xobs
/
circuitpython
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

lib/libm: Remove implementation of log2f, use MP_NEED_LOG2 instead.

This commit is contained in:
Damien George 2017-10-04 21:48:14 +11:00
parent d8d4e4dfbe
commit 81a06d2c9c
2 changed files with 3 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
lib/libm/math.c
View File

@ -48,16 +48,6 @@ float copysignf(float x, float y) {
}
#endif
// some compilers define log2f in terms of logf
#ifdef log2f
#undef log2f
#endif
// some compilers have _M_LN2 defined in math.h, some don't
#ifndef _M_LN2
#define _M_LN2 (0.69314718055994530942)
#endif
float log2f(float x) { return logf(x) / (float)_M_LN2; }
static const float _M_LN10 = 2.30258509299404; // 0x40135d8e
float log10f(float x) { return logf(x) / (float)_M_LN10; }

3
ports/stm32/mpconfigport.h
View File

@ -335,6 +335,9 @@ static inline mp_uint_t disable_irq(void) {
} while (0);
#endif
// We need an implementation of the log2 function which is not a macro
#define MP_NEED_LOG2 (1)
// There is no classical C heap in bare-metal ports, only Python
// garbage-collected heap. For completeness, emulate C heap via
// GC heap. Note that MicroPython core never uses malloc() and friends,