56 lines
1.2 KiB
Plaintext
56 lines
1.2 KiB
Plaintext
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hex
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ifnot: lib:ari
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: lib:ari ;
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\ abs ( n1 -- abs_n1 ) absolute value of n1
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ifnot: abs
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: abs _execasm1>1 151 _cnip ;
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\ u*/mod ( u1 u2 u3 -- u4 u5 ) u5 = (u1*u2)/u3, u4 is the
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\ remainder. Uses a 64bit intermediate result.
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ifnot: u*/mod
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: u*/mod rot2 um* rot um/mod ;
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\ u*/ ( u1 u2 u3 -- u4 ) u4 = (u1*u2)/u3 Uses a 64bit
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\ intermediate result.
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ifnot: u*/
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: u*/ rot2 um* rot um/mod nip ;
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\ sign ( n1 n2 -- n3 ) n3 is the xor of the sign bits of
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\ n1 and n2
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ifnot: sign
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: sign xor 80000000 and ;
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\ */mod ( n1 n2 n3 -- n4 n5 ) n5 = (n1*n2)/n3, n4 is the
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\ remainder. Uses a 64bit intermediate result.
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ifnot: */mod
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: */mod 2dup sign >r abs rot dup r> sign >r abs rot abs
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um* rot um/mod r> if negate swap negate swap then ;
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\ */ ( n1 n2 n3 -- n4 ) n4 = (n1*n2)/n3. Uses a 64bit
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\ intermediate result.
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ifnot: */
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: */ */mod nip ;
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\ /mod ( n1 n2 -- n3 n4 ) \ signed divide & mod n4 = n1/n2,
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\ n3 is the remainder
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ifnot: /mod
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: /mod 2dup sign >r abs swap abs swap u/mod r> if negate swap
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negate swap then ;
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\ * ( n1 n2 -- n1*n2) n1 multiplied by n2
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ifnot: *
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: * um* drop ;
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\ / ( n1 n2 -- n1/n2) n1 divided by n2
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ifnot: /
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: / /mod nip ;
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\ rnd ( -- n1 ) n1 is a random number from 00 - FF
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ifnot: rnd
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: rnd cnt COG@ 8 rshift cnt COG@ xor FF and ;
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