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idle



Joined: 06 Jan 2011
Posts: 360
Location: Ukraine
idle
edit: wrong post

hello
i'm not sure of texts below
but it seems a way to implement f2xm1 on very old cpu
fraction assumed positive value ;tip, 2^-x = 1/2^x
no code prepared though Crying or Very sad
Code:
match multiline comment , {
  fraction         = [0..1)
  2^fraction       = [1..2)
  size of fraction = 64bit
  2^(1+1+..+1) = 2^1*2^1*..*2^1 = ;2*2*..*2 = 1 shl 1 shl 1 .. shl 1
  2 > 2^0.? * 2^0.0? *..* 2^0.00..? >= 1  -hence-> no need to keep exponent
  }



.fractions_fields_of_tbyte_results_by_fpu dq\
$D413CCCFE7799211,\ ;f2xm1(2^0.100b)
$C1BF828C6DC54B7A,\ ;f2xm1(2^0.010b)
$B95C1E3EA8BD6E70,\ ;f2xm1(2^0.001b)
$B5586CF9890F6299,\ ;...
$B361A62B0AE875D0,\
$B268F9DE0183B9BE,\
$B1ED4FD999AB6C25,\
$B1AFA5ABCBED612A,\
$B190DB43813D43FE,\
$B18178BA33B141B5,\
$B179C82028FD0946,\
$B175EFFDC76BA38E,\
$B17403F73F2DAD96,\
$B1730DF6A5247426,\
$B17292F702A3AA23,\
$B17255775C040619,\
$B17236B7935C5DDB,\
$B1722757B1B2935F,\
$B1721FA7C1883070,\
$B1721BCFC99D9F89,\
$B17219E3CDB2FF39,\
$B17218EDCFC0591A,\
$B1721872D0C7B08D,\
$B1721835514B86E7,\
$B1721816918D7CBC,\
$B172180731AE7A51,\
$B17217FF81BEF9C5,\
$B17217FBA9C739AA,\
$B17217F9BDCB59A7,\
$B17217F8C7CD69A9,\
$B17217F84CCE71AA,\
$B17217F80F4EF5AB,\
$B17217F7F08F37AB,\
$B17217F7E12F58AC,\
$B17217F7D97F692C,\
$B17217F7D5A7716C,\
$B17217F7D3BB758C,\
$B17217F7D2C5779C,\
$B17217F7D24A78A4,\
$B17217F7D20CF928,\
$B17217F7D1EE396A,\
$B17217F7D1DED98B,\
$B17217F7D1D7299B,\
$B17217F7D1D351A4,\
$B17217F7D1D165A8,\
$B17217F7D1D06FAA,\
$B17217F7D1CFF4AB,\
$B17217F7D1CFB72B,\
$B17217F7D1CF986C,\
$B17217F7D1CF890C,\
$B17217F7D1CF815C,\
$B17217F7D1CF7D84,\
$B17217F7D1CF7B98,\
$B17217F7D1CF7AA2,\
$B17217F7D1CF7A27,\
$B17217F7D1CF79E9,\
$B17217F7D1CF79CB,\
$B17217F7D1CF79BB,\
$B17217F7D1CF79B3,\
$B17217F7D1CF79B0,\
$B17217F7D1CF79AE,\
$B17217F7D1CF79AD,\
$B17217F7D1CF79AC,\
$B17217F7D1CF79AC
    
Post 20 Jun 2011, 10:44
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