old mode 100644
new mode 100755
@@ -80,3 +80,7 @@ if test "$libc_cv_static_pie_on_riscv" = yes; then
printf "%s\n" "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
fi
+
+if test x"$build_mathvec" = no; then
+ build_mathvec=yes
+fi
@@ -43,3 +43,7 @@ EOF
if test "$libc_cv_static_pie_on_riscv" = yes; then
AC_DEFINE(SUPPORT_STATIC_PIE)
fi
+
+if test x"$build_mathvec" = no; then
+ build_mathvec=yes
+fi
new file mode 100644
@@ -0,0 +1,5 @@
+libmvec-supported-funcs = cos
+
+ifeq ($(subdir),mathvec)
+libmvec-support = $(addprefix d,$(libmvec-supported-funcs))
+endif
new file mode 100644
@@ -0,0 +1,5 @@
+libmvec {
+ GLIBC_2.39 {
+ _ZGVnN2v_cos;
+ }
+}
\ No newline at end of file
new file mode 100644
@@ -0,0 +1,29 @@
+/* Platform-specific SIMD declarations of math functions.
+
+ Copyright (C) 2024 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/>. */
+
+#ifndef _MATH_H
+# error "Never include <bits/math-vector.h> directly;\
+ include <math.h> instead."
+#endif
+
+#if defined __riscv__
+# define __DECL_RVV_RISCV _Pragma
+# undef __DECL_RVV_cos
+# define __DECL_RVV_cos __DECL_RVV_RISCV
+#endif
new file mode 100644
@@ -0,0 +1,94 @@
+/* Double-precision vector cos function.
+
+ Copyright (C) 2024 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 "v_math.h"
+
+
+static const struct data
+{
+ vfloat64m2_t poly[7];
+ vfloat64m2_t range_val, shift, inv_pi, half_pi, pi_1, pi_2, pi_3;
+} data = {
+ /* Worst-case error is 3.3 ulp in [-pi/2, pi/2]. */
+ .poly = { V2 (-0x1.555555555547bp-3), V2 (0x1.1111111108a4dp-7),
+ V2 (-0x1.a01a019936f27p-13), V2 (0x1.71de37a97d93ep-19),
+ V2 (-0x1.ae633919987c6p-26), V2 (0x1.60e277ae07cecp-33),
+ V2 (-0x1.9e9540300a1p-41) },
+ .inv_pi = V2 (0x1.45f306dc9c883p-2),
+ .half_pi = V2 (0x1.921fb54442d18p+0),
+ .pi_1 = V2 (0x1.921fb54442d18p+1),
+ .pi_2 = V2 (0x1.1a62633145c06p-53),
+ .pi_3 = V2 (0x1.c1cd129024e09p-106),
+ .shift = V2 (0x1.8p52),
+ .range_val = V2 (0x1p23)
+};
+
+#define C(i) d->poly[i]
+
+static vfloat64m2_t NOINLINE
+special_case (vfloat64m2_t x, vfloat64m2_t y, vuint64m2_t odd, vuint64m2_t cmp)
+{
+ y = vreinterpret_v_u64m2_f64m2 (vor (vreinterpret_v_f64m2_u64m2 (y), odd, 1));
+ return v_call_f64 (cos, x, y, cmp);
+}
+
+vfloat64m2_t V_NAME_D1 (cos) (vfloat64m2_t x)
+{
+ const struct data *d = ptr_barrier (&data);
+ vfloat64m2_t n, r, r2, r3, r4, t1, t2, t3, y;
+ vuint64m2_t odd, cmp;
+
+ r = vfabs_v_f64m2 (x, 2);
+ cmp = (vuint64m2_t) vmsgeu (vreinterpret_v_f64m2_u64m2 (r),
+ vreinterpret_v_f64m2_u64m2 (d->range_val));
+ if (__glibc_unlikely (v_any_u64 (cmp)))
+ /* If fenv exceptions are to be triggered correctly, set any special lanes
+ to 1 (which is neutral w.r.t. fenv). These lanes will be fixed by
+ special-case handler later. */
+ r = vmsltu (cmp, v_f64 (1.0), r);
+
+ /* n = rint((|x|+pi/2)/pi) - 0.5. */
+ n = vfmadd (d->shift, d->inv_pi, vfadd (r, d->half_pi,2), 2);
+ odd = vshlq_n_u64 (vreinterpret_v_f64m2_u64m2 (n), 63);
+ n = vfsub (n, d->shift, 2);
+ n = vfsub (n, v_f64 (0.5), 2);
+
+ /* r = |x| - n*pi (range reduction into -pi/2 .. pi/2). */
+ r = vfmsub (r, d->pi_1, n, 2);
+ r = vfmsub (r, d->pi_2, n, 2);
+ r = vfmsub (r, d->pi_3, n, 2);
+
+ /* sin(r) poly approx. */
+ r2 = vfmul (r, r, 2);
+ r3 = vfmul (r2, r, 2);
+ r4 = vfmul (r2, r2, 2);
+
+ t1 = vfmadd (C (4), C (5), r2, 2);
+ t2 = vfmadd (C (2), C (3), r2, 2);
+ t3 = vfmadd (C (0), C (1), r2, 2);
+
+ y = vfmadd (t1, C (6), r4, 2);
+ y = vfmadd (t2, y, r4, 2);
+ y = vfmadd (t3, y, r4, 2);
+ y = vfmadd (r, y, r3, 2);
+
+ if (__glibc_unlikely (v_any_u64 (cmp)))
+ return special_case (x, y, odd, cmp);
+ return vreinterpretq_f64_u64 (vor (vreinterpret_v_f64m2_u64m2 (y), odd, 2));
+}
new file mode 100644
@@ -0,0 +1,42 @@
+/* Configure optimized libm functions. RISC-V version.
+ Copyright (C) 2024 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/>. */
+
+#ifndef RISCV_MATH_PRIVATE_H
+#define RISCV_MATH_PRIVATE_H 1
+
+#include <stdint.h>
+#include <math.h>
+
+/* Use inline round and lround instructions. */
+#define TOINT_INTRINSICS 1
+
+static inline double_t
+roundtoint (double_t x)
+{
+ return round (x);
+}
+
+static inline int32_t
+converttoint (double_t x)
+{
+ return lround (x);
+}
+
+#include_next <math_private.h>
+
+#endif
new file mode 100644
@@ -0,0 +1,139 @@
+/* Utilities for Advanced SIMD libmvec routines.
+ Copyright (C) 2024 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/>. */
+
+#ifndef _V_MATH_H
+#define _V_MATH_H
+
+#include <riscv_vector.h>
+#include "vecmath_config.h"
+
+#define V_NAME_D1(fun) _ZGVnN2v_##fun
+
+/* Shorthand helpers for declaring constants. */
+#define V2(X) { X, X }
+#define V4(X) { X, X, X, X }
+#define V8(X) { X, X, X, X, X, X, X, X }
+
+static inline vfloat32m4_t
+v_f32 (float x)
+{
+ return (vfloat32m4_t) V4 (x);
+}
+static inline vuint32m4_t
+v_u32 (uint32_t x)
+{
+ return (vuint32m4_t) V4 (x);
+}
+static inline vint32m4_t
+v_s32 (int32_t x)
+{
+ return (vint32m4_t) V4 (x);
+}
+
+/* true if any elements of a vector compare result is non-zero. */
+static inline int
+v_any_u32 (vuint32m4_t x)
+{
+ /* assume elements in x are either 0 or -1u. */
+ return vpaddd_u64 (vreinterpret_v_u64m2_u32m2 (x)) != 0;
+}
+static inline int
+v_any_u32h (vuint32m2_t x)
+{
+ return vget_lane_u64 (vreinterpret_v_u32m2_u64m2 (x), 0) != 0;
+}
+static inline vfloat32m4_t
+v_lookup_f32 (const float *tab, vuint32m4_t idx)
+{
+ return (vfloat32m4_t){ tab[idx[0]], tab[idx[1]], tab[idx[2]], tab[idx[3]] };
+}
+static inline vuint32m4_t
+v_lookup_u32 (const uint32_t *tab, vuint32m4_t idx)
+{
+ return (vuint32m4_t){ tab[idx[0]], tab[idx[1]], tab[idx[2]], tab[idx[3]] };
+}
+static inline vfloat32m4_t
+v_call_f32 (float (*f) (float), vfloat32m4_t x, vfloat32m4_t y, vuint32m4_t p)
+{
+ return (vfloat32m4_t){ p[0] ? f (x[0]) : y[0], p[1] ? f (x[1]) : y[1],
+ p[2] ? f (x[2]) : y[2], p[3] ? f (x[3]) : y[3] };
+}
+static inline vfloat32m4_t
+v_call2_f32 (float (*f) (float, float), vfloat32m4_t x1, vfloat32m4_t x2,
+ vfloat32m4_t y, vuint32m4_t p)
+{
+ return (vfloat32m4_t){ p[0] ? f (x1[0], x2[0]) : y[0],
+ p[1] ? f (x1[1], x2[1]) : y[1],
+ p[2] ? f (x1[2], x2[2]) : y[2],
+ p[3] ? f (x1[3], x2[3]) : y[3] };
+}
+
+static inline vfloat64m2_t
+v_f64 (double x)
+{
+ return (vfloat64m2_t) V2 (x);
+}
+static inline vuint64m2_t
+v_u64 (uint64_t x)
+{
+ return (vuint64m2_t) V2 (x);
+}
+static inline vint64m2_t
+v_s64 (int64_t x)
+{
+ return (vint64m2_t) V2 (x);
+}
+
+/* true if any elements of a vector compare result is non-zero. */
+static inline int
+v_any_u64 (vuint64m1_t x)
+{
+ /* assume elements in x are either 0 or -1u. */
+ return vpaddd_u64 (x) != 0;
+}
+/* true if all elements of a vector compare result is 1. */
+static inline int
+v_all_u64 (vuint64m1_t x)
+{
+ /* assume elements in x are either 0 or -1u. */
+ return vpaddd_s64 (vreinterpretq_s64_u64 (x)) == -2;
+}
+static inline vfloat64m1_t
+v_lookup_f64 (const double *tab, vuint64m1_t idx)
+{
+ return (vfloat64m1_t){ tab[idx[0]], tab[idx[1]] };
+}
+static inline vuint64m1_t
+v_lookup_u64 (const uint64_t *tab, vuint64m1_t idx)
+{
+ return (vuint64m1_t){ tab[idx[0]], tab[idx[1]] };
+}
+static inline vfloat64m1_t
+v_call_f64 (double (*f) (double), vfloat64m1_t x, vfloat64m1_t y, vuint64m1_t p)
+{
+ return (vfloat64m1_t){ p[0] ? f (x[0]) : y[0], p[1] ? f (x[1]) : y[1] };
+}
+static inline vfloat64m1_t
+v_call2_f64 (double (*f) (double, double), vfloat64m1_t x1, vfloat64m1_t x2,
+ vfloat64m1_t y, vuint64m1_t p)
+{
+ return (vfloat64m1_t){ p[0] ? f (x1[0], x2[0]) : y[0],
+ p[1] ? f (x1[1], x2[1]) : y[1] };
+}
+
+#endif
new file mode 100644
@@ -0,0 +1,33 @@
+/* Configuration for libmvec routines.
+ Copyright (C) 2023 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/>. */
+
+#ifndef _VECMATH_CONFIG_H
+#define _VECMATH_CONFIG_H
+
+#include <math_private.h>
+
+/* Return ptr but hide its value from the compiler so accesses through it
+ cannot be optimized based on the contents. */
+#define ptr_barrier(ptr) \
+ ({ \
+ __typeof (ptr) __ptr = (ptr); \
+ __asm("" : "+r"(__ptr)); \
+ __ptr; \
+ })
+
+#endif
new file mode 100644
@@ -0,0 +1 @@
+GLIBC_2.39 _ZGVnN2v_cos F
\ No newline at end of file
From: yulong <shiyulong@iscas.ac.cn> This patch tries to enable libmvec on RISC-V. I also have demonstrated how this all fits together by adding implementations for vector cos. This patch is a try and we hope to receive valuable comments. Thanks, yulong --- sysdeps/riscv/configure | 4 + sysdeps/riscv/configure.ac | 4 + sysdeps/riscv/rvd/Makefile | 5 + sysdeps/riscv/rvd/Versions | 5 + sysdeps/riscv/rvd/bits/math-vector.h | 29 ++++ sysdeps/riscv/rvd/cos.c | 94 ++++++++++++ sysdeps/riscv/rvd/math_private.h | 42 ++++++ sysdeps/riscv/rvd/v_math.h | 139 ++++++++++++++++++ sysdeps/riscv/rvd/vecmath_config.h | 33 +++++ sysdeps/unix/sysv/linux/riscv/libmvec.abilist | 1 + 10 files changed, 356 insertions(+) mode change 100644 => 100755 sysdeps/riscv/configure create mode 100644 sysdeps/riscv/rvd/Makefile create mode 100644 sysdeps/riscv/rvd/Versions create mode 100644 sysdeps/riscv/rvd/bits/math-vector.h create mode 100644 sysdeps/riscv/rvd/cos.c create mode 100644 sysdeps/riscv/rvd/math_private.h create mode 100644 sysdeps/riscv/rvd/v_math.h create mode 100644 sysdeps/riscv/rvd/vecmath_config.h create mode 100644 sysdeps/unix/sysv/linux/riscv/libmvec.abilist