ba237a9d91
Files correlati : Ricompilazione Demo : [ ] Commento : Aggiunti i sorgenti per Greenleaf Math Library (gfm.dll) git-svn-id: svn://10.65.10.50/trunk@10079 c028cbd2-c16b-5b4b-a496-9718f37d4682
58 lines
1.1 KiB
C
Executable File
58 lines
1.1 KiB
C
Executable File
/* int _DivDecFast(pDst,pSrc1,pSrc2);
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*
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* ARGUMENT
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* DEC *pDst;
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* DEC *pSrc1,pSrc2;
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*
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* DESCRIPTION
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* Divides pDst = pSrc1 / pSrc2, to 64 bits of accuracy.
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* This code is about 1/3 faster than ddix.
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*
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* SIDE EFFECTS
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* None.
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*
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* RETURNS
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* Returns GM_SUCCESS if successful, otherwise the error code.
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* wGMError is not changed.
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*
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* AUTHOR
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* Jared Levy 05-JAN-1987 17:30
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* Copyright (C) 1987-1990 Greenleaf Software Inc. All rights reserved.
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*
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* MODIFICATIONS
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*
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*/
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#include <stdio.h>
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#include "gm.h"
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#include "gmsystem.h"
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int _DivProcFast();
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int _DivDecFast(pDst,pSrc1,pSrc2)
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DEC *pDst;
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DEC *pSrc1,*pSrc2;
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{
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/* check that pSrc2 is nonzero */
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if (_MacIsDecZ(pSrc2))
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return(GM_DIV0);
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/* check whether scr1 is zero */
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if (_MacIsDecZ(pSrc1)) {
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_MacDCopy(pDst, pSrc1);
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return(GM_SUCCESS);
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}
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if (_DivProcFast(pDst,pSrc1,pSrc2) != GM_SUCCESS)
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return(GM_OVERFLOW);
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/* if quotient is zero, an underflow has occured */
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if (_MacIsDecZ(pDst))
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return(GM_UNDERFLOW);
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/* if the signs of the sources are different, pDst=-pDst */
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pDst->dc.attr=pSrc1->dc.attr^pSrc2->dc.attr;
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return(GM_SUCCESS);
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}
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