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julius |
/* -*- Mode: Asm -*- */
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/* Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
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Contributed by Denis Chertykov
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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This file is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#define __zero_reg__ r1
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#define __tmp_reg__ r0
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#define __SREG__ 0x3f
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#define __SP_H__ 0x3e
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#define __SP_L__ 0x3d
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/* Most of the functions here are called directly from avr.md
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patterns, instead of using the standard libcall mechanisms.
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This can make better code because GCC knows exactly which
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of the call-used registers (not all of them) are clobbered. */
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.section .text.libgcc, "ax", @progbits
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.macro mov_l r_dest, r_src
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#if defined (__AVR_HAVE_MOVW__)
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movw \r_dest, \r_src
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#else
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mov \r_dest, \r_src
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#endif
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.endm
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.macro mov_h r_dest, r_src
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#if defined (__AVR_HAVE_MOVW__)
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; empty
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#else
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mov \r_dest, \r_src
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#endif
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.endm
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/* Note: mulqi3, mulhi3 are open-coded on the enhanced core. */
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#if !defined (__AVR_ENHANCED__)
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/*******************************************************
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Multiplication 8 x 8
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*******************************************************/
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#if defined (L_mulqi3)
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#define r_arg2 r22 /* multiplicand */
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#define r_arg1 r24 /* multiplier */
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#define r_res __tmp_reg__ /* result */
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.global __mulqi3
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.func __mulqi3
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__mulqi3:
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clr r_res ; clear result
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__mulqi3_loop:
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sbrc r_arg1,0
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add r_res,r_arg2
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add r_arg2,r_arg2 ; shift multiplicand
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breq __mulqi3_exit ; while multiplicand != 0
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lsr r_arg1 ;
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brne __mulqi3_loop ; exit if multiplier = 0
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__mulqi3_exit:
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mov r_arg1,r_res ; result to return register
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ret
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#undef r_arg2
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#undef r_arg1
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#undef r_res
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.endfunc
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#endif /* defined (L_mulqi3) */
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#if defined (L_mulqihi3)
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.global __mulqihi3
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.func __mulqihi3
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__mulqihi3:
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clr r25
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sbrc r24, 7
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dec r25
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clr r23
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sbrc r22, 7
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dec r22
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rjmp __mulhi3
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.endfunc
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#endif /* defined (L_mulqihi3) */
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#if defined (L_umulqihi3)
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.global __umulqihi3
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.func __umulqihi3
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__umulqihi3:
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clr r25
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clr r23
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rjmp __mulhi3
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.endfunc
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#endif /* defined (L_umulqihi3) */
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/*******************************************************
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Multiplication 16 x 16
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*******************************************************/
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#if defined (L_mulhi3)
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#define r_arg1L r24 /* multiplier Low */
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#define r_arg1H r25 /* multiplier High */
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#define r_arg2L r22 /* multiplicand Low */
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#define r_arg2H r23 /* multiplicand High */
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#define r_resL __tmp_reg__ /* result Low */
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#define r_resH r21 /* result High */
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.global __mulhi3
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.func __mulhi3
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__mulhi3:
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clr r_resH ; clear result
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clr r_resL ; clear result
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__mulhi3_loop:
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sbrs r_arg1L,0
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rjmp __mulhi3_skip1
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add r_resL,r_arg2L ; result + multiplicand
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adc r_resH,r_arg2H
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__mulhi3_skip1:
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add r_arg2L,r_arg2L ; shift multiplicand
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adc r_arg2H,r_arg2H
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cp r_arg2L,__zero_reg__
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cpc r_arg2H,__zero_reg__
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breq __mulhi3_exit ; while multiplicand != 0
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lsr r_arg1H ; gets LSB of multiplier
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ror r_arg1L
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sbiw r_arg1L,0
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brne __mulhi3_loop ; exit if multiplier = 0
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__mulhi3_exit:
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mov r_arg1H,r_resH ; result to return register
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mov r_arg1L,r_resL
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ret
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#undef r_arg1L
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#undef r_arg1H
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#undef r_arg2L
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#undef r_arg2H
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#undef r_resL
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#undef r_resH
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.endfunc
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#endif /* defined (L_mulhi3) */
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#endif /* !defined (__AVR_ENHANCED__) */
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#if defined (L_mulhisi3)
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.global __mulhisi3
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.func __mulhisi3
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__mulhisi3:
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mov_l r18, r24
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mov_h r19, r25
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clr r24
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sbrc r23, 7
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dec r24
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mov r25, r24
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clr r20
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sbrc r19, 7
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dec r20
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mov r21, r20
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rjmp __mulsi3
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.endfunc
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#endif /* defined (L_mulhisi3) */
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#if defined (L_umulhisi3)
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.global __umulhisi3
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.func __umulhisi3
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__umulhisi3:
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mov_l r18, r24
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mov_h r19, r25
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clr r24
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clr r25
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clr r20
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clr r21
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rjmp __mulsi3
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.endfunc
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#endif /* defined (L_umulhisi3) */
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#if defined (L_mulsi3)
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/*******************************************************
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Multiplication 32 x 32
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*******************************************************/
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#define r_arg1L r22 /* multiplier Low */
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#define r_arg1H r23
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#define r_arg1HL r24
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#define r_arg1HH r25 /* multiplier High */
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#define r_arg2L r18 /* multiplicand Low */
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#define r_arg2H r19
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#define r_arg2HL r20
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#define r_arg2HH r21 /* multiplicand High */
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#define r_resL r26 /* result Low */
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#define r_resH r27
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#define r_resHL r30
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#define r_resHH r31 /* result High */
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.global __mulsi3
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.func __mulsi3
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__mulsi3:
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#if defined (__AVR_ENHANCED__)
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mul r_arg1L, r_arg2L
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movw r_resL, r0
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mul r_arg1H, r_arg2H
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movw r_resHL, r0
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mul r_arg1HL, r_arg2L
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add r_resHL, r0
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adc r_resHH, r1
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mul r_arg1L, r_arg2HL
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add r_resHL, r0
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adc r_resHH, r1
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mul r_arg1HH, r_arg2L
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add r_resHH, r0
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mul r_arg1HL, r_arg2H
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add r_resHH, r0
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mul r_arg1H, r_arg2HL
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add r_resHH, r0
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mul r_arg1L, r_arg2HH
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add r_resHH, r0
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clr r_arg1HH ; use instead of __zero_reg__ to add carry
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mul r_arg1H, r_arg2L
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add r_resH, r0
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adc r_resHL, r1
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adc r_resHH, r_arg1HH ; add carry
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mul r_arg1L, r_arg2H
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add r_resH, r0
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adc r_resHL, r1
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adc r_resHH, r_arg1HH ; add carry
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movw r_arg1L, r_resL
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movw r_arg1HL, r_resHL
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clr r1 ; __zero_reg__ clobbered by "mul"
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ret
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#else
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clr r_resHH ; clear result
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clr r_resHL ; clear result
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clr r_resH ; clear result
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clr r_resL ; clear result
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__mulsi3_loop:
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sbrs r_arg1L,0
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rjmp __mulsi3_skip1
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add r_resL,r_arg2L ; result + multiplicand
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adc r_resH,r_arg2H
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adc r_resHL,r_arg2HL
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adc r_resHH,r_arg2HH
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__mulsi3_skip1:
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add r_arg2L,r_arg2L ; shift multiplicand
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adc r_arg2H,r_arg2H
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adc r_arg2HL,r_arg2HL
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adc r_arg2HH,r_arg2HH
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lsr r_arg1HH ; gets LSB of multiplier
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ror r_arg1HL
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ror r_arg1H
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ror r_arg1L
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brne __mulsi3_loop
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sbiw r_arg1HL,0
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cpc r_arg1H,r_arg1L
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brne __mulsi3_loop ; exit if multiplier = 0
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__mulsi3_exit:
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mov_h r_arg1HH,r_resHH ; result to return register
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mov_l r_arg1HL,r_resHL
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mov_h r_arg1H,r_resH
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mov_l r_arg1L,r_resL
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ret
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#endif /* !defined (__AVR_ENHANCED__) */
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#undef r_arg1L
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#undef r_arg1H
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| 287 |
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#undef r_arg1HL
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| 288 |
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#undef r_arg1HH
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| 289 |
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#undef r_arg2L
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#undef r_arg2H
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| 293 |
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#undef r_arg2HL
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| 294 |
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#undef r_arg2HH
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| 295 |
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| 296 |
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#undef r_resL
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#undef r_resH
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| 298 |
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#undef r_resHL
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| 299 |
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#undef r_resHH
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.endfunc
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#endif /* defined (L_mulsi3) */
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| 303 |
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| 304 |
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/*******************************************************
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| 305 |
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Division 8 / 8 => (result + remainder)
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| 306 |
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*******************************************************/
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| 307 |
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#define r_rem r25 /* remainder */
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| 308 |
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#define r_arg1 r24 /* dividend, quotient */
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| 309 |
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#define r_arg2 r22 /* divisor */
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| 310 |
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#define r_cnt r23 /* loop count */
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| 311 |
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| 312 |
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#if defined (L_udivmodqi4)
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| 313 |
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.global __udivmodqi4
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| 314 |
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.func __udivmodqi4
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| 315 |
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__udivmodqi4:
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| 316 |
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sub r_rem,r_rem ; clear remainder and carry
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| 317 |
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ldi r_cnt,9 ; init loop counter
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| 318 |
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rjmp __udivmodqi4_ep ; jump to entry point
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__udivmodqi4_loop:
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rol r_rem ; shift dividend into remainder
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cp r_rem,r_arg2 ; compare remainder & divisor
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brcs __udivmodqi4_ep ; remainder <= divisor
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sub r_rem,r_arg2 ; restore remainder
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| 324 |
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__udivmodqi4_ep:
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| 325 |
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rol r_arg1 ; shift dividend (with CARRY)
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| 326 |
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dec r_cnt ; decrement loop counter
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| 327 |
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brne __udivmodqi4_loop
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com r_arg1 ; complement result
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; because C flag was complemented in loop
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ret
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| 331 |
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.endfunc
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| 332 |
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#endif /* defined (L_udivmodqi4) */
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| 333 |
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| 334 |
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#if defined (L_divmodqi4)
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| 335 |
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.global __divmodqi4
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| 336 |
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.func __divmodqi4
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| 337 |
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__divmodqi4:
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| 338 |
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bst r_arg1,7 ; store sign of dividend
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| 339 |
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mov __tmp_reg__,r_arg1
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| 340 |
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eor __tmp_reg__,r_arg2; r0.7 is sign of result
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| 341 |
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sbrc r_arg1,7
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| 342 |
|
|
neg r_arg1 ; dividend negative : negate
|
| 343 |
|
|
sbrc r_arg2,7
|
| 344 |
|
|
neg r_arg2 ; divisor negative : negate
|
| 345 |
|
|
rcall __udivmodqi4 ; do the unsigned div/mod
|
| 346 |
|
|
brtc __divmodqi4_1
|
| 347 |
|
|
neg r_rem ; correct remainder sign
|
| 348 |
|
|
__divmodqi4_1:
|
| 349 |
|
|
sbrc __tmp_reg__,7
|
| 350 |
|
|
neg r_arg1 ; correct result sign
|
| 351 |
|
|
__divmodqi4_exit:
|
| 352 |
|
|
ret
|
| 353 |
|
|
.endfunc
|
| 354 |
|
|
#endif /* defined (L_divmodqi4) */
|
| 355 |
|
|
|
| 356 |
|
|
#undef r_rem
|
| 357 |
|
|
#undef r_arg1
|
| 358 |
|
|
#undef r_arg2
|
| 359 |
|
|
#undef r_cnt
|
| 360 |
|
|
|
| 361 |
|
|
|
| 362 |
|
|
/*******************************************************
|
| 363 |
|
|
Division 16 / 16 => (result + remainder)
|
| 364 |
|
|
*******************************************************/
|
| 365 |
|
|
#define r_remL r26 /* remainder Low */
|
| 366 |
|
|
#define r_remH r27 /* remainder High */
|
| 367 |
|
|
|
| 368 |
|
|
/* return: remainder */
|
| 369 |
|
|
#define r_arg1L r24 /* dividend Low */
|
| 370 |
|
|
#define r_arg1H r25 /* dividend High */
|
| 371 |
|
|
|
| 372 |
|
|
/* return: quotient */
|
| 373 |
|
|
#define r_arg2L r22 /* divisor Low */
|
| 374 |
|
|
#define r_arg2H r23 /* divisor High */
|
| 375 |
|
|
|
| 376 |
|
|
#define r_cnt r21 /* loop count */
|
| 377 |
|
|
|
| 378 |
|
|
#if defined (L_udivmodhi4)
|
| 379 |
|
|
.global __udivmodhi4
|
| 380 |
|
|
.func __udivmodhi4
|
| 381 |
|
|
__udivmodhi4:
|
| 382 |
|
|
sub r_remL,r_remL
|
| 383 |
|
|
sub r_remH,r_remH ; clear remainder and carry
|
| 384 |
|
|
ldi r_cnt,17 ; init loop counter
|
| 385 |
|
|
rjmp __udivmodhi4_ep ; jump to entry point
|
| 386 |
|
|
__udivmodhi4_loop:
|
| 387 |
|
|
rol r_remL ; shift dividend into remainder
|
| 388 |
|
|
rol r_remH
|
| 389 |
|
|
cp r_remL,r_arg2L ; compare remainder & divisor
|
| 390 |
|
|
cpc r_remH,r_arg2H
|
| 391 |
|
|
brcs __udivmodhi4_ep ; remainder < divisor
|
| 392 |
|
|
sub r_remL,r_arg2L ; restore remainder
|
| 393 |
|
|
sbc r_remH,r_arg2H
|
| 394 |
|
|
__udivmodhi4_ep:
|
| 395 |
|
|
rol r_arg1L ; shift dividend (with CARRY)
|
| 396 |
|
|
rol r_arg1H
|
| 397 |
|
|
dec r_cnt ; decrement loop counter
|
| 398 |
|
|
brne __udivmodhi4_loop
|
| 399 |
|
|
com r_arg1L
|
| 400 |
|
|
com r_arg1H
|
| 401 |
|
|
; div/mod results to return registers, as for the div() function
|
| 402 |
|
|
mov_l r_arg2L, r_arg1L ; quotient
|
| 403 |
|
|
mov_h r_arg2H, r_arg1H
|
| 404 |
|
|
mov_l r_arg1L, r_remL ; remainder
|
| 405 |
|
|
mov_h r_arg1H, r_remH
|
| 406 |
|
|
ret
|
| 407 |
|
|
.endfunc
|
| 408 |
|
|
#endif /* defined (L_udivmodhi4) */
|
| 409 |
|
|
|
| 410 |
|
|
#if defined (L_divmodhi4)
|
| 411 |
|
|
.global __divmodhi4
|
| 412 |
|
|
.func __divmodhi4
|
| 413 |
|
|
__divmodhi4:
|
| 414 |
|
|
.global _div
|
| 415 |
|
|
_div:
|
| 416 |
|
|
bst r_arg1H,7 ; store sign of dividend
|
| 417 |
|
|
mov __tmp_reg__,r_arg1H
|
| 418 |
|
|
eor __tmp_reg__,r_arg2H ; r0.7 is sign of result
|
| 419 |
|
|
rcall __divmodhi4_neg1 ; dividend negative : negate
|
| 420 |
|
|
sbrc r_arg2H,7
|
| 421 |
|
|
rcall __divmodhi4_neg2 ; divisor negative : negate
|
| 422 |
|
|
rcall __udivmodhi4 ; do the unsigned div/mod
|
| 423 |
|
|
rcall __divmodhi4_neg1 ; correct remainder sign
|
| 424 |
|
|
tst __tmp_reg__
|
| 425 |
|
|
brpl __divmodhi4_exit
|
| 426 |
|
|
__divmodhi4_neg2:
|
| 427 |
|
|
com r_arg2H
|
| 428 |
|
|
neg r_arg2L ; correct divisor/result sign
|
| 429 |
|
|
sbci r_arg2H,0xff
|
| 430 |
|
|
__divmodhi4_exit:
|
| 431 |
|
|
ret
|
| 432 |
|
|
__divmodhi4_neg1:
|
| 433 |
|
|
brtc __divmodhi4_exit
|
| 434 |
|
|
com r_arg1H
|
| 435 |
|
|
neg r_arg1L ; correct dividend/remainder sign
|
| 436 |
|
|
sbci r_arg1H,0xff
|
| 437 |
|
|
ret
|
| 438 |
|
|
.endfunc
|
| 439 |
|
|
#endif /* defined (L_divmodhi4) */
|
| 440 |
|
|
|
| 441 |
|
|
#undef r_remH
|
| 442 |
|
|
#undef r_remL
|
| 443 |
|
|
|
| 444 |
|
|
#undef r_arg1H
|
| 445 |
|
|
#undef r_arg1L
|
| 446 |
|
|
|
| 447 |
|
|
#undef r_arg2H
|
| 448 |
|
|
#undef r_arg2L
|
| 449 |
|
|
|
| 450 |
|
|
#undef r_cnt
|
| 451 |
|
|
|
| 452 |
|
|
/*******************************************************
|
| 453 |
|
|
Division 32 / 32 => (result + remainder)
|
| 454 |
|
|
*******************************************************/
|
| 455 |
|
|
#define r_remHH r31 /* remainder High */
|
| 456 |
|
|
#define r_remHL r30
|
| 457 |
|
|
#define r_remH r27
|
| 458 |
|
|
#define r_remL r26 /* remainder Low */
|
| 459 |
|
|
|
| 460 |
|
|
/* return: remainder */
|
| 461 |
|
|
#define r_arg1HH r25 /* dividend High */
|
| 462 |
|
|
#define r_arg1HL r24
|
| 463 |
|
|
#define r_arg1H r23
|
| 464 |
|
|
#define r_arg1L r22 /* dividend Low */
|
| 465 |
|
|
|
| 466 |
|
|
/* return: quotient */
|
| 467 |
|
|
#define r_arg2HH r21 /* divisor High */
|
| 468 |
|
|
#define r_arg2HL r20
|
| 469 |
|
|
#define r_arg2H r19
|
| 470 |
|
|
#define r_arg2L r18 /* divisor Low */
|
| 471 |
|
|
|
| 472 |
|
|
#define r_cnt __zero_reg__ /* loop count (0 after the loop!) */
|
| 473 |
|
|
|
| 474 |
|
|
#if defined (L_udivmodsi4)
|
| 475 |
|
|
.global __udivmodsi4
|
| 476 |
|
|
.func __udivmodsi4
|
| 477 |
|
|
__udivmodsi4:
|
| 478 |
|
|
ldi r_remL, 33 ; init loop counter
|
| 479 |
|
|
mov r_cnt, r_remL
|
| 480 |
|
|
sub r_remL,r_remL
|
| 481 |
|
|
sub r_remH,r_remH ; clear remainder and carry
|
| 482 |
|
|
mov_l r_remHL, r_remL
|
| 483 |
|
|
mov_h r_remHH, r_remH
|
| 484 |
|
|
rjmp __udivmodsi4_ep ; jump to entry point
|
| 485 |
|
|
__udivmodsi4_loop:
|
| 486 |
|
|
rol r_remL ; shift dividend into remainder
|
| 487 |
|
|
rol r_remH
|
| 488 |
|
|
rol r_remHL
|
| 489 |
|
|
rol r_remHH
|
| 490 |
|
|
cp r_remL,r_arg2L ; compare remainder & divisor
|
| 491 |
|
|
cpc r_remH,r_arg2H
|
| 492 |
|
|
cpc r_remHL,r_arg2HL
|
| 493 |
|
|
cpc r_remHH,r_arg2HH
|
| 494 |
|
|
brcs __udivmodsi4_ep ; remainder <= divisor
|
| 495 |
|
|
sub r_remL,r_arg2L ; restore remainder
|
| 496 |
|
|
sbc r_remH,r_arg2H
|
| 497 |
|
|
sbc r_remHL,r_arg2HL
|
| 498 |
|
|
sbc r_remHH,r_arg2HH
|
| 499 |
|
|
__udivmodsi4_ep:
|
| 500 |
|
|
rol r_arg1L ; shift dividend (with CARRY)
|
| 501 |
|
|
rol r_arg1H
|
| 502 |
|
|
rol r_arg1HL
|
| 503 |
|
|
rol r_arg1HH
|
| 504 |
|
|
dec r_cnt ; decrement loop counter
|
| 505 |
|
|
brne __udivmodsi4_loop
|
| 506 |
|
|
; __zero_reg__ now restored (r_cnt == 0)
|
| 507 |
|
|
com r_arg1L
|
| 508 |
|
|
com r_arg1H
|
| 509 |
|
|
com r_arg1HL
|
| 510 |
|
|
com r_arg1HH
|
| 511 |
|
|
; div/mod results to return registers, as for the ldiv() function
|
| 512 |
|
|
mov_l r_arg2L, r_arg1L ; quotient
|
| 513 |
|
|
mov_h r_arg2H, r_arg1H
|
| 514 |
|
|
mov_l r_arg2HL, r_arg1HL
|
| 515 |
|
|
mov_h r_arg2HH, r_arg1HH
|
| 516 |
|
|
mov_l r_arg1L, r_remL ; remainder
|
| 517 |
|
|
mov_h r_arg1H, r_remH
|
| 518 |
|
|
mov_l r_arg1HL, r_remHL
|
| 519 |
|
|
mov_h r_arg1HH, r_remHH
|
| 520 |
|
|
ret
|
| 521 |
|
|
.endfunc
|
| 522 |
|
|
#endif /* defined (L_udivmodsi4) */
|
| 523 |
|
|
|
| 524 |
|
|
#if defined (L_divmodsi4)
|
| 525 |
|
|
.global __divmodsi4
|
| 526 |
|
|
.func __divmodsi4
|
| 527 |
|
|
__divmodsi4:
|
| 528 |
|
|
bst r_arg1HH,7 ; store sign of dividend
|
| 529 |
|
|
mov __tmp_reg__,r_arg1HH
|
| 530 |
|
|
eor __tmp_reg__,r_arg2HH ; r0.7 is sign of result
|
| 531 |
|
|
rcall __divmodsi4_neg1 ; dividend negative : negate
|
| 532 |
|
|
sbrc r_arg2HH,7
|
| 533 |
|
|
rcall __divmodsi4_neg2 ; divisor negative : negate
|
| 534 |
|
|
rcall __udivmodsi4 ; do the unsigned div/mod
|
| 535 |
|
|
rcall __divmodsi4_neg1 ; correct remainder sign
|
| 536 |
|
|
rol __tmp_reg__
|
| 537 |
|
|
brcc __divmodsi4_exit
|
| 538 |
|
|
__divmodsi4_neg2:
|
| 539 |
|
|
com r_arg2HH
|
| 540 |
|
|
com r_arg2HL
|
| 541 |
|
|
com r_arg2H
|
| 542 |
|
|
neg r_arg2L ; correct divisor/quotient sign
|
| 543 |
|
|
sbci r_arg2H,0xff
|
| 544 |
|
|
sbci r_arg2HL,0xff
|
| 545 |
|
|
sbci r_arg2HH,0xff
|
| 546 |
|
|
__divmodsi4_exit:
|
| 547 |
|
|
ret
|
| 548 |
|
|
__divmodsi4_neg1:
|
| 549 |
|
|
brtc __divmodsi4_exit
|
| 550 |
|
|
com r_arg1HH
|
| 551 |
|
|
com r_arg1HL
|
| 552 |
|
|
com r_arg1H
|
| 553 |
|
|
neg r_arg1L ; correct dividend/remainder sign
|
| 554 |
|
|
sbci r_arg1H, 0xff
|
| 555 |
|
|
sbci r_arg1HL,0xff
|
| 556 |
|
|
sbci r_arg1HH,0xff
|
| 557 |
|
|
ret
|
| 558 |
|
|
.endfunc
|
| 559 |
|
|
#endif /* defined (L_divmodsi4) */
|
| 560 |
|
|
|
| 561 |
|
|
/**********************************
|
| 562 |
|
|
* This is a prologue subroutine
|
| 563 |
|
|
**********************************/
|
| 564 |
|
|
#if defined (L_prologue)
|
| 565 |
|
|
|
| 566 |
|
|
.global __prologue_saves__
|
| 567 |
|
|
.func __prologue_saves__
|
| 568 |
|
|
__prologue_saves__:
|
| 569 |
|
|
push r2
|
| 570 |
|
|
push r3
|
| 571 |
|
|
push r4
|
| 572 |
|
|
push r5
|
| 573 |
|
|
push r6
|
| 574 |
|
|
push r7
|
| 575 |
|
|
push r8
|
| 576 |
|
|
push r9
|
| 577 |
|
|
push r10
|
| 578 |
|
|
push r11
|
| 579 |
|
|
push r12
|
| 580 |
|
|
push r13
|
| 581 |
|
|
push r14
|
| 582 |
|
|
push r15
|
| 583 |
|
|
push r16
|
| 584 |
|
|
push r17
|
| 585 |
|
|
push r28
|
| 586 |
|
|
push r29
|
| 587 |
|
|
in r28,__SP_L__
|
| 588 |
|
|
in r29,__SP_H__
|
| 589 |
|
|
sub r28,r26
|
| 590 |
|
|
sbc r29,r27
|
| 591 |
|
|
in __tmp_reg__,__SREG__
|
| 592 |
|
|
cli
|
| 593 |
|
|
out __SP_H__,r29
|
| 594 |
|
|
out __SREG__,__tmp_reg__
|
| 595 |
|
|
out __SP_L__,r28
|
| 596 |
|
|
ijmp
|
| 597 |
|
|
.endfunc
|
| 598 |
|
|
#endif /* defined (L_prologue) */
|
| 599 |
|
|
|
| 600 |
|
|
/*
|
| 601 |
|
|
* This is an epilogue subroutine
|
| 602 |
|
|
*/
|
| 603 |
|
|
#if defined (L_epilogue)
|
| 604 |
|
|
|
| 605 |
|
|
.global __epilogue_restores__
|
| 606 |
|
|
.func __epilogue_restores__
|
| 607 |
|
|
__epilogue_restores__:
|
| 608 |
|
|
ldd r2,Y+18
|
| 609 |
|
|
ldd r3,Y+17
|
| 610 |
|
|
ldd r4,Y+16
|
| 611 |
|
|
ldd r5,Y+15
|
| 612 |
|
|
ldd r6,Y+14
|
| 613 |
|
|
ldd r7,Y+13
|
| 614 |
|
|
ldd r8,Y+12
|
| 615 |
|
|
ldd r9,Y+11
|
| 616 |
|
|
ldd r10,Y+10
|
| 617 |
|
|
ldd r11,Y+9
|
| 618 |
|
|
ldd r12,Y+8
|
| 619 |
|
|
ldd r13,Y+7
|
| 620 |
|
|
ldd r14,Y+6
|
| 621 |
|
|
ldd r15,Y+5
|
| 622 |
|
|
ldd r16,Y+4
|
| 623 |
|
|
ldd r17,Y+3
|
| 624 |
|
|
ldd r26,Y+2
|
| 625 |
|
|
ldd r27,Y+1
|
| 626 |
|
|
add r28,r30
|
| 627 |
|
|
adc r29,__zero_reg__
|
| 628 |
|
|
in __tmp_reg__,__SREG__
|
| 629 |
|
|
cli
|
| 630 |
|
|
out __SP_H__,r29
|
| 631 |
|
|
out __SREG__,__tmp_reg__
|
| 632 |
|
|
out __SP_L__,r28
|
| 633 |
|
|
mov_l r28, r26
|
| 634 |
|
|
mov_h r29, r27
|
| 635 |
|
|
ret
|
| 636 |
|
|
.endfunc
|
| 637 |
|
|
#endif /* defined (L_epilogue) */
|
| 638 |
|
|
|
| 639 |
|
|
#ifdef L_exit
|
| 640 |
|
|
.section .fini9,"ax",@progbits
|
| 641 |
|
|
.global _exit
|
| 642 |
|
|
.func _exit
|
| 643 |
|
|
_exit:
|
| 644 |
|
|
.weak exit
|
| 645 |
|
|
exit:
|
| 646 |
|
|
|
| 647 |
|
|
/* Code from .fini8 ... .fini1 sections inserted by ld script. */
|
| 648 |
|
|
|
| 649 |
|
|
.section .fini0,"ax",@progbits
|
| 650 |
|
|
__stop_program:
|
| 651 |
|
|
rjmp __stop_program
|
| 652 |
|
|
.endfunc
|
| 653 |
|
|
#endif /* defined (L_exit) */
|
| 654 |
|
|
|
| 655 |
|
|
#ifdef L_cleanup
|
| 656 |
|
|
.weak _cleanup
|
| 657 |
|
|
.func _cleanup
|
| 658 |
|
|
_cleanup:
|
| 659 |
|
|
ret
|
| 660 |
|
|
.endfunc
|
| 661 |
|
|
#endif /* defined (L_cleanup) */
|
| 662 |
|
|
|
| 663 |
|
|
#ifdef L_tablejump
|
| 664 |
|
|
.global __tablejump2__
|
| 665 |
|
|
.func __tablejump2__
|
| 666 |
|
|
__tablejump2__:
|
| 667 |
|
|
lsl r30
|
| 668 |
|
|
rol r31
|
| 669 |
|
|
.global __tablejump__
|
| 670 |
|
|
__tablejump__:
|
| 671 |
|
|
#if defined (__AVR_ENHANCED__)
|
| 672 |
|
|
lpm __tmp_reg__, Z+
|
| 673 |
|
|
lpm r31, Z
|
| 674 |
|
|
mov r30, __tmp_reg__
|
| 675 |
|
|
ijmp
|
| 676 |
|
|
#else
|
| 677 |
|
|
lpm
|
| 678 |
|
|
adiw r30, 1
|
| 679 |
|
|
push r0
|
| 680 |
|
|
lpm
|
| 681 |
|
|
push r0
|
| 682 |
|
|
ret
|
| 683 |
|
|
#endif
|
| 684 |
|
|
.endfunc
|
| 685 |
|
|
#endif /* defined (L_tablejump) */
|
| 686 |
|
|
|
| 687 |
|
|
/* __do_copy_data is only necessary if there is anything in .data section.
|
| 688 |
|
|
Does not use RAMPZ - crt*.o provides a replacement for >64K devices. */
|
| 689 |
|
|
|
| 690 |
|
|
#ifdef L_copy_data
|
| 691 |
|
|
.section .init4,"ax",@progbits
|
| 692 |
|
|
.global __do_copy_data
|
| 693 |
|
|
__do_copy_data:
|
| 694 |
|
|
ldi r17, hi8(__data_end)
|
| 695 |
|
|
ldi r26, lo8(__data_start)
|
| 696 |
|
|
ldi r27, hi8(__data_start)
|
| 697 |
|
|
ldi r30, lo8(__data_load_start)
|
| 698 |
|
|
ldi r31, hi8(__data_load_start)
|
| 699 |
|
|
rjmp .do_copy_data_start
|
| 700 |
|
|
.do_copy_data_loop:
|
| 701 |
|
|
#if defined (__AVR_HAVE_LPMX__)
|
| 702 |
|
|
lpm r0, Z+
|
| 703 |
|
|
#else
|
| 704 |
|
|
lpm
|
| 705 |
|
|
adiw r30, 1
|
| 706 |
|
|
#endif
|
| 707 |
|
|
st X+, r0
|
| 708 |
|
|
.do_copy_data_start:
|
| 709 |
|
|
cpi r26, lo8(__data_end)
|
| 710 |
|
|
cpc r27, r17
|
| 711 |
|
|
brne .do_copy_data_loop
|
| 712 |
|
|
#endif /* L_copy_data */
|
| 713 |
|
|
|
| 714 |
|
|
/* __do_clear_bss is only necessary if there is anything in .bss section. */
|
| 715 |
|
|
|
| 716 |
|
|
#ifdef L_clear_bss
|
| 717 |
|
|
.section .init4,"ax",@progbits
|
| 718 |
|
|
.global __do_clear_bss
|
| 719 |
|
|
__do_clear_bss:
|
| 720 |
|
|
ldi r17, hi8(__bss_end)
|
| 721 |
|
|
ldi r26, lo8(__bss_start)
|
| 722 |
|
|
ldi r27, hi8(__bss_start)
|
| 723 |
|
|
rjmp .do_clear_bss_start
|
| 724 |
|
|
.do_clear_bss_loop:
|
| 725 |
|
|
st X+, __zero_reg__
|
| 726 |
|
|
.do_clear_bss_start:
|
| 727 |
|
|
cpi r26, lo8(__bss_end)
|
| 728 |
|
|
cpc r27, r17
|
| 729 |
|
|
brne .do_clear_bss_loop
|
| 730 |
|
|
#endif /* L_clear_bss */
|
| 731 |
|
|
|
| 732 |
|
|
/* __do_global_ctors and __do_global_dtors are only necessary
|
| 733 |
|
|
if there are any constructors/destructors. */
|
| 734 |
|
|
|
| 735 |
|
|
#if defined (__AVR_MEGA__)
|
| 736 |
|
|
#define XCALL call
|
| 737 |
|
|
#else
|
| 738 |
|
|
#define XCALL rcall
|
| 739 |
|
|
#endif
|
| 740 |
|
|
|
| 741 |
|
|
#ifdef L_ctors
|
| 742 |
|
|
.section .init6,"ax",@progbits
|
| 743 |
|
|
.global __do_global_ctors
|
| 744 |
|
|
__do_global_ctors:
|
| 745 |
|
|
ldi r17, hi8(__ctors_start)
|
| 746 |
|
|
ldi r28, lo8(__ctors_end)
|
| 747 |
|
|
ldi r29, hi8(__ctors_end)
|
| 748 |
|
|
rjmp .do_global_ctors_start
|
| 749 |
|
|
.do_global_ctors_loop:
|
| 750 |
|
|
sbiw r28, 2
|
| 751 |
|
|
mov_h r31, r29
|
| 752 |
|
|
mov_l r30, r28
|
| 753 |
|
|
XCALL __tablejump__
|
| 754 |
|
|
.do_global_ctors_start:
|
| 755 |
|
|
cpi r28, lo8(__ctors_start)
|
| 756 |
|
|
cpc r29, r17
|
| 757 |
|
|
brne .do_global_ctors_loop
|
| 758 |
|
|
#endif /* L_ctors */
|
| 759 |
|
|
|
| 760 |
|
|
#ifdef L_dtors
|
| 761 |
|
|
.section .fini6,"ax",@progbits
|
| 762 |
|
|
.global __do_global_dtors
|
| 763 |
|
|
__do_global_dtors:
|
| 764 |
|
|
ldi r17, hi8(__dtors_end)
|
| 765 |
|
|
ldi r28, lo8(__dtors_start)
|
| 766 |
|
|
ldi r29, hi8(__dtors_start)
|
| 767 |
|
|
rjmp .do_global_dtors_start
|
| 768 |
|
|
.do_global_dtors_loop:
|
| 769 |
|
|
mov_h r31, r29
|
| 770 |
|
|
mov_l r30, r28
|
| 771 |
|
|
XCALL __tablejump__
|
| 772 |
|
|
adiw r28, 2
|
| 773 |
|
|
.do_global_dtors_start:
|
| 774 |
|
|
cpi r28, lo8(__dtors_end)
|
| 775 |
|
|
cpc r29, r17
|
| 776 |
|
|
brne .do_global_dtors_loop
|
| 777 |
|
|
#endif /* L_dtors */
|
| 778 |
|
|
|
