有關 AVR 單片機乘法等數學運算等問題
請問各位,在 IAR AVR 中是否支持一般 C 語言中的 + - * / 等數學運算 ?如果支持,那 IAR AVR 的庫函數中為什麼還有很多的數學運算函數??,像以下的這些?
望各位賜教.
INTRINSICS.H
#ifdef __HAS_MUL__
__intrinsic unsigned int__multiply_unsigned(unsigned char, unsigned char);
__intrinsic signed int __multiply_signed(signed char, signed char);
__intrinsic signed int __multiply_signed_with_unsigned(signed char, unsigned char);
__intrinsic unsigned int__fractional_multiply_unsigned(unsigned char, unsigned char);
__intrinsic signed int __fractional_multiply_signed(signed char, signed char);
__intrinsic signed int __fractional_multiply_signed_with_unsigned(signed char, signed char);
#endif
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