lib1funcs.asm

gcc编译工具没有什么特别

/* Copyright (C) 1994, 1995, 1997, 1998 Free Software Foundation, Inc.

This file 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.

In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
compiled version of this file with other programs, and to distribute
those programs without any restriction coming from the use of this
file.  (The General Public License restrictions do apply in other
respects; for example, they cover modification of the file, and
distribution when not linked into another program.)

This file 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 this program; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* As a special exception, if you link this library with other files,
   some of which are compiled with GCC, to produce an executable,
   this library does not by itself cause the resulting executable
   to be covered by the GNU General Public License.
   This exception does not however invalidate any other reasons why
   the executable file might be covered by the GNU General Public License.  */


!! libgcc1 routines for the Hitachi SH cpu.
!! Contributed by Steve Chamberlain.
!! [e-mail]

!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
!! recoded in assembly by Toshiyasu Morita
!! [e-mail]

/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
   ELF local label prefixes by J"orn Rennecke
   [e-mail]  */

#ifdef __ELF__
#define LOCAL(X) .L_##X
#else
#define LOCAL(X) L_##X
#endif

#ifdef L_ashiftrt
	.global	___ashiftrt_r4_0
	.global	___ashiftrt_r4_1
	.global	___ashiftrt_r4_2
	.global	___ashiftrt_r4_3
	.global	___ashiftrt_r4_4
	.global	___ashiftrt_r4_5
	.global	___ashiftrt_r4_6
	.global	___ashiftrt_r4_7
	.global	___ashiftrt_r4_8
	.global	___ashiftrt_r4_9
	.global	___ashiftrt_r4_10
	.global	___ashiftrt_r4_11
	.global	___ashiftrt_r4_12
	.global	___ashiftrt_r4_13
	.global	___ashiftrt_r4_14
	.global	___ashiftrt_r4_15
	.global	___ashiftrt_r4_16
	.global	___ashiftrt_r4_17
	.global	___ashiftrt_r4_18
	.global	___ashiftrt_r4_19
	.global	___ashiftrt_r4_20
	.global	___ashiftrt_r4_21
	.global	___ashiftrt_r4_22
	.global	___ashiftrt_r4_23
	.global	___ashiftrt_r4_24
	.global	___ashiftrt_r4_25
	.global	___ashiftrt_r4_26
	.global	___ashiftrt_r4_27
	.global	___ashiftrt_r4_28
	.global	___ashiftrt_r4_29
	.global	___ashiftrt_r4_30
	.global	___ashiftrt_r4_31
	.global	___ashiftrt_r4_32

	.align	1
___ashiftrt_r4_32:
___ashiftrt_r4_31:
	rotcl	r4
	rts
	subc	r4,r4

___ashiftrt_r4_30:
	shar	r4
___ashiftrt_r4_29:
	shar	r4
___ashiftrt_r4_28:
	shar	r4
___ashiftrt_r4_27:
	shar	r4
___ashiftrt_r4_26:
	shar	r4
___ashiftrt_r4_25:
	shar	r4
___ashiftrt_r4_24:
	shlr16	r4
	shlr8	r4
	rts
	exts.b	r4,r4

___ashiftrt_r4_23:
	shar	r4
___ashiftrt_r4_22:
	shar	r4
___ashiftrt_r4_21:
	shar	r4
___ashiftrt_r4_20:
	shar	r4
___ashiftrt_r4_19:
	shar	r4
___ashiftrt_r4_18:
	shar	r4
___ashiftrt_r4_17:
	shar	r4
___ashiftrt_r4_16:
	shlr16	r4
	rts
	exts.w	r4,r4

___ashiftrt_r4_15:
	shar	r4
___ashiftrt_r4_14:
	shar	r4
___ashiftrt_r4_13:
	shar	r4
___ashiftrt_r4_12:
	shar	r4
___ashiftrt_r4_11:
	shar	r4
___ashiftrt_r4_10:
	shar	r4
___ashiftrt_r4_9:
	shar	r4
___ashiftrt_r4_8:
	shar	r4
___ashiftrt_r4_7:
	shar	r4
___ashiftrt_r4_6:
	shar	r4
___ashiftrt_r4_5:
	shar	r4
___ashiftrt_r4_4:
	shar	r4
___ashiftrt_r4_3:
	shar	r4
___ashiftrt_r4_2:
	shar	r4
___ashiftrt_r4_1:
	rts
	shar	r4

___ashiftrt_r4_0:
	rts
	nop
#endif

#ifdef L_ashiftrt_n

!
! ___ashrsi3
!
! Entry:
!
! r4: Value to shift
! r5: Shifts
!
! Exit:
!
! r0: Result
!
! Destroys:
!
! (none)
!

	.global	___ashrsi3
	.align	2
___ashrsi3:
	mov	#31,r0
	and	r0,r5
	mova	LOCAL(ashrsi3_table),r0
	mov.b	@(r0,r5),r5
#ifdef __sh1__
	add	r5,r0
	jmp	@r0
#else
	braf	r5
#endif
	mov	r4,r0

	.align	2
LOCAL(ashrsi3_table):
	.byte		LOCAL(ashrsi3_0)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_1)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_2)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_3)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_4)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_5)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_6)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_7)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_8)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_9)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_10)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_11)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_12)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_13)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_14)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_15)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_16)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_17)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_18)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_19)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_20)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_21)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_22)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_23)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_24)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_25)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_26)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_27)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_28)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_29)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_30)-LOCAL(ashrsi3_table)
	.byte		LOCAL(ashrsi3_31)-LOCAL(ashrsi3_table)

LOCAL(ashrsi3_31):
	rotcl	r0
	rts
	subc	r0,r0

LOCAL(ashrsi3_30):
	shar	r0
LOCAL(ashrsi3_29):
	shar	r0
LOCAL(ashrsi3_28):
	shar	r0
LOCAL(ashrsi3_27):
	shar	r0
LOCAL(ashrsi3_26):
	shar	r0
LOCAL(ashrsi3_25):
	shar	r0
LOCAL(ashrsi3_24):
	shlr16	r0
	shlr8	r0
	rts
	exts.b	r0,r0

LOCAL(ashrsi3_23):
	shar	r0
LOCAL(ashrsi3_22):
	shar	r0
LOCAL(ashrsi3_21):
	shar	r0
LOCAL(ashrsi3_20):
	shar	r0
LOCAL(ashrsi3_19):
	shar	r0
LOCAL(ashrsi3_18):
	shar	r0
LOCAL(ashrsi3_17):
	shar	r0
LOCAL(ashrsi3_16):
	shlr16	r0
	rts
	exts.w	r0,r0

LOCAL(ashrsi3_15):
	shar	r0
LOCAL(ashrsi3_14):
	shar	r0
LOCAL(ashrsi3_13):
	shar	r0
LOCAL(ashrsi3_12):
	shar	r0
LOCAL(ashrsi3_11):
	shar	r0
LOCAL(ashrsi3_10):
	shar	r0
LOCAL(ashrsi3_9):
	shar	r0
LOCAL(ashrsi3_8):
	shar	r0
LOCAL(ashrsi3_7):
	shar	r0
LOCAL(ashrsi3_6):
	shar	r0
LOCAL(ashrsi3_5):
	shar	r0
LOCAL(ashrsi3_4):
	shar	r0
LOCAL(ashrsi3_3):
	shar	r0
LOCAL(ashrsi3_2):
	shar	r0
LOCAL(ashrsi3_1):
	rts
	shar	r0

LOCAL(ashrsi3_0):
	rts
	nop

#endif

#ifdef L_ashiftlt

!
! ___ashlsi3
!
! Entry:
!
! r4: Value to shift
! r5: Shifts
!
! Exit:
!
! r0: Result
!
! Destroys:
!
! (none)
!
	.global	___ashlsi3
	.align	2
___ashlsi3:
	mov	#31,r0
	and	r0,r5
	mova	LOCAL(ashlsi3_table),r0
	mov.b	@(r0,r5),r5
#ifdef __sh1__
	add	r5,r0
	jmp	@r0
#else
	braf	r5
#endif
	mov	r4,r0

	.align	2
LOCAL(ashlsi3_table):
	.byte		LOCAL(ashlsi3_0)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_1)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_2)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_3)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_4)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_5)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_6)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_7)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_8)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_9)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_10)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_11)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_12)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_13)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_14)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_15)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_16)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_17)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_18)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_19)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_20)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_21)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_22)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_23)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_24)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_25)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_26)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_27)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_28)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_29)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_30)-LOCAL(ashlsi3_table)
	.byte		LOCAL(ashlsi3_31)-LOCAL(ashlsi3_table)

LOCAL(ashlsi3_6):
	shll2	r0
LOCAL(ashlsi3_4):
	shll2	r0
LOCAL(ashlsi3_2):
	rts
	shll2	r0

LOCAL(ashlsi3_7):
	shll2	r0
LOCAL(ashlsi3_5):
	shll2	r0
LOCAL(ashlsi3_3):
	shll2	r0
LOCAL(ashlsi3_1):
	rts
	shll	r0

LOCAL(ashlsi3_14):
	shll2	r0
LOCAL(ashlsi3_12):
	shll2	r0
LOCAL(ashlsi3_10):
	shll2	r0
LOCAL(ashlsi3_8):
	rts
	shll8	r0

LOCAL(ashlsi3_15):
	shll2	r0
LOCAL(ashlsi3_13):
	shll2	r0
LOCAL(ashlsi3_11):
	shll2	r0
LOCAL(ashlsi3_9):
	shll8	r0
	rts
	shll	r0

LOCAL(ashlsi3_22):
	shll2	r0
LOCAL(ashlsi3_20):
	shll2	r0
LOCAL(ashlsi3_18):
	shll2	r0
LOCAL(ashlsi3_16):
	rts
	shll16	r0

LOCAL(ashlsi3_23):
	shll2	r0
LOCAL(ashlsi3_21):
	shll2	r0
LOCAL(ashlsi3_19):
	shll2	r0
LOCAL(ashlsi3_17):
	shll16	r0
	rts
	shll	r0

LOCAL(ashlsi3_30):
	shll2	r0
LOCAL(ashlsi3_28):
	shll2	r0
LOCAL(ashlsi3_26):
	shll2	r0
LOCAL(ashlsi3_24):
	shll16	r0
	rts
	shll8	r0

LOCAL(ashlsi3_31):
	shll2	r0
LOCAL(ashlsi3_29):
	shll2	r0
LOCAL(ashlsi3_27):
	shll2	r0
LOCAL(ashlsi3_25):
	shll16	r0
	shll8	r0
	rts
	shll	r0

LOCAL(ashlsi3_0):
	rts
	nop

#endif

#ifdef L_lshiftrt

!
! ___lshrsi3
!
! Entry:
!
! r4: Value to shift
! r5: Shifts
!
! Exit:
!
! r0: Result
!
! Destroys:
!
! (none)
!
	.global	___lshrsi3
	.align	2
___lshrsi3:
	mov	#31,r0
	and	r0,r5
	mova	LOCAL(lshrsi3_table),r0
	mov.b	@(r0,r5),r5
#ifdef __sh1__
	add	r5,r0
	jmp	@r0
#else
	braf	r5
#endif
	mov	r4,r0

	.align	2
LOCAL(lshrsi3_table):
	.byte		LOCAL(lshrsi3_0)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_1)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_2)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_3)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_4)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_5)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_6)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_7)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_8)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_9)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_10)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_11)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_12)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_13)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_14)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_15)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_16)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_17)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_18)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_19)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_20)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_21)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_22)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_23)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_24)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_25)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_26)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_27)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_28)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_29)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_30)-LOCAL(lshrsi3_table)
	.byte		LOCAL(lshrsi3_31)-LOCAL(lshrsi3_table)

LOCAL(lshrsi3_6):
	shlr2	r0
LOCAL(lshrsi3_4):
	shlr2	r0
LOCAL(lshrsi3_2):
	rts
	shlr2	r0

LOCAL(lshrsi3_7):
	shlr2	r0
LOCAL(lshrsi3_5):
	shlr2	r0
LOCAL(lshrsi3_3):
	shlr2	r0
LOCAL(lshrsi3_1):
	rts
	shlr	r0

LOCAL(lshrsi3_14):
	shlr2	r0
LOCAL(lshrsi3_12):
	shlr2	r0
LOCAL(lshrsi3_10):
	shlr2	r0
LOCAL(lshrsi3_8):
	rts
	shlr8	r0

LOCAL(lshrsi3_15):
	shlr2	r0
LOCAL(lshrsi3_13):
	shlr2	r0
LOCAL(lshrsi3_11):
	shlr2	r0
LOCAL(lshrsi3_9):
	shlr8	r0
	rts
	shlr	r0

LOCAL(lshrsi3_22):
	shlr2	r0
LOCAL(lshrsi3_20):
	shlr2	r0
LOCAL(lshrsi3_18):
	shlr2	r0
LOCAL(lshrsi3_16):
	rts
	shlr16	r0

LOCAL(lshrsi3_23):
	shlr2	r0
LOCAL(lshrsi3_21):
	shlr2	r0
LOCAL(lshrsi3_19):
	shlr2	r0
LOCAL(lshrsi3_17):
	shlr16	r0
	rts
	shlr	r0

LOCAL(lshrsi3_30):
	shlr2	r0
LOCAL(lshrsi3_28):