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2008-08-19 Joel Sherrill <joel.sherrill@OARcorp.com>

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* cpu.c, rtems/score/cpu.h: Add extern for bfffo table and rename it to
	indicate that it is specific to this architecture.
This commit is contained in:
Joel Sherrill
2008-08-19 14:19:12 +00:00
parent 3fe64cb577
commit 60a3fa0c2e
3 changed files with 17 additions and 7 deletions
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5
cpukit/score/cpu/m68k/ChangeLog
View File

@@ -1,3 +1,8 @@
2008-08-19 Joel Sherrill <joel.sherrill@OARcorp.com>
* cpu.c, rtems/score/cpu.h: Add extern for bfffo table and rename it to
indicate that it is specific to this architecture.
2008-07-31 Joel Sherrill <joel.sherrill@OARcorp.com>
* rtems/score/cpu.h: Correct prototype of Idle threads.

2
cpukit/score/cpu/m68k/cpu.c
View File

@@ -159,7 +159,7 @@ void _CPU_Install_interrupt_stack( void )
/*
* Returns table for duplication of the BFFFO instruction (16 bits only)
*/
const unsigned char __BFFFOtable[256] = {
const unsigned char _CPU_m68k_BFFFO_table[256] = {
8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

17
cpukit/score/cpu/m68k/rtems/score/cpu.h
View File

@@ -517,6 +517,13 @@ void *_CPU_Thread_Idle_body( uint32_t );
#define CPU_USE_GENERIC_BITFIELD_CODE FALSE
#define CPU_USE_GENERIC_BITFIELD_DATA FALSE
#if ( M68K_HAS_BFFFO != 1 )
/*
* Lookup table for BFFFO simulation
*/
extern const unsigned char _CPU_m68k_BFFFO_table[256];
#endif
#if ( M68K_HAS_BFFFO == 1 )
#define _CPU_Bitfield_Find_first_bit( _value, _output ) \
@@ -537,9 +544,9 @@ void *_CPU_Thread_Idle_body( uint32_t );
_CPU_Priority_bits_index is not needed), handles the 0 case, and
does not molest _value -- jsg */
#if ( defined(__mcoldfire__) )
#define _CPU_Bitfield_Find_first_bit( _value, _output ) \
{ \
extern const unsigned char __BFFFOtable[256]; \
register int dumby; \
\
asm volatile ( \
@@ -554,13 +561,12 @@ void *_CPU_Thread_Idle_body( uint32_t );
" addq.l #8,%0\n" \
"0: and.l #0xff,%0\n" \
: "=&d" ((_output)), "=&d" ((dumby)) \
: "d" ((_value)), "ao" ((__BFFFOtable)) \
: "d" ((_value)), "ao" ((_CPU_m68k_BFFFO_table)) \
: "cc" ) ; \
}
#elif ( M68K_HAS_EXTB_L == 1 )
#define _CPU_Bitfield_Find_first_bit( _value, _output ) \
{ \
extern const unsigned char __BFFFOtable[256]; \
register int dumby; \
\
asm volatile ( " move.w %2,%1\n" \
@@ -573,13 +579,12 @@ void *_CPU_Thread_Idle_body( uint32_t );
" add.b (%3,%2.w),%0\n" \
"0:\n" \
: "=&d" ((_output)), "=&d" ((dumby)) \
: "d" ((_value)), "ao" ((__BFFFOtable)) \
: "d" ((_value)), "ao" ((_CPU_m68k_BFFFO_table)) \
: "cc" ) ; \
}
#else
#define _CPU_Bitfield_Find_first_bit( _value, _output ) \
{ \
extern const unsigned char __BFFFOtable[256]; \
register int dumby; \
\
asm volatile ( " move.w %2,%1\n" \
@@ -592,7 +597,7 @@ void *_CPU_Thread_Idle_body( uint32_t );
" add.b (%3,%2.w),%0\n" \
"0:\n" \
: "=&d" ((_output)), "=&d" ((dumby)) \
: "d" ((_value)), "ao" ((__BFFFOtable)) \
: "d" ((_value)), "ao" ((_CPU_m68k_BFFFO_table)) \
: "cc" ) ; \
}
#endif