| 1 | #ifndef CALL_APSR_H |
| 2 | #define CALL_APSR_H |
| 3 | |
| 4 | #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
| 5 | |
| 6 | union cpsr { |
| 7 | struct { |
| 8 | uint32_t filler : 28; |
| 9 | uint32_t v : 1; |
| 10 | uint32_t c : 1; |
| 11 | uint32_t z : 1; |
| 12 | uint32_t n : 1; |
| 13 | } flags; |
| 14 | uint32_t value; |
| 15 | }; |
| 16 | |
| 17 | #else |
| 18 | |
| 19 | union cpsr { |
| 20 | struct { |
| 21 | uint32_t n : 1; |
| 22 | uint32_t z : 1; |
| 23 | uint32_t c : 1; |
| 24 | uint32_t v : 1; |
| 25 | uint32_t filler : 28; |
| 26 | } flags; |
| 27 | uint32_t value; |
| 28 | }; |
| 29 | |
| 30 | #endif |
| 31 | |
| 32 | __attribute__((noinline, pcs("aapcs" ))) static uint32_t call_apsr_f(float a, float b, |
| 33 | __attribute__((pcs("aapcs" ))) void (*fn)(float, float)) { |
| 34 | uint32_t result; |
| 35 | fn(a, b); |
| 36 | asm volatile("mrs %0, apsr" |
| 37 | : "=r" (result)); |
| 38 | return result; |
| 39 | } |
| 40 | |
| 41 | __attribute__((noinline, pcs("aapcs" ))) static uint32_t call_apsr_d(double a, double b, |
| 42 | __attribute__((pcs("aapcs" ))) void (*fn)(double, double)) { |
| 43 | uint32_t result; |
| 44 | fn(a, b); |
| 45 | asm volatile("mrs %0, apsr" |
| 46 | : "=r" (result)); |
| 47 | return result; |
| 48 | } |
| 49 | |
| 50 | #endif // CALL_APSR_H |
| 51 | |