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embedded: save stack 

and also do not recaluate the crc32_table upon
every invocation.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
__archive__
Øyvind Harboe 2009-11-21 23:45:36 +01:00
parent 808e53368c
commit 31da0003dc
1 changed files with 15 additions and 9 deletions
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24
src/target/image.c
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@ -1023,17 +1023,23 @@ int image_calculate_checksum(uint8_t* buffer, uint32_t nbytes, uint32_t* checksu
uint32_t crc = 0xffffffff; uint32_t crc = 0xffffffff;
LOG_DEBUG("Calculating checksum"); LOG_DEBUG("Calculating checksum");
uint32_t crc32_table[256]; static uint32_t crc32_table[256];
/* Initialize the CRC table and the decoding table. */ static bool first_init = false;
int i, j; if (!first_init)
unsigned int c;
for (i = 0; i < 256; i++)
{ {
/* as per gdb */ /* Initialize the CRC table and the decoding table. */
for (c = i << 24, j = 8; j > 0; --j) int i, j;
c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); unsigned int c;
crc32_table[i] = c; for (i = 0; i < 256; i++)
{
/* as per gdb */
for (c = i << 24, j = 8; j > 0; --j)
c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
crc32_table[i] = c;
}
first_init = true;
} }
while (nbytes > 0) while (nbytes > 0)