diff options
Diffstat (limited to 'c/src/exec/score/cpu/i386/i386.h')
| -rw-r--r-- | c/src/exec/score/cpu/i386/i386.h | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/c/src/exec/score/cpu/i386/i386.h b/c/src/exec/score/cpu/i386/i386.h index 7f35a68ace..91c5294221 100644 --- a/c/src/exec/score/cpu/i386/i386.h +++ b/c/src/exec/score/cpu/i386/i386.h @@ -165,10 +165,26 @@ static inline unsigned int i386_swap_U32( unsigned int value ) { + unsigned long lout; + asm volatile( "rorw $8,%%ax;" "rorl $16,%0;" - "rorw $8,%%ax" : "=a" (value) : "0" (value) ); - return( value ); + "rorw $8,%%ax" : "=a" (lout) : "0" (value) ); +/* this should be better for i486dx and above */ +/* + __asm__ volatile( "bswap %0" : "=r" (lout) : "0" (lin)); +*/ + return( lout ); +} + +static inline unsigned int i386_swap_U16( + unsigned int value +) +{ + unsigned short sout; + + __asm__ volatile( "rorw $8,%0" : "=r" (sout) : "0" (value)); + return (sout); } /* @@ -439,6 +455,7 @@ void i386_Install_idt( #define get_gs() i386_get_gs() #define CPU_swap_u32( _value ) i386_swap_U32( _value ) +#define CPU_swap_u16( _value ) i386_swap_U16( _value ) /* i80x86 I/O instructions */ |