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[PATCH 06/12] RISC-V: Generic <math.h> and soft-fp Routines
- From: Palmer Dabbelt <palmer at dabbelt dot com>
- To: libc-alpha at sourceware dot org
- Cc: Andrew Waterman <andrew at sifive dot com>
- Cc: patches at groups dot riscv dot org
- Cc: Darius Rad <darius at bluespec dot com>
- Cc: Palmer Dabbelt <palmer at dabbelt dot com>
- Date: Wed, 14 Jun 2017 11:30:42 -0700
- Subject: [PATCH 06/12] RISC-V: Generic <math.h> and soft-fp Routines
- Authentication-results: sourceware.org; auth=none
- References: <20170614183048.11040-1-palmer@dabbelt.com>
This patch contains the miscellaneous math routines and headers we have
implemented for RISC-V. This includes things from <math.h> that aren't
completely ISA-generic, floating-point bit manipulation, and soft-fp
hooks.
---
sysdeps/riscv/bits/fenv.h | 65 ++++++++
sysdeps/riscv/bits/mathdef.h | 21 +++
sysdeps/riscv/bits/mathinline.h | 142 ++++++++++++++++
sysdeps/riscv/fpu_control.h | 77 +++++++++
sysdeps/riscv/ieee754.h | 325 ++++++++++++++++++++++++++++++++++++
sysdeps/riscv/soft-fp/e_sqrtl.c | 1 +
sysdeps/riscv/soft-fp/sfp-machine.h | 93 +++++++++++
7 files changed, 724 insertions(+)
create mode 100644 sysdeps/riscv/bits/fenv.h
create mode 100644 sysdeps/riscv/bits/mathdef.h
create mode 100644 sysdeps/riscv/bits/mathinline.h
create mode 100644 sysdeps/riscv/fpu_control.h
create mode 100644 sysdeps/riscv/ieee754.h
create mode 100644 sysdeps/riscv/soft-fp/e_sqrtl.c
create mode 100644 sysdeps/riscv/soft-fp/sfp-machine.h
diff --git a/sysdeps/riscv/bits/fenv.h b/sysdeps/riscv/bits/fenv.h
new file mode 100644
index 0000000000..a7a8c604ca
--- /dev/null
+++ b/sysdeps/riscv/bits/fenv.h
@@ -0,0 +1,65 @@
+/* Copyright (C) 1998, 1999, 2000, 2017 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+enum
+ {
+ FE_INEXACT = 0x01,
+#define FE_INEXACT FE_INEXACT
+ FE_UNDERFLOW = 0x02,
+#define FE_UNDERFLOW FE_UNDERFLOW
+ FE_OVERFLOW = 0x04,
+#define FE_OVERFLOW FE_OVERFLOW
+ FE_DIVBYZERO = 0x08,
+#define FE_DIVBYZERO FE_DIVBYZERO
+ FE_INVALID = 0x10,
+#define FE_INVALID FE_INVALID
+ };
+
+#define FE_ALL_EXCEPT \
+ (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+enum
+ {
+ FE_TONEAREST = 0x0,
+#define FE_TONEAREST FE_TONEAREST
+ FE_TOWARDZERO = 0x1,
+#define FE_TOWARDZERO FE_TOWARDZERO
+ FE_DOWNWARD = 0x2,
+#define FE_DOWNWARD FE_DOWNWARD
+ FE_UPWARD = 0x3
+#define FE_UPWARD FE_UPWARD
+ };
+
+
+typedef unsigned int fexcept_t;
+typedef unsigned int fenv_t;
+
+/* If the default argument is used we use this value. */
+#define FE_DFL_ENV ((__const fenv_t *) -1)
+
+#if __GLIBC_USE (IEC_60559_BFP_EXT)
+/* Type representing floating-point control modes. */
+typedef unsigned int femode_t;
+
+/* Default floating-point control modes. */
+# define FE_DFL_MODE ((const femode_t *) -1L)
+#endif
diff --git a/sysdeps/riscv/bits/mathdef.h b/sysdeps/riscv/bits/mathdef.h
new file mode 100644
index 0000000000..c0b9be2bd5
--- /dev/null
+++ b/sysdeps/riscv/bits/mathdef.h
@@ -0,0 +1,21 @@
+/* Copyright (C) 2017 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#if !defined _MATH_H && !defined _COMPLEX_H
+# error "Never use <bits/mathdef.h> directly; include <math.h> instead"
+#endif
diff --git a/sysdeps/riscv/bits/mathinline.h b/sysdeps/riscv/bits/mathinline.h
new file mode 100644
index 0000000000..9fd009e362
--- /dev/null
+++ b/sysdeps/riscv/bits/mathinline.h
@@ -0,0 +1,142 @@
+/* Copyright (C) 2011-2015, 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+ 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
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _MATH_H
+# error "Never use <bits/mathinline.h> directly; include <math.h> instead."
+#endif
+
+#ifndef __extern_always_inline
+# define __MATH_INLINE __inline
+#else
+# define __MATH_INLINE __extern_always_inline
+#endif
+
+
+#if defined __USE_ISOC99 && defined __GNUC__
+
+/* Test for negative number. Used in the signbit() macro. */
+__MATH_INLINE int
+__NTH (__signbitf (float __x))
+{
+ return __builtin_signbitf (__x);
+}
+__MATH_INLINE int
+__NTH (__signbit (double __x))
+{
+ return __builtin_signbit (__x);
+}
+
+/* Leave it to the compiler to optimize these if __NO_MATH_ERRNO__. */
+# if defined __riscv_flen && !defined __NO_MATH_ERRNO__
+
+# if __riscv_xlen >= 64
+
+__MATH_INLINE long long int
+__NTH (llrintf (float __x))
+{
+ long long int __res;
+ __asm__ __volatile__ ("fcvt.l.s %0, %1" : "=r" (__res) : "f" (__x));
+ return __res;
+}
+
+__MATH_INLINE long long int
+__NTH (llroundf (float __x))
+{
+ long long int __res;
+ __asm__ __volatile__ ("fcvt.l.s %0, %1, rmm" : "=r" (__res) : "f" (__x));
+ return __res;
+}
+
+# endif /* __riscv_xlen >= 64 */
+
+__MATH_INLINE long int
+__NTH (lrintf (float __x))
+{
+#ifdef __LP64__
+ return (long int) llrintf (__x);
+#else
+ long int __res;
+ __asm__ __volatile__ ("fcvt.w.s %0, %1" : "=r" (__res) : "f" (__x));
+ return __res;
+#endif
+}
+
+__MATH_INLINE long int
+__NTH (lroundf (float __x))
+{
+#ifdef __LP64__
+ return (long int) llroundf (__x);
+#else
+ long int __res;
+ __asm__ __volatile__ ("fcvt.w.s %0, %1, rmm" : "=r" (__res) : "f" (__x));
+ return __res;
+#endif
+}
+
+# endif /* __riscv_flen && !__NO_MATH_ERRNO__ */
+
+/* Leave it to the compiler to optimize these if __NO_MATH_ERRNO__. */
+# if defined __riscv_flen && __riscv_flen >= 64 && !defined __NO_MATH_ERRNO__
+
+# if __riscv_xlen >= 64
+
+__MATH_INLINE long long int
+__NTH (llrint (double __x))
+{
+ long long int __res;
+ __asm__ __volatile__ ("fcvt.l.d %0, %1" : "=r" (__res) : "f" (__x));
+ return __res;
+}
+
+__MATH_INLINE long long int
+__NTH (llround (double __x))
+{
+ long long int __res;
+ __asm__ __volatile__ ("fcvt.l.d %0, %1, rmm" : "=r" (__res) : "f" (__x));
+ return __res;
+}
+
+# endif /* __riscv_xlen >= 64 */
+
+__MATH_INLINE long int
+__NTH (lrint (double __x))
+{
+#ifdef __LP64__
+ return (long int) llrint (__x);
+#else
+ long int __res;
+ __asm__ __volatile__ ("fcvt.w.d %0, %1" : "=r" (__res) : "f" (__x));
+ return __res;
+#endif
+}
+
+__MATH_INLINE long int
+__NTH (lround (double __x))
+{
+#ifdef __LP64__
+ return (long int) llround (__x);
+#else
+ long int __res;
+ __asm__ __volatile__ ("fcvt.w.d %0, %1, rmm" : "=r" (__res) : "f" (__x));
+ return __res;
+#endif
+}
+
+# endif /* __riscv_flen >= 64 && !__NO_MATH_ERRNO__ */
+
+#endif
diff --git a/sysdeps/riscv/fpu_control.h b/sysdeps/riscv/fpu_control.h
new file mode 100644
index 0000000000..ca0fa15a0c
--- /dev/null
+++ b/sysdeps/riscv/fpu_control.h
@@ -0,0 +1,77 @@
+/* FPU control word bits. RISC-V version.
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2006, 2008, 2017
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Olaf Flebbe and Ralf Baechle.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+#include <features.h>
+
+#ifndef __riscv_flen
+
+#define _FPU_RESERVED 0xffffffff
+#define _FPU_DEFAULT 0x00000000
+typedef unsigned int fpu_control_t;
+#define _FPU_GETCW(cw) (cw) = 0
+#define _FPU_SETCW(cw) do { } while (0)
+extern fpu_control_t __fpu_control;
+
+#else /* __riscv_flen */
+
+#define _FPU_RESERVED 0
+#define _FPU_DEFAULT 0
+#define _FPU_IEEE _FPU_DEFAULT
+
+/* Type of the control word. */
+typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
+
+/* Macros for accessing the hardware control word. */
+#define _FPU_GETCW(cw) __asm__ volatile ("frsr %0" : "=r" (cw))
+#define _FPU_SETCW(cw) __asm__ volatile ("fssr %z0" : : "rJ" (cw))
+
+/* Default control word set at startup. */
+extern fpu_control_t __fpu_control;
+
+#define _FCLASS(x) ({ int res; \
+ if (sizeof (x) * 8 > __riscv_flen) __builtin_trap (); \
+ if (sizeof (x) == 4) asm ("fclass.s %0, %1" : "=r" (res) : "f" (x)); \
+ else if (sizeof (x) == 8) asm ("fclass.d %0, %1" : "=r" (res) : "f" (x)); \
+ else __builtin_trap (); \
+ res; })
+
+#define _FCLASS_MINF (1<<0)
+#define _FCLASS_MNORM (1<<1)
+#define _FCLASS_MSUBNORM (1<<2)
+#define _FCLASS_MZERO (1<<3)
+#define _FCLASS_PZERO (1<<4)
+#define _FCLASS_PSUBNORM (1<<5)
+#define _FCLASS_PNORM (1<<6)
+#define _FCLASS_PINF (1<<7)
+#define _FCLASS_SNAN (1<<8)
+#define _FCLASS_QNAN (1<<9)
+#define _FCLASS_ZERO (_FCLASS_MZERO | _FCLASS_PZERO)
+#define _FCLASS_SUBNORM (_FCLASS_MSUBNORM | _FCLASS_PSUBNORM)
+#define _FCLASS_NORM (_FCLASS_MNORM | _FCLASS_PNORM)
+#define _FCLASS_INF (_FCLASS_MINF | _FCLASS_PINF)
+#define _FCLASS_NAN (_FCLASS_SNAN | _FCLASS_QNAN)
+
+#endif /* __riscv_flen */
+
+#endif /* fpu_control.h */
diff --git a/sysdeps/riscv/ieee754.h b/sysdeps/riscv/ieee754.h
new file mode 100644
index 0000000000..f515aa4b36
--- /dev/null
+++ b/sysdeps/riscv/ieee754.h
@@ -0,0 +1,325 @@
+/* Copyright (C) 1992, 1995, 1996, 1999, 2002, 2003, 2017
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _IEEE754_H
+
+#define _IEEE754_H 1
+#include <features.h>
+
+#include <endian.h>
+
+#include <float.h>
+
+__BEGIN_DECLS
+
+union ieee754_float
+ {
+ float f;
+
+ /* This is the IEEE 754 single-precision format. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:8;
+ unsigned int mantissa:23;
+#endif /* Big endian. */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+ unsigned int mantissa:23;
+ unsigned int exponent:8;
+ unsigned int negative:1;
+#endif /* Little endian. */
+ } ieee;
+
+ /* This format makes it easier to see if a NaN is a signalling NaN. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:8;
+ unsigned int quiet_nan:1;
+ unsigned int mantissa:22;
+#endif /* Big endian. */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+ unsigned int mantissa:22;
+ unsigned int quiet_nan:1;
+ unsigned int exponent:8;
+ unsigned int negative:1;
+#endif /* Little endian. */
+ } ieee_nan;
+ };
+
+#define IEEE754_FLOAT_BIAS 0x7f /* Added to exponent. */
+
+
+union ieee754_double
+ {
+ double d;
+
+ /* This is the IEEE 754 double-precision format. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:11;
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa0:20;
+ unsigned int mantissa1:32;
+#endif /* Big endian. */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+# if __FLOAT_WORD_ORDER == __BIG_ENDIAN
+ unsigned int mantissa0:20;
+ unsigned int exponent:11;
+ unsigned int negative:1;
+ unsigned int mantissa1:32;
+# else
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa1:32;
+ unsigned int mantissa0:20;
+ unsigned int exponent:11;
+ unsigned int negative:1;
+# endif
+#endif /* Little endian. */
+ } ieee;
+
+ /* This format makes it easier to see if a NaN is a signalling NaN. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:11;
+ unsigned int quiet_nan:1;
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa0:19;
+ unsigned int mantissa1:32;
+#else
+# if __FLOAT_WORD_ORDER == __BIG_ENDIAN
+ unsigned int mantissa0:19;
+ unsigned int quiet_nan:1;
+ unsigned int exponent:11;
+ unsigned int negative:1;
+ unsigned int mantissa1:32;
+# else
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa1:32;
+ unsigned int mantissa0:19;
+ unsigned int quiet_nan:1;
+ unsigned int exponent:11;
+ unsigned int negative:1;
+# endif
+#endif
+ } ieee_nan;
+ };
+
+#define IEEE754_DOUBLE_BIAS 0x3ff /* Added to exponent. */
+
+#if LDBL_MANT_DIG == 113
+
+union ieee854_long_double
+ {
+ long double d;
+
+ /* This is the IEEE 854 quad-precision format. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:15;
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa0:16;
+ unsigned int mantissa1:32;
+ unsigned int mantissa2:32;
+ unsigned int mantissa3:32;
+#endif /* Big endian. */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa3:32;
+ unsigned int mantissa2:32;
+ unsigned int mantissa1:32;
+ unsigned int mantissa0:16;
+ unsigned int exponent:15;
+ unsigned int negative:1;
+#endif /* Little endian. */
+ } ieee;
+
+ /* This format makes it easier to see if a NaN is a signalling NaN. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:15;
+ unsigned int quiet_nan:1;
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa0:15;
+ unsigned int mantissa1:32;
+ unsigned int mantissa2:32;
+ unsigned int mantissa3:32;
+#endif /* Big endian. */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa3:32;
+ unsigned int mantissa2:32;
+ unsigned int mantissa1:32;
+ unsigned int mantissa0:15;
+ unsigned int quiet_nan:1;
+ unsigned int exponent:15;
+ unsigned int negative:1;
+#endif /* Little endian. */
+ } ieee_nan;
+ };
+
+#define IEEE854_LONG_DOUBLE_BIAS 0x3fff /* Added to exponent. */
+
+#elif LDBL_MANT_DIG == 64
+
+union ieee854_long_double
+ {
+ long double d;
+
+ /* This is the IEEE 854 double-extended-precision format. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:15;
+ unsigned int empty:16;
+ unsigned int mantissa0:32;
+ unsigned int mantissa1:32;
+#endif
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+# if __FLOAT_WORD_ORDER == __BIG_ENDIAN
+ unsigned int exponent:15;
+ unsigned int negative:1;
+ unsigned int empty:16;
+ unsigned int mantissa0:32;
+ unsigned int mantissa1:32;
+# else
+ unsigned int mantissa1:32;
+ unsigned int mantissa0:32;
+ unsigned int exponent:15;
+ unsigned int negative:1;
+ unsigned int empty:16;
+# endif
+#endif
+ } ieee;
+
+ /* This is for NaNs in the IEEE 854 double-extended-precision format. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:15;
+ unsigned int empty:16;
+ unsigned int one:1;
+ unsigned int quiet_nan:1;
+ unsigned int mantissa0:30;
+ unsigned int mantissa1:32;
+#endif
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+# if __FLOAT_WORD_ORDER == __BIG_ENDIAN
+ unsigned int exponent:15;
+ unsigned int negative:1;
+ unsigned int empty:16;
+ unsigned int mantissa0:30;
+ unsigned int quiet_nan:1;
+ unsigned int one:1;
+ unsigned int mantissa1:32;
+# else
+ unsigned int mantissa1:32;
+ unsigned int mantissa0:30;
+ unsigned int quiet_nan:1;
+ unsigned int one:1;
+ unsigned int exponent:15;
+ unsigned int negative:1;
+ unsigned int empty:16;
+# endif
+#endif
+ } ieee_nan;
+ };
+
+#define IEEE854_LONG_DOUBLE_BIAS 0x3fff
+
+#elif LDBL_MANT_DIG == 53
+
+union ieee854_long_double
+ {
+ long double d;
+
+ /* This is the IEEE 754 double-precision format. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:11;
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa0:20;
+ unsigned int mantissa1:32;
+#endif /* Big endian. */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+# if __FLOAT_WORD_ORDER == __BIG_ENDIAN
+ unsigned int mantissa0:20;
+ unsigned int exponent:11;
+ unsigned int negative:1;
+ unsigned int mantissa1:32;
+# else
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa1:32;
+ unsigned int mantissa0:20;
+ unsigned int exponent:11;
+ unsigned int negative:1;
+# endif
+#endif /* Little endian. */
+ } ieee;
+
+ /* This format makes it easier to see if a NaN is a signalling NaN. */
+ struct
+ {
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int negative:1;
+ unsigned int exponent:11;
+ unsigned int quiet_nan:1;
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa0:19;
+ unsigned int mantissa1:32;
+#else
+# if __FLOAT_WORD_ORDER == __BIG_ENDIAN
+ unsigned int mantissa0:19;
+ unsigned int quiet_nan:1;
+ unsigned int exponent:11;
+ unsigned int negative:1;
+ unsigned int mantissa1:32;
+# else
+ /* Together these comprise the mantissa. */
+ unsigned int mantissa1:32;
+ unsigned int mantissa0:19;
+ unsigned int quiet_nan:1;
+ unsigned int exponent:11;
+ unsigned int negative:1;
+# endif
+#endif
+ } ieee_nan;
+ };
+
+#define IEEE854_LONG_DOUBLE_BIAS 0x3ff /* Added to exponent. */
+
+#endif /* LDBL_MANT_DIG == 53 */
+
+__END_DECLS
+
+#endif /* ieee754.h */
diff --git a/sysdeps/riscv/soft-fp/e_sqrtl.c b/sysdeps/riscv/soft-fp/e_sqrtl.c
new file mode 100644
index 0000000000..3241a877ac
--- /dev/null
+++ b/sysdeps/riscv/soft-fp/e_sqrtl.c
@@ -0,0 +1 @@
+#include "sysdeps/aarch64/soft-fp/e_sqrtl.c"
diff --git a/sysdeps/riscv/soft-fp/sfp-machine.h b/sysdeps/riscv/soft-fp/sfp-machine.h
new file mode 100644
index 0000000000..3068b5de78
--- /dev/null
+++ b/sysdeps/riscv/soft-fp/sfp-machine.h
@@ -0,0 +1,93 @@
+#include <fenv.h>
+#include <fpu_control.h>
+
+#if __riscv_xlen == 32
+
+#define _FP_W_TYPE_SIZE 32
+#define _FP_W_TYPE unsigned long
+#define _FP_WS_TYPE signed long
+#define _FP_I_TYPE long
+
+#define _FP_MUL_MEAT_S(R,X,Y) \
+ _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_D(R,X,Y) \
+ _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y) \
+ _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(S,R,X,Y)
+#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_2_udiv(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S _FP_QNANBIT_S
+#define _FP_NANFRAC_D _FP_QNANBIT_D, 0
+#define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0, 0, 0
+
+#else
+
+#define _FP_W_TYPE_SIZE 64
+#define _FP_W_TYPE unsigned long long
+#define _FP_WS_TYPE signed long long
+#define _FP_I_TYPE long long
+
+#define _FP_MUL_MEAT_S(R,X,Y) \
+ _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
+#define _FP_MUL_MEAT_D(R,X,Y) \
+ _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y) \
+ _FP_MUL_MEAT_2_wide_3mul(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
+#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S _FP_QNANBIT_S
+#define _FP_NANFRAC_D _FP_QNANBIT_D
+#define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0
+
+#endif
+
+#define _FP_NANSIGN_S 0
+#define _FP_NANSIGN_D 0
+#define _FP_NANSIGN_Q 0
+
+#define _FP_KEEPNANFRACP 0
+#define _FP_QNANNEGATEDP 0
+
+#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
+ do { \
+ R##_s = _FP_NANSIGN_##fs; \
+ _FP_FRAC_SET_##wc(R,_FP_NANFRAC_##fs); \
+ R##_c = FP_CLS_NAN; \
+ } while (0)
+
+#define _FP_DECL_EX int _frm __attribute__ ((unused));
+#define FP_ROUNDMODE _frm
+
+#define FP_RND_NEAREST FE_TONEAREST
+#define FP_RND_ZERO FE_TOWARDZERO
+#define FP_RND_PINF FE_UPWARD
+#define FP_RND_MINF FE_DOWNWARD
+
+#define FP_EX_INVALID FE_INVALID
+#define FP_EX_OVERFLOW FE_OVERFLOW
+#define FP_EX_UNDERFLOW FE_UNDERFLOW
+#define FP_EX_DIVZERO FE_DIVBYZERO
+#define FP_EX_INEXACT FE_INEXACT
+
+#define _FP_TININESS_AFTER_ROUNDING 1
+
+#ifdef __riscv_flen
+#define FP_INIT_ROUNDMODE \
+do { \
+ __asm__ volatile ("frrm %0" : "=r" (_frm)); \
+} while (0)
+
+#define FP_HANDLE_EXCEPTIONS \
+do { \
+ if (__builtin_expect (_fex, 0)) \
+ __asm__ volatile ("csrs fflags, %0" : : "rK" (_fex)); \
+} while (0)
+#else
+#define FP_INIT_ROUNDMODE _frm = FP_RND_NEAREST
+#endif
--
2.13.0