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Implement opt Q for fixed-point precision, and q literals (e.g. 12.34q8) (#958)

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Fixes #957

Co-authored-by: ISSOtm <eldredhabert0@gmail.com>
This commit is contained in:
Rangi
2022-09-04 18:47:32 -04:00
committed by GitHub
parent 889302a9e2
commit 98a6dffbca
20 changed files with 253 additions and 56 deletions
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23
src/asm/fixpoint.c
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@@ -17,17 +17,24 @@
#include "asm/symbol.h"
#include "asm/warning.h"
#define fix2double(i) ((double)((i) / 65536.0))
#define double2fix(d) ((int32_t)round((d) * 65536.0))
// pi radians == 32768 fixed-point "degrees"
#define fdeg2rad(f) ((f) * (M_PI / 32768.0))
#define rad2fdeg(r) ((r) * (32768.0 / M_PI))
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#define fix2double(i) ((double)((i) / fix_PrecisionFactor()))
#define double2fix(d) ((int32_t)round((d) * fix_PrecisionFactor()))
// pi*2 radians == 2**fixPrecision fixed-point "degrees"
#define fdeg2rad(f) ((f) * (M_PI * 2) / fix_PrecisionFactor())
#define rad2fdeg(r) ((r) * fix_PrecisionFactor() / (M_PI * 2))
uint8_t fixPrecision;
double fix_PrecisionFactor(void)
{
return pow(2.0, fixPrecision);
}
void fix_Print(int32_t i)
{
uint32_t u = i;
@@ -38,7 +45,7 @@ void fix_Print(int32_t i)
sign = "-";
}
printf("%s%" PRIu32 ".%05" PRIu32, sign, u >> 16,
printf("%s%" PRIu32 ".%05" PRIu32, sign, u >> fixPrecision,
((uint32_t)(fix2double(u) * 100000 + 0.5)) % 100000);
}