riscv/autovec-opt.md b/gcc/config/riscv/autovec-opt.md
index 1a1cef0eaa5..0c0ba685d6b 100644
--- a/gcc/config/riscv/autovec-opt.md
+++ b/gcc/config/riscv/autovec-opt.md
@@ -502,3 +502,185 @@ 
   }
   [(set_attr "type" "vfwmuladd")
    (set_attr "mode" "<V_DOUBLE_TRUNC>")])
+
+;; -------------------------------------------------------------------------
+;; ---- [FP] VFWNMSAC
+;; -------------------------------------------------------------------------
+;; Includes:
+;; - vfwnmsac.vv
+;; -------------------------------------------------------------------------
+
+;; Combine ext + ext + fnma ===> widen fnma.
+;; Most of circumstantces, LoopVectorizer will generate the following IR:
+;; vect__8.176_40 = (vector([2,2]) double) vect__7.175_41;
+;; vect__11.180_35 = (vector([2,2]) double) vect__10.179_36;
+;; vect__13.182_33 = .FNMA (vect__11.180_35, vect__8.176_40, vect__4.172_45);
+(define_insn_and_split "*double_widen_fnma<mode>"
+  [(set (match_operand:VWEXTF 0 "register_operand")
+	(fma:VWEXTF
+	  (neg:VWEXTF
+	    (float_extend:VWEXTF
+	      (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand")))
+	  (float_extend:VWEXTF
+	    (match_operand:<V_DOUBLE_TRUNC> 3 "register_operand"))
+	  (match_operand:VWEXTF 1 "register_operand")))]
+  "TARGET_VECTOR && can_create_pseudo_p ()"
+  "#"
+  "&& 1"
+  [(const_int 0)]
+  {
+    riscv_vector::emit_vlmax_fp_ternary_insn (code_for_pred_widen_mul_neg (PLUS, <MODE>mode),
+					      riscv_vector::RVV_WIDEN_TERNOP, operands);
+    DONE;
+  }
+  [(set_attr "type" "vfwmuladd")
+   (set_attr "mode" "<V_DOUBLE_TRUNC>")])
+
+;; This helps to match ext + fnma.
+(define_insn_and_split "*single_widen_fnma<mode>"
+  [(set (match_operand:VWEXTF 0 "register_operand")
+	(fma:VWEXTF
+	  (neg:VWEXTF
+	    (float_extend:VWEXTF
+	      (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand")))
+	  (match_operand:VWEXTF 3 "register_operand")
+	  (match_operand:VWEXTF 1 "register_operand")))]
+  "TARGET_VECTOR && can_create_pseudo_p ()"
+  "#"
+  "&& 1"
+  [(const_int 0)]
+  {
+    insn_code icode = code_for_pred_extend (<MODE>mode);
+    rtx tmp = gen_reg_rtx (<MODE>mode);
+    rtx ext_ops[] = {tmp, operands[2]};
+    riscv_vector::emit_vlmax_insn (icode, riscv_vector::RVV_UNOP, ext_ops);
+
+    rtx dst = expand_ternary_op (<MODE>mode, fnma_optab, tmp, operands[3],
+				 operands[1], operands[0], 0);
+    emit_move_insn (operands[0], dst);
+    DONE;
+  }
+  [(set_attr "type" "vfwmuladd")
+   (set_attr "mode" "<V_DOUBLE_TRUNC>")])
+
+;; -------------------------------------------------------------------------
+;; ---- [FP] VFWMSAC
+;; -------------------------------------------------------------------------
+;; Includes:
+;; - vfwmsac.vv
+;; -------------------------------------------------------------------------
+
+;; Combine ext + ext + fms ===> widen fms.
+;; Most of circumstantces, LoopVectorizer will generate the following IR:
+;; vect__8.176_40 = (vector([2,2]) double) vect__7.175_41;
+;; vect__11.180_35 = (vector([2,2]) double) vect__10.179_36;
+;; vect__13.182_33 = .FMS (vect__11.180_35, vect__8.176_40, vect__4.172_45);
+(define_insn_and_split "*double_widen_fms<mode>"
+  [(set (match_operand:VWEXTF 0 "register_operand")
+	(fma:VWEXTF
+	  (float_extend:VWEXTF
+	    (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand"))
+	  (float_extend:VWEXTF
+	    (match_operand:<V_DOUBLE_TRUNC> 3 "register_operand"))
+	  (neg:VWEXTF
+	    (match_operand:VWEXTF 1 "register_operand"))))]
+  "TARGET_VECTOR && can_create_pseudo_p ()"
+  "#"
+  "&& 1"
+  [(const_int 0)]
+  {
+    riscv_vector::emit_vlmax_fp_ternary_insn (code_for_pred_widen_mul (MINUS, <MODE>mode),
+					      riscv_vector::RVV_WIDEN_TERNOP, operands);
+    DONE;
+  }
+  [(set_attr "type" "vfwmuladd")
+   (set_attr "mode" "<V_DOUBLE_TRUNC>")])
+
+;; This helps to match ext + fms.
+(define_insn_and_split "*single_widen_fms<mode>"
+  [(set (match_operand:VWEXTF 0 "register_operand")
+	(fma:VWEXTF
+	  (float_extend:VWEXTF
+	    (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand"))
+	  (match_operand:VWEXTF 3 "register_operand")
+	  (neg:VWEXTF
+	    (match_operand:VWEXTF 1 "register_operand"))))]
+  "TARGET_VECTOR && can_create_pseudo_p ()"
+  "#"
+  "&& 1"
+  [(const_int 0)]
+  {
+    insn_code icode = code_for_pred_extend (<MODE>mode);
+    rtx tmp = gen_reg_rtx (<MODE>mode);
+    rtx ext_ops[] = {tmp, operands[2]};
+    riscv_vector::emit_vlmax_insn (icode, riscv_vector::RVV_UNOP, ext_ops);
+
+    rtx dst = expand_ternary_op (<MODE>mode, fms_optab, tmp, operands[3],
+				 operands[1], operands[0], 0);
+    emit_move_insn (operands[0], dst);
+    DONE;
+  }
+  [(set_attr "type" "vfwmuladd")
+   (set_attr "mode" "<V_DOUBLE_TRUNC>")])
+
+;; -------------------------------------------------------------------------
+;; ---- [FP] VFWNMACC
+;; -------------------------------------------------------------------------
+;; Includes:
+;; - vfwnmacc.vv
+;; -------------------------------------------------------------------------
+
+;; Combine ext + ext + fnms ===> widen fnms.
+;; Most of circumstantces, LoopVectorizer will generate the following IR:
+;; vect__8.176_40 = (vector([2,2]) double) vect__7.175_41;
+;; vect__11.180_35 = (vector([2,2]) double) vect__10.179_36;
+;; vect__13.182_33 = .FNMS (vect__11.180_35, vect__8.176_40, vect__4.172_45);
+(define_insn_and_split "*double_widen_fnms<mode>"
+  [(set (match_operand:VWEXTF 0 "register_operand")
+	(fma:VWEXTF
+	  (neg:VWEXTF
+	    (float_extend:VWEXTF
+	      (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand")))
+	  (float_extend:VWEXTF
+	    (match_operand:<V_DOUBLE_TRUNC> 3 "register_operand"))
+	  (neg:VWEXTF
+	    (match_operand:VWEXTF 1 "register_operand"))))]
+  "TARGET_VECTOR && can_create_pseudo_p ()"
+  "#"
+  "&& 1"
+  [(const_int 0)]
+  {
+    riscv_vector::emit_vlmax_fp_ternary_insn (code_for_pred_widen_mul_neg (MINUS, <MODE>mode),
+					      riscv_vector::RVV_WIDEN_TERNOP, operands);
+    DONE;
+  }
+  [(set_attr "type" "vfwmuladd")
+   (set_attr "mode" "<V_DOUBLE_TRUNC>")])
+
+;; This helps to match ext + fnms.
+(define_insn_and_split "*single_widen_fnms<mode>"
+  [(set (match_operand:VWEXTF 0 "register_operand")
+	(fma:VWEXTF
+	  (neg:VWEXTF
+	    (float_extend:VWEXTF
+	      (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand")))
+	  (match_operand:VWEXTF 3 "register_operand")
+	  (neg:VWEXTF
+	    (match_operand:VWEXTF 1 "register_operand"))))]
+  "TARGET_VECTOR && can_create_pseudo_p ()"
+  "#"
+  "&& 1"
+  [(const_int 0)]
+  {
+    insn_code icode = code_for_pred_extend (<MODE>mode);
+    rtx tmp = gen_reg_rtx (<MODE>mode);
+    rtx ext_ops[] = {tmp, operands[2]};
+    riscv_vector::emit_vlmax_insn (icode, riscv_vector::RVV_UNOP, ext_ops);
+
+    rtx dst = expand_ternary_op (<MODE>mode, fnms_optab, tmp, operands[3],
+				 operands[1], operands[0], 0);
+    emit_move_insn (operands[0], dst);
+    DONE;
+  }
+  [(set_attr "type" "vfwmuladd")
+   (set_attr "mode" "<V_DOUBLE_TRUNC>")])
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-10.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-10.c
new file mode 100644
index 00000000000..490f1a41068
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-10.c
@@ -0,0 +1,22 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -O3 -ffast-math" } */
+
+#include <stdint-gcc.h>
+
+#define TEST_TYPE(TYPE1, TYPE2)                                                \
+  __attribute__ ((noipa)) void vwmacc_##TYPE1_##TYPE2 (TYPE1 *__restrict dst,  \
+						       TYPE2 *__restrict a,    \
+						       TYPE2 *__restrict b,    \
+						       int n)                  \
+  {                                                                            \
+    for (int i = 0; i < n; i++)                                                \
+      dst[i] += -((TYPE1) a[i] * (TYPE1) b[i]);                                \
+  }
+
+#define TEST_ALL()                                                             \
+  TEST_TYPE (float, _Float16)                                                  \
+  TEST_TYPE (double, float)
+
+TEST_ALL ()
+
+/* { dg-final { scan-assembler-times {\tvfwnmsac\.vv} 2 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-11.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-11.c
new file mode 100644
index 00000000000..4d44a40fed3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-11.c
@@ -0,0 +1,22 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -O3 -ffast-math" } */
+
+#include <stdint-gcc.h>
+
+#define TEST_TYPE(TYPE1, TYPE2)                                                \
+  __attribute__ ((noipa)) void vwmacc_##TYPE1_##TYPE2 (TYPE1 *__restrict dst,  \
+						       TYPE2 *__restrict a,    \
+						       TYPE2 *__restrict b,    \
+						       int n)                  \
+  {                                                                            \
+    for (int i = 0; i < n; i++)                                                \
+      dst[i] = (TYPE1) a[i] * (TYPE1) b[i] - dst[i];                           \
+  }
+
+#define TEST_ALL()                                                             \
+  TEST_TYPE (float, _Float16)                                                  \
+  TEST_TYPE (double, float)
+
+TEST_ALL ()
+
+/* { dg-final { scan-assembler-times {\tvfwmsac\.vv} 2 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-12.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-12.c
new file mode 100644
index 00000000000..2cb2a1edebf
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-12.c
@@ -0,0 +1,22 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -O3 -ffast-math" } */
+
+#include <stdint-gcc.h>
+
+#define TEST_TYPE(TYPE1, TYPE2)                                                \
+  __attribute__ ((noipa)) void vwmacc_##TYPE1_##TYPE2 (TYPE1 *__restrict dst,  \
+						       TYPE2 *__restrict a,    \
+						       TYPE2 *__restrict b,    \
+						       int n)                  \
+  {                                                                            \
+    for (int i = 0; i < n; i++)                                                \
+      dst[i] = -((TYPE1) a[i] * (TYPE1) b[i]) - dst[i];                        \
+  }
+
+#define TEST_ALL()                                                             \
+  TEST_TYPE (float, _Float16)                                                  \
+  TEST_TYPE (double, float)
+
+TEST_ALL ()
+
+/* { dg-final { scan-assembler-times {\tvfwnmacc\.vv} 2 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-complicate-7.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-complicate-7.c
new file mode 100644
index 00000000000..2e3f6664d93
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-complicate-7.c
@@ -0,0 +1,27 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -ffast-math" } */
+
+#include <stdint-gcc.h>
+
+#define TEST_TYPE(TYPE1, TYPE2)                                                \
+  __attribute__ ((noipa)) void vwadd_##TYPE1_##TYPE2 (                         \
+    TYPE1 *__restrict dst, TYPE1 *__restrict dst2, TYPE1 *__restrict dst3,     \
+    TYPE1 *__restrict dst4, TYPE2 *__restrict a, TYPE2 *__restrict b,          \
+    TYPE2 *__restrict a2, TYPE2 *__restrict b2, int n)                         \
+  {                                                                            \
+    for (int i = 0; i < n; i++)                                                \
+      {                                                                        \
+	dst[i] += -((TYPE1) a[i] * (TYPE1) b[i]);                              \
+	dst2[i] += -((TYPE1) a2[i] * (TYPE1) b[i]);                            \
+	dst3[i] += -((TYPE1) a2[i] * (TYPE1) a[i]);                            \
+	dst4[i] += -((TYPE1) a[i] * (TYPE1) b2[i]);                            \
+      }                                                                        \
+  }
+
+#define TEST_ALL()                                                             \
+  TEST_TYPE (float, _Float16)                                                  \
+  TEST_TYPE (double, float)
+
+TEST_ALL ()
+
+/* { dg-final { scan-assembler-times {\tvfwnmsac\.vv} 8 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-complicate-8.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-complicate-8.c
new file mode 100644
index 00000000000..2acfbd01c6d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-complicate-8.c
@@ -0,0 +1,27 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -ffast-math" } */
+
+#include <stdint-gcc.h>
+
+#define TEST_TYPE(TYPE1, TYPE2)                                                \
+  __attribute__ ((noipa)) void vwadd_##TYPE1_##TYPE2 (                         \
+    TYPE1 *__restrict dst, TYPE1 *__restrict dst2, TYPE1 *__restrict dst3,     \
+    TYPE1 *__restrict dst4, TYPE2 *__restrict a, TYPE2 *__restrict b,          \
+    TYPE2 *__restrict a2, TYPE2 *__restrict b2, int n)                         \
+  {                                                                            \
+    for (int i = 0; i < n; i++)                                                \
+      {                                                                        \
+	dst[i] = (TYPE1) a[i] * (TYPE1) b[i] - dst[i];                         \
+	dst2[i] = (TYPE1) a2[i] * (TYPE1) b[i] - dst2[i];                      \
+	dst3[i] = (TYPE1) a2[i] * (TYPE1) a[i] - dst3[i];                      \
+	dst4[i] = (TYPE1) a[i] * (TYPE1) b2[i] - dst4[i];                      \
+      }                                                                        \
+  }
+
+#define TEST_ALL()                                                             \
+  TEST_TYPE (float, _Float16)                                                  \
+  TEST_TYPE (double, float)
+
+TEST_ALL ()
+
+/* { dg-final { scan-assembler-times {\tvfwmsac\.vv} 8 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-complicate-9.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-complicate-9.c
new file mode 100644
index 00000000000..da7f870c12b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen-complicate-9.c
@@ -0,0 +1,27 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv32gcv_zvfh -mabi=ilp32d --param=riscv-autovec-preference=scalable -ffast-math" } */
+
+#include <stdint-gcc.h>
+
+#define TEST_TYPE(TYPE1, TYPE2)                                                \
+  __attribute__ ((noipa)) void vwadd_##TYPE1_##TYPE2 (                         \
+    TYPE1 *__restrict dst, TYPE1 *__restrict dst2, TYPE1 *__restrict dst3,     \
+    TYPE1 *__restrict dst4, TYPE2 *__restrict a, TYPE2 *__restrict b,          \
+    TYPE2 *__restrict a2, TYPE2 *__restrict b2, int n)                         \
+  {                                                                            \
+    for (int i = 0; i < n; i++)                                                \
+      {                                                                        \
+	dst[i] = -((TYPE1) a[i] * (TYPE1) b[i]) - dst[i];                      \
+	dst2[i] = -((TYPE1) a2[i] * (TYPE1) b[i]) - dst2[i];                   \
+	dst3[i] = -((TYPE1) a2[i] * (TYPE1) a[i]) - dst3[i];                   \
+	dst4[i] = -((TYPE1) a[i] * (TYPE1) b2[i]) - dst4[i];                   \
+      }                                                                        \
+  }
+
+#define TEST_ALL()                                                             \
+  TEST_TYPE (float, _Float16)                                                  \
+  TEST_TYPE (double, float)
+
+TEST_ALL ()
+
+/* { dg-final { scan-assembler-times {\tvfwnmacc\.vv} 8 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run-10.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run-10.c
new file mode 100644
index 00000000000..262660c5bcd
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run-10.c
@@ -0,0 +1,32 @@ 
+/* { dg-do run { target { riscv_vector } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -ffast-math" } */
+
+#include <assert.h>
+#include "widen-10.c"
+
+#define SZ 512
+
+#define RUN(TYPE1, TYPE2, LIMIT)                                               \
+  TYPE2 a##TYPE2[SZ];                                                          \
+  TYPE2 b##TYPE2[SZ];                                                          \
+  TYPE1 dst##TYPE1[SZ];                                                        \
+  TYPE1 dst2##TYPE1[SZ];                                                       \
+  for (int i = 0; i < SZ; i++)                                                 \
+    {                                                                          \
+      a##TYPE2[i] = LIMIT + i % 8723;                                          \
+      b##TYPE2[i] = LIMIT + i & 1964;                                          \
+      dst##TYPE1[i] = LIMIT + i & 628;                                         \
+      dst2##TYPE1[i] = LIMIT + i & 628;                                        \
+    }                                                                          \
+  vwmacc_##TYPE1_##TYPE2 (dst##TYPE1, a##TYPE2, b##TYPE2, SZ);                 \
+  for (int i = 0; i < SZ; i++)                                                 \
+    assert (dst##TYPE1[i]                                                      \
+	    == -((TYPE1) a##TYPE2[i] * (TYPE1) b##TYPE2[i]) + dst2##TYPE1[i]);
+
+#define RUN_ALL() RUN (double, float, -2147483648)
+
+int
+main ()
+{
+  RUN_ALL ()
+}
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run-11.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run-11.c
new file mode 100644
index 00000000000..246999cab62
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run-11.c
@@ -0,0 +1,32 @@ 
+/* { dg-do run { target { riscv_vector } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -ffast-math" } */
+
+#include <assert.h>
+#include "widen-11.c"
+
+#define SZ 512
+
+#define RUN(TYPE1, TYPE2, LIMIT)                                               \
+  TYPE2 a##TYPE2[SZ];                                                          \
+  TYPE2 b##TYPE2[SZ];                                                          \
+  TYPE1 dst##TYPE1[SZ];                                                        \
+  TYPE1 dst2##TYPE1[SZ];                                                       \
+  for (int i = 0; i < SZ; i++)                                                 \
+    {                                                                          \
+      a##TYPE2[i] = LIMIT + i % 8723;                                          \
+      b##TYPE2[i] = LIMIT + i & 1964;                                          \
+      dst##TYPE1[i] = LIMIT + i & 628;                                         \
+      dst2##TYPE1[i] = LIMIT + i & 628;                                        \
+    }                                                                          \
+  vwmacc_##TYPE1_##TYPE2 (dst##TYPE1, a##TYPE2, b##TYPE2, SZ);                 \
+  for (int i = 0; i < SZ; i++)                                                 \
+    assert (dst##TYPE1[i]                                                      \
+	    == ((TYPE1) a##TYPE2[i] * (TYPE1) b##TYPE2[i]) - dst2##TYPE1[i]);
+
+#define RUN_ALL() RUN (double, float, -2147483648)
+
+int
+main ()
+{
+  RUN_ALL ()
+}
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run-12.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run-12.c
new file mode 100644
index 00000000000..2a6a03b5b35
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run-12.c
@@ -0,0 +1,32 @@ 
+/* { dg-do run { target { riscv_vector } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -ffast-math" } */
+
+#include <assert.h>
+#include "widen-12.c"
+
+#define SZ 512
+
+#define RUN(TYPE1, TYPE2, LIMIT)                                               \
+  TYPE2 a##TYPE2[SZ];                                                          \
+  TYPE2 b##TYPE2[SZ];                                                          \
+  TYPE1 dst##TYPE1[SZ];                                                        \
+  TYPE1 dst2##TYPE1[SZ];                                                       \
+  for (int i = 0; i < SZ; i++)                                                 \
+    {                                                                          \
+      a##TYPE2[i] = LIMIT + i % 8723;                                          \
+      b##TYPE2[i] = LIMIT + i & 1964;                                          \
+      dst##TYPE1[i] = LIMIT + i & 628;                                         \
+      dst2##TYPE1[i] = LIMIT + i & 628;                                        \
+    }                                                                          \
+  vwmacc_##TYPE1_##TYPE2 (dst##TYPE1, a##TYPE2, b##TYPE2, SZ);                 \
+  for (int i = 0; i < SZ; i++)                                                 \
+    assert (dst##TYPE1[i]                                                      \
+	    == -((TYPE1) a##TYPE2[i] * (TYPE1) b##TYPE2[i]) - dst2##TYPE1[i]);
+
+#define RUN_ALL() RUN (double, float, -2147483648)
+
+int
+main ()
+{
+  RUN_ALL ()
+}
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run_zvfh-10.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run_zvfh-10.c
new file mode 100644
index 00000000000..f678c35f81f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run_zvfh-10.c
@@ -0,0 +1,32 @@ 
+/* { dg-do run { target { riscv_vector && riscv_zvfh_hw } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -ffast-math" } */
+
+#include <assert.h>
+#include "widen-10.c"
+
+#define SZ 512
+
+#define RUN(TYPE1, TYPE2, LIMIT)                                               \
+  TYPE2 a##TYPE2[SZ];                                                          \
+  TYPE2 b##TYPE2[SZ];                                                          \
+  TYPE1 dst##TYPE1[SZ];                                                        \
+  TYPE1 dst2##TYPE1[SZ];                                                       \
+  for (int i = 0; i < SZ; i++)                                                 \
+    {                                                                          \
+      a##TYPE2[i] = LIMIT + i % 8723;                                          \
+      b##TYPE2[i] = LIMIT + i & 1964;                                          \
+      dst##TYPE1[i] = LIMIT + i & 628;                                         \
+      dst2##TYPE1[i] = LIMIT + i & 628;                                        \
+    }                                                                          \
+  vwmacc_##TYPE1_##TYPE2 (dst##TYPE1, a##TYPE2, b##TYPE2, SZ);                 \
+  for (int i = 0; i < SZ; i++)                                                 \
+    assert (dst##TYPE1[i]                                                      \
+	    == -((TYPE1) a##TYPE2[i] * (TYPE1) b##TYPE2[i]) + dst2##TYPE1[i]);
+
+#define RUN_ALL() RUN (float, _Float16, -32768)
+
+int
+main ()
+{
+  RUN_ALL ()
+}
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run_zvfh-11.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run_zvfh-11.c
new file mode 100644
index 00000000000..294f77dbc46
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run_zvfh-11.c
@@ -0,0 +1,32 @@ 
+/* { dg-do run { target { riscv_vector && riscv_zvfh_hw } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -ffast-math" } */
+
+#include <assert.h>
+#include "widen-11.c"
+
+#define SZ 512
+
+#define RUN(TYPE1, TYPE2, LIMIT)                                               \
+  TYPE2 a##TYPE2[SZ];                                                          \
+  TYPE2 b##TYPE2[SZ];                                                          \
+  TYPE1 dst##TYPE1[SZ];                                                        \
+  TYPE1 dst2##TYPE1[SZ];                                                       \
+  for (int i = 0; i < SZ; i++)                                                 \
+    {                                                                          \
+      a##TYPE2[i] = LIMIT + i % 8723;                                          \
+      b##TYPE2[i] = LIMIT + i & 1964;                                          \
+      dst##TYPE1[i] = LIMIT + i & 628;                                         \
+      dst2##TYPE1[i] = LIMIT + i & 628;                                        \
+    }                                                                          \
+  vwmacc_##TYPE1_##TYPE2 (dst##TYPE1, a##TYPE2, b##TYPE2, SZ);                 \
+  for (int i = 0; i < SZ; i++)                                                 \
+    assert (dst##TYPE1[i]                                                      \
+	    == ((TYPE1) a##TYPE2[i] * (TYPE1) b##TYPE2[i]) - dst2##TYPE1[i]);
+
+#define RUN_ALL() RUN (float, _Float16, -32768)
+
+int
+main ()
+{
+  RUN_ALL ()
+}
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run_zvfh-12.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run_zvfh-12.c
new file mode 100644
index 00000000000..013291cdc60
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/widen/widen_run_zvfh-12.c
@@ -0,0 +1,32 @@ 
+/* { dg-do run { target { riscv_vector && riscv_zvfh_hw } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -ffast-math" } */
+
+#include <assert.h>
+#include "widen-12.c"
+
+#define SZ 512
+
+#define RUN(TYPE1, TYPE2, LIMIT)                                               \
+  TYPE2 a##TYPE2[SZ];                                                          \
+  TYPE2 b##TYPE2[SZ];                                                          \
+  TYPE1 dst##TYPE1[SZ];                                                        \
+  TYPE1 dst2##TYPE1[SZ];                                                       \
+  for (int i = 0; i < SZ; i++)                                                 \
+    {                                                                          \
+      a##TYPE2[i] = LIMIT + i % 8723;                                          \
+      b##TYPE2[i] = LIMIT + i & 1964;                                          \
+      dst##TYPE1[i] = LIMIT + i & 628;                                         \
+      dst2##TYPE1[i] = LIMIT + i & 628;                                        \
+    }                                                                          \
+  vwmacc_##TYPE1_##TYPE2 (dst##TYPE1, a##TYPE2, b##TYPE2, SZ);                 \
+  for (int i = 0; i < SZ; i++)                                                 \
+    assert (dst##TYPE1[i]                                                      \
+	    == -((TYPE1) a##TYPE2[i] * (TYPE1) b##TYPE2[i]) - dst2##TYPE1[i]);
+
+#define RUN_ALL() RUN (float, _Float16, -32768)
+
+int
+main ()
+{
+  RUN_ALL ()
+}