/*
* Copyright 2009, Johannes Wischert. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#include <asm_defs.h>
.text
/* uint16 __swap_int16(uint16 value)
*/
FUNCTION(__swap_int16):
#if __ARM_ARCH__ >= 6
rev16 r0,r0
#else
#warning IMPLEMENT_ME
and r1,r0,#0x000000ff
and r2,r0,#0x0000ff00
mov r1,r1,LSL #8
mov r2,r2,ROR #8
orr r0,r1,r2
#endif
mov pc,lr
FUNCTION_END(__swap_int16)
/* uint32 __swap_int32(uint32 value)
*/
FUNCTION(__swap_int32):
#if __ARM_ARCH__ >= 6
rev r0,r0
#else
#warning IMPLEMENT_ME
mov r3,#0xff000000
orr r3,#0x0000ff00
and r1,r0,r3
mov r1,r1,ROR #24
mov r3,r3,ROR #8
and r2,r0,r3
mov r2,r2,ROR #8
orr r0,r1,r2
#endif
mov pc,lr
FUNCTION_END(__swap_int32)
/* uint64 __swap_int64(uint64 value)
*/
FUNCTION(__swap_int64):
#if __ARM_ARCH__ >= 6
rev r0,r0
rev r1,r1
mov r12,r0
mov r0,r1
mov r1,r12
#else
#warning IMPLEMENT_ME
#endif
mov pc,lr
FUNCTION_END(__swap_int64)
/* TODO: The following functions can surely be optimized. A simple optimization
* would be to define macros with the contents of the __swap_int{32,64}
* functions and use those instead of calling the functions.
*/
/* float __swap_float(float value)
*/
FUNCTION(__swap_float):
b __swap_int32
//rts
FUNCTION_END(__swap_float)
/* double __swap_double(double value)
*/
FUNCTION(__swap_double):
b __swap_int32
//rts
#warning M68K: XXX:check sizeof(double)
FUNCTION_END(__swap_double)
