[PATCH v4 3/4] add rvv memcpy in ifunc-impl-list

[daichengrong@iscas.ac.cn]

From: daichengrong <daichengrong@iscas.ac.cn>

---
 .../unix/sysv/linux/riscv/multiarch/ifunc-impl-list.c    | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/riscv/multiarch/ifunc-impl-list.c b/sysdeps/unix/sysv/linux/riscv/multiarch/ifunc-impl-list.c
index 1c1deca8f6..01846a7414 100644
--- a/sysdeps/unix/sysv/linux/riscv/multiarch/ifunc-impl-list.c
+++ b/sysdeps/unix/sysv/linux/riscv/multiarch/ifunc-impl-list.c
@@ -27,6 +27,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   size_t i = max;
 
   bool fast_unaligned = false;
+  bool rvv_ext = false;
 
   struct riscv_hwprobe pair = { .key = RISCV_HWPROBE_KEY_CPUPERF_0 };
   if (__riscv_hwprobe (&pair, 1, 0, NULL, 0) == 0
@@ -34,7 +35,15 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
           == RISCV_HWPROBE_MISALIGNED_FAST)
     fast_unaligned = true;
 
+  pair.key = RISCV_HWPROBE_KEY_IMA_EXT_0;
+  pair.value = 0;
+  if (__riscv_hwprobe (&pair, 1, 0, NULL, 0) == 0
+      && (pair.value & RISCV_HWPROBE_IMA_V) == RISCV_HWPROBE_IMA_V)
+    rvv_ext = true;
+
   IFUNC_IMPL (i, name, memcpy,
+	      IFUNC_IMPL_ADD (array, i, memcpy, rvv_ext,
+			      __memcpy_vector)
 	      IFUNC_IMPL_ADD (array, i, memcpy, fast_unaligned,
 			      __memcpy_noalignment)
 	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_generic))
-- 
2.25.1