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AP_HAL: ftoa_engine: stop using Progmem.h

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This commit is contained in:
Lucas De Marchi 2015-12-23 10:43:34 -02:00
parent f19e1e6c70
commit e751d632e6
1 changed files with 2 additions and 6 deletions
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8
libraries/AP_HAL/utility/ftoa_engine.cpp
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@ -34,10 +34,6 @@
#include <AP_Common/AP_Common.h>
#include <AP_HAL/AP_HAL.h>
#include <AP_Progmem/AP_Progmem.h>
#define PGM_INT8(addr) (int8_t)pgm_read_byte((const char *)addr)
#define PGM_UINT32(addr) pgm_read_dword((const uint32_t *)addr)
/*
* 2^b ~= f * r * 10^e
@ -127,12 +123,12 @@ int16_t ftoa_engine(float val, char *buf, uint8_t precision, uint8_t maxDecimals
if (exp != 0) frac |= (1UL<<23);
uint8_t idx = exp>>3;
int8_t exp10 = PGM_INT8(&exponentTable[idx]);
int8_t exp10 = exponentTable[idx];
// We COULD try making the multiplication in situ, where we make
// frac and a 64 bit int overlap in memory and select/weigh the
// upper 32 bits that way. For starters, this is less risky:
int64_t prod = (int64_t)frac * (int64_t)PGM_UINT32(&factorTable[idx]);
int64_t prod = (int64_t)frac * (int64_t)factorTable[idx];
// The expConvFactorTable are factor are correct iff the lower 3 exponent
// bits are 1 (=7). Else we need to compensate by divding frac.