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fixed code for an old gcc compiler that couldn't recognize x86 inline assembly containing the rep prefix on the same line as the movXX and stoXX instructions.

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hyung-hwan
2014-10-17 15:37:36 +00:00
parent a842cf0767
commit e7287cb52c
3 changed files with 20 additions and 9 deletions
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8
qse/lib/cmn/mem.c
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@ -133,14 +133,14 @@ void* qse_memcpy (void* dst, const void* src, qse_size_t n)
__asm__ volatile (
"cld\n\t"
"rep movsl\n"
"rep\n\tmovsl\n"
: /* no output */
:"D" (dst), "S" (src), "c" (n >> 2) /* input: %edi = d, %esi = src, %ecx = n / 8 */
:"memory"
);
__asm__ volatile (
"rep movsb\n"
"rep\n\tmovsb\n"
: /* no output */
:"c" (n & 3) /* %rcx = n % 8, use existing %edi and %esi */
:"memory", "%edi", "%esi"
@ -348,7 +348,7 @@ void* qse_memset (void* dst, int val, qse_size_t n)
}
__asm__ volatile (
"rep stosl\n"
"rep\n\tstosl\n"
:"=D" (d) /* output: d = %edi */
:"0" (d), "a" (dw), "c" (n >> 2) /* input: %edi = d, %eax = dw, %ecx = n / 4 */
:"memory"
@ -356,7 +356,7 @@ void* qse_memset (void* dst, int val, qse_size_t n)
}
__asm__ volatile (
"rep stosb\n"
"rep\n\tstosb\n"
: /* no output */
:"D" (d), "a" (val), "c" (n & 3) /* input: %edi = d, %eax = src, %ecx = n % 4 */
:"memory"