RISC-V: Add pattern for vector-scalar single-width floating-point sub

This pattern enables the combine pass (or late-combine, depending on the case)
to merge a vec_duplicate into a minus RTL instruction. The vec_duplicate is the
subtrahend operand.

Before this patch, we have two instructions, e.g.:
  vfmv.v.f       v2,fa0
  vfsub.vv       v1,v1,v2

After, we get only one:
  vfsub.vf       v1,v1,fa0

gcc/ChangeLog:

	* config/riscv/autovec-opt.md (*vfsub_vf_<mode>): New pattern to
	combine vec_duplicate + vfsub.vv into vfsub.vf.
	* config/riscv/vector.md (@pred_<optab><mode>_scalar): Allow VLS modes.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/vls/floating-point-sub-2.c: Adjust scan
	dumps.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f16.c: Add vfsub.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f32.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f64.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f16.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f32.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f64.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f16.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f32.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f64.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f16.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f32.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f64.c: Likewise.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf_binop_data.h: Add data for
	vfsub.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f16.c: New test.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f32.c: New test.
	* gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f64.c: New test.

19 files changed, 239 insertions, 7 deletions

diff --git a/gcc/config/riscv/autovec-opt.md b/gcc/config/riscv/autovec-opt.md
index f51b8ba..f4d13ca 100644
--- a/gcc/config/riscv/autovec-opt.md
+++ b/gcc/config/riscv/autovec-opt.md
@@ -2188,3 +2188,22 @@
   }
   [(set_attr "type" "vfalu")]
 )
+
+;; vfsub.vf
+(define_insn_and_split "*vfsub_vf_<mode>"
+  [(set (match_operand:V_VLSF 0 "register_operand")
+    (minus:V_VLSF
+      (match_operand:V_VLSF 1 "register_operand")
+      (vec_duplicate:V_VLSF
+        (match_operand:<VEL> 2 "register_operand"))))]
+  "TARGET_VECTOR && can_create_pseudo_p ()"
+  "#"
+  "&& 1"
+  [(const_int 0)]
+  {
+    riscv_vector::emit_vlmax_insn (code_for_pred_scalar (MINUS, <MODE>mode),
+				   riscv_vector::BINARY_OP_FRM_DYN, operands);
+    DONE;
+  }
+  [(set_attr "type" "vfalu")]
+)
diff --git a/gcc/config/riscv/vector.md b/gcc/config/riscv/vector.md
index d62f8bb..c6c37df 100644
--- a/gcc/config/riscv/vector.md
+++ b/gcc/config/riscv/vector.md
@@ -6441,8 +6441,8 @@
    (set_attr "mode" "<MODE>")])
 
 (define_insn "@pred_<optab><mode>_scalar"
-  [(set (match_operand:VF 0 "register_operand"           "=vd, vd, vr, vr")
-	(if_then_else:VF
+  [(set (match_operand:V_VLSF 0 "register_operand"           "=vd, vd, vr, vr")
+	(if_then_else:V_VLSF
 	  (unspec:<VM>
 	    [(match_operand:<VM> 1 "vector_mask_operand" " vm, vm,Wc1,Wc1")
 	     (match_operand 5 "vector_length_operand"    "rvl,rvl,rvl,rvl")
@@ -6453,11 +6453,11 @@
 	     (reg:SI VL_REGNUM)
 	     (reg:SI VTYPE_REGNUM)
 	     (reg:SI FRM_REGNUM)] UNSPEC_VPREDICATE)
-	  (non_commutative_float_binop:VF
-	    (match_operand:VF 3 "register_operand"       " vr, vr, vr, vr")
-	    (vec_duplicate:VF
+	  (non_commutative_float_binop:V_VLSF
+	    (match_operand:V_VLSF 3 "register_operand"       " vr, vr, vr, vr")
+	    (vec_duplicate:V_VLSF
 	      (match_operand:<VEL> 4 "register_operand"  "  f,  f,  f,  f")))
-	  (match_operand:VF 2 "vector_merge_operand"     " vu,  0, vu,  0")))]
+	  (match_operand:V_VLSF 2 "vector_merge_operand"     " vu,  0, vu,  0")))]
   "TARGET_VECTOR"
   "vf<insn>.vf\t%0,%3,%4%p1"
   [(set_attr "type" "<float_insn_type>")
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vls/floating-point-sub-2.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vls/floating-point-sub-2.c
index 8ddefc6..e8a1bc6 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vls/floating-point-sub-2.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vls/floating-point-sub-2.c
@@ -39,5 +39,5 @@ DEF_OP_VX (sub, 128, double, -)
 DEF_OP_VX (sub, 256, double, -)
 DEF_OP_VX (sub, 512, double, -)
 
-/* { dg-final { scan-assembler-times {vfsub\.vv\s+v[0-9]+,\s*v[0-9]+,\s*v[0-9]+} 30 } } */
+/* { dg-final { scan-assembler-times {vfsub\.vf\s+v[0-9]+,\s*v[0-9]+,\s*f[ast]?[0-9]+} 30 } } */
 /* { dg-final { scan-assembler-not {csrr} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f16.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f16.c
index ad3e199..002d091 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f16.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f16.c
@@ -18,6 +18,7 @@ DEF_VF_MULOP_WIDEN_CASE_0 (_Float16, float, +, -, nacc)
 DEF_VF_MULOP_WIDEN_CASE_0 (_Float16, float, -, -, nsac)
 DEF_VF_BINOP_CASE_0 (_Float16, *, mul)
 DEF_VF_BINOP_CASE_0 (_Float16, +, add)
+DEF_VF_BINOP_CASE_0 (_Float16, -, sub)
 DEF_VF_BINOP_REVERSE_CASE_0 (_Float16, /, rdiv)
 DEF_VF_BINOP_CASE_2_WRAP (_Float16, MIN_FUNC_0_WRAP (_Float16), min)
 DEF_VF_BINOP_CASE_2_WRAP (_Float16, MIN_FUNC_1_WRAP (_Float16), min)
@@ -39,6 +40,7 @@ DEF_VF_BINOP_WIDEN_CASE_0 (_Float16, float, *, mul)
 /* { dg-final { scan-assembler-times {vfwnmsac.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfmul.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfadd.vf} 1 } } */
+/* { dg-final { scan-assembler-times {vfsub.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfrdiv.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfmin.vf} 2 } } */
 /* { dg-final { scan-assembler-times {vfmax.vf} 2 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f32.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f32.c
index dae2d04..c8b323b 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f32.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f32.c
@@ -18,6 +18,7 @@ DEF_VF_MULOP_WIDEN_CASE_0 (float, double, +, -, nacc)
 DEF_VF_MULOP_WIDEN_CASE_0 (float, double, -, -, nsac)
 DEF_VF_BINOP_CASE_0 (float, *, mul)
 DEF_VF_BINOP_CASE_0 (float, +, add)
+DEF_VF_BINOP_CASE_0 (float, -, sub)
 DEF_VF_BINOP_REVERSE_CASE_0 (float, /, rdiv)
 DEF_VF_BINOP_CASE_2_WRAP (float, MIN_FUNC_0_WRAP (float), min)
 DEF_VF_BINOP_CASE_2_WRAP (float, MIN_FUNC_1_WRAP (float), min)
@@ -39,6 +40,7 @@ DEF_VF_BINOP_WIDEN_CASE_0 (float, double, *, mul)
 /* { dg-final { scan-assembler-times {vfwnmsac.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfmul.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfadd.vf} 1 } } */
+/* { dg-final { scan-assembler-times {vfsub.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfrdiv.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfmin.vf} 2 } } */
 /* { dg-final { scan-assembler-times {vfmax.vf} 2 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f64.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f64.c
index cb36ef8..0d04b92 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f64.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-1-f64.c
@@ -14,6 +14,7 @@ DEF_VF_MULOP_ACC_CASE_0 (double, +, -, nacc)
 DEF_VF_MULOP_ACC_CASE_0 (double, -, -, nsac)
 DEF_VF_BINOP_CASE_0 (double, *, mul)
 DEF_VF_BINOP_CASE_0 (double, +, add)
+DEF_VF_BINOP_CASE_0 (double, -, sub)
 DEF_VF_BINOP_REVERSE_CASE_0 (double, /, rdiv)
 DEF_VF_BINOP_CASE_2_WRAP (double, MIN_FUNC_0_WRAP (double), min)
 DEF_VF_BINOP_CASE_2_WRAP (double, MIN_FUNC_1_WRAP (double), min)
@@ -30,6 +31,7 @@ DEF_VF_BINOP_CASE_2_WRAP (double, MAX_FUNC_1_WRAP (double), max)
 /* { dg-final { scan-assembler-times {vfnmsac.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfmul.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfadd.vf} 1 } } */
+/* { dg-final { scan-assembler-times {vfsub.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfrdiv.vf} 1 } } */
 /* { dg-final { scan-assembler-times {vfmin.vf} 2 } } */
 /* { dg-final { scan-assembler-times {vfmax.vf} 2 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f16.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f16.c
index eebb69f..05361d81 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f16.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f16.c
@@ -17,6 +17,7 @@
 /* { dg-final { scan-assembler-not {vfwnmsac.vf} } } */
 /* { dg-final { scan-assembler-not {vfmul.vf} } } */
 /* { dg-final { scan-assembler-not {vfadd.vf} } } */
+/* { dg-final { scan-assembler-not {vfsub.vf} } } */
 /* { dg-final { scan-assembler-not {vfrdiv.vf} } } */
 /* { dg-final { scan-assembler-not {vfmin.vf} } } */
 /* { dg-final { scan-assembler-not {vfmax.vf} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f32.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f32.c
index 64ab5b1..085d872 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f32.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f32.c
@@ -17,6 +17,7 @@
 /* { dg-final { scan-assembler-not {vfwnmsac.vf} } } */
 /* { dg-final { scan-assembler-not {vfmul.vf} } } */
 /* { dg-final { scan-assembler-not {vfadd.vf} } } */
+/* { dg-final { scan-assembler-not {vfsub.vf} } } */
 /* { dg-final { scan-assembler-not {vfrdiv.vf} } } */
 /* { dg-final { scan-assembler-not {vfmin.vf} } } */
 /* { dg-final { scan-assembler-not {vfmax.vf} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f64.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f64.c
index b849717..49ad386 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f64.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-2-f64.c
@@ -13,6 +13,7 @@
 /* { dg-final { scan-assembler-not {vfnmsac.vf} } } */
 /* { dg-final { scan-assembler-not {vfmul.vf} } } */
 /* { dg-final { scan-assembler-not {vfadd.vf} } } */
+/* { dg-final { scan-assembler-not {vfsub.vf} } } */
 /* { dg-final { scan-assembler-not {vfrdiv.vf} } } */
 /* { dg-final { scan-assembler-not {vfmin.vf} } } */
 /* { dg-final { scan-assembler-not {vfmax.vf} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f16.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f16.c
index 12e779c..e1d7730 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f16.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f16.c
@@ -18,6 +18,7 @@ DEF_VF_MULOP_WIDEN_CASE_1 (_Float16, float, +, -, nacc)
 DEF_VF_MULOP_WIDEN_CASE_1 (_Float16, float, -, -, nsac)
 DEF_VF_BINOP_CASE_1 (_Float16, *, mul, VF_BINOP_BODY_X128)
 DEF_VF_BINOP_CASE_1 (_Float16, +, add, VF_BINOP_BODY_X128)
+DEF_VF_BINOP_CASE_1 (_Float16, -, sub, VF_BINOP_BODY_X128)
 DEF_VF_BINOP_REVERSE_CASE_1 (_Float16, /, rdiv, VF_BINOP_REVERSE_BODY_X128)
 DEF_VF_BINOP_CASE_3_WRAP (_Float16, MIN_FUNC_0_WRAP (_Float16), min,
 			  VF_BINOP_FUNC_BODY_X128)
@@ -43,6 +44,7 @@ DEF_VF_BINOP_WIDEN_CASE_1 (_Float16, float, *, mul)
 /* { dg-final { scan-assembler {vfwnmsac.vf} } } */
 /* { dg-final { scan-assembler {vfmul.vf} } } */
 /* { dg-final { scan-assembler {vfadd.vf} } } */
+/* { dg-final { scan-assembler {vfsub.vf} } } */
 /* { dg-final { scan-assembler {vfrdiv.vf} } } */
 /* { dg-final { scan-assembler {vfmin.vf} } } */
 /* { dg-final { scan-assembler {vfmax.vf} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f32.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f32.c
index 49ebc2b..bef9a2d 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f32.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f32.c
@@ -18,6 +18,7 @@ DEF_VF_MULOP_WIDEN_CASE_1 (float, double, +, -, nacc)
 DEF_VF_MULOP_WIDEN_CASE_1 (float, double, -, -, nsac)
 DEF_VF_BINOP_CASE_1 (float, *, mul, VF_BINOP_BODY_X128)
 DEF_VF_BINOP_CASE_1 (float, +, add, VF_BINOP_BODY_X128)
+DEF_VF_BINOP_CASE_1 (float, -, sub, VF_BINOP_BODY_X128)
 DEF_VF_BINOP_REVERSE_CASE_1 (float, /, rdiv, VF_BINOP_REVERSE_BODY_X128)
 DEF_VF_BINOP_CASE_3_WRAP (float, MIN_FUNC_0_WRAP (float), min,
 			  VF_BINOP_FUNC_BODY_X128)
@@ -43,6 +44,7 @@ DEF_VF_BINOP_WIDEN_CASE_1 (float, double, *, mul)
 /* { dg-final { scan-assembler {vfwnmsac.vf} } } */
 /* { dg-final { scan-assembler {vfmul.vf} } } */
 /* { dg-final { scan-assembler {vfadd.vf} } } */
+/* { dg-final { scan-assembler {vfsub.vf} } } */
 /* { dg-final { scan-assembler {vfrdiv.vf} } } */
 /* { dg-final { scan-assembler {vfmin.vf} } } */
 /* { dg-final { scan-assembler {vfmax.vf} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f64.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f64.c
index 9f898d2..861da77 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f64.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-3-f64.c
@@ -14,6 +14,7 @@ DEF_VF_MULOP_ACC_CASE_1 (double, +, -, nacc, VF_MULOP_ACC_BODY_X128)
 DEF_VF_MULOP_ACC_CASE_1 (double, -, -, nsac, VF_MULOP_ACC_BODY_X128)
 DEF_VF_BINOP_CASE_1 (double, *, mul, VF_BINOP_BODY_X128)
 DEF_VF_BINOP_CASE_1 (double, +, add, VF_BINOP_BODY_X128)
+DEF_VF_BINOP_CASE_1 (double, -, sub, VF_BINOP_BODY_X128)
 DEF_VF_BINOP_REVERSE_CASE_1 (double, /, rdiv, VF_BINOP_REVERSE_BODY_X128)
 DEF_VF_BINOP_CASE_3_WRAP (double, MIN_FUNC_0_WRAP (double), min,
 			  VF_BINOP_FUNC_BODY_X128)
@@ -34,6 +35,7 @@ DEF_VF_BINOP_CASE_3_WRAP (double, MAX_FUNC_1_WRAP (double), max,
 /* { dg-final { scan-assembler {vfnmsac.vf} } } */
 /* { dg-final { scan-assembler {vfmul.vf} } } */
 /* { dg-final { scan-assembler {vfadd.vf} } } */
+/* { dg-final { scan-assembler {vfsub.vf} } } */
 /* { dg-final { scan-assembler {vfrdiv.vf} } } */
 /* { dg-final { scan-assembler {vfmin.vf} } } */
 /* { dg-final { scan-assembler {vfmax.vf} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f16.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f16.c
index eab87ef..19456dc 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f16.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f16.c
@@ -17,6 +17,7 @@
 /* { dg-final { scan-assembler-not {vfwnmsac.vf} } } */
 /* { dg-final { scan-assembler-not {vfmul.vf} } } */
 /* { dg-final { scan-assembler-not {vfadd.vf} } } */
+/* { dg-final { scan-assembler-not {vfsub.vf} } } */
 /* { dg-final { scan-assembler-not {vfrdiv.vf} } } */
 /* { dg-final { scan-assembler-not {vfmin.vf} } } */
 /* { dg-final { scan-assembler-not {vfmax.vf} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f32.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f32.c
index 5cd4d57..9c3a59f 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f32.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f32.c
@@ -17,6 +17,7 @@
 /* { dg-final { scan-assembler-not {vfwnmsac.vf} } } */
 /* { dg-final { scan-assembler-not {vfmul.vf} } } */
 /* { dg-final { scan-assembler-not {vfadd.vf} } } */
+/* { dg-final { scan-assembler-not {vfsub.vf} } } */
 /* { dg-final { scan-assembler-not {vfrdiv.vf} } } */
 /* { dg-final { scan-assembler-not {vfmin.vf} } } */
 /* { dg-final { scan-assembler-not {vfmax.vf} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f64.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f64.c
index 437631c..14cf691 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f64.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf-4-f64.c
@@ -13,6 +13,7 @@
 /* { dg-final { scan-assembler-not {vfnmsac.vf} } } */
 /* { dg-final { scan-assembler-not {vfmul.vf} } } */
 /* { dg-final { scan-assembler-not {vfadd.vf} } } */
+/* { dg-final { scan-assembler-not {vfsub.vf} } } */
 /* { dg-final { scan-assembler-not {vfrdiv.vf} } } */
 /* { dg-final { scan-assembler-not {vfmin.vf} } } */
 /* { dg-final { scan-assembler-not {vfmax.vf} } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_binop_data.h b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_binop_data.h
index 48f7a26..d7f8d1d 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_binop_data.h
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_binop_data.h
@@ -300,6 +300,152 @@ double TEST_BINOP_DATA(double, add)[][4][N] =
     },
   },
 };
+_Float16 TEST_BINOP_DATA(_Float16, sub)[][4][N] =
+{
+  {
+    { 0x1.0000000000000p+0f16 },
+    {
+    0x1.8fc0000000000p+4f16, 0x1.8fc0000000000p+4f16, 0x1.8fc0000000000p+4f16, 0x1.8fc0000000000p+4f16,
+    0x1.b880000000000p+6f16, 0x1.b880000000000p+6f16, 0x1.b880000000000p+6f16, 0x1.b880000000000p+6f16,
+    0x1.a4c0000000000p+5f16, 0x1.a4c0000000000p+5f16, 0x1.a4c0000000000p+5f16, 0x1.a4c0000000000p+5f16,
+    0x1.6f80000000000p+4f16, 0x1.6f80000000000p+4f16, 0x1.6f80000000000p+4f16, 0x1.6f80000000000p+4f16,
+    },
+    {
+    0x1.7fc0000000000p+4f16, 0x1.7fc0000000000p+4f16, 0x1.7fc0000000000p+4f16, 0x1.7fc0000000000p+4f16,
+    0x1.b480000000000p+6f16, 0x1.b480000000000p+6f16, 0x1.b480000000000p+6f16, 0x1.b480000000000p+6f16,
+    0x1.9cc0000000000p+5f16, 0x1.9cc0000000000p+5f16, 0x1.9cc0000000000p+5f16, 0x1.9cc0000000000p+5f16,
+    0x1.5f80000000000p+4f16, 0x1.5f80000000000p+4f16, 0x1.5f80000000000p+4f16, 0x1.5f80000000000p+4f16,
+    },
+  },
+  {
+    { 0x1.9000000000000p+6f16 },
+    {
+    -0x1.53c0000000000p+5f16, -0x1.53c0000000000p+5f16, -0x1.53c0000000000p+5f16, -0x1.53c0000000000p+5f16,
+    0x1.c300000000000p+6f16, 0x1.c300000000000p+6f16, 0x1.c300000000000p+6f16, 0x1.c300000000000p+6f16,
+    -0x1.ffc0000000000p+7f16, -0x1.ffc0000000000p+7f16, -0x1.ffc0000000000p+7f16, -0x1.ffc0000000000p+7f16,
+    -0x1.94c0000000000p+6f16, -0x1.94c0000000000p+6f16, -0x1.94c0000000000p+6f16, -0x1.94c0000000000p+6f16,
+    },
+    {
+    -0x1.1d00000000000p+7f16, -0x1.1d00000000000p+7f16, -0x1.1d00000000000p+7f16, -0x1.1d00000000000p+7f16,
+    0x1.9800000000000p+3f16, 0x1.9800000000000p+3f16, 0x1.9800000000000p+3f16, 0x1.9800000000000p+3f16,
+    -0x1.63c0000000000p+8f16, -0x1.63c0000000000p+8f16, -0x1.63c0000000000p+8f16, -0x1.63c0000000000p+8f16,
+    -0x1.9240000000000p+7f16, -0x1.9240000000000p+7f16, -0x1.9240000000000p+7f16, -0x1.9240000000000p+7f16,
+    },
+  },
+  {
+    { -0x1.9000000000000p+6f16 },
+    {
+    -0x1.0600000000000p+5f16, -0x1.0600000000000p+5f16, -0x1.0600000000000p+5f16, -0x1.0600000000000p+5f16,
+    -0x1.e540000000000p+7f16, -0x1.e540000000000p+7f16, -0x1.e540000000000p+7f16, -0x1.e540000000000p+7f16,
+    0x1.96c0000000000p+4f16, 0x1.96c0000000000p+4f16, 0x1.96c0000000000p+4f16, 0x1.96c0000000000p+4f16,
+    -0x1.08c0000000000p+5f16, -0x1.08c0000000000p+5f16, -0x1.08c0000000000p+5f16, -0x1.08c0000000000p+5f16,
+    },
+    {
+    0x1.0d00000000000p+6f16, 0x1.0d00000000000p+6f16, 0x1.0d00000000000p+6f16, 0x1.0d00000000000p+6f16,
+    -0x1.1d40000000000p+7f16, -0x1.1d40000000000p+7f16, -0x1.1d40000000000p+7f16, -0x1.1d40000000000p+7f16,
+    0x1.f5c0000000000p+6f16, 0x1.f5c0000000000p+6f16, 0x1.f5c0000000000p+6f16, 0x1.f5c0000000000p+6f16,
+    0x1.0b80000000000p+6f16, 0x1.0b80000000000p+6f16, 0x1.0b80000000000p+6f16, 0x1.0b80000000000p+6f16,
+    },
+  },
+};
+
+float TEST_BINOP_DATA(float, sub)[][4][N] =
+{
+  {
+    { 0x1.1c37940000000p+53f },
+    {
+    0x1.8fe1540000000p+60f, 0x1.8fe1540000000p+60f, 0x1.8fe1540000000p+60f, 0x1.8fe1540000000p+60f,
+    0x1.b8b5320000000p+62f, 0x1.b8b5320000000p+62f, 0x1.b8b5320000000p+62f, 0x1.b8b5320000000p+62f,
+    0x1.a4eb340000000p+61f, 0x1.a4eb340000000p+61f, 0x1.a4eb340000000p+61f, 0x1.a4eb340000000p+61f,
+    0x1.6faeda0000000p+60f, 0x1.6faeda0000000p+60f, 0x1.6faeda0000000p+60f, 0x1.6faeda0000000p+60f,
+    },
+    {
+    0x1.8da8e60000000p+60f, 0x1.8da8e60000000p+60f, 0x1.8da8e60000000p+60f, 0x1.8da8e60000000p+60f,
+    0x1.b827160000000p+62f, 0x1.b827160000000p+62f, 0x1.b827160000000p+62f, 0x1.b827160000000p+62f,
+    0x1.a3cefc0000000p+61f, 0x1.a3cefc0000000p+61f, 0x1.a3cefc0000000p+61f, 0x1.a3cefc0000000p+61f,
+    0x1.6d766a0000000p+60f, 0x1.6d766a0000000p+60f, 0x1.6d766a0000000p+60f, 0x1.6d766a0000000p+60f,
+    },
+  },
+  {
+    { 0x1.158e460000000p+63f },
+    {
+    -0x1.53e0ba0000000p+61f, -0x1.53e0ba0000000p+61f, -0x1.53e0ba0000000p+61f, -0x1.53e0ba0000000p+61f,
+    0x1.c3397c0000000p+62f, 0x1.c3397c0000000p+62f, 0x1.c3397c0000000p+62f, 0x1.c3397c0000000p+62f,
+    -0x1.ffe2020000000p+63f, -0x1.ffe2020000000p+63f, -0x1.ffe2020000000p+63f, -0x1.ffe2020000000p+63f,
+    -0x1.94d2a80000000p+62f, -0x1.94d2a80000000p+62f, -0x1.94d2a80000000p+62f, -0x1.94d2a80000000p+62f,
+    },
+    {
+    -0x1.6a86740000000p+63f, -0x1.6a86740000000p+63f, -0x1.6a86740000000p+63f, -0x1.6a86740000000p+63f,
+    -0x1.9f8c440000000p+60f, -0x1.9f8c440000000p+60f, -0x1.9f8c440000000p+60f, -0x1.9f8c440000000p+60f,
+    -0x1.8ab8240000000p+64f, -0x1.8ab8240000000p+64f, -0x1.8ab8240000000p+64f, -0x1.8ab8240000000p+64f,
+    -0x1.dff79a0000000p+63f, -0x1.dff79a0000000p+63f, -0x1.dff79a0000000p+63f, -0x1.dff79a0000000p+63f,
+    },
+  },
+  {
+    { -0x1.158e460000000p+63f },
+    {
+    -0x1.53e0ba0000000p+61f, -0x1.53e0ba0000000p+61f, -0x1.53e0ba0000000p+61f, -0x1.53e0ba0000000p+61f,
+    0x1.c3397c0000000p+62f, 0x1.c3397c0000000p+62f, 0x1.c3397c0000000p+62f, 0x1.c3397c0000000p+62f,
+    -0x1.ffe2020000000p+63f, -0x1.ffe2020000000p+63f, -0x1.ffe2020000000p+63f, -0x1.ffe2020000000p+63f,
+    -0x1.94d2a80000000p+62f, -0x1.94d2a80000000p+62f, -0x1.94d2a80000000p+62f, -0x1.94d2a80000000p+62f,
+    },
+    {
+    0x1.812c2e0000000p+62f, 0x1.812c2e0000000p+62f, 0x1.812c2e0000000p+62f, 0x1.812c2e0000000p+62f,
+    0x1.f72b040000000p+63f, 0x1.f72b040000000p+63f, 0x1.f72b040000000p+63f, 0x1.f72b040000000p+63f,
+    -0x1.d4a7780000000p+62f, -0x1.d4a7780000000p+62f, -0x1.d4a7780000000p+62f, -0x1.d4a7780000000p+62f,
+    0x1.2c93ca0000000p+61f, 0x1.2c93ca0000000p+61f, 0x1.2c93ca0000000p+61f, 0x1.2c93ca0000000p+61f,
+    },
+  },
+};
+
+double TEST_BINOP_DATA(double, sub)[][4][N] =
+{
+  {
+    { 0x1.12f1bbdb4d470p+508 },
+    {
+    0x1.8fe1565f12a78p+508, 0x1.8fe1565f12a78p+508, 0x1.8fe1565f12a78p+508, 0x1.8fe1565f12a78p+508,
+    0x1.b8b533d821ccap+510, 0x1.b8b533d821ccap+510, 0x1.b8b533d821ccap+510, 0x1.b8b533d821ccap+510,
+    0x1.a4eb35b744a54p+509, 0x1.a4eb35b744a54p+509, 0x1.a4eb35b744a54p+509, 0x1.a4eb35b744a54p+509,
+    0x1.6faedb6395f48p+508, 0x1.6faedb6395f48p+508, 0x1.6faedb6395f48p+508, 0x1.6faedb6395f48p+508,
+    },
+    {
+    0x1.f3be6a0f15820p+506, 0x1.f3be6a0f15820p+506, 0x1.f3be6a0f15820p+506, 0x1.f3be6a0f15820p+506,
+    0x1.73f8c4e14e7aep+510, 0x1.73f8c4e14e7aep+510, 0x1.73f8c4e14e7aep+510, 0x1.73f8c4e14e7aep+510,
+    0x1.1b7257c99e01cp+509, 0x1.1b7257c99e01cp+509, 0x1.1b7257c99e01cp+509, 0x1.1b7257c99e01cp+509,
+    0x1.72f47e2122b60p+506, 0x1.72f47e2122b60p+506, 0x1.72f47e2122b60p+506, 0x1.72f47e2122b60p+506,
+    },
+  },
+  {
+    { 0x1.57ae2ad22098cp+511 },
+    {
+    -0x1.53e0bc0170fe8p+509, -0x1.53e0bc0170fe8p+509, -0x1.53e0bc0170fe8p+509, -0x1.53e0bc0170fe8p+509,
+    0x1.c3397ceebc142p+510, 0x1.c3397ceebc142p+510, 0x1.c3397ceebc142p+510, 0x1.c3397ceebc142p+510,
+    -0x1.ffe2046f999e3p+511, -0x1.ffe2046f999e3p+511, -0x1.ffe2046f999e3p+511, -0x1.ffe2046f999e3p+511,
+    -0x1.94d2a9003ee18p+510, -0x1.94d2a9003ee18p+510, -0x1.94d2a9003ee18p+510, -0x1.94d2a9003ee18p+510,
+    },
+    {
+    -0x1.aca659d27cd86p+511, -0x1.aca659d27cd86p+511, -0x1.aca659d27cd86p+511, -0x1.aca659d27cd86p+511,
+    -0x1.d845b16b0a3acp+509, -0x1.d845b16b0a3acp+509, -0x1.d845b16b0a3acp+509, -0x1.d845b16b0a3acp+509,
+    -0x1.abc817a0dd1b8p+512, -0x1.abc817a0dd1b8p+512, -0x1.abc817a0dd1b8p+512, -0x1.abc817a0dd1b8p+512,
+    -0x1.110bbfa92004cp+512, -0x1.110bbfa92004cp+512, -0x1.110bbfa92004cp+512, -0x1.110bbfa92004cp+512,
+    },
+  },
+  {
+    { -0x1.57ae2ad22098cp+511 },
+    {
+    -0x1.062a35a13cec0p+509, -0x1.062a35a13cec0p+509, -0x1.062a35a13cec0p+509, -0x1.062a35a13cec0p+509,
+    -0x1.e5739808c344dp+511, -0x1.e5739808c344dp+511, -0x1.e5739808c344dp+511, -0x1.e5739808c344dp+511,
+    0x1.96d5c3ca79e38p+508, 0x1.96d5c3ca79e38p+508, 0x1.96d5c3ca79e38p+508, 0x1.96d5c3ca79e38p+508,
+    -0x1.08eb6307cef78p+509, -0x1.08eb6307cef78p+509, -0x1.08eb6307cef78p+509, -0x1.08eb6307cef78p+509,
+    },
+    {
+    0x1.16239d69d15dcp+511, 0x1.16239d69d15dcp+511, 0x1.16239d69d15dcp+511, 0x1.16239d69d15dcp+511,
+    -0x1.1b8ada6d45582p+510, -0x1.1b8ada6d45582p+510, -0x1.1b8ada6d45582p+510, -0x1.1b8ada6d45582p+510,
+    0x1.8a88e34b6fd53p+511, 0x1.8a88e34b6fd53p+511, 0x1.8a88e34b6fd53p+511, 0x1.8a88e34b6fd53p+511,
+    0x1.157352102cdaep+511, 0x1.157352102cdaep+511, 0x1.157352102cdaep+511, 0x1.157352102cdaep+511,
+    },
+  },
+};
 
 _Float16 TEST_BINOP_DATA(_Float16, rdiv)[][4][N] =
 {
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f16.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f16.c
new file mode 100644
index 0000000..4428e43
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f16.c
@@ -0,0 +1,19 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-require-effective-target riscv_v_ok } */
+/* { dg-require-effective-target riscv_zvfh_ok } */
+/* { dg-add-options "riscv_v" } */
+/* { dg-add-options "riscv_zvfh" } */
+/* { dg-additional-options "--param=fpr2vr-cost=0" } */
+
+#include "vf_binop.h"
+#include "vf_binop_data.h"
+
+#define T    _Float16
+#define NAME sub
+
+DEF_VF_BINOP_CASE_0_WRAP (T, -, NAME)
+
+#define TEST_DATA                        TEST_BINOP_DATA_WRAP(T, NAME)
+#define TEST_RUN(T, NAME, out, in, f, n) RUN_VF_BINOP_CASE_0_WRAP(T, NAME, out, in, f, n)
+
+#include "vf_binop_run.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f32.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f32.c
new file mode 100644
index 0000000..bcfdcc2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f32.c
@@ -0,0 +1,15 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=fpr2vr-cost=0" } */
+
+#include "vf_binop.h"
+#include "vf_binop_data.h"
+
+#define T    float
+#define NAME sub
+
+DEF_VF_BINOP_CASE_0_WRAP (T, -, NAME)
+
+#define TEST_DATA                        TEST_BINOP_DATA_WRAP(T, NAME)
+#define TEST_RUN(T, NAME, out, in, f, n) RUN_VF_BINOP_CASE_0_WRAP(T, NAME, out, in, f, n)
+
+#include "vf_binop_run.h"
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f64.c b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f64.c
new file mode 100644
index 0000000..fee8ecf
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/autovec/vx_vf/vf_vfsub-run-1-f64.c
@@ -0,0 +1,15 @@
+/* { dg-do run { target { riscv_v } } } */
+/* { dg-additional-options "--param=fpr2vr-cost=0" } */
+
+#include "vf_binop.h"
+#include "vf_binop_data.h"
+
+#define T    double
+#define NAME sub
+
+DEF_VF_BINOP_CASE_0_WRAP (T, -, NAME)
+
+#define TEST_DATA                        TEST_BINOP_DATA_WRAP(T, NAME)
+#define TEST_RUN(T, NAME, out, in, f, n) RUN_VF_BINOP_CASE_0_WRAP(T, NAME, out, in, f, n)
+
+#include "vf_binop_run.h"