| /picolibc-latest/newlib/libm/common/ |
| D | pow_log_data.c | 4 SPDX-License-Identifier: BSD-3-Clause
20 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
37 .ln2hi = 0x1.62e42fefa3800p-1,
38 .ln2lo = 0x1.ef35793c76730p-45,
41 // relative error: 0x1.11922ap-70
42 // in -0x1.6bp-8 0x1.6bp-8
44 -0x1p-1,
45 0x1.555555555556p-2 * -2,
46 -0x1.0000000000006p-2 * -2,
47 0x1.999999959554ep-3 * 4,
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| D | s_isnan.c | 7 * Developed at SunPro, a Sun Microsystems, Inc. business.
16 …>>, and <<isnormal>>---floating-point classification macros; <<finite>>, <<finitef>>, <<isinf>>, <…
49 int fpclassify(real-floating <[x]>);
50 int isfinite(real-floating <[x]>);
51 int isinf(real-floating <[x]>);
52 int isnan(real-floating <[x]>);
53 int isnormal(real-floating <[x]>);
66 defined for use in classifying floating-point numbers. This is a help because
68 "real-floating" indicates that the argument is an expression of real floating
69 type. These function-like macros are C99 and POSIX-compliant, and should be
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| /picolibc-latest/newlib/ |
| D | README | 1 README for newlib-4.2.0 release
2 (mostly cribbed from the README in the gdb-4.13 release)
4 This is `newlib', a simple ANSI C library, math library, and collection
7 Prior to the 3.0.0 release, newlib supported both ANSI and K&R-style
10 The newlib and libgloss subdirectories are a collection of software from
17 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 Unpacking and Installation -- quick overview
23 When you unpack the newlib-4.2.0.tar.gz file, you'll find a directory
24 called `newlib-4.2.0', which contains many files. Interesting ones:
25 COPYING* - License files for the sources
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| /picolibc-latest/newlib/libm/machine/spu/headers/ |
| D | recipf4.h | 1 /* -------------------------------------------------------------- */
13 /* - Redistributions of source code must retain the above copyright*/
16 /* - Redistributions in binary form must reproduce the above */
21 /* - Neither the name of IBM Corporation nor the names of its */
29 /* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
39 /* -------------------------------------------------------------- */
56 static __inline vector float _recipf4(vector float a) in _recipf4() argument
58 /* This function has been designed to provide a in _recipf4()
61 * single precision input <a>. This includes: in _recipf4()
66 * mode of the processor - truncated toward zero. in _recipf4()
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| D | divf4.h | 1 /* -------------------------------------------------------------- */
13 /* - Redistributions of source code must retain the above copyright*/
16 /* - Redistributions in binary form must reproduce the above */
21 /* - Neither the name of IBM Corporation nor the names of its */
29 /* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
39 /* -------------------------------------------------------------- */
56 static __inline vector float _divf4(vector float a, vector float b) in _divf4() argument
59 /* This function has been designed to provide a in _divf4()
62 * single precision inputs <a> and <b>. This includes: in _divf4()
67 * mode of the processor - truncated toward zero. in _divf4()
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| /picolibc-latest/newlib/libc/tinystdio/ |
| D | stdio_private.h | 19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 /* $Id: stdio_private.h 847 2005-09-06 18:49:15Z joerg_wunsch $ */
49 #include <stdio-bufio.h>
96 * non-const as in the generic case, this buffer is obtained
100 * a chance to get write access to it again.
138 #define _FDEV_BUFIO_FD(bf) ((int)((intptr_t) (bf)->ptr))
143 * callbacks (one with an int and the other with a pointer), they are
156 if (!(bf->bflags & __BFPTR)) in bufio_read()
157 return (bf->read_int)(_FDEV_BUFIO_FD(bf), buf, count); in bufio_read()
159 return (bf->read_ptr)((void *) bf->ptr, buf, count); in bufio_read()
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| /picolibc-latest/doc/ |
| D | os.md | 3 Picolibc is designed to be operating-system independent, so it doesn't
15 complex file operations so that a minimal system can easily support
16 the former with only a few functions.
20 FILE objects. The pointers may reside in read-only memory, but the
21 FILE objects may not. A single FILE object may be used for all three
43 It also contains a pointer to an optional `flush` function, which, if
55 These functions are used to initialize a FILE structure:
62 This defines a FILE which can read and write characters using the putc
68 |-------------------|------------|--------------------|
82 Support for these requires malloc/free along with a handful of
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| D | locking.md | 3 When newlib-multithread and newlib-retargetable-locking are enabled,
6 that a single-threaded application can still use a Picolibc compiled
7 with locking enabled. An application needing locking must provide a
12 Picolibc has a single global lock for APIs that share global
21 Tinystdio (the default stdio) uses per-file locks for the buffered
26 The legacy stdio implementation is full of locking, and has per-file
33 * newlib-retargetable-locking. When 'true', locking operations are
36 * newlib-multithread. When 'true', the library is built with
40 interrelated as to make them effectively co-dependent, so users must
45 When newlib-multithread and newlib-retargetable-locking are enabled
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| D | using.md | 4 running either no operating system or a small RTOS. It is designed to
23 the users have everything in place. But some third-party toolchains
25 it is not possible as these headers have compiler-specific parts and
36 compile a single file and generate a .o file:
38 $ gcc --specs=picolibc.specs -c foo.c
42 the file. If installed in a separate location, you will need to
45 $ gcc --specs=/usr/local/picolibc/picolibc.specs -c foo.c
47 When building for an embedded system, you'll probably need to use a
48 longer name for the compiler, something like `riscv-unknown-elf-gcc`
49 or `arm-none-eabi-gcc`.
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| /picolibc-latest/newlib/libc/string/ |
| D | wcwidth.c | 4 <<wcwidth>>---number of column positions of a wide-character code
16 shall ensure that the value of <[wc]> is a character representable
17 as a wint_t (combining Unicode surrogate pairs into single 21-bit
18 Unicode code points), and is a wide-character code corresponding to a
22 The <<wcwidth>> function shall either return 0 (if <[wc]> is a null
23 wide-character code), or return the number of column positions to
24 be occupied by the wide-character code <[wc]>, or return -1 (if <[wc]>
25 does not correspond to a printable wide-character code).
34 * IEEE Std 1002.1-2001) for Unicode.
38 * In fixed-width output devices, Latin characters all occupy a single
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| /picolibc-latest/ |
| D | README.md | 2 Copyright © 2018-2023 Keith Packard
7 [AVR Libc](https://www.nongnu.org/avr-libc/).
17 Picolibc source comes from a variety of places and has a huge variety
19 from Newlib, none of the GPL-related bits used to build the library
20 are left in the repository, so all of the source code uses BSD-like
21 licenses, a mixture of 2- and 3- clause BSD itself and a variety of
24 There are two files used for testing printf, test/printf-tests.c and
26 later. There is also a shell script, GeneratePicolibcCrossFile.sh
28 as a helper for people building the library, but not used by picolibc
32 license information in the Debian standard machine-readable format. It
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| /picolibc-latest/newlib/libm/ld/ld80/ |
| D | e_hypotl.c | 6 * Developed at SunPro, a Sun Microsystems, Inc. business.
16 * If (assume round-to-nearest) z=x*x+y*y
24 * (if possible, set rounding to round-to-nearest)
27 * where x1 = x with lower 32 bits cleared, x2 = x-x1; else
29 * t1*yy1+((x-y)*(x-y)+(t1*y2+t2*y))
30 * where t1 = 2x with lower 32 bits cleared, t2 = 2x-t1,
31 * yy1= y with lower 32 bits chopped, y2 = y-yy1.
37 * hypot(x,y) is INF if x or y is +INF or -INF; else
50 long double a,b,t1,t2,yy1,y2,w; in hypotl() local
57 if(eb > ea) {a=y;b=x;j=ea; ea=eb;eb=j;} else {a=x;b=y;} in hypotl()
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| /picolibc-latest/newlib/libm/math/ |
| D | sf_jn.c | 1 /* ef_jn.c -- float version of e_jn.c.
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
27 float a, b, temp, di; in jnf() local
30 /* J(-n,x) = (-1)^n * J(n, x), J(n, -x) = (-1)^n * J(n, x) in jnf()
31 * Thus, J(-n,x) = J(n,-x) in jnf()
39 n = -n; in jnf()
40 x = -x; in jnf()
47 sgn = (n & 1) & (hx >> 31); /* even n -- 0, odd n -- sign(x) */ in jnf()
52 /* Safe to use J(n+1,x)=2n/x *J(n,x)-J(n-1,x) */ in jnf()
53 a = j0f(x); in jnf()
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| D | s_hypot.c | 7 * Developed at SunPro, a Sun Microsystems, Inc. business.
17 * If (assume round-to-nearest) z=x*x+y*y
25 * (if possible, set rounding to round-to-nearest)
28 * where x1 = x with lower 32 bits cleared, x2 = x-x1; else
30 * t1*y1+((x-y)*(x-y)+(t1*y2+t2*y))
31 * where t1 = 2x with lower 32 bits cleared, t2 = 2x-t1,
32 * y1= y with lower 32 bits chopped, y2 = y-y1.
38 * hypot(x,y) is INF if x or y is +INF or -INF; else
53 __float64 a = x, b = y, t1, t2, y1, y2, w; in hypot64() local
61 a = y; in hypot64()
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| D | sf_hypot.c | 1 /* ef_hypot.c -- float version of e_hypot.c.
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
21 float a = x, b = y, t1, t2, y1, y2, w; in hypotf() local
33 SET_FLOAT_WORD(a, ha); /* a <- |a| */ in hypotf()
34 SET_FLOAT_WORD(b, hb); /* b <- |b| */ in hypotf()
35 if ((ha - hb) > 0xf000000L) { in hypotf()
36 return a + b; in hypotf()
39 if (ha > 0x58800000L) { /* a>2**50 */ in hypotf()
41 w = a + b; /* for sNaN */ in hypotf()
43 w = a; in hypotf()
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| D | s_jn.c | 6 * Developed at SunPro, a Sun Microsystems, Inc. business.
19 * y0(0)=y1(0)=yn(n,0) = -inf with division by zero signal;
20 * y0(-ve)=y1(-ve)=yn(n,-ve) are NaN with invalid signal.
26 * for n>x, a continued fraction approximation to
27 * j(n,x)/j(n-1,x) is evaluated and then backward
28 * recursion is used starting from a supposed value
44 invsqrtpi = _F_64(5.64189583547756279280e-01), /* 0x3FE20DD7, 0x50429B6D */
54 __float64 a, b, temp, di; in jn64() local
63 /* J(-n,x) = (-1)^n * J(n, x), J(n, -x) = (-1)^n * J(n, x) in jn64()
64 * Thus, J(-n,x) = J(n,-x) in jn64()
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| /picolibc-latest/newlib/libm/ld/ld128/ |
| D | e_hypotl.c | 6 * Developed at SunPro, a Sun Microsystems, Inc. business.
16 * If (assume round-to-nearest) z=x*x+y*y
24 * (if possible, set rounding to round-to-nearest)
27 * where x1 = x with lower 64 bits cleared, x2 = x-x1; else
29 * t1*yy1+((x-y)*(x-y)+(t1*y2+t2*y))
30 * where t1 = 2x with lower 64 bits cleared, t2 = 2x-t1,
31 * yy1= y with lower 64 bits chopped, y2 = y-yy1.
37 * hypotl(x,y) is INF if x or y is +INF or -INF; else
50 long double a,b,t1,t2,yy1,y2,w; in hypotl() local
57 if(hb > ha) {a=y;b=x;j=ha; ha=hb;hb=j;} else {a=x;b=y;} in hypotl()
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| /picolibc-latest/newlib/libc/stdlib/ |
| D | a64l.c | 4 <<a64l>>, <<l64a>>---convert between radix-64 ASCII string and long
17 Conversion is performed between long and radix-64 characters. The
20 is split up into a maximum of 5 groups of 6 bits and possibly one
23 Each group of 6 bits forms a value from 0--63 which is translated into
24 a character as follows:
29 o 2--11 = '0' to '9'
30 o 12--37 = 'A' to 'Z'
31 o 38--63 = 'a' to 'z'
32 O-
34 When the remaining bits are zero or all bits have been translated, a
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| D | mprec.c | 9 * is included in all copies of any software which is or includes a copy
22 AT&T Bell Laboratories, Room 2C-463
24 Murray Hill, NJ 07974-2070
25 U.S.A.
29 /* strtod for IEEE-, VAX-, and IBM-arithmetic machines.
31 * This strtod returns a nearest machine number to the input decimal
33 * broken by the IEEE round-even rule. Otherwise ties are broken by
37 * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 92-101].
41 * 1. We only require IEEE, IBM, or VAX double-precision
42 * arithmetic (not IEEE double-extended).
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| D | mallocr.c | 8 /* ---------- To make a malloc.h, start cutting here ------------ */
11 A version of malloc/free/realloc written by Doug Lea and released to the
21 Note: This version differs from 2.6.4 only by correcting a
28 This is not the fastest, most space-conserving, most portable, or
30 while also being among the most space-conserving, portable and tunable.
31 Consistent balance across these factors results in a good general-purpose
32 allocator. For a high-level description, see
40 Return a pointer to a newly allocated chunk of at least n bytes, or null
45 Return a pointer to a chunk of size n that contains the same data
49 #define REALLOC_ZERO_BYTES_FREES below is set, realloc with a
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| /picolibc-latest/newlib/libc/stdio/ |
| D | fflush.c | 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 <<fflush>>, <<fflush_unlocked>>---flush buffered file output
56 Additionally, if <[fp]> is a seekable input stream visiting a file
58 unread byte, useful for obeying POSIX semantics when ending a process
61 <<fflush_unlocked>> is a non-thread-safe version of <<fflush>>.
62 <<fflush_unlocked>> may only safely be used within a scope
64 function may safely be used in a multi-threaded program if and only
66 object, as is the case after a successful call to the flockfile() or
71 reentrant versions, where the extra argument <[reent]> is a pointer to
72 a reentrancy structure, and <[fp]> must not be NULL.
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| D | fmemopen.c | 8 <<fmemopen>>---open a stream around a fixed-length string
19 <<fmemopen>> creates a seekable <<FILE>> stream that wraps a
20 fixed-length buffer of <[size]> bytes starting at <[buf]>. The stream
27 The stream maintains a current position, which moves according to
29 The stream also maintains a current file size, which is never greater
34 <[mode]> starts with <<a>>, the position and file size start at the
42 buffer). When the stream is flushed or closed after a write that
43 changed the file size, a NUL byte is written at the current position
44 if there is still room; if the stream is not also open for reading, a
46 stream has exceeded <[size]>, so that a write-only <[buf]> is always
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| /picolibc-latest/test/libc-testsuite/ |
| D | fnmatch.c | 2 * Copyright © 2005-2020 Rich Felker
5 * a copy of this software and associated documentation files (the
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
30 /* adapted from dietlibc's test-newfnmatch.c */
58 for (; map->str; map++) { in printflags()
59 if (map->val && (flags & map->val) == map->val) { in printflags()
60 printf("%s%s", sep, map->str); in printflags()
62 flags &= ~(map->val); in printflags()
80 { "*.a", "foo.c", 0, FNM_NOMATCH },
84 { "a\\*.c", "a*.c", FNM_NOESCAPE, FNM_NOMATCH },
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| /picolibc-latest/scripts/ |
| D | run-arm | 3 # SPDX-License-Identifier: BSD-3-Clause
26 # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37 qemu="qemu-system-arm"
51 cpu_arch=`arm-none-eabi-readelf -A "$elf" | awk '/Tag_CPU_arch:/ { print $2 }'`
52 cpu_profile=`arm-none-eabi-readelf -A "$elf" | awk '/Tag_CPU_arch_profile:/ { print $2 }'`
53 fp_arch=`arm-none-eabi-readelf -A "$elf" | awk '/Tag_FP_arch/ { print $2 }'`
54 fp_use=`arm-none-eabi-readelf -A "$elf" | awk '/Tag_ABI_HardFP_use/ { print $2 }'`
55 ram_addr=`arm-none-eabi-readelf -l "$elf" | awk '/LOAD.*RW/ { if (min_va == 0 || $3 < min_va) min_v…
64 v6S-M/Microcontroller)
65 cpu=cortex-m0
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| /picolibc-latest/newlib/libm/test/ |
| D | math.c | 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 These vectors were originally generated on a sun3 with a 68881 using
24 Each function is called with a variety of interesting arguments.
27 useful to test - eg sin(1e30) is pointless - the arg has to be
29 left to evaluate with - any number would be just as precise as any
74 (f) = -__builtin_nansf(""); \
79 (f) = -__builtin_nanf(""); \
89 (d) = -__builtin_nans(""); \
94 (d) = -__builtin_nan(""); \
117 thedouble(p->qs[id].msw, p->qs[id].lsw, &correct.value); in ffcheck_id()
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