URL
https://opencores.org/ocsvn/forwardcom/forwardcom/trunk
Subversion Repositories forwardcom
[/] [forwardcom/] [libraries/] [clear_input_light.as] - Rev 151
Go to most recent revision | Compare with Previous | Blame | View Log
/**************************** clear_input_light.as ***************************
* Author: Agner Fog
* date created: 2021-05-31
* Last modified: 2021-05-31
* Version: 1.11
* Project: ForwardCom library libc_light.li
* Description: clear_input: Clear input buffer for stdin
* This version is for small CPUs with limited capabilities
* The following instructions are avoided: mul, div, push, pop, sys_call.
* Input comes directly from input port 8
* Output to stdout goes directly to output port 10
*
* C declaration:
* void clear_input();
*
* Copyright 2021 GNU General Public License http://www.gnu.org/licenses
*****************************************************************************/
// define input and output port numbers
%stdin_port = 8
%stdin_status_port = 9
%stdout_port = 10
code section execute
_clear_input function public reguse = 0, 0
// save r1
int64 sp -= 1*8
int64 [sp] = r1
int r1 = 1
int output(r1,r1,stdin_status_port) // clear input buffer
// restore r1
int64 r1 = [sp]
int64 sp += 1*8
return
_clear_input end
code end
Go to most recent revision | Compare with Previous | Blame | View Log