#ifndef CALL_APSR_H
#define CALL_APSR_H
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
union cpsr {
struct {
uint32_t filler : 28;
uint32_t v : 1;
uint32_t c : 1;
uint32_t z : 1;
uint32_t n : 1;
} flags;
uint32_t value;
};
#else
union cpsr {
struct {
uint32_t n : 1;
uint32_t z : 1;
uint32_t c : 1;
uint32_t v : 1;
uint32_t filler : 28;
} flags;
uint32_t value;
};
#endif
__attribute__((noinline, pcs("aapcs"))) static uint32_t call_apsr_f(float a, float b,
__attribute__((pcs("aapcs"))) void (*fn)(float, float)) {
uint32_t result;
fn(a, b);
asm volatile("mrs %0, apsr"
: "=r"(result));
return result;
}
__attribute__((noinline, pcs("aapcs"))) static uint32_t call_apsr_d(double a, double b,
__attribute__((pcs("aapcs"))) void (*fn)(double, double)) {
uint32_t result;
fn(a, b);
asm volatile("mrs %0, apsr"
: "=r"(result));
return result;
}
#endif // CALL_APSR_H