[PATCH] libc: replace libc/internal/libm.h with a symlink to musl original

[Waldemar Kozaczuk]

This file was originally copied from earlier version of musl and
never changed on OSv side. It only differs with these lines from the
current musl original:
```
/* should be in math.h, which we can't include at the moment */
double scalbn(double x, int exp);
int __isnan(double x);
```

So let us replaces it with a symlink to original musl.

Signed-off-by: Waldemar Kozaczuk <jwkoz...@gmail.com>
---
libc/internal/libm.h | 177 +------------------------------------------
1 file changed, 1 insertion(+), 176 deletions(-)
mode change 100644 => 120000 libc/internal/libm.h

diff --git a/libc/internal/libm.h b/libc/internal/libm.h
deleted file mode 100644
index 3f0622ca..00000000
--- a/libc/internal/libm.h
+++ /dev/null
@@ -1,176 +0,0 @@
-/* origin: FreeBSD /usr/src/lib/msun/src/math_private.h */
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-#ifndef _LIBM_H
-#define _LIBM_H
-
-#include <stdint.h>
-#include <float.h>
-#include "math.h"
-#include <complex.h>
-
-#include "longdbl.h"
-
-#include "libc.h"
-
-union fshape {
- float value;
- uint32_t bits;
-};
-
-union dshape {
- double value;
- uint64_t bits;
-};
-
-#define FORCE_EVAL(x) do { \
- if (sizeof(x) == sizeof(float)) { \
- volatile float __x; \
- __x = (x); \
- } else if (sizeof(x) == sizeof(double)) { \
- volatile double __x; \
- __x = (x); \
- } else { \
- volatile long double __x; \
- __x = (x); \
- } \
-} while(0)
-
-/* Get two 32 bit ints from a double. */
-#define EXTRACT_WORDS(hi,lo,d) \
-do { \
- union dshape __u; \
- __u.value = (d); \
- (hi) = __u.bits >> 32; \
- (lo) = (uint32_t)__u.bits; \
-} while (0)
-
-/* Get a 64 bit int from a double. */
-#define EXTRACT_WORD64(i,d) \
-do { \
- union dshape __u; \
- __u.value = (d); \
- (i) = __u.bits; \
-} while (0)
-
-/* Get the more significant 32 bit int from a double. */
-#define GET_HIGH_WORD(i,d) \
-do { \
- union dshape __u; \
- __u.value = (d); \
- (i) = __u.bits >> 32; \
-} while (0)
-
-/* Get the less significant 32 bit int from a double. */
-#define GET_LOW_WORD(i,d) \
-do { \
- union dshape __u; \
- __u.value = (d); \
- (i) = (uint32_t)__u.bits; \
-} while (0)
-
-/* Set a double from two 32 bit ints. */
-#define INSERT_WORDS(d,hi,lo) \
-do { \
- union dshape __u; \
- __u.bits = ((uint64_t)(hi) << 32) | (uint32_t)(lo); \
- (d) = __u.value; \
-} while (0)
-
-/* Set a double from a 64 bit int. */
-#define INSERT_WORD64(d,i) \
-do { \
- union dshape __u; \
- __u.bits = (i); \
- (d) = __u.value; \
-} while (0)
-
-/* Set the more significant 32 bits of a double from an int. */
-#define SET_HIGH_WORD(d,hi) \
-do { \
- union dshape __u; \
- __u.value = (d); \
- __u.bits &= 0xffffffff; \
- __u.bits |= (uint64_t)(hi) << 32; \
- (d) = __u.value; \
-} while (0)
-
-/* Set the less significant 32 bits of a double from an int. */
-#define SET_LOW_WORD(d,lo) \
-do { \
- union dshape __u; \
- __u.value = (d); \
- __u.bits &= 0xffffffff00000000ull; \
- __u.bits |= (uint32_t)(lo); \
- (d) = __u.value; \
-} while (0)
-
-/* Get a 32 bit int from a float. */
-#define GET_FLOAT_WORD(i,d) \
-do { \
- union fshape __u; \
- __u.value = (d); \
- (i) = __u.bits; \
-} while (0)
-
-/* Set a float from a 32 bit int. */
-#define SET_FLOAT_WORD(d,i) \
-do { \
- union fshape __u; \
- __u.bits = (i); \
- (d) = __u.value; \
-} while (0)
-
-/* fdlibm kernel functions */
-
-int __rem_pio2_large(double*,double*,int,int,int);
-
-int __rem_pio2(double,double*);
-double __sin(double,double,int);
-double __cos(double,double);
-double __tan(double,double,int);
-double __expo2(double);
-double complex __ldexp_cexp(double complex,int);
-
-int __rem_pio2f(float,double*);
-float __sindf(double);
-float __cosdf(double);
-float __tandf(double,int);
-float __expo2f(float);
-float complex __ldexp_cexpf(float complex,int);
-
-int __rem_pio2l(long double, long double *);
-long double __sinl(long double, long double, int);
-long double __cosl(long double, long double);
-long double __tanl(long double, long double, int);
-
-/* polynomial evaluation */
-long double __polevll(long double, const long double *, int);
-long double __p1evll(long double, const long double *, int);
-
-#if 0
-/* Attempt to get strict C99 semantics for assignment with non-C99 compilers. */
-#define STRICT_ASSIGN(type, lval, rval) do { \
- volatile type __v = (rval); \
- (lval) = __v; \
-} while (0)
-#else
-/* Should work with -fexcess-precision=standard (>=gcc-4.5) or -ffloat-store */
-#define STRICT_ASSIGN(type, lval, rval) ((lval) = (type)(rval))
-#endif
-
-/* should be in math.h, which we can't include at the moment */
-double scalbn(double x, int exp);
-int __isnan(double x);
-
-
-#endif
diff --git a/libc/internal/libm.h b/libc/internal/libm.h
new file mode 120000
index 00000000..cac108b1
--- /dev/null
+++ b/libc/internal/libm.h
@@ -0,0 +1 @@
+../../musl/src/internal/libm.h
\ No newline at end of file
--
2.26.2

[Commit Bot]

From: Waldemar Kozaczuk <jwkoz...@gmail.com>
Committer: Nadav Har'El <n...@scylladb.com>
Branch: master

libc: replace libc/internal/libm.h with a symlink to musl original

This file was originally copied from earlier version of musl and
never changed on OSv side. It only differs with these lines from the
current musl original:
```
/* should be in math.h, which we can't include at the moment */
double scalbn(double x, int exp);
int __isnan(double x);
```

So let us replaces it with a symlink to original musl.

Signed-off-by: Waldemar Kozaczuk <jwkoz...@gmail.com>

Message-Id: <20200830132355.11...@gmail.com>

---
diff --git a/libc/internal/libm.h b/libc/internal/libm.h
--- a/libc/internal/libm.h
+++ b/libc/internal/libm.h

--- a/libc/internal/libm.h