int bitCount(int x) { int _mask1 = (0x55)|(0x55<<8); int _mask2 = (0x33)|(0x33<<8); int _mask3 = (0x0f)|(0x0f<<8); int mask1 = _mask1|(_mask1<<16); int mask2 = _mask2|(_mask2<<16); int mask3 = _mask3|(_mask3<<16); int mask4 = (0xff)|(0xff...
我也是完全没有思路,最终借鉴的答案: int bitCount(int x) { int _mask1=(0x55)|((0x55)<<8); int _mask2=(0x33)|((0x33)<<8); int _mask3=(0x0f)|((0x0f)<<8); int mask1=(_mask1)|(_mask1<<16);//0101... int mask2=(_mask2)|(_mask2<<16);//00110011... int m...
* bitCount - returns count of number of 1's in word * Examples: bitCount(5) = 2, bitCount(7) = 3 * Legal ops: ! ~ & ^ | + << >> * Max ops: 40 * Rating: 4 */ intbitCount(intx){ //造数 int_tmp1 =0x55| (0x55<<8);//0x00005555 int_tmp2 =0x33| (0x33<<8);...
cannot use arrays, structs, or unions. 使用 数组,结构体,共用体 6. Use any floating point data types, operations, or constants. 使用任意浮点数类型,操作,常亮。 NOTES: 1. Use the dlc (data lab checker) compiler (described in the handout) to check the legality of your solutions. 使用dlc检...
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CSAPPLab1 写了作业水一篇目录CSAPPLab1得分图bitAndgetBytelogicalShiftbitCountbangtminfitsBitsdivpwr2negateisPositiveisLessOrEqualilog2float_negfloat_i2ffloat_twicebits.cCSAPPLab1写了作业水一篇(记录一下人多菜博客园的三级标题好小bits.c得分图本地的fitsBi ...
CSAPP lab1 datalab-handout 操作数 这是一个关于机器级的整数、浮点数表示和位运算的实验。要求用给定的操作符、尽可能少的操作数去实现对应的函数功能。 完整的实验包:链接: https://pan.baidu.com/s/1xUBi3XDlidPQFNexbjXoLw 密码: 2333 以下是全部函数的代码:...
* bitCount - returns count of number of 1's in word * Examples: bitCount(5) = 2, bitCount(7) = 3 * Legal ops: ! ~ & ^ | + << >> * Max ops: 40 * Rating: 4 */intbitCount(intx){inta=0x55|(0x55<<8);intb=0x33|(0x33<<8);intc=0x0f|(0x0f<<8);intd=0xff|(0x...
BitCount.png 10. /* * bitMask - Generate a mask consisting of all 1's * lowbit and highbit * Examples: bitMask(5,3) = 0x38 * Assume 0 <= lowbit <= 31, and 0 <= highbit <= 31 * If lowbit > highbit, then mask should be all 0's ...
* bitCount - returns count of number of 1's in word * Examples: bitCount(5) = 2, bitCount(7) = 3 * Legal ops: ! ~ & ^ | + << >> * Max ops: 40 * Rating: 4 */intbitCount(intx){inta =0x55| (0x55<<8);intb =0x33| (0x33<<8);intc =0x0f| (0x0f<<8);intd ...