source: trunk/libs/newlib/src/libgloss/ft32/sim-write.S @ 476

Last change on this file since 476 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 1.4 KB
Line 
1/*
2 * sim-write.S -- write interface for FT32 simulator
3 *
4 * Copyright (C) 2015 FTDI (support@ftdichip.com)
5 *
6 * The authors hereby grant permission to use, copy, modify, distribute,
7 * and license this software and its documentation for any purpose, provided
8 * that existing copyright notices are retained in all copies and that this
9 * notice is included verbatim in any distributions. No written agreement,
10 * license, or royalty fee is required for any of the authorized uses.
11 * Modifications to this software may be copyrighted by their authors
12 * and need not follow the licensing terms described here, provided that
13 * the new terms are clearly indicated on the first page of each file where
14 * they apply.
15 */
16
17#include "syscall.h"
18
19/*
20 * Input:
21 * $r0            -- File descriptor.
22 * $r1            -- String to be printed.
23 * $r2      -- Length of the string.
24 *
25 * Output:
26 * $r0          -- Length written or -1.
27 * errno  -- Set if an error
28 */
29
30        .globl        _write
31        .type        _write,@function
32        .weak        write
33        .text
34_write:
35write:
36
37#         LDI.l   $r1,$r0,0
38#         STA.l   MAGIC,$r1
39#         jmp     .f
40#
41# .loop:
42#         sta.l   0x10000,$r2
43#         add.l   $r0,$r0,1
44# .f:
45#         ldi.b   $r2,$r0,0
46#         cmp.b   $r2,0
47#         jmpc    nz,.loop
48
49        ldk.l   $r3,0x10000
50        streamout.b $r3,$r1,$r2
51        move.l  $r0,$r2
52
53        return
54
55.Lend:
56        .size        _write,.Lend-_write
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