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xv6/x86.h: add stosb, fix bugs in insl/outsl (rep not repne)

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rsc 2009-03-08 21:27:57 +00:00
parent 4003e9bed8
commit c396d065d3
1 changed files with 11 additions and 2 deletions
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13
x86.h
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@ -12,7 +12,7 @@ inb(ushort port)
static inline void
insl(int port, void *addr, int cnt)
{
asm volatile("cld; repne insl" :
asm volatile("cld; rep insl" :
"=D" (addr), "=c" (cnt) :
"d" (port), "0" (addr), "1" (cnt) :
"memory", "cc");
@ -33,12 +33,21 @@ outw(ushort port, ushort data)
static inline void
outsl(int port, const void *addr, int cnt)
{
asm volatile("cld; repne outsl" :
asm volatile("cld; rep outsl" :
"=S" (addr), "=c" (cnt) :
"d" (port), "0" (addr), "1" (cnt) :
"cc");
}
static inline void
stosb(void *addr, int data, int cnt)
{
asm volatile("cld; rep stosb" :
"=D" (addr), "=c" (cnt) :
"0" (addr), "1" (cnt), "a" (data) :
"memory", "cc");
}
static inline uint
read_ebp(void)
{