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Removed the asm version of translate_bytes(). When both the C

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version and the asm version are inlined, and everything is cached,
the asm version is 1.75 times slower than the C version on P5's.
On K6's, it is only 1.25 times slower.
This commit is contained in:
bde 1999-01-09 13:50:52 +00:00
parent 2616cfa856
commit 69095f699e
1 changed files with 0 additions and 29 deletions
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29
sys/i386/isa/sound/audio.c
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@ -57,15 +57,6 @@ static char *wr_dma_buf[MAX_AUDIO_DEV];
static int audio_format[MAX_AUDIO_DEV];
static int local_conversion[MAX_AUDIO_DEV];
#if defined(NO_INLINE_ASM) || !defined(__i386__)
static void
translate_bytes(const u_char *table, u_char *buff, int n);
#else
extern __inline void
translate_bytes(const void *table, void *buff, int n);
#endif
static int
set_format(int dev, int fmt)
{
@ -148,7 +139,6 @@ audio_release(int dev, struct fileinfo * file)
}
#if defined(NO_INLINE_ASM) || !defined(__i386__)
static void
translate_bytes(const u_char *table, u_char *buff, int n)
{
@ -161,25 +151,6 @@ translate_bytes(const u_char *table, u_char *buff, int n)
buff[i] = table[buff[i]];
}
#else
extern __inline void
translate_bytes(const void *table, void *buff, int n)
{
if (n > 0) {
__asm __volatile(
"cld\n"
"1:\tlodsb\n\t"
"xlatb\n\t"
"stosb\n\t"
"loop 1b\n\t"
: "=b" (table), "=c" (n), "=D" (buff), "=S" (buff)
: "0" (table), "1" (n), "2" (buff), "3" (buff)
: "ax", "memory");
}
}
#endif
int
audio_write(int dev, struct fileinfo * file, snd_rw_buf * buf, int count)
{