| \ High level floating point 14jan94py |
\ High level floating point 14jan94py |
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| \ Copyright (C) 1995,1997,2003,2004,2005,2006,2007 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1997,2003,2004,2005,2006,2007,2009 Free Software Foundation, Inc. |
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| \ This file is part of Gforth. |
\ This file is part of Gforth. |
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| fnegate f~rel |
fnegate f~rel |
| THEN ; |
THEN ; |
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-0e fp@ c@ $80 = [if] 0 [else] 7 [endif] constant fsign-offset |
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: fcopysign ( r1 r2 -- r3 ) \ gforth |
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\G r3 takes its absolute value from r1 and its sign from r2 |
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\ !! implementation relies on IEEE DP format |
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fp@ fsign-offset + dup c@ $80 and >r ( r1 r2 addr-r1sign ) |
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float+ dup c@ $7f and r> or swap c! |
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fdrop ; |
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| \ proposals from Krishna Myeni in <cjsp2d$47l$1@ngspool-d02.news.aol.com> |
\ proposals from Krishna Myeni in <cjsp2d$47l$1@ngspool-d02.news.aol.com> |
| \ not sure if they are a good idea |
\ not sure if they are a good idea |
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| : FTRUNC ( r1 -- r2 ) |
: ftrunc ( r1 -- r2 ) \ X:ftrunc |
| \ round towards 0 |
\ round towards 0 |
| \ !! should be implemented properly |
fdup fabs floor fswap fcopysign ; |
| F>D D>F ; |
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| : FMOD ( r1 r2 -- r ) |
: FMOD ( r1 r2 -- r ) |
| \ remainder of r1/r2 |
\ remainder of r1/r2 |
| FOVER FOVER F/ ftrunc F* F- ; |
FOVER FOVER F/ ftrunc F* F- ; |
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