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2002-03-06 Victor V. Vengerov <vvv@oktet.ru>

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* rtems/score/m68k.h [M68K_COLDFIRE_ARCH] (CPU_swap_u16, CPU_swap_u32):
	Generic implementation of endian swap primitives added for Coldfire
	family.
This commit is contained in:
Joel Sherrill
2002-03-06 14:37:38 +00:00
parent b04ee63e3d
commit 9f9871f81e
4 changed files with 78 additions and 0 deletions
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6
c/src/exec/score/cpu/m68k/ChangeLog
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@@ -1,3 +1,9 @@
2002-03-06 Victor V. Vengerov <vvv@oktet.ru>
* rtems/score/m68k.h [M68K_COLDFIRE_ARCH] (CPU_swap_u16, CPU_swap_u32):
Generic implementation of endian swap primitives added for Coldfire
family.
2002-01-29 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
* rtems/Makefile.am: Removed.

33
c/src/exec/score/cpu/m68k/rtems/score/m68k.h
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@@ -229,6 +229,10 @@ extern "C" {
#endif
#ifndef ASM
#include <rtems/score/m68ktypes.h>
#endif
/*
* If the above did not specify a ColdFire architecture, then set
* this flag to indicate that it is not a ColdFire CPU.
@@ -326,6 +330,34 @@ extern "C" {
* The following routine swaps the endian format of an unsigned int.
* It must be static because it is referenced indirectly.
*/
#if ( M68K_COLDFIRE_ARCH == 1 )
/* There are no rotate commands in Coldfire architecture. We will use
* generic implementation of endian swapping for Coldfire.
*/
static inline unsigned int CPU_swap_u32(
unsigned int value
)
{
unsigned32 byte1, byte2, byte3, byte4, swapped;
byte4 = (value >> 24) & 0xff;
byte3 = (value >> 16) & 0xff;
byte2 = (value >> 8) & 0xff;
byte1 = value & 0xff;
swapped = (byte1 << 24) | (byte2 << 16) | (byte3 << 8) | byte4;
return( swapped );
}
static inline unsigned int m68k_swap_u16(
unsigned int value
)
{
return (((value & 0xff) << 8) | ((value >> 8) & 0xff));
}
#else
static inline unsigned int m68k_swap_u32(
unsigned int value
@@ -350,6 +382,7 @@ static inline unsigned int m68k_swap_u16(
return( swapped );
}
#endif
#define CPU_swap_u32( value ) m68k_swap_u32( value )
#define CPU_swap_u16( value ) m68k_swap_u16( value )

6
cpukit/score/cpu/m68k/ChangeLog
View File

@@ -1,3 +1,9 @@
2002-03-06 Victor V. Vengerov <vvv@oktet.ru>
* rtems/score/m68k.h [M68K_COLDFIRE_ARCH] (CPU_swap_u16, CPU_swap_u32):
Generic implementation of endian swap primitives added for Coldfire
family.
2002-01-29 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
* rtems/Makefile.am: Removed.

33
cpukit/score/cpu/m68k/rtems/score/m68k.h
View File

@@ -229,6 +229,10 @@ extern "C" {
#endif
#ifndef ASM
#include <rtems/score/m68ktypes.h>
#endif
/*
* If the above did not specify a ColdFire architecture, then set
* this flag to indicate that it is not a ColdFire CPU.
@@ -326,6 +330,34 @@ extern "C" {
* The following routine swaps the endian format of an unsigned int.
* It must be static because it is referenced indirectly.
*/
#if ( M68K_COLDFIRE_ARCH == 1 )
/* There are no rotate commands in Coldfire architecture. We will use
* generic implementation of endian swapping for Coldfire.
*/
static inline unsigned int CPU_swap_u32(
unsigned int value
)
{
unsigned32 byte1, byte2, byte3, byte4, swapped;
byte4 = (value >> 24) & 0xff;
byte3 = (value >> 16) & 0xff;
byte2 = (value >> 8) & 0xff;
byte1 = value & 0xff;
swapped = (byte1 << 24) | (byte2 << 16) | (byte3 << 8) | byte4;
return( swapped );
}
static inline unsigned int m68k_swap_u16(
unsigned int value
)
{
return (((value & 0xff) << 8) | ((value >> 8) & 0xff));
}
#else
static inline unsigned int m68k_swap_u32(
unsigned int value
@@ -350,6 +382,7 @@ static inline unsigned int m68k_swap_u16(
return( swapped );
}
#endif
#define CPU_swap_u32( value ) m68k_swap_u32( value )
#define CPU_swap_u16( value ) m68k_swap_u16( value )