[PATCH] RISC-V: Refactor requirement of ZVFH and ZVFHMIN.

[pan2.li@intel.com]

From: Pan Li <pan2.li@intel.com>

This patch would like to refactor the requirement of both the ZVFH
and ZVFHMIN. The related define_insn and iterator will take the
requirement based on the ZVFHMIN and ZVFH.

Please note the ZVFH will cover the ZVFHMIN instructions. This patch
add one test for this.

Signed-off-by: Pan Li <pan2.li@intel.com>

gcc/ChangeLog:

	* config/riscv/vector-iterators.md: Add requirement to VF,
	VWEXTF and VWCONVERTI, add V_CONVERT_F and VCONVERTF.
	* config/riscv/vector.md: Adjust FP convert to V_CONVERT_F
	and VCONVERTF, and fix V_WHOLE and V_FRACT.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/base/zvfh-over-zvfhmin.c: New test.
---
 gcc/config/riscv/vector-iterators.md          | 79 +++++++++++++------
 gcc/config/riscv/vector.md                    | 46 +++++------
 .../riscv/rvv/base/zvfh-over-zvfhmin.c        | 25 ++++++
 3 files changed, 104 insertions(+), 46 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/zvfh-over-zvfhmin.c

diff --git a/gcc/config/riscv/vector-iterators.md b/gcc/config/riscv/vector-iterators.md
index f4946d84449..0e580c5a9c4 100644
--- a/gcc/config/riscv/vector-iterators.md
+++ b/gcc/config/riscv/vector-iterators.md
@@ -296,13 +296,13 @@ (define_mode_iterator VWI_ZVE32 [
 ])
 
 (define_mode_iterator VF [
-  (VNx1HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN < 128")
-  (VNx2HF "TARGET_VECTOR_ELEN_FP_16")
-  (VNx4HF "TARGET_VECTOR_ELEN_FP_16")
-  (VNx8HF "TARGET_VECTOR_ELEN_FP_16")
-  (VNx16HF "TARGET_VECTOR_ELEN_FP_16")
-  (VNx32HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN > 32")
-  (VNx64HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN >= 128")
+  (VNx1HF "TARGET_ZVFH && TARGET_MIN_VLEN < 128")
+  (VNx2HF "TARGET_ZVFH")
+  (VNx4HF "TARGET_ZVFH")
+  (VNx8HF "TARGET_ZVFH")
+  (VNx16HF "TARGET_ZVFH")
+  (VNx32HF "TARGET_ZVFH && TARGET_MIN_VLEN > 32")
+  (VNx64HF "TARGET_ZVFH && TARGET_MIN_VLEN >= 128")
 
   (VNx1SF "TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN < 128")
   (VNx2SF "TARGET_VECTOR_ELEN_FP_32")
@@ -453,9 +453,8 @@ (define_mode_iterator V_WHOLE [
   (VNx1DI "TARGET_VECTOR_ELEN_64 && TARGET_MIN_VLEN < 128") (VNx2DI "TARGET_VECTOR_ELEN_64")
   (VNx4DI "TARGET_VECTOR_ELEN_64") (VNx8DI "TARGET_VECTOR_ELEN_64") (VNx16DI "TARGET_VECTOR_ELEN_64 && TARGET_MIN_VLEN >= 128")
 
-  (VNx1HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN < 128")
-  (VNx2HF "TARGET_VECTOR_ELEN_FP_16")
-  (VNx4HF "TARGET_VECTOR_ELEN_FP_16")
+  (VNx2HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN == 32")
+  (VNx4HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN == 64")
   (VNx8HF "TARGET_VECTOR_ELEN_FP_16")
   (VNx16HF "TARGET_VECTOR_ELEN_FP_16")
   (VNx32HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN > 32")
@@ -477,7 +476,11 @@ (define_mode_iterator V_WHOLE [
 (define_mode_iterator V_FRACT [
   (VNx1QI "TARGET_MIN_VLEN < 128") VNx2QI (VNx4QI "TARGET_MIN_VLEN > 32") (VNx8QI "TARGET_MIN_VLEN >= 128")
   (VNx1HI "TARGET_MIN_VLEN < 128") (VNx2HI "TARGET_MIN_VLEN > 32") (VNx4HI "TARGET_MIN_VLEN >= 128")
-  (VNx1HF "TARGET_MIN_VLEN < 128") (VNx2HF "TARGET_MIN_VLEN > 32") (VNx4HF "TARGET_MIN_VLEN >= 128")
+
+  (VNx1HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN < 128")
+  (VNx2HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN > 32")
+  (VNx4HF "TARGET_VECTOR_ELEN_FP_16 && TARGET_MIN_VLEN >= 128")
+
   (VNx1SI "TARGET_MIN_VLEN > 32 && TARGET_MIN_VLEN < 128") (VNx2SI "TARGET_MIN_VLEN >= 128")
   (VNx1SF "TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN > 32 && TARGET_MIN_VLEN < 128")
   (VNx2SF "TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN >= 128")
@@ -497,12 +500,12 @@ (define_mode_iterator VWEXTI [
 ])
 
 (define_mode_iterator VWEXTF [
-  (VNx1SF "TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN < 128")
-  (VNx2SF "TARGET_VECTOR_ELEN_FP_32")
-  (VNx4SF "TARGET_VECTOR_ELEN_FP_32")
-  (VNx8SF "TARGET_VECTOR_ELEN_FP_32")
-  (VNx16SF "TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN > 32")
-  (VNx32SF "TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN >= 128")
+  (VNx1SF "TARGET_ZVFH && TARGET_MIN_VLEN < 128")
+  (VNx2SF "TARGET_ZVFH")
+  (VNx4SF "TARGET_ZVFH")
+  (VNx8SF "TARGET_ZVFH")
+  (VNx16SF "TARGET_ZVFH && TARGET_MIN_VLEN > 32")
+  (VNx32SF "TARGET_ZVFH && TARGET_MIN_VLEN >= 128")
 
   (VNx1DF "TARGET_VECTOR_ELEN_FP_64 && TARGET_MIN_VLEN < 128")
   (VNx2DF "TARGET_VECTOR_ELEN_FP_64")
@@ -512,12 +515,12 @@ (define_mode_iterator VWEXTF [
 ])
 
 (define_mode_iterator VWCONVERTI [
-  (VNx1SI "TARGET_MIN_VLEN < 128 && TARGET_VECTOR_ELEN_FP_16")
-  (VNx2SI "TARGET_VECTOR_ELEN_FP_16")
-  (VNx4SI "TARGET_VECTOR_ELEN_FP_16")
-  (VNx8SI "TARGET_VECTOR_ELEN_FP_16")
-  (VNx16SI "TARGET_MIN_VLEN > 32 && TARGET_VECTOR_ELEN_FP_16")
-  (VNx32SI "TARGET_MIN_VLEN >= 128 && TARGET_VECTOR_ELEN_FP_16")
+  (VNx1SI "TARGET_ZVFH && TARGET_MIN_VLEN < 128")
+  (VNx2SI "TARGET_ZVFH")
+  (VNx4SI "TARGET_ZVFH")
+  (VNx8SI "TARGET_ZVFH")
+  (VNx16SI "TARGET_ZVFH && TARGET_MIN_VLEN > 32")
+  (VNx32SI "TARGET_ZVFH && TARGET_MIN_VLEN >= 128")
 
   (VNx1DI "TARGET_VECTOR_ELEN_64 && TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN < 128")
   (VNx2DI "TARGET_VECTOR_ELEN_64 && TARGET_VECTOR_ELEN_FP_32")
@@ -526,6 +529,21 @@ (define_mode_iterator VWCONVERTI [
   (VNx16DI "TARGET_VECTOR_ELEN_64 && TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN >= 128")
 ])
 
+(define_mode_iterator VCONVERTF [
+  (VNx1SF "TARGET_VECTOR_ELEN_FP_16 && TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN < 128")
+  (VNx2SF "TARGET_VECTOR_ELEN_FP_16 && TARGET_VECTOR_ELEN_FP_32")
+  (VNx4SF "TARGET_VECTOR_ELEN_FP_16 && TARGET_VECTOR_ELEN_FP_32")
+  (VNx8SF "TARGET_VECTOR_ELEN_FP_16 && TARGET_VECTOR_ELEN_FP_32")
+  (VNx16SF "TARGET_VECTOR_ELEN_FP_16 && TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN > 32")
+  (VNx32SF "TARGET_VECTOR_ELEN_FP_16 && TARGET_VECTOR_ELEN_FP_32 && TARGET_MIN_VLEN >= 128")
+
+  (VNx1DF "TARGET_VECTOR_ELEN_FP_64 && TARGET_MIN_VLEN < 128")
+  (VNx2DF "TARGET_VECTOR_ELEN_FP_64")
+  (VNx4DF "TARGET_VECTOR_ELEN_FP_64")
+  (VNx8DF "TARGET_VECTOR_ELEN_FP_64")
+  (VNx16DF "TARGET_VECTOR_ELEN_FP_64 && TARGET_MIN_VLEN >= 128")
+])
+
 (define_mode_iterator VQEXTI [
   (VNx1SI "TARGET_MIN_VLEN < 128") VNx2SI VNx4SI VNx8SI (VNx16SI "TARGET_MIN_VLEN > 32") (VNx32SI "TARGET_MIN_VLEN >= 128")
   (VNx1DI "TARGET_VECTOR_ELEN_64 && TARGET_MIN_VLEN < 128") (VNx2DI "TARGET_VECTOR_ELEN_64")
@@ -1181,6 +1199,21 @@ (define_mode_attr V_DOUBLE_TRUNC [
   (VNx16DF "VNx16SF")
 ])
 
+(define_mode_attr V_CONVERT_F [
+  (VNx1SF "VNx1HF")
+  (VNx2SF "VNx2HF")
+  (VNx4SF "VNx4HF")
+  (VNx8SF "VNx8HF")
+  (VNx16SF "VNx16HF")
+  (VNx32SF "VNx32HF")
+
+  (VNx1DF "VNx1SF")
+  (VNx2DF "VNx2SF")
+  (VNx4DF "VNx4SF")
+  (VNx8DF "VNx8SF")
+  (VNx16DF "VNx16SF")
+])
+
 (define_mode_attr V_QUAD_TRUNC [
   (VNx1SI "VNx1QI") (VNx2SI "VNx2QI") (VNx4SI "VNx4QI") (VNx8SI "VNx8QI")
   (VNx16SI "VNx16QI") (VNx32SI "VNx32QI")
diff --git a/gcc/config/riscv/vector.md b/gcc/config/riscv/vector.md
index 1d1847bd85a..97162b07642 100644
--- a/gcc/config/riscv/vector.md
+++ b/gcc/config/riscv/vector.md
@@ -7106,23 +7106,23 @@ (define_insn "@pred_widen_<float_cvt><mode>"
    (set_attr "mode" "<VNCONVERT>")])
 
 (define_insn "@pred_extend<mode>"
-  [(set (match_operand:VWEXTF 0 "register_operand"                 "=&vr,  &vr")
-	(if_then_else:VWEXTF
+  [(set (match_operand:VCONVERTF 0 "register_operand"          "=&vr,  &vr")
+	(if_then_else:VCONVERTF
 	  (unspec:<VM>
-	    [(match_operand:<VM> 1 "vector_mask_operand"          "vmWc1,vmWc1")
-	     (match_operand 4 "vector_length_operand"             "   rK,   rK")
-	     (match_operand 5 "const_int_operand"                 "    i,    i")
-	     (match_operand 6 "const_int_operand"                 "    i,    i")
-	     (match_operand 7 "const_int_operand"                 "    i,    i")
+	    [(match_operand:<VM> 1 "vector_mask_operand"       "vmWc1,vmWc1")
+	     (match_operand 4 "vector_length_operand"          "   rK,   rK")
+	     (match_operand 5 "const_int_operand"              "    i,    i")
+	     (match_operand 6 "const_int_operand"              "    i,    i")
+	     (match_operand 7 "const_int_operand"              "    i,    i")
 	     (reg:SI VL_REGNUM)
 	     (reg:SI VTYPE_REGNUM)] UNSPEC_VPREDICATE)
-	  (float_extend:VWEXTF
-	     (match_operand:<V_DOUBLE_TRUNC> 3 "register_operand" "   vr,   vr"))
-	  (match_operand:VWEXTF 2 "vector_merge_operand"          "   vu,    0")))]
+	  (float_extend:VCONVERTF
+	     (match_operand:<V_CONVERT_F> 3 "register_operand" "   vr,   vr"))
+	  (match_operand:VCONVERTF 2 "vector_merge_operand"    "   vu,    0")))]
   "TARGET_VECTOR"
   "vfwcvt.f.f.v\t%0,%3%p1"
   [(set_attr "type" "vfwcvtftof")
-   (set_attr "mode" "<V_DOUBLE_TRUNC>")])
+   (set_attr "mode" "<V_CONVERT_F>")])
 
 ;; -------------------------------------------------------------------------------
 ;; ---- Predicated floating-point narrow conversions
@@ -7193,25 +7193,25 @@ (define_insn "@pred_narrow_<float_cvt><mode>"
    (set_attr "mode" "<VNCONVERT>")])
 
 (define_insn "@pred_trunc<mode>"
-  [(set (match_operand:<V_DOUBLE_TRUNC> 0 "register_operand"       "=vd, vd, vr, vr,  &vr,  &vr")
-	(if_then_else:<V_DOUBLE_TRUNC>
+  [(set (match_operand:<V_CONVERT_F> 0 "register_operand"       "=vd, vd, vr, vr,  &vr,  &vr")
+	(if_then_else:<V_CONVERT_F>
 	  (unspec:<VM>
-	    [(match_operand:<VM> 1 "vector_mask_operand"           " vm, vm,Wc1,Wc1,vmWc1,vmWc1")
-	     (match_operand 4 "vector_length_operand"              " rK, rK, rK, rK,   rK,   rK")
-	     (match_operand 5 "const_int_operand"                  "  i,  i,  i,  i,    i,    i")
-	     (match_operand 6 "const_int_operand"                  "  i,  i,  i,  i,    i,    i")
-	     (match_operand 7 "const_int_operand"                  "  i,  i,  i,  i,    i,    i")
-	     (match_operand 8 "const_int_operand"                  "  i,  i,  i,  i,    i,    i")
+	    [(match_operand:<VM> 1 "vector_mask_operand"        " vm, vm,Wc1,Wc1,vmWc1,vmWc1")
+	     (match_operand 4 "vector_length_operand"           " rK, rK, rK, rK,   rK,   rK")
+	     (match_operand 5 "const_int_operand"               "  i,  i,  i,  i,    i,    i")
+	     (match_operand 6 "const_int_operand"               "  i,  i,  i,  i,    i,    i")
+	     (match_operand 7 "const_int_operand"               "  i,  i,  i,  i,    i,    i")
+	     (match_operand 8 "const_int_operand"               "  i,  i,  i,  i,    i,    i")
 	     (reg:SI VL_REGNUM)
 	     (reg:SI VTYPE_REGNUM)
 	     (reg:SI FRM_REGNUM)] UNSPEC_VPREDICATE)
-	  (float_truncate:<V_DOUBLE_TRUNC>
-	     (match_operand:VWEXTF 3 "register_operand"            "  0,  0,  0,  0,   vr,   vr"))
-	  (match_operand:<V_DOUBLE_TRUNC> 2 "vector_merge_operand" " vu,  0, vu,  0,   vu,    0")))]
+	  (float_truncate:<V_CONVERT_F>
+	     (match_operand:VCONVERTF 3 "register_operand"      "  0,  0,  0,  0,   vr,   vr"))
+	  (match_operand:<V_CONVERT_F> 2 "vector_merge_operand" " vu,  0, vu,  0,   vu,    0")))]
   "TARGET_VECTOR"
   "vfncvt.f.f.w\t%0,%3%p1"
   [(set_attr "type" "vfncvtftof")
-   (set_attr "mode" "<V_DOUBLE_TRUNC>")])
+   (set_attr "mode" "<V_CONVERT_F>")])
 
 (define_insn "@pred_rod_trunc<mode>"
   [(set (match_operand:<V_DOUBLE_TRUNC> 0 "register_operand"       "=vd, vd, vr, vr,  &vr,  &vr")
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/zvfh-over-zvfhmin.c b/gcc/testsuite/gcc.target/riscv/rvv/base/zvfh-over-zvfhmin.c
new file mode 100644
index 00000000000..32d6657775c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/zvfh-over-zvfhmin.c
@@ -0,0 +1,25 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv_zvfh -mabi=lp64 -O3" } */
+
+#include "riscv_vector.h"
+
+vfloat16mf4_t test_vfncvt_f_f_w_f16mf4(vfloat32mf2_t src, size_t vl) {
+  return __riscv_vfncvt_f_f_w_f16mf4(src, vl);
+}
+
+vfloat16m4_t test_vfncvt_f_f_w_f16m4(vfloat32m8_t src, size_t vl) {
+  return __riscv_vfncvt_f_f_w_f16m4(src, vl);
+}
+
+vfloat32mf2_t test_vfwcvt_f_f_v_f32mf2(vfloat16mf4_t src, size_t vl) {
+  return __riscv_vfwcvt_f_f_v_f32mf2(src, vl);
+}
+
+vfloat32m8_t test_vfwcvt_f_f_v_f32m8(vfloat16m4_t src, size_t vl) {
+  return __riscv_vfwcvt_f_f_v_f32m8(src, vl);
+}
+
+/* { dg-final { scan-assembler-times {vsetvli\s+zero,\s*[a-x0-9]+,\s*e16,\s*mf4,\s*t[au],\s*m[au]} 2 } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+zero,\s*[a-x0-9]+,\s*e16,\s*m4,\s*t[au],\s*m[au]} 2 } } */
+/* { dg-final { scan-assembler-times {vfwcvt\.f\.f\.v\s+v[0-9]+,\s*v[0-9]+} 2 } } */
+/* { dg-final { scan-assembler-times {vfncvt\.f\.f\.w\s+v[0-9]+,\s*v[0-9]+} 2 } } */
-- 
2.34.1