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Replace Bt, Btr, Bts compiler _interns temporarily with function implementations.

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TomAwezome 2022-10-16 01:57:30 -04:00
parent fa73da4be1
commit 5ec66b9dad
1 changed files with 39 additions and 3 deletions
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42
src/Kernel/KernelB.HH
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@ -8,10 +8,46 @@ $LK,"KernelB",A="FF:::/StartOS.ZC,KernelB"$ StartOS.ZC
#help_file "::/Doc/Bit" #help_file "::/Doc/Bit"
public _intern IC_BSF I64 Bsf(I64 bit_field_val); //Scan forward from lowest for 1st set. -1 if not found. public _intern IC_BSF I64 Bsf(I64 bit_field_val); //Scan forward from lowest for 1st set. -1 if not found.
public _intern IC_BSR I64 Bsr(I64 bit_field_val); //Scan rev from highest for 1st set. -1 if not found. public _intern IC_BSR I64 Bsr(I64 bit_field_val); //Scan rev from highest for 1st set. -1 if not found.
public _intern IC_BT Bool Bt( U8 *bit_field, I64 bit); //Bit test. //public _intern IC_BT Bool Bt( U8 *bit_field, I64 bit); //Bit test.
public _intern IC_BTC Bool Btc( U8 *bit_field, I64 bit); //Bit test and complement (same as xor with 1). public _intern IC_BTC Bool Btc( U8 *bit_field, I64 bit); //Bit test and complement (same as xor with 1).
public _intern IC_BTR Bool Btr( U8 *bit_field, I64 bit); //Bit test and reset to zero. //public _intern IC_BTR Bool Btr( U8 *bit_field, I64 bit); //Bit test and reset to zero.
public _intern IC_BTS Bool Bts( U8 *bit_field, I64 bit); //Bit test and set to one. //public _intern IC_BTS Bool Bts( U8 *bit_field, I64 bit); //Bit test and set to one.
// TODO FIXME DEBUG: fix ICBitOps bugs when using on bare metal into PCI device memory-mapped areas
Bool Bt(U8 *bit_field, I64 bit)
{
U32 *chunk = bit_field;
chunk += (bit / 32);
U64 chunk_bit = 1 << (bit % 32);
return (*chunk & chunk_bit) >> (bit % 32);
}
Bool Btr(U8 *bit_field, I64 bit)
{
U32 *chunk = bit_field;
chunk += (bit / 32);
U64 chunk_bit = 1 << (bit % 32);
Bool result = (*chunk & chunk_bit) >> (bit % 32);
*chunk &= ~(chunk_bit);
return result;
}
Bool Bts(U8 *bit_field, I64 bit)
{
U32 *chunk = bit_field;
chunk += (bit / 32);
U64 chunk_bit = 1 << (bit % 32);
Bool result = (*chunk & chunk_bit) >> (bit % 32);
*chunk |= chunk_bit;
return result;
}
public _intern IC_LBTC Bool LBtc( U8 *bit_field, I64 bit); //Locked bit test and complement (xor with 1). public _intern IC_LBTC Bool LBtc( U8 *bit_field, I64 bit); //Locked bit test and complement (xor with 1).
public _intern IC_LBTR Bool LBtr( U8 *bit_field, I64 bit); //Locked bit test and reset to zero. public _intern IC_LBTR Bool LBtr( U8 *bit_field, I64 bit); //Locked bit test and reset to zero.
public _intern IC_LBTS Bool LBts( U8 *bit_field, I64 bit); //Locked bit test and set to one. public _intern IC_LBTS Bool LBts( U8 *bit_field, I64 bit); //Locked bit test and set to one.