[gcc(refs/vendors/riscv/heads/gcc-13-with-riscv-opts)] RISC-V: Support RVV VFMADD rounding mode intrinsic API

[gcc(refs/vendors/riscv/heads/gcc-13-with-riscv-opts)] RISC-V: Support RVV VFMADD rounding mode intrinsic API

[Jeff Law]

https://gcc.gnu.org/g:57d534304c1b889d61340ec5339b98ae902c5d24

commit 57d534304c1b889d61340ec5339b98ae902c5d24
Author: Pan Li <pan2.li@intel.com>
Date:   Fri Aug 11 15:15:47 2023 +0800

    RISC-V: Support RVV VFMADD rounding mode intrinsic API
    
    This patch would like to support the rounding mode API for the
    VFMADD as the below samples.
    
    * __riscv_vfmadd_vv_f32m1_rm
    * __riscv_vfmadd_vv_f32m1_rm_m
    * __riscv_vfmadd_vf_f32m1_rm
    * __riscv_vfmadd_vf_f32m1_rm_m
    
    Signed-off-by: Pan Li <pan2.li@intel.com>
    
    gcc/ChangeLog:
    
            * config/riscv/riscv-vector-builtins-bases.cc
            (class vfmadd_frm): New class for vfmadd frm.
            (vfmadd_frm_obj): New declaration.
            (BASE): Ditto.
            * config/riscv/riscv-vector-builtins-bases.h: Ditto.
            * config/riscv/riscv-vector-builtins-functions.def
            (vfmadd_frm): New function definition.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/riscv/rvv/base/float-point-madd.c: New test.
    
    (cherry picked from commit 797334e931362174eb8ad15ded79cdf8e846e744)

Diff:
---
 gcc/config/riscv/riscv-vector-builtins-bases.cc    | 25 ++++++++++++
 gcc/config/riscv/riscv-vector-builtins-bases.h     |  1 +
 .../riscv/riscv-vector-builtins-functions.def      |  2 +
 .../gcc.target/riscv/rvv/base/float-point-madd.c   | 47 ++++++++++++++++++++++
 4 files changed, 75 insertions(+)

diff --git a/gcc/config/riscv/riscv-vector-builtins-bases.cc b/gcc/config/riscv/riscv-vector-builtins-bases.cc
index 60c6e16f6aed..7476cdc317d7 100644
--- a/gcc/config/riscv/riscv-vector-builtins-bases.cc
+++ b/gcc/config/riscv/riscv-vector-builtins-bases.cc
@@ -447,6 +447,29 @@ public:
   }
 };
 
+/* Implements below instructions for frm
+   - vfmadd
+*/
+class vfmadd_frm : public function_base
+{
+public:
+  bool has_rounding_mode_operand_p () const override { return true; }
+
+  bool has_merge_operand_p () const override { return false; }
+
+  rtx expand (function_expander &e) const override
+  {
+    if (e.op_info->op == OP_TYPE_vf)
+      return e.use_ternop_insn (
+	false, code_for_pred_mul_scalar (PLUS, e.vector_mode ()));
+    if (e.op_info->op == OP_TYPE_vv)
+      return e.use_ternop_insn (
+	false, code_for_pred_mul (PLUS, e.vector_mode ()));
+
+    gcc_unreachable ();
+  }
+};
+
 /* Implements vrsub.  */
 class vrsub : public function_base
 {
@@ -2211,6 +2234,7 @@ static CONSTEXPR const vfmacc_frm vfmacc_frm_obj;
 static CONSTEXPR const vfnmsac vfnmsac_obj;
 static CONSTEXPR const vfnmsac_frm vfnmsac_frm_obj;
 static CONSTEXPR const vfmadd vfmadd_obj;
+static CONSTEXPR const vfmadd_frm vfmadd_frm_obj;
 static CONSTEXPR const vfnmsub vfnmsub_obj;
 static CONSTEXPR const vfnmacc vfnmacc_obj;
 static CONSTEXPR const vfnmacc_frm vfnmacc_frm_obj;
@@ -2450,6 +2474,7 @@ BASE (vfmacc_frm)
 BASE (vfnmsac)
 BASE (vfnmsac_frm)
 BASE (vfmadd)
+BASE (vfmadd_frm)
 BASE (vfnmsub)
 BASE (vfnmacc)
 BASE (vfnmacc_frm)
diff --git a/gcc/config/riscv/riscv-vector-builtins-bases.h b/gcc/config/riscv/riscv-vector-builtins-bases.h
index 28eec2c3e997..5850ff0cf2e7 100644
--- a/gcc/config/riscv/riscv-vector-builtins-bases.h
+++ b/gcc/config/riscv/riscv-vector-builtins-bases.h
@@ -164,6 +164,7 @@ extern const function_base *const vfmacc_frm;
 extern const function_base *const vfnmsac;
 extern const function_base *const vfnmsac_frm;
 extern const function_base *const vfmadd;
+extern const function_base *const vfmadd_frm;
 extern const function_base *const vfnmsub;
 extern const function_base *const vfnmacc;
 extern const function_base *const vfnmacc_frm;
diff --git a/gcc/config/riscv/riscv-vector-builtins-functions.def b/gcc/config/riscv/riscv-vector-builtins-functions.def
index c84e052c1a91..04f3de1275ce 100644
--- a/gcc/config/riscv/riscv-vector-builtins-functions.def
+++ b/gcc/config/riscv/riscv-vector-builtins-functions.def
@@ -357,6 +357,8 @@ DEF_RVV_FUNCTION (vfmsac_frm, alu_frm, full_preds, f_vvvv_ops)
 DEF_RVV_FUNCTION (vfmsac_frm, alu_frm, full_preds, f_vvfv_ops)
 DEF_RVV_FUNCTION (vfnmsac_frm, alu_frm, full_preds, f_vvvv_ops)
 DEF_RVV_FUNCTION (vfnmsac_frm, alu_frm, full_preds, f_vvfv_ops)
+DEF_RVV_FUNCTION (vfmadd_frm, alu_frm, full_preds, f_vvvv_ops)
+DEF_RVV_FUNCTION (vfmadd_frm, alu_frm, full_preds, f_vvfv_ops)
 
 // 13.7. Vector Widening Floating-Point Fused Multiply-Add Instructions
 DEF_RVV_FUNCTION (vfwmacc, alu, full_preds, f_wwvv_ops)
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/float-point-madd.c b/gcc/testsuite/gcc.target/riscv/rvv/base/float-point-madd.c
new file mode 100644
index 000000000000..00c9d0029987
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/float-point-madd.c
@@ -0,0 +1,47 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64 -O3 -Wno-psabi" } */
+
+#include "riscv_vector.h"
+
+typedef float float32_t;
+
+vfloat32m1_t
+test_riscv_vfmadd_vv_f32m1_rm (vfloat32m1_t vd, vfloat32m1_t op1,
+			       vfloat32m1_t op2, size_t vl) {
+  return __riscv_vfmadd_vv_f32m1_rm (vd, op1, op2, 0, vl);
+}
+
+vfloat32m1_t
+test_vfmadd_vv_f32m1_rm_m (vbool32_t mask, vfloat32m1_t vd, vfloat32m1_t op1,
+			   vfloat32m1_t op2, size_t vl) {
+  return __riscv_vfmadd_vv_f32m1_rm_m (mask, vd, op1, op2, 1, vl);
+}
+
+vfloat32m1_t
+test_vfmadd_vf_f32m1_rm (vfloat32m1_t vd, float32_t op1, vfloat32m1_t op2,
+			 size_t vl) {
+  return __riscv_vfmadd_vf_f32m1_rm (vd, op1, op2, 2, vl);
+}
+
+vfloat32m1_t
+test_vfmadd_vf_f32m1_rm_m (vfloat32m1_t vd, vbool32_t mask, float32_t op1,
+			   vfloat32m1_t op2, size_t vl) {
+  return __riscv_vfmadd_vf_f32m1_rm_m (mask, vd, op1, op2, 3, vl);
+}
+
+vfloat32m1_t
+test_riscv_vfmadd_vv_f32m1 (vfloat32m1_t vd, vfloat32m1_t op1,
+			    vfloat32m1_t op2, size_t vl) {
+  return __riscv_vfmadd_vv_f32m1 (vd, op1, op2, vl);
+}
+
+vfloat32m1_t
+test_vfmadd_vv_f32m1_m (vbool32_t mask, vfloat32m1_t vd, vfloat32m1_t op1,
+			vfloat32m1_t op2, size_t vl) {
+  return __riscv_vfmadd_vv_f32m1_m (mask, vd, op1, op2, vl);
+}
+
+/* { dg-final { scan-assembler-times {vfmadd\.v[vf]\s+v[0-9]+,\s*[fav]+[0-9]+,\s*v[0-9]+} 6 } } */
+/* { dg-final { scan-assembler-times {frrm\s+[axs][0-9]+} 4 } } */
+/* { dg-final { scan-assembler-times {fsrm\s+[axs][0-9]+} 4 } } */
+/* { dg-final { scan-assembler-times {fsrmi\s+[01234]} 4 } } */