lib1funcs.asm

linux下的gcc编译器

/* Library functions.
   Copyright (C) 2000 Free Software Foundation, Inc.
   Contributed by Red Hat, Inc.
  
   This file is part of GNU CC.
  
   GNU CC is free software ; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation * either version 2, or (at your option)
   any later version.
  
   GNU CC is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY ; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
  
   You should have received a copy of the GNU General Public License
   along with GNU CC; see the file COPYING.  If not, write to
   the Free Software Foundation, 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <frv-asm.h>


#ifdef L_cmpll
/* icc0 = __cmpll (long long a, long long b)  */

	.file	"_cmpll.s"
	.globl	EXT(__cmpll)
	.type	EXT(__cmpll),@function
	.text
	.p2align 4
EXT(__cmpll):
	cmp	gr8, gr10, icc0
	ckeq	icc0, cc4
	P(ccmp)	gr9, gr11, cc4, 1
	ret
.Lend:
	.size	EXT(__cmpll),.Lend-EXT(__cmpll)
#endif /* L_cmpll */

#ifdef L_cmpf
/* icc0 = __cmpf (float a, float b) */
/* Note, because this function returns the result in ICC0, it means it can't
   handle NaNs.  */

	.file	"_cmpf.s"
	.globl	EXT(__cmpf)
	.type	EXT(__cmpf),@function
	.text
	.p2align 4
EXT(__cmpf):
#ifdef __FRV_HARD_FLOAT__	/* floating point instructions available */
	movgf	gr8, fr0
	P(movgf) gr9, fr1
	setlos	#1, gr8
	fcmps	fr0, fr1, fcc0
	P(fcklt) fcc0, cc0
	fckeq	fcc0, cc1
	csub	gr0, gr8, gr8, cc0, 1
	cmov	gr0, gr8, cc1, 1
	cmpi	gr8, 0, icc0
	ret
#else				/* no floating point instructions available */
	movsg	lr, gr4
	addi	sp, #-16, sp
	sti	gr4, @(sp, 8)
	st	fp, @(sp, gr0)
	mov	sp, fp
	call	EXT(__cmpsf2)
	cmpi	gr8, #0, icc0
	ldi	@(sp, 8), gr4
	movgs	gr4, lr
	ld	@(sp,gr0), fp
	addi	sp, #16, sp
	ret
#endif
.Lend:
	.size	EXT(__cmpf),.Lend-EXT(__cmpf)
#endif

#ifdef L_cmpd
/* icc0 = __cmpd (double a, double b) */
/* Note, because this function returns the result in ICC0, it means it can't
   handle NaNs.  */

	.file	"_cmpd.s"
	.globl	EXT(__cmpd)
	.type	EXT(__cmpd),@function
	.text
	.p2align 4
EXT(__cmpd):
	movsg	lr, gr4
	addi	sp, #-16, sp
	sti	gr4, @(sp, 8)
	st	fp, @(sp, gr0)
	mov	sp, fp
	call	EXT(__cmpdf2)
	cmpi	gr8, #0, icc0
	ldi	@(sp, 8), gr4
	movgs	gr4, lr
	ld	@(sp,gr0), fp
	addi	sp, #16, sp
	ret
.Lend:
	.size	EXT(__cmpd),.Lend-EXT(__cmpd)
#endif

#ifdef L_addll
/* gr8,gr9 = __addll (long long a, long long b) */
/* Note, gcc will never call this function, but it is present in case an
   ABI program calls it.  */

	.file	"_addll.s"
	.globl	EXT(__addll)
	.type	EXT(__addll),@function
	.text
	.p2align
EXT(__addll):
	addcc	gr9, gr11, gr9, icc0
	addx	gr8, gr10, gr8, icc0
	ret
.Lend:
	.size	EXT(__addll),.Lend-EXT(__addll)
#endif

#ifdef L_subll
/* gr8,gr9 = __subll (long long a, long long b) */
/* Note, gcc will never call this function, but it is present in case an
   ABI program calls it.  */

	.file	"_subll.s"
	.globl	EXT(__subll)
	.type	EXT(__subll),@function
	.text
	.p2align 4
EXT(__subll):
	subcc	gr9, gr11, gr9, icc0
	subx	gr8, gr10, gr8, icc0
	ret
.Lend:
	.size	EXT(__subll),.Lend-EXT(__subll)
#endif

#ifdef L_andll
/* gr8,gr9 = __andll (long long a, long long b) */
/* Note, gcc will never call this function, but it is present in case an
   ABI program calls it.  */

	.file	"_andll.s"
	.globl	EXT(__andll)
	.type	EXT(__andll),@function
	.text
	.p2align 4
EXT(__andll):
	P(and)	gr9, gr11, gr9
	P2(and)	gr8, gr10, gr8
	ret
.Lend:
	.size	EXT(__andll),.Lend-EXT(__andll)
#endif

#ifdef L_orll
/* gr8,gr9 = __orll (long long a, long long b) */
/* Note, gcc will never call this function, but it is present in case an
   ABI program calls it.  */

	.file	"_orll.s"
	.globl	EXT(__orll)
	.type	EXT(__orll),@function
	.text
	.p2align 4
EXT(__orll):
	P(or)	gr9, gr11, gr9
	P2(or)	gr8, gr10, gr8
	ret
.Lend:
	.size	EXT(__orll),.Lend-EXT(__orll)
#endif

#ifdef L_xorll
/* gr8,gr9 = __xorll (long long a, long long b) */
/* Note, gcc will never call this function, but it is present in case an
   ABI program calls it.  */

	.file	"_xorll.s"
	.globl	EXT(__xorll)
	.type	EXT(__xorll),@function
	.text
	.p2align 4
EXT(__xorll):
	P(xor)	gr9, gr11, gr9
	P2(xor)	gr8, gr10, gr8
	ret
.Lend:
	.size	EXT(__xorll),.Lend-EXT(__xorll)
#endif

#ifdef L_notll
/* gr8,gr9 = __notll (long long a) */
/* Note, gcc will never call this function, but it is present in case an
   ABI program calls it.  */

	.file	"_notll.s"
	.globl	EXT(__notll)
	.type	EXT(__notll),@function
	.text
	.p2align 4
EXT(__notll):
	P(not)	gr9, gr9
	P2(not)	gr8, gr8
	ret
.Lend:
	.size	EXT(__notll),.Lend-EXT(__notll)
#endif

#ifdef L_cmov
/* (void) __cmov (char *dest, const char *src, size_t len) */
/*
 * void __cmov (char *dest, const char *src, size_t len)
 * {
 *   size_t i;
 * 
 *   if (dest < src || dest > src+len)
 *     {
 *	 for (i = 0; i < len; i++)
 *	 dest[i] = src[i];
 *     }
 *   else
 *     {
 *	 while (len-- > 0)
 *	 dest[len] = src[len];
 *     }
 * }
 */

	.file	"_cmov.s"
	.globl	EXT(__cmov)
	.type	EXT(__cmov),@function
	.text
	.p2align 4
EXT(__cmov):
	P(cmp)	gr8, gr9, icc0
	add	gr9, gr10, gr4
	P(cmp)	gr8, gr4, icc1
	bc	icc0, 0, .Lfwd
	bls	icc1, 0, .Lback
.Lfwd:
	/* move bytes in a forward direction */
	P(setlos) #0, gr5
	cmp	gr0, gr10, icc0
	P(subi)	gr9, #1, gr9
	P2(subi) gr8, #1, gr8
	bnc	icc0, 0, .Lret
.Lfloop:
	/* forward byte move loop */
	addi	gr5, #1, gr5
	P(ldsb)	@(gr9, gr5), gr4
	cmp	gr5, gr10, icc0
	P(stb)	gr4, @(gr8, gr5)
	bc	icc0, 0, .Lfloop
	ret
.Lbloop:
	/* backward byte move loop body */
	ldsb	@(gr9,gr10),gr4
	stb	gr4,@(gr8,gr10)
.Lback:
	P(cmpi)	gr10, #0, icc0
	addi	gr10, #-1, gr10
	bne	icc0, 0, .Lbloop
.Lret:
	ret
.Lend:
	.size	 EXT(__cmov),.Lend-EXT(__cmov)
#endif