Bit

These take a pointer to a bit field.
Bt:     Bit Test
Bts:    Bit Test and Set to one
Btr:    Bit Test and Rst to zero
Btc:    Bit Test and Compliment (toggle)
BEqu:   Set bit to value.

Bit operations are "atomic", no interrupt between the reading and writing the 
bit, important when multitasking.  For multicore use "locked" forms.

These don't take a pointer, but the actual field.
Bsf:    Bit Scan Fwd (Pos of first low one bit or -1)
Bsr:    Bit Scan Rev (Pos of first high one bit or -1)
BCnt:   Bit Cnt (Cnt of set bits)

BCnt                Funct Count set bits in I64.
BEqu                Funct Set bit equ to val.
BFieldExtU32        Funct Extract U32 from bit field.
BFieldOrU32         Funct Or U32 into bit field.
Bsf                 Funct Scan fwd from lowest for 1st set. -1 if not found.
Bsr                 Funct Scan rev from highest for 1st set. -1 if not found.
Bt                  Funct Bit test.
Btc                 Funct Bit test and complement (same as xor with 1).
Btr                 Funct Bit test and reset to zero.
Bts                 Funct Bit test and set to one.
LBEqu               Funct Locked Set bit equ to val.
LBtc                Funct Locked bit test and complement (xor with 1).
LBtr                Funct Locked bit test and reset to zero.
LBts                Funct Locked bit test and set to one.
rev_bits_table      GlbVar Table with U8 bits revd
set_bits_table      GlbVar Table with count of set bits in a U8