[v1] RISC-V: Support RVV VFSUB and VFRSUB rounding mode intrinsic API

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

This patch would like to support the rounding mode API for both the
VFSUB and VFRSUB as below samples.

* __riscv_vfsub_vv_f32m1_rm
* __riscv_vfsub_vv_f32m1_rm_m
* __riscv_vfsub_vf_f32m1_rm
* __riscv_vfsub_vf_f32m1_rm_m
* __riscv_vfrsub_vf_f32m1_rm
* __riscv_vfrsub_vf_f32m1_rm_m

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

gcc/ChangeLog:

	* config/riscv/riscv-vector-builtins-bases.cc
	(class reverse_binop_frm): Add new template for reversed frm.
	(vfsub_frm_obj): New obj.
	(vfrsub_frm_obj): Likewise.
	* config/riscv/riscv-vector-builtins-bases.h:
	(vfsub_frm): New declaration.
	(vfrsub_frm): Likewise.
	* config/riscv/riscv-vector-builtins-functions.def
	(vfsub_frm): New function define.
	(vfrsub_frm): Likewise.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/base/float-point-single-rsub.c: New test.
	* gcc.target/riscv/rvv/base/float-point-single-sub.c: New test.
---
 .../riscv/riscv-vector-builtins-bases.cc      | 21 +++++++++++++
 .../riscv/riscv-vector-builtins-bases.h       |  2 ++
 .../riscv/riscv-vector-builtins-functions.def |  3 ++
 .../riscv/rvv/base/float-point-single-rsub.c  | 19 ++++++++++++
 .../riscv/rvv/base/float-point-single-sub.c   | 30 +++++++++++++++++++
 5 files changed, 75 insertions(+)
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-rsub.c
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-sub.c
  

LGTM



juzhe.zhong@rivai.ai
 
From: pan2.li
Date: 2023-08-01 14:48
To: gcc-patches
CC: juzhe.zhong; pan2.li; yanzhang.wang; kito.cheng
Subject: [PATCH v1] RISC-V: Support RVV VFSUB and VFRSUB rounding mode intrinsic API
From: Pan Li <pan2.li@intel.com>
 
This patch would like to support the rounding mode API for both the
VFSUB and VFRSUB as below samples.
 
* __riscv_vfsub_vv_f32m1_rm
* __riscv_vfsub_vv_f32m1_rm_m
* __riscv_vfsub_vf_f32m1_rm
* __riscv_vfsub_vf_f32m1_rm_m
* __riscv_vfrsub_vf_f32m1_rm
* __riscv_vfrsub_vf_f32m1_rm_m
 
Signed-off-by: Pan Li <pan2.li@intel.com>
 
gcc/ChangeLog:
 
* config/riscv/riscv-vector-builtins-bases.cc
(class reverse_binop_frm): Add new template for reversed frm.
(vfsub_frm_obj): New obj.
(vfrsub_frm_obj): Likewise.
* config/riscv/riscv-vector-builtins-bases.h:
(vfsub_frm): New declaration.
(vfrsub_frm): Likewise.
* config/riscv/riscv-vector-builtins-functions.def
(vfsub_frm): New function define.
(vfrsub_frm): Likewise.
 
gcc/testsuite/ChangeLog:
 
* gcc.target/riscv/rvv/base/float-point-single-rsub.c: New test.
* gcc.target/riscv/rvv/base/float-point-single-sub.c: New test.
---
.../riscv/riscv-vector-builtins-bases.cc      | 21 +++++++++++++
.../riscv/riscv-vector-builtins-bases.h       |  2 ++
.../riscv/riscv-vector-builtins-functions.def |  3 ++
.../riscv/rvv/base/float-point-single-rsub.c  | 19 ++++++++++++
.../riscv/rvv/base/float-point-single-sub.c   | 30 +++++++++++++++++++
5 files changed, 75 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-rsub.c
create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-sub.c
 
diff --git a/gcc/config/riscv/riscv-vector-builtins-bases.cc b/gcc/config/riscv/riscv-vector-builtins-bases.cc
index 316b35b57c8..035cafc43b3 100644
--- a/gcc/config/riscv/riscv-vector-builtins-bases.cc
+++ b/gcc/config/riscv/riscv-vector-builtins-bases.cc
@@ -298,6 +298,23 @@ public:
   }
};
+/* Implements below instructions for frm
+   - vfrsub
+*/
+template<rtx_code CODE>
+class reverse_binop_frm : public function_base
+{
+public:
+  bool has_rounding_mode_operand_p () const override { return true; }
+
+public:
+  rtx expand (function_expander &e) const override
+  {
+    return e.use_exact_insn (
+      code_for_pred_reverse_scalar (CODE, e.vector_mode ()));
+  }
+};
+
/* Implements vrsub.  */
class vrsub : public function_base
{
@@ -2042,7 +2059,9 @@ static CONSTEXPR const vid vid_obj;
static CONSTEXPR const binop<PLUS> vfadd_obj;
static CONSTEXPR const binop<MINUS> vfsub_obj;
static CONSTEXPR const binop_frm<PLUS> vfadd_frm_obj;
+static CONSTEXPR const binop_frm<MINUS> vfsub_frm_obj;
static CONSTEXPR const reverse_binop<MINUS> vfrsub_obj;
+static CONSTEXPR const reverse_binop_frm<MINUS> vfrsub_frm_obj;
static CONSTEXPR const widen_binop<PLUS> vfwadd_obj;
static CONSTEXPR const widen_binop<MINUS> vfwsub_obj;
static CONSTEXPR const binop<MULT> vfmul_obj;
@@ -2269,7 +2288,9 @@ BASE (vid)
BASE (vfadd)
BASE (vfadd_frm)
BASE (vfsub)
+BASE (vfsub_frm)
BASE (vfrsub)
+BASE (vfrsub_frm)
BASE (vfwadd)
BASE (vfwsub)
BASE (vfmul)
diff --git a/gcc/config/riscv/riscv-vector-builtins-bases.h b/gcc/config/riscv/riscv-vector-builtins-bases.h
index e771a36adc8..5c6b239c274 100644
--- a/gcc/config/riscv/riscv-vector-builtins-bases.h
+++ b/gcc/config/riscv/riscv-vector-builtins-bases.h
@@ -144,7 +144,9 @@ extern const function_base *const vid;
extern const function_base *const vfadd;
extern const function_base *const vfadd_frm;
extern const function_base *const vfsub;
+extern const function_base *const vfsub_frm;
extern const function_base *const vfrsub;
+extern const function_base *const vfrsub_frm;
extern const function_base *const vfwadd;
extern const function_base *const vfwsub;
extern const function_base *const vfmul;
diff --git a/gcc/config/riscv/riscv-vector-builtins-functions.def b/gcc/config/riscv/riscv-vector-builtins-functions.def
index 035c9e4252f..fa1c2cef970 100644
--- a/gcc/config/riscv/riscv-vector-builtins-functions.def
+++ b/gcc/config/riscv/riscv-vector-builtins-functions.def
@@ -291,6 +291,9 @@ DEF_RVV_FUNCTION (vfsub, alu, full_preds, f_vvf_ops)
DEF_RVV_FUNCTION (vfrsub, alu, full_preds, f_vvf_ops)
DEF_RVV_FUNCTION (vfadd_frm, alu_frm, full_preds, f_vvv_ops)
DEF_RVV_FUNCTION (vfadd_frm, alu_frm, full_preds, f_vvf_ops)
+DEF_RVV_FUNCTION (vfsub_frm, alu_frm, full_preds, f_vvv_ops)
+DEF_RVV_FUNCTION (vfsub_frm, alu_frm, full_preds, f_vvf_ops)
+DEF_RVV_FUNCTION (vfrsub_frm, alu_frm, full_preds, f_vvf_ops)
// 13.3. Vector Widening Floating-Point Add/Subtract Instructions
DEF_RVV_FUNCTION (vfwadd, widen_alu, full_preds, f_wvv_ops)
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-rsub.c b/gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-rsub.c
new file mode 100644
index 00000000000..1d770adc32c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-rsub.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64 -O3 -Wno-psabi" } */
+
+#include "riscv_vector.h"
+
+typedef float float32_t;
+
+vfloat32m1_t
+test_vfrsub_vf_f32m1_rm (vfloat32m1_t op1, float32_t op2, size_t vl) {
+  return __riscv_vfrsub_vf_f32m1_rm (op1, op2, 2, vl);
+}
+
+vfloat32m1_t
+test_vfrsub_vf_f32m1_rm_m (vbool32_t mask, vfloat32m1_t op1, float32_t op2,
+    size_t vl) {
+  return __riscv_vfrsub_vf_f32m1_rm_m (mask, op1, op2, 3, vl);
+}
+
+/* { dg-final { scan-assembler-times {vfrsub\.v[vf]\s+v[0-9]+,\s*v[0-9]+,\s*[fav]+[0-9]+} 2 } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-sub.c b/gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-sub.c
new file mode 100644
index 00000000000..34ed03a31d9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/float-point-single-sub.c
@@ -0,0 +1,30 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64 -O3 -Wno-psabi" } */
+
+#include "riscv_vector.h"
+
+typedef float float32_t;
+
+vfloat32m1_t
+test_riscv_vfsub_vv_f32m1_rm (vfloat32m1_t op1, vfloat32m1_t op2, size_t vl) {
+  return __riscv_vfsub_vv_f32m1_rm (op1, op2, 0, vl);
+}
+
+vfloat32m1_t
+test_vfsub_vv_f32m1_rm_m (vbool32_t mask, vfloat32m1_t op1, vfloat32m1_t op2,
+ size_t vl) {
+  return __riscv_vfsub_vv_f32m1_rm_m (mask, op1, op2, 1, vl);
+}
+
+vfloat32m1_t
+test_vfsub_vf_f32m1_rm (vfloat32m1_t op1, float32_t op2, size_t vl) {
+  return __riscv_vfsub_vf_f32m1_rm (op1, op2, 2, vl);
+}
+
+vfloat32m1_t
+test_vfsub_vf_f32m1_rm_m (vbool32_t mask, vfloat32m1_t op1, float32_t op2,
+   size_t vl) {
+  return __riscv_vfsub_vf_f32m1_rm_m (mask, op1, op2, 3, vl);
+}
+
+/* { dg-final { scan-assembler-times {vfsub\.v[vf]\s+v[0-9]+,\s*v[0-9]+,\s*[fav]+[0-9]+} 4 } } */
-- 
2.34.1
  

Committed, thanks Juzhe.

Pan

From: juzhe.zhong@rivai.ai <juzhe.zhong@rivai.ai>
Sent: Tuesday, August 1, 2023 3:22 PM
To: Li, Pan2 <pan2.li@intel.com>; gcc-patches <gcc-patches@gcc.gnu.org>
Cc: Li, Pan2 <pan2.li@intel.com>; Wang, Yanzhang <yanzhang.wang@intel.com>; kito.cheng <kito.cheng@gmail.com>
Subject: Re: [PATCH v1] RISC-V: Support RVV VFSUB and VFRSUB rounding mode intrinsic API

LGTM