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Replace SWAB16 and SWAB32 with a comprehensive set of byte-swap macros - letoh16, letoh32, htole16, htole32, betoh16, betoh32, htobe16 and htobe32

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7584 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2005-10-06 19:27:43 +00:00
parent 1c3a83c44e
commit 9e19c95d8e
8 changed files with 89 additions and 60 deletions
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6
firmware/drivers/ata.c
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@ -362,7 +362,7 @@ static void copy_read_sectors(unsigned char* buf, int wordcount)
{ /* loop compiles to 7 assembler instructions */
/* takes 12 clock cycles (2 pipeline stalls, 1 wait) */
#ifdef SWAP_WORDS
*wbuf = SWAB16(ATA_DATA);
*wbuf = letoh16(ATA_DATA);
#else
*wbuf = ATA_DATA;
#endif
@ -677,7 +677,7 @@ static void copy_write_sectors(const unsigned char* buf, int wordcount)
#ifdef SWAP_WORDS
/* loop compiles to 6 assembler instructions */
/* takes 10 clock cycles (2 pipeline stalls) */
SET_16BITREG(ATA_DATA, SWAB16(*wbuf));
SET_16BITREG(ATA_DATA, htole16(*wbuf));
#else
SET_16BITREG(ATA_DATA, *wbuf);
#endif
@ -1270,7 +1270,7 @@ static int identify(void)
#ifdef SWAP_WORDS
identify_info[i] = ATA_DATA;
#else
identify_info[i] = SWAB16(ATA_DATA);
identify_info[i] = letoh16(ATA_DATA);
#endif
}