/* $Id: level0.S,v 1.1.1.1 1999/09/16 13:47:58 karim Exp $ */

/* This file defines some "level 0" kernel functions for SPARC V8 */
/* With gcc, those symbols are inline and defined in level0.h     */
/* overflow hiremainder                                           */
/* addll addllx subll subllx shiftl shiftlr mulll addmul          */

#ifndef __GNUC__
#if defined(NO_UNDERSCORE) || defined(linux)
#  define C(entrypoint) entrypoint
#elif defined(sun) || defined(NeXT)
#  ifdef __STDC__
#    define C(entrypoint) _##entrypoint
#  else
#    define C(entrypoint) _/**/entrypoint
#  endif
#endif
#if defined(sun) || defined(linux)
#  define GLOBL .global
#elif defined(NeXT)
#  define GLOBL .globl
#endif

#if   defined(sun) || defined(linux)
	.seg "text"
#elif defined(NeXT)
.text
	.align 2
#endif
	GLOBL	C(addll),C(subll),C(addllx),C(subllx)
	GLOBL	C(shiftl),C(shiftlr),C(shiftl2),C(shiftlr1),C(shiftlr2)
	GLOBL	C(mulll),C(overflow),C(hiremainder),C(addmul)
	
C(addll): sethi	%hi(C(overflow)),%o3
	addcc	%o0,%o1,%o0
	addx	%g0,%g0,%o2
	retl
	st	%o2,[%o3+%lo(C(overflow))]
C(subll): sethi	%hi(C(overflow)),%o3
	subcc	%o0,%o1,%o0
	addx	%g0,%g0,%o2
	retl
	st	%o2,[%o3+%lo(C(overflow))]
C(addllx): sethi	%hi(C(overflow)),%o3
	ld	[%o3+%lo(C(overflow))],%o2
	subcc	%g0,%o2,%g0
	addxcc	%o0,%o1,%o0
	addx	%g0,%g0,%o2
	retl
	st	%o2,[%o3+%lo(C(overflow))]
C(subllx): sethi	%hi(C(overflow)),%o3
	ld	[%o3+%lo(C(overflow))],%o2
	subcc	%g0,%o2,%g0
	subxcc	%o0,%o1,%o0
	addx	%g0,%g0,%o2
	retl
	st	%o2,[%o3+%lo(C(overflow))]
C(shiftl): sethi	%hi(C(hiremainder)),%o3
	neg	%o1,%o4
	srl	%o0,%o4,%o2
	st	%o2,[%o3+%lo(C(hiremainder))]
	retl
	sll	%o0,%o1,%o0
C(shiftl2): sethi	%hi(C(hiremainder)),%o3
	srl	%o0,%o2,%o4
	st	%o4,[%o3+%lo(C(hiremainder))]
	retl
	sll	%o0,%o1,%o0
C(shiftlr): sethi %hi(C(hiremainder)),%o3
	neg	%o1,%o4
	sll	%o0,%o4,%o2
	st	%o2,[%o3+%lo(C(hiremainder))]
	retl
	srl	%o0,%o1,%o0
C(shiftlr1): sethi %hi(C(hiremainder)),%o3
	sll	%o0,31,%o2
	st	%o2,[%o3+%lo(C(hiremainder))]
	retl
	srl	%o0,1,%o0
C(shiftlr2): sethi %hi(C(hiremainder)),%o3
	sll	%o0,%o2,%o4
	st	%o4,[%o3+%lo(C(hiremainder))]
	retl
	srl	%o0,%o1,%o0
	
C(mulll): umul	%o0,%o1,%o0
	sethi	%hi(C(hiremainder)),%o3
	rd	%y,%o2
	retl
	st	%o2,[%o3+%lo(C(hiremainder))]
	
C(addmul): umul	%o0,%o1,%o0
	sethi	%hi(C(hiremainder)),%o3
	ld	[%o3+%lo(C(hiremainder))],%o2
	rd	%y,%o4
	addcc	%o0,%o2,%o0
	addx	%g0,%o4,%o4
	retl
	st	%o4,[%o3+%lo(C(hiremainder))]
	
#if   defined(sun) || defined(linux)
	.seg	"bss"
	.align	4
C(hiremainder): .skip  4
C(overflow): .skip  4
#elif defined(NeXT)
	.comm C(overflow),8
	.comm C(hiremainder),8
#endif
#endif /* !defined(__GNUC__) */