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sha256_via: add further comments on byte-swapping work

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Jeff Garzik 2010-11-27 03:45:47 -05:00 committed by Jeff Garzik
parent 4da2e4fbe2
commit eeea340b17
1 changed files with 2 additions and 0 deletions
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sha256_via.c
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@ -42,6 +42,8 @@ bool scanhash_via(unsigned char *midstate, const unsigned char *data_in,
/* bitcoin gives us big endian input, but via wants LE, /* bitcoin gives us big endian input, but via wants LE,
* so we reverse the swapping bitcoin has already done (extra work) * so we reverse the swapping bitcoin has already done (extra work)
* in order to permit the hardware to swap everything
* back to BE again (extra work).
*/ */
for (i = 0; i < 128/4; i++) { for (i = 0; i < 128/4; i++) {
uint32_t *data32 = (uint32_t *) data; uint32_t *data32 = (uint32_t *) data;