摘要：
floatQ_rsqrt(floatnumber){longi;floatx2,y;constfloatthreehalfs=1.5F;x2=number*0.5F;y=number;i=*(long*)&y;//evilfloatingpointbitlevelhackingi=0x5f3759df-(i>>1);//whatthefuck?y=*(float*)&i... 阅读全文
posted @ 2007-02-06 12:16
gxc
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