File:  [CSRG BSD Unix] / 43BSDReno / sys / tahoemath / Knegd.s
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 16:12:57 2018 UTC (8 years, 1 month ago) by root
Branches: MAIN, BSD
CVS tags: HEAD, BSD43reno
BSD 4.3reno

/*	Knegd.s	1.3	86/01/05	*/

#include "../tahoemath/fp.h"
#include "../tahoemath/Kfp.h"
#include "../tahoe/SYS.h"

	.text
ENTRY(Knegd, 0)
	andl3	$EXPMASK,4(fp),r0	/* check for reserved operand,zero. */
	beql	retzero
	movl	4(fp),r0		/* fetch operand. */
	movl	8(fp),r1
	bbc	$31,r0,seton
	andl2	$(0!SIGNBIT),r0		/* turn it off. */
	ret
seton:	orl2	$SIGNBIT,r0		/* turn it on. */
	ret
retzero:
	clrl	r0
	clrl	r1
	ret

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