[gcc r14-1530] RISC-V: Support RVV FP16 ZVFHMIN intrinsic API

[Pan Li <panli@gcc.gnu.org>]

https://gcc.gnu.org/g:5c9cffa3a4aeeac1e462dbc8a35a5c4986f3381e

commit r14-1530-g5c9cffa3a4aeeac1e462dbc8a35a5c4986f3381e
Author: Pan Li <pan2.li@intel.com>
Date:   Sun Jun 4 14:15:15 2023 +0800

    RISC-V: Support RVV FP16 ZVFHMIN intrinsic API
    
    This patch support the 2 intrinsic API of FP16 ZVFHMIN extension. Aka
    SEW=16 for below instructions
    
    vfwcvt.f.f.v
    vfncvt.f.f.w
    
    Then users can leverage the instrinsic APIs to perform the conversion
    between RVV vector single float point and half float point.
    
    Signed-off-by: Pan Li <pan2.li@intel.com>
    
    gcc/ChangeLog:
    
            * config/riscv/riscv-vector-builtins-types.def
            (vfloat32mf2_t): Add vfloat32mf2_t type to vfncvt.f.f.w operations.
            (vfloat32m1_t): Likewise.
            (vfloat32m2_t): Likewise.
            (vfloat32m4_t): Likewise.
            (vfloat32m8_t): Likewise.
            * config/riscv/riscv-vector-builtins.def: Fix typo in comments.
            * config/riscv/vector-iterators.md: Add single to half machine
            mode conversion.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/riscv/rvv/base/zvfhmin-intrinsic.c: New test.

Diff:
---
 gcc/config/riscv/riscv-vector-builtins-types.def   |  6 +++
 gcc/config/riscv/riscv-vector-builtins.def         |  2 +-
 gcc/config/riscv/vector-iterators.md               | 10 ++++
 .../gcc.target/riscv/rvv/base/zvfhmin-intrinsic.c  | 53 ++++++++++++++++++++++
 4 files changed, 70 insertions(+), 1 deletion(-)

diff --git a/gcc/config/riscv/riscv-vector-builtins-types.def b/gcc/config/riscv/riscv-vector-builtins-types.def
index 65716b8c637..9cb3aca992e 100644
--- a/gcc/config/riscv/riscv-vector-builtins-types.def
+++ b/gcc/config/riscv/riscv-vector-builtins-types.def
@@ -553,6 +553,12 @@ DEF_RVV_WCONVERT_U_OPS (vuint64m2_t, RVV_REQUIRE_ELEN_FP_32 | RVV_REQUIRE_ELEN_6
 DEF_RVV_WCONVERT_U_OPS (vuint64m4_t, RVV_REQUIRE_ELEN_FP_32 | RVV_REQUIRE_ELEN_64)
 DEF_RVV_WCONVERT_U_OPS (vuint64m8_t, RVV_REQUIRE_ELEN_FP_32 | RVV_REQUIRE_ELEN_64)
 
+DEF_RVV_WCONVERT_F_OPS (vfloat32mf2_t, RVV_REQUIRE_ELEN_FP_32 | RVV_REQUIRE_MIN_VLEN_64)
+DEF_RVV_WCONVERT_F_OPS (vfloat32m1_t, RVV_REQUIRE_ELEN_FP_32)
+DEF_RVV_WCONVERT_F_OPS (vfloat32m2_t, RVV_REQUIRE_ELEN_FP_32)
+DEF_RVV_WCONVERT_F_OPS (vfloat32m4_t, RVV_REQUIRE_ELEN_FP_32)
+DEF_RVV_WCONVERT_F_OPS (vfloat32m8_t, RVV_REQUIRE_ELEN_FP_32)
+
 DEF_RVV_WCONVERT_F_OPS (vfloat64m1_t, RVV_REQUIRE_ELEN_FP_64)
 DEF_RVV_WCONVERT_F_OPS (vfloat64m2_t, RVV_REQUIRE_ELEN_FP_64)
 DEF_RVV_WCONVERT_F_OPS (vfloat64m4_t, RVV_REQUIRE_ELEN_FP_64)
diff --git a/gcc/config/riscv/riscv-vector-builtins.def b/gcc/config/riscv/riscv-vector-builtins.def
index 149835f36ac..310edeaf5a9 100644
--- a/gcc/config/riscv/riscv-vector-builtins.def
+++ b/gcc/config/riscv/riscv-vector-builtins.def
@@ -490,7 +490,7 @@ DEF_RVV_TYPE (vint64m8_t, 15, __rvv_int64m8_t, int64, VNx16DI, VNx8DI, VOID, _i6
 DEF_RVV_TYPE (vuint64m8_t, 16, __rvv_uint64m8_t, uint64, VNx16DI, VNx8DI, VOID, _u64m8,
 	      _u64, _e64m8)
 
-/* Enabled if TARGET_VECTOR_ELEN_FP_16 && 9TARGET_ZVFH or TARGET_ZVFHMIN).  */
+/* Enabled if TARGET_VECTOR_ELEN_FP_16 && (TARGET_ZVFH or TARGET_ZVFHMIN).  */
 /* LMUL = 1/4.  */
 DEF_RVV_TYPE (vfloat16mf4_t, 18, __rvv_float16mf4_t, float16, VNx2HF, VNx1HF, VOID,
 	      _f16mf4, _f16, _e16mf4)
diff --git a/gcc/config/riscv/vector-iterators.md b/gcc/config/riscv/vector-iterators.md
index 5fbaef89566..90743ed76c5 100644
--- a/gcc/config/riscv/vector-iterators.md
+++ b/gcc/config/riscv/vector-iterators.md
@@ -481,6 +481,13 @@
 ])
 
 (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")
+
   (VNx1DF "TARGET_VECTOR_ELEN_FP_64 && TARGET_MIN_VLEN < 128")
   (VNx2DF "TARGET_VECTOR_ELEN_FP_64")
   (VNx4DF "TARGET_VECTOR_ELEN_FP_64")
@@ -1145,6 +1152,8 @@
   (VNx16SI "VNx16HI") (VNx32SI "VNx32HI")
   (VNx1DI "VNx1SI") (VNx2DI "VNx2SI") (VNx4DI "VNx4SI") (VNx8DI "VNx8SI")
   (VNx16DI "VNx16SI")
+
+  (VNx1SF "VNx1HF") (VNx2SF "VNx2HF") (VNx4SF "VNx4HF") (VNx8SF "VNx8HF") (VNx16SF "VNx16HF") (VNx32SF "VNx32HF")
   (VNx1DF "VNx1SF") (VNx2DF "VNx2SF") (VNx4DF "VNx4SF") (VNx8DF "VNx8SF")
   (VNx16DF "VNx16SF")
 ])
@@ -1169,6 +1178,7 @@
   (VNx16SI "vnx16hi") (VNx32SI "vnx32hi")
   (VNx1DI "vnx1si") (VNx2DI "vnx2si") (VNx4DI "vnx4si") (VNx8DI "vnx8si")
   (VNx16DI "vnx16si")
+  (VNx1SF "vnx1hf") (VNx2SF "vnx2hf") (VNx4SF "vnx4hf") (VNx8SF "vnx8hf") (VNx16SF "vnx16hf") (VNx32SF "vnx32hf")
   (VNx1DF "vnx1sf") (VNx2DF "vnx2sf") (VNx4DF "vnx4sf") (VNx8DF "vnx8sf")
   (VNx16DF "vnx16sf")
 ])
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/zvfhmin-intrinsic.c b/gcc/testsuite/gcc.target/riscv/rvv/base/zvfhmin-intrinsic.c
new file mode 100644
index 00000000000..0923b6bc4d2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/zvfhmin-intrinsic.c
@@ -0,0 +1,53 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv_zvfhmin -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);
+}
+
+vfloat16mf2_t test_vfncvt_f_f_w_f16mf2(vfloat32m1_t src, size_t vl) {
+  return __riscv_vfncvt_f_f_w_f16mf2(src, vl);
+}
+
+vfloat16m1_t test_vfncvt_f_f_w_f16m1(vfloat32m2_t src, size_t vl) {
+  return __riscv_vfncvt_f_f_w_f16m1(src, vl);
+}
+
+vfloat16m2_t test_vfncvt_f_f_w_f16m2(vfloat32m4_t src, size_t vl) {
+  return __riscv_vfncvt_f_f_w_f16m2(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);
+}
+
+vfloat32m1_t test_vfwcvt_f_f_v_f32m1(vfloat16mf2_t src, size_t vl) {
+  return __riscv_vfwcvt_f_f_v_f32m1(src, vl);
+}
+
+vfloat32m2_t test_vfwcvt_f_f_v_f32m2(vfloat16m1_t src, size_t vl) {
+  return __riscv_vfwcvt_f_f_v_f32m2(src, vl);
+}
+
+vfloat32m4_t test_vfwcvt_f_f_v_f32m4(vfloat16m2_t src, size_t vl) {
+  return __riscv_vfwcvt_f_f_v_f32m4(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*mf2,\s*t[au],\s*m[au]} 2 } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+zero,\s*[a-x0-9]+,\s*e16,\s*m1,\s*t[au],\s*m[au]} 2 } } */
+/* { dg-final { scan-assembler-times {vsetvli\s+zero,\s*[a-x0-9]+,\s*e16,\s*m2,\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]+} 5 } } */
+/* { dg-final { scan-assembler-times {vfncvt\.f\.f\.w\s+v[0-9]+,\s*v[0-9]+} 5 } } */
+