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#include "sys/syscall.h"
int _read(file, ptr, len)
int file;
char *ptr;
int len;
{
register int ret asm("r0") ;
/* Type cast int as short so that we can copy int values into 16 bit
registers in case of -mint32 switch is given.
This is not going to affect data as file= 0 for stdin and len=1024 */
asm("mov.b %0, r0l":: "i" (SYS_read)) ; /* Syscall Number */
asm("mov.w %0, r1" :: "r"((short)file) :"r1", "r2", "r3") ;
asm("mov.w %0, r3" :: "r"((short)len) :"r1", "r2", "r3") ;
#ifdef __H8300__
asm("mov.w %0, r2" :: "r"(ptr) :"r1", "r2", "r3") ;
#else
asm("mov.l %0, er2" :: "r"(ptr) :"r1", "er2", "r3") ;
#endif
// This is magic trap similar to _write for simulator
asm("jsr @@0xc8") ;
return ret;
}
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