Hello,
I experienced some odd effect when msp430-gcc tries to inline memcpy
and/or memset.
the code
#include <stdint.h>
void test_memcpy(void)
{
uint8_t mybuffer[10];
memset((uint8_t*)&mybuffer, 0, 10);
}
when compiled with
msp430-gcc -c -O2 -mmcu=msp430f449 mspgcc_memcpy.c
results in
Disassembly of section .text:
00000000 <test_memcpy>:
0: 31 50 f6 ff add #-10, r1 ;#0xfff6
4: 81 43 06 00 mov #0, 6(r1) ;r3 As==00, 0x0006(r1)
8: 81 43 08 00 mov #0, 8(r1) ;r3 As==00, 0x0008(r1)
c: 31 50 0a 00 add #10, r1 ;#0x000a
10: 30 41 ret
In my opion thats not clearing 10 bytes....
Without optimation the code appears sound.
msp430-gcc (GCC) 4.7.0 20120322 (mspgcc dev 20120911)
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Same size problem I noticed with memcpy if inlined....
best regards
Kees
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