diff options
| -rw-r--r-- | firmware/export/system.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/firmware/export/system.h b/firmware/export/system.h index eb5bb52..150f872 100644 --- a/firmware/export/system.h +++ b/firmware/export/system.h @@ -463,9 +463,16 @@ static inline unsigned long swap32(unsigned long value) result[ 7.. 0] = value[31..24]; */ { - unsigned long hi = swap16(value >> 16); - unsigned long lo = swap16(value & 0xffff); - return (lo << 16) | hi; + unsigned int tmp; + + asm volatile ( + "eor %1, %0, %0, ror #16 \n\t" + "bic %1, %1, #0xff0000 \n\t" + "mov %0, %0, ror #8 \n\t" + "eor %0, %0, %1, lsr #8 \n\t" + : "+r" (value), "=r" (tmp) + ); + return value; } |