diff options
Diffstat (limited to 'cores/arduino')
| -rw-r--r-- | cores/arduino/wiring_pulse.S | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/cores/arduino/wiring_pulse.S b/cores/arduino/wiring_pulse.S new file mode 100644 index 0000000..ffd70f5 --- /dev/null +++ b/cores/arduino/wiring_pulse.S @@ -0,0 +1,176 @@ +/* + wiring_pulse.s - pulseInASM() function in different flavours + Part of Arduino - http://www.arduino.cc/ + + Copyright (c) 2014 Martino Facchin + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General + Public License along with this library; if not, write to the + Free Software Foundation, Inc., 59 Temple Place, Suite 330, + Boston, MA 02111-1307 USA +*/ + +# The following routine was generated by avr-gcc 4.8.3 with the following parameters +# -gstabs -Wa,-ahlmsd=output.lst -dp -fverbose-asm -O2 +# on the original C function +# +# unsigned long pulseInSimpl(volatile uint8_t *port, uint8_t bit, uint8_t stateMask, unsigned long maxloops) +# { +# unsigned long width = 0; +# // wait for any previous pulse to end +# while ((*port & bit) == stateMask) +# if (--maxloops == 0) +# return 0; +# +# // wait for the pulse to start +# while ((*port & bit) != stateMask) +# if (--maxloops == 0) +# return 0; +# +# // wait for the pulse to stop +# while ((*port & bit) == stateMask) { +# if (++width == maxloops) +# return 0; +# } +# return width; +# } +# +# some compiler outputs were removed but the rest of the code is untouched + +#include <avr/io.h> + +.section .text + +.global countPulseASM + +countPulseASM: + +.LM0: +.LFBB1: + push r12 ; ; 130 pushqi1/1 [length = 1] + push r13 ; ; 131 pushqi1/1 [length = 1] + push r14 ; ; 132 pushqi1/1 [length = 1] + push r15 ; ; 133 pushqi1/1 [length = 1] + push r16 ; ; 134 pushqi1/1 [length = 1] + push r17 ; ; 135 pushqi1/1 [length = 1] +/* prologue: function */ +/* frame size = 0 */ +/* stack size = 6 */ +.L__stack_usage = 6 + mov r30,r24 ; port, port ; 2 *movhi/1 [length = 2] + mov r31,r25 ; port, port +/* unsigned long width = 0; +*** // wait for any previous pulse to end +*** while ((*port & bit) == stateMask) +*/ +.LM1: + rjmp .L2 ; ; 181 jump [length = 1] +.L4: +/* if (--maxloops == 0) */ +.LM2: + subi r16,1 ; maxloops, ; 17 addsi3/2 [length = 4] + sbc r17, r1 ; maxloops + sbc r18, r1 ; maxloops + sbc r19, r1 ; maxloops + breq .L13 ; , ; 19 branch [length = 1] +.L2: +/* if (--maxloops == 0) */ +.LM3: + ld r25,Z ; D.1554, *port_7(D) ; 22 movqi_insn/4 [length = 1] + and r25,r22 ; D.1554, bit ; 24 andqi3/1 [length = 1] + cp r25,r20 ; D.1554, stateMask ; 25 *cmpqi/2 [length = 1] + breq .L4 ; , ; 26 branch [length = 1] + rjmp .L6 ; ; 184 jump [length = 1] +.L7: +/* return 0; +*** +*** // wait for the pulse to start +*** while ((*port & bit) != stateMask) +*** if (--maxloops == 0) +*/ +.LM4: + subi r16,1 ; maxloops, ; 31 addsi3/2 [length = 4] + sbc r17, r1 ; maxloops + sbc r18, r1 ; maxloops + sbc r19, r1 ; maxloops + breq .L13 ; , ; 33 branch [length = 1] +.L6: +/* if (--maxloops == 0) */ +.LM5: + ld r25,Z ; D.1554, *port_7(D) ; 41 movqi_insn/4 [length = 1] + and r25,r22 ; D.1554, bit ; 43 andqi3/1 [length = 1] + cpse r25,r20 ; D.1554, stateMask ; 44 enable_interrupt-3 [length = 1] + rjmp .L7 ; + mov r12, r1 ; width ; 7 *movsi/2 [length = 4] + mov r13, r1 ; width + mov r14, r1 ; width + mov r15, r1 ; width + rjmp .L9 ; ; 186 jump [length = 1] +.L10: +/* return 0; +*** +*** // wait for the pulse to stop +*** while ((*port & bit) == stateMask) { +*** if (++width == maxloops) +*/ +.LM6: + ldi r24,-1 ; , ; 50 addsi3/3 [length = 5] + sub r12,r24 ; width, + sbc r13,r24 ; width, + sbc r14,r24 ; width, + sbc r15,r24 ; width, + cp r16,r12 ; maxloops, width ; 51 *cmpsi/2 [length = 4] + cpc r17,r13 ; maxloops, width + cpc r18,r14 ; maxloops, width + cpc r19,r15 ; maxloops, width + breq .L13 ; , ; 52 branch [length = 1] +.L9: +/* if (++width == maxloops) */ +.LM7: + ld r24,Z ; D.1554, *port_7(D) ; 60 movqi_insn/4 [length = 1] + and r24,r22 ; D.1554, bit ; 62 andqi3/1 [length = 1] + cp r24,r20 ; D.1554, stateMask ; 63 *cmpqi/2 [length = 1] + breq .L10 ; , ; 64 branch [length = 1] +/* return 0; +*** } +*** return width; +*/ +.LM8: + mov r22,r12 ; D.1553, width ; 108 movqi_insn/1 [length = 1] + mov r23,r13 ; D.1553, width ; 109 movqi_insn/1 [length = 1] + mov r24,r14 ; D.1553, width ; 110 movqi_insn/1 [length = 1] + mov r25,r15 ; D.1553, width ; 111 movqi_insn/1 [length = 1] +/* epilogue start */ +.LM9: + pop r17 ; ; 171 popqi [length = 1] + pop r16 ; ; 172 popqi [length = 1] + pop r15 ; ; 173 popqi [length = 1] + pop r14 ; ; 174 popqi [length = 1] + pop r13 ; ; 175 popqi [length = 1] + pop r12 ; ; 176 popqi [length = 1] + ret ; 177 return_from_epilogue [length = 1] +.L13: +.LM10: + ldi r22,0 ; D.1553 ; 120 movqi_insn/1 [length = 1] + ldi r23,0 ; D.1553 ; 121 movqi_insn/1 [length = 1] + ldi r24,0 ; D.1553 ; 122 movqi_insn/1 [length = 1] + ldi r25,0 ; D.1553 ; 123 movqi_insn/1 [length = 1] +/* epilogue start */ +.LM11: + pop r17 ; ; 138 popqi [length = 1] + pop r16 ; ; 139 popqi [length = 1] + pop r15 ; ; 140 popqi [length = 1] + pop r14 ; ; 141 popqi [length = 1] + pop r13 ; ; 142 popqi [length = 1] + pop r12 ; ; 143 popqi [length = 1] + ret ; 144 return_from_epilogue [length = 1] |