riscv: Use sqrt{f} builtin

Checked with a build for riscv64-linux-gnu-rv64imac-lp64 (no
builtin support), riscv64-linux-gnu-rv64imafdc-lp64, and
riscv64-linux-gnu-rv64imafdc-lp64d.

diff --git a/sysdeps/riscv/rvd/e_sqrt.c b/sysdeps/riscv/rvd/e_sqrt.c
deleted file mode 100644 (file)
index 7defcb5..0000000
--- a/sysdeps/riscv/rvd/e_sqrt.c
+++ /dev/null
@@ -1,28 +0,0 @@
-/* Double precision floating point square root.  RISC-V version.
-   Copyright (C) 2017-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <math.h>
-#include <libm-alias-finite.h>
-
-double
-__ieee754_sqrt (double x)
-{
-  asm ("fsqrt.d %0, %1" : "=f" (x) : "f" (x));
-  return x;
-}
-libm_alias_finite (__ieee754_sqrt, __sqrt)

diff --git a/sysdeps/riscv/rvd/math-use-builtins-sqrt.h b/sysdeps/riscv/rvd/math-use-builtins-sqrt.h
new file mode 100644 (file)
index 0000000..e94c915
--- /dev/null
+++ b/sysdeps/riscv/rvd/math-use-builtins-sqrt.h
@@ -0,0 +1,4 @@
+#define USE_SQRT_BUILTIN 1
+#define USE_SQRTF_BUILTIN 1
+#define USE_SQRTL_BUILTIN 0
+#define USE_SQRTF128_BUILTIN 0

diff --git a/sysdeps/riscv/rvf/e_sqrtf.c b/sysdeps/riscv/rvf/e_sqrtf.c
deleted file mode 100644 (file)
index 04835e3..0000000
--- a/sysdeps/riscv/rvf/e_sqrtf.c
+++ /dev/null
@@ -1,28 +0,0 @@
-/* Single precision floating point square root.  RISC-V version.
-   Copyright (C) 2017-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <math.h>
-#include <libm-alias-finite.h>
-
-float
-__ieee754_sqrtf (float x)
-{
-  asm ("fsqrt.s %0, %1" : "=f" (x) : "f" (x));
-  return x;
-}
-libm_alias_finite (__ieee754_sqrtf, __sqrtf)