RISC-V: Add conditional convert autovec patterns between FPs

diff --git a/gcc/config/riscv/autovec-opt.md b/gcc/config/riscv/autovec-opt.md
index f3ef3a839df..8f9a6317592 100644
--- a/gcc/config/riscv/autovec-opt.md
+++ b/gcc/config/riscv/autovec-opt.md
@@ -792,3 +792,38 @@ 
   riscv_vector::emit_vlmax_masked_insn (icode, riscv_vector::RVV_UNOP_M, operands);
   DONE;
 })
+
+;; Combine FP sign_extend/zero_extend(vf2) and vcond_mask
+(define_insn_and_split "*cond_extend<v_double_trunc><mode>"
+  [(set (match_operand:VWEXTF_ZVFHMIN 0 "register_operand")
+        (if_then_else:VWEXTF_ZVFHMIN
+          (match_operand:<VM> 1 "register_operand")
+          (float_extend:VWEXTF_ZVFHMIN (match_operand:<V_DOUBLE_TRUNC> 3 "register_operand"))
+          (match_operand:VWEXTF_ZVFHMIN 2 "register_operand")))]
+  "TARGET_VECTOR && can_create_pseudo_p ()"
+  "#"
+  "&& 1"
+  [(const_int 0)]
+{
+  insn_code icode = code_for_pred_extend (<MODE>mode);
+  riscv_vector::emit_vlmax_masked_insn (icode, riscv_vector::RVV_UNOP_M, operands);
+  DONE;
+})
+
+;; Combine FP trunc(vf2) + vcond_mask
+(define_insn_and_split "*cond_trunc<mode><v_double_trunc>"
+  [(set (match_operand:<V_DOUBLE_TRUNC> 0 "register_operand")
+    (if_then_else:<V_DOUBLE_TRUNC>
+          (match_operand:<VM> 1 "register_operand")
+          (float_truncate:<V_DOUBLE_TRUNC>
+            (match_operand:VWEXTF_ZVFHMIN 3 "register_operand"))
+          (match_operand:<V_DOUBLE_TRUNC> 2 "register_operand")))]
+  "TARGET_VECTOR && can_create_pseudo_p ()"
+  "#"
+  "&& 1"
+  [(const_int 0)]
+{
+  insn_code icode = code_for_pred_trunc (<MODE>mode);
+  riscv_vector::emit_vlmax_masked_fp_insn (icode, riscv_vector::RVV_UNOP_M, operands);
+  DONE;
+})
diff --git a/gcc/config/riscv/autovec.md b/gcc/config/riscv/autovec.md
index 4936333f303..f2bf5e045ee 100644
--- a/gcc/config/riscv/autovec.md
+++ b/gcc/config/riscv/autovec.md
@@ -752,14 +752,9 @@ 
      (match_operand:<V_QUAD_TRUNC> 1 "register_operand")))]
   "TARGET_VECTOR && (TARGET_ZVFHMIN || TARGET_ZVFH)"
 {
-  rtx dblw = gen_reg_rtx (<V_DOUBLE_TRUNC>mode);
-  insn_code icode = code_for_pred_extend (<V_DOUBLE_TRUNC>mode);
-  rtx ops1[] = {dblw, operands[1]};
-  riscv_vector::emit_vlmax_insn (icode, riscv_vector::RVV_UNOP, ops1);
-
-  icode = code_for_pred_extend (<MODE>mode);
-  rtx ops2[] = {operands[0], dblw};
-  riscv_vector::emit_vlmax_insn (icode, riscv_vector::RVV_UNOP, ops2);
+  rtx half = gen_reg_rtx (<V_DOUBLE_TRUNC>mode);
+  emit_insn (gen_extend<v_quad_trunc><v_double_trunc>2 (half, operands[1]));
+  emit_insn (gen_extend<v_double_trunc><mode>2 (operands[0], half));
   DONE;
 })
 
@@ -802,9 +797,7 @@ 
   insn_code icode = code_for_pred_rod_trunc (<MODE>mode);
   riscv_vector::emit_vlmax_insn (icode, riscv_vector::RVV_UNOP, opshalf);
 
-  rtx ops[] = {operands[0], half};
-  icode = code_for_pred_trunc (<V_DOUBLE_TRUNC>mode);
-  riscv_vector::emit_vlmax_fp_insn (icode, riscv_vector::RVV_UNOP, ops);
+  emit_insn (gen_trunc<v_double_trunc><v_quad_trunc>2 (operands[0], half));
   DONE;
 })
 
diff --git a/gcc/config/riscv/riscv-protos.h b/gcc/config/riscv/riscv-protos.h
index 558330718a1..ecd9d22ba25 100644
--- a/gcc/config/riscv/riscv-protos.h
+++ b/gcc/config/riscv/riscv-protos.h
@@ -256,6 +256,7 @@  void emit_vlmax_cmp_insn (unsigned, rtx *);
 void emit_vlmax_cmp_mu_insn (unsigned, rtx *);
 void emit_vlmax_masked_insn (unsigned, int, rtx *);
 void emit_vlmax_masked_mu_insn (unsigned, int, rtx *);
+void emit_vlmax_masked_fp_insn (unsigned, int, rtx *);
 void emit_scalar_move_insn (unsigned, rtx *, rtx = 0);
 void emit_nonvlmax_integer_move_insn (unsigned, rtx *, rtx);
 enum vlmul_type get_vlmul (machine_mode);
diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc
index a2cf006804b..887ce367600 100644
--- a/gcc/config/riscv/riscv-v.cc
+++ b/gcc/config/riscv/riscv-v.cc
@@ -922,6 +922,25 @@  emit_vlmax_masked_insn (unsigned icode, int op_num, rtx *ops)
   e.emit_insn ((enum insn_code) icode, ops);
 }
 
+/* This function emits a masked instruction which depend FRM_DYN.  */
+void
+emit_vlmax_masked_fp_insn (unsigned icode, int op_num, rtx *ops)
+{
+  machine_mode dest_mode = GET_MODE (ops[0]);
+  machine_mode mask_mode = get_mask_mode (dest_mode);
+  insn_expander<RVV_INSN_OPERANDS_MAX> e (/*OP_NUM*/ op_num,
+					  /*HAS_DEST_P*/ true,
+					  /*FULLY_UNMASKED_P*/ false,
+					  /*USE_REAL_MERGE_P*/ true,
+					  /*HAS_AVL_P*/ true,
+					  /*VLMAX_P*/ true, dest_mode,
+					  mask_mode);
+  e.set_policy (TAIL_ANY);
+  e.set_policy (MASK_ANY);
+  e.set_rounding_mode (FRM_DYN);
+  e.emit_insn ((enum insn_code) icode, ops);
+}
+
 /* This function emits a masked instruction.  */
 static void
 emit_nonvlmax_masked_insn (unsigned icode, int op_num, rtx *ops, rtx avl)
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-1.h b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-1.h
new file mode 100644
index 00000000000..1b72069c884
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-1.h
@@ -0,0 +1,30 @@ 
+#include <stdint.h>
+
+#define DEF_LOOP(OLD_TYPE, NEW_TYPE)                                           \
+  void __attribute__ ((noipa))                                                 \
+  test_##OLD_TYPE##_2_##NEW_TYPE (NEW_TYPE *__restrict r,                      \
+				  OLD_TYPE *__restrict a,                      \
+				  NEW_TYPE *__restrict b,                      \
+				  OLD_TYPE *__restrict pred, int n)            \
+  {                                                                            \
+    for (int i = 0; i < n; ++i)                                                \
+      {                                                                        \
+	NEW_TYPE bi = b[i];                                                    \
+	r[i] = pred[i] ? (NEW_TYPE) a[i] : bi;                                 \
+      }                                                                        \
+  }
+
+/* wider-width Float Type => Float Type */
+#define TEST_ALL_F2F_WIDER(T)                                                  \
+  T (_Float16, float)                                                          \
+  T (_Float16, double)                                                         \
+  T (float, double)
+
+/* narrower-width Float Type => Float Type */
+#define TEST_ALL_F2F_NARROWER(T)                                               \
+  T (float, _Float16)                                                          \
+  T (double, _Float16)                                                         \
+  T (double, float)
+
+TEST_ALL_F2F_WIDER (DEF_LOOP)
+TEST_ALL_F2F_NARROWER (DEF_LOOP)
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-2.h b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-2.h
new file mode 100644
index 00000000000..41597417a84
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-2.h
@@ -0,0 +1,28 @@ 
+#include <stdint.h>
+
+#define DEF_LOOP(OLD_TYPE, NEW_TYPE)                                           \
+  void __attribute__ ((noipa))                                                 \
+  test_##OLD_TYPE##_2_##NEW_TYPE (NEW_TYPE *__restrict r,                      \
+				  OLD_TYPE *__restrict a, NEW_TYPE b,          \
+				  OLD_TYPE *__restrict pred, int n)            \
+  {                                                                            \
+    for (int i = 0; i < n; ++i)                                                \
+      {                                                                        \
+	r[i] = pred[i] ? (NEW_TYPE) a[i] : b;                                  \
+      }                                                                        \
+  }
+
+/* wider-width Float Type => Float Type */
+#define TEST_ALL_F2F_WIDER(T)                                                  \
+  T (_Float16, float)                                                          \
+  T (_Float16, double)                                                         \
+  T (float, double)
+
+/* narrower-width Float Type => Float Type */
+#define TEST_ALL_F2F_NARROWER(T)                                               \
+  T (float, _Float16)                                                          \
+  T (double, _Float16)                                                         \
+  T (double, float)
+
+TEST_ALL_F2F_WIDER (DEF_LOOP)
+TEST_ALL_F2F_NARROWER (DEF_LOOP)
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv32-1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv32-1.c
new file mode 100644
index 00000000000..e0d9eaa4173
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv32-1.c
@@ -0,0 +1,9 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv32gcv_zvfh -mabi=ilp32d --param riscv-autovec-preference=scalable -fno-vect-cost-model -ffast-math" } */
+
+#include "cond_convert_float2float-1.h"
+
+/* { dg-final { scan-assembler-times {\tvfwcvt\.f\.f\.v\tv[0-9]+,v[0-9]+,v0\.t} 3 } } */
+/* { dg-final { scan-assembler-times {\tvfwcvt\.f\.f\.v\tv[0-9]+,v[0-9]+\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tvfncvt\.f\.f\.w\tv[0-9]+,v[0-9]+,v0\.t} 3 } } */
+/* { dg-final { scan-assembler-times {\tvfncvt\.rod\.f\.f\.w\tv[0-9]+,v[0-9]+\n} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv32-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv32-2.c
new file mode 100644
index 00000000000..8d963b0397b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv32-2.c
@@ -0,0 +1,9 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv32gcv_zvfh -mabi=ilp32d --param riscv-autovec-preference=scalable -fno-vect-cost-model -ffast-math" } */
+
+#include "cond_convert_float2float-2.h"
+
+/* { dg-final { scan-assembler-times {\tvfwcvt\.f\.f\.v\tv[0-9]+,v[0-9]+,v0\.t} 3 } } */
+/* { dg-final { scan-assembler-times {\tvfwcvt\.f\.f\.v\tv[0-9]+,v[0-9]+\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tvfncvt\.f\.f\.w\tv[0-9]+,v[0-9]+,v0\.t} 3 } } */
+/* { dg-final { scan-assembler-times {\tvfncvt\.rod\.f\.f\.w\tv[0-9]+,v[0-9]+\n} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv64-1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv64-1.c
new file mode 100644
index 00000000000..9841fdd7f79
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv64-1.c
@@ -0,0 +1,9 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv64gcv_zvfh -mabi=lp64d --param riscv-autovec-preference=scalable -fno-vect-cost-model -ffast-math" } */
+
+#include "cond_convert_float2float-1.h"
+
+/* { dg-final { scan-assembler-times {\tvfwcvt\.f\.f\.v\tv[0-9]+,v[0-9]+,v0\.t} 3 } } */
+/* { dg-final { scan-assembler-times {\tvfwcvt\.f\.f\.v\tv[0-9]+,v[0-9]+\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tvfncvt\.f\.f\.w\tv[0-9]+,v[0-9]+,v0\.t} 3 } } */
+/* { dg-final { scan-assembler-times {\tvfncvt\.rod\.f\.f\.w\tv[0-9]+,v[0-9]+\n} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv64-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv64-2.c
new file mode 100644
index 00000000000..03ee19fa9e8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float-rv64-2.c
@@ -0,0 +1,9 @@ 
+/* { dg-do compile } */
+/* { dg-additional-options "-march=rv64gcv_zvfh -mabi=lp64d --param riscv-autovec-preference=scalable -fno-vect-cost-model -ffast-math" } */
+
+#include "cond_convert_float2float-2.h"
+
+/* { dg-final { scan-assembler-times {\tvfwcvt\.f\.f\.v\tv[0-9]+,v[0-9]+,v0\.t} 3 } } */
+/* { dg-final { scan-assembler-times {\tvfwcvt\.f\.f\.v\tv[0-9]+,v[0-9]+\n} 1 } } */
+/* { dg-final { scan-assembler-times {\tvfncvt\.f\.f\.w\tv[0-9]+,v[0-9]+,v0\.t} 3 } } */
+/* { dg-final { scan-assembler-times {\tvfncvt\.rod\.f\.f\.w\tv[0-9]+,v[0-9]+\n} 1 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float_run-1.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float_run-1.c
new file mode 100644
index 00000000000..407bbc27c2f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float_run-1.c
@@ -0,0 +1,31 @@ 
+/* { dg-do run { target { riscv_vector } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model  -ffast-math" } */
+
+#include "cond_convert_float2float-1.h"
+
+#define N 99
+
+#define TEST_LOOP(OLD_TYPE, NEW_TYPE)                                          \
+  {                                                                            \
+    NEW_TYPE r[N], b[N];                                                       \
+    OLD_TYPE a[N], pred[N];                                                    \
+    for (int i = 0; i < N; ++i)                                                \
+      {                                                                        \
+	a[i] = (i & 1 ? i : 3 * i) * (i % 3 == 0 ? 1 : -1);                    \
+	b[i] = (i % 9) * (i % 7 + 1);                                          \
+	pred[i] = (i % 7 < 4);                                                 \
+	asm volatile("" ::: "memory");                                         \
+      }                                                                        \
+    test_##OLD_TYPE##_2_##NEW_TYPE (r, a, b, pred, N);                         \
+    for (int i = 0; i < N; ++i)                                                \
+      if (r[i] != (pred[i] ? (NEW_TYPE) a[i] : b[i]))                          \
+	__builtin_abort ();                                                    \
+  }
+
+int
+main ()
+{
+  TEST_ALL_F2F_WIDER (TEST_LOOP)
+  TEST_ALL_F2F_NARROWER (TEST_LOOP)
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float_run-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float_run-2.c
new file mode 100644
index 00000000000..05d217da625
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/cond/cond_convert_float2float_run-2.c
@@ -0,0 +1,30 @@ 
+/* { dg-do run { target { riscv_vector } } } */
+/* { dg-additional-options "--param=riscv-autovec-preference=scalable -fno-vect-cost-model  -ffast-math" } */
+
+#include "cond_convert_float2float-2.h"
+
+#define N 99
+
+#define TEST_LOOP(OLD_TYPE, NEW_TYPE)                                          \
+  {                                                                            \
+    NEW_TYPE r[N], b = 18.02;                                                  \
+    OLD_TYPE a[N], pred[N];                                                    \
+    for (int i = 0; i < N; ++i)                                                \
+      {                                                                        \
+	a[i] = (i & 1 ? i : 3 * i) * (i % 3 == 0 ? 1 : -1);                    \
+	pred[i] = (i % 7 < 4);                                                 \
+	asm volatile("" ::: "memory");                                         \
+      }                                                                        \
+    test_##OLD_TYPE##_2_##NEW_TYPE (r, a, b, pred, N);                         \
+    for (int i = 0; i < N; ++i)                                                \
+      if (r[i] != (pred[i] ? (NEW_TYPE) a[i] : b))                             \
+	__builtin_abort ();                                                    \
+  }
+
+int
+main ()
+{
+  TEST_ALL_F2F_WIDER (TEST_LOOP)
+  TEST_ALL_F2F_NARROWER (TEST_LOOP)
+  return 0;
+}