Commit e43e27cf authored by Damien George's avatar Damien George
Browse files

Merge pull request #356 from iabdalkader/d2f

Implement __aeabi_f2d and __aeabi_d2f
parents 196990b8 5b6008dd
#include <stdint.h>
#include <math.h>
// these 2 functions seem to actually work... no idea why
// replacing with libgcc does not work (probably due to wrong calling conventions)
double __aeabi_f2d(float x) {
// TODO
return 0.0;
typedef float float_t;
typedef union {
float f;
struct {
uint64_t m : 23;
uint64_t e : 8;
uint64_t s : 1;
};
} float_s_t;
typedef union {
double d;
struct {
uint64_t m : 52;
uint64_t e : 11;
uint64_t s : 1;
};
} double_s_t;
double __attribute__((pcs("aapcs"))) __aeabi_f2d(float x) {
float_s_t fx={0};
double_s_t dx={0};
fx.f = x;
dx.s = (fx.s);
dx.e = (fx.e-127+1023) & 0x7FF;
dx.m = fx.m;
dx.m <<=(52-23); // left justify
return dx.d;
}
float __aeabi_d2f(double x) {
// TODO
return 0.0;
float __attribute__((pcs("aapcs"))) __aeabi_d2f(double x) {
float_s_t fx={0};
double_s_t dx={0};
dx.d = x;
fx.s = (dx.s);
fx.e = (dx.e-1023+127) & 0xFF;
fx.m = (dx.m>>(52-23)); // right justify
return fx.f;
}
double __aeabi_dmul(double x , double y) {
return 0.0;
}
/*
double sqrt(double x) {
// TODO
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment