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include/sys/bitops.h File Reference

Internal Interface: H8/300 bit operations. More...

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Defines

#define ASMCONST   const
#define bit_set(byte, bit)   __asm__ ASMCONST ( "bset %0,@%1\n" : : "i" (bit),"r" (byte))
 set a single bit in memory

#define bit_clear(byte, bit)   __asm__ ASMCONST ( "bclr %0,@%1\n" : : "i" (bit),"r" (byte))
 clear a single bit in memory

#define bit_load(mask, bit)   __asm__ ASMCONST ( "bld %0,%1l\n" : : "i" (bit),"r" (mask):"cc")
 load a single bit from a mask to the carry flag

#define bit_iload(mask, bit)   __asm__ ASMCONST ( "bild %0,%1l\n" : : "i" (bit),"r" (mask):"cc")
 load the inverse of a single bit from a mask to the carry flag

#define bit_store(byte, bit)   __asm__ ASMCONST ( "bst %0,@%1\n" : : "i" (bit),"r" (byte))
 store the carry flag to a single single bit in memory

Detailed Description

Internal Interface: H8/300 bit operations.

Author:
Markus L. Noga <markus@noga.de>

Definition in file bitops.h.

Define Documentation

#define ASMCONST   const
 

Definition at line 45 of file bitops.h.

#define bit_clear (  byte,
bit   )     __asm__ ASMCONST ( "bclr %0,@%1\n" : : "i" (bit),"r" (byte))
 

clear a single bit in memory

((char*)byte)&=~(1<<bit)

Definition at line 65 of file bitops.h.

Referenced by ds_passive(), and ds_rotation_off().

#define bit_iload (  mask,
bit   )     __asm__ ASMCONST ( "bild %0,%1l\n" : : "i" (bit),"r" (mask):"cc")
 

load the inverse of a single bit from a mask to the carry flag

carry=mask & inverse of (1<<bit)

Definition at line 77 of file bitops.h.

#define bit_load (  mask,
bit   )     __asm__ ASMCONST ( "bld %0,%1l\n" : : "i" (bit),"r" (mask):"cc")
 

load a single bit from a mask to the carry flag

carry=mask & (1<<bit)

Definition at line 71 of file bitops.h.

#define bit_set (  byte,
bit   )     __asm__ ASMCONST ( "bset %0,@%1\n" : : "i" (bit),"r" (byte))
 

set a single bit in memory

*((char*)byte)|=(1<<bit)

Definition at line 59 of file bitops.h.

Referenced by ds_active(), and ds_rotation_on().

#define bit_store (  byte,
bit   )     __asm__ ASMCONST ( "bst %0,@%1\n" : : "i" (bit),"r" (byte))
 

store the carry flag to a single single bit in memory

*((char*)byte)= ( (*((char*)byte)) & (~(1<<bit)) ) | (carry<<bit)

Definition at line 83 of file bitops.h.

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