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| 1 | /*
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| 2 | (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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| 3 | See the copyright notice in the ACK home directory, in the file "Copyright".
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| 4 | */
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| 5 |
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| 6 | /* $Header: /cvsup/minix/src/lib/float/ngf8.c,v 1.1.1.1 2005/04/21 14:56:11 beng Exp $ */
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| 7 |
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| 8 | /*
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| 9 | NEGATE A FLOATING POINT (NGF 8)
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| 10 | */
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| 11 | /********************************************************/
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| 12 |
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| 13 | #include "FP_types.h"
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| 14 | #include "get_put.h"
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| 15 |
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| 16 | #define OFF ((FL_MSL_AT_LOW_ADDRESS ? 0 : 4) + (FL_MSW_AT_LOW_ADDRESS ? 0 : 2) + (FL_MSB_AT_LOW_ADDRESS ? 0 : 1))
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| 17 |
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| 18 | void
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| 19 | ngf8(f)
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| 20 | DOUBLE f;
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| 21 | {
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| 22 | unsigned char *p;
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| 23 |
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| 24 | if (f.d[0] != 0 || f.d[1] != 0) {
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| 25 | p = (unsigned char *) &f + OFF;
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| 26 | *p ^= 0x80;
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| 27 | }
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| 28 | }
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