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bit op macros (mpw)

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Kelvin Sherlock 2014-03-11 22:12:13 -04:00
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;implement the 16 bit operations.
;
; works for 16 or 8-bit accumulator.
;
;
; see:
; http://jacob.jkrall.net/lost-operator/
; TAOCP 4A Part 1, pp 49
;
; 1 & 1 -> 1
; 1 & 0 -> 0
; 0 & 1 -> 0
; 0 & 0 -> 0
; ~1 & 1 -> 0
; ~1 & 0 -> 0
; ~0 & 1 -> 1
; ~0 & 0 -> 0
; 1 & ~1 -> 0
; 1 & ~0 -> 1
; 0 & ~1 -> 0
; 0 & ~0 -> 0
; ~1 & ~1 -> 0
; ~1 & ~0 -> 0
; ~0 & ~1 -> 0
; ~0 & ~0 -> 1
; 1 | 1 -> 1
; 1 | 0 -> 1
; 0 | 1 -> 1
; 0 | 0 -> 0
; ~1 | 1 -> 1
; ~1 | 0 -> 0
; ~0 | 1 -> 1
; ~0 | 0 -> 1
; 1 | ~1 -> 1
; 1 | ~0 -> 1
; 0 | ~1 -> 0
; 0 | ~0 -> 1
; ~1 | ~1 -> 0
; ~1 | ~0 -> 1
; ~0 | ~1 -> 1
; ~0 | ~0 -> 1
; 1 ^ 1 -> 0
; 1 ^ 0 -> 1
; 0 ^ 1 -> 1
; 0 ^ 0 -> 0
; ~1 ^ 1 -> 1
; ~1 ^ 0 -> 0
; ~0 ^ 1 -> 0
; ~0 ^ 0 -> 1
; 1 ^ ~1 -> 1
; 1 ^ ~0 -> 0
; 0 ^ ~1 -> 0
; 0 ^ ~0 -> 1
MACRO
bit_false &p, &q
; boolean op #0
;
; f(1,1) -> 0
; f(1,0) -> 0
; f(0,1) -> 0
; f(0,0) -> 0
; aka constant false
lda #0
MEND
MACRO
bit_nor &p, &q
; boolean op #1
;
; f(1,1) -> 0
; f(1,0) -> 0
; f(0,1) -> 0
; f(0,0) -> 1
; aka ~p & ~q
; aka ~(p | q)
lda &p
ora &q
eor #-1
MEND
MACRO
bit_lt &p, &q
; boolean op #2
;
; f(1,1) -> 0
; f(1,0) -> 0
; f(0,1) -> 1
; f(0,0) -> 0
; aka p < q
; aka ~p & q
lda &p
eor #-1
and &q
MEND
MACRO
bit_not_p &p, &q
; boolean op #3
;
; f(1,1) -> 0
; f(1,0) -> 0
; f(0,1) -> 1
; f(0,0) -> 1
; aka ~p
lda &p
eor #-1
MEND
MACRO
bit_gt &p, &q
; boolean op #4
;
; f(1,1) -> 0
; f(1,0) -> 1
; f(0,1) -> 0
; f(0,0) -> 0
; aka p > q
; aka p & ~q
lda &q
eor #-1
and &p
MEND
MACRO
bit_not_q &p, &q
; boolean op #5
;
; f(1,1) -> 0
; f(1,0) -> 1
; f(0,1) -> 0
; f(0,0) -> 1
; aka ~q
lda &q
eor #-1
MEND
MACRO
bit_xor &p, &q
; boolean op #6
;
; f(1,1) -> 0
; f(1,0) -> 1
; f(0,1) -> 1
; f(0,0) -> 0
; aka p != q
; aka p ^ q
lda &p
eor &q
MEND
MACRO
bit_ne &p, &q
; alternate name for boolean op #6
bit_xor &p, &q
MEND
MACRO
bit_nand &p, &q
; boolean op #7
;
; f(1,1) -> 0
; f(1,0) -> 1
; f(0,1) -> 1
; f(0,0) -> 1
; aka ~p | ~q
; aka ~(p & q)
lda &p
and &q
eor #-1
MEND
MACRO
bit_and &p, &q
; boolean op #8
;
; f(1,1) -> 1
; f(1,0) -> 0
; f(0,1) -> 0
; f(0,0) -> 0
; aka p & q
lda &p
and &q
MEND
MACRO
bit_eq &p, &q
; boolean op #9
;
; f(1,1) -> 1
; f(1,0) -> 0
; f(0,1) -> 0
; f(0,0) -> 1
; aka p = q
; aka ~(p ^ q)
lda &p
eor &q
eor #-1
MEND
MACRO
bit_q &p, &q
; boolean op #10
;
; f(1,1) -> 1
; f(1,0) -> 0
; f(0,1) -> 1
; f(0,0) -> 0
; aka q
lda &q
MEND
MACRO
bit_le &p, &q
; boolean op #11
;
; f(1,1) -> 1
; f(1,0) -> 0
; f(0,1) -> 1
; f(0,0) -> 1
; aka p implies q
; aka p <= q
; aka ~p | q
lda &p
eor #-1
ora &q
MEND
MACRO
bit_p &p, &q
; boolean op #12
;
; f(1,1) -> 1
; f(1,0) -> 1
; f(0,1) -> 0
; f(0,0) -> 0
; aka p
lda &p
MEND
MACRO
bit_ge &p, &q
; boolean op #13
;
; f(1,1) -> 1
; f(1,0) -> 1
; f(0,1) -> 0
; f(0,0) -> 1
; aka p >= q
; aka p | ~q
lda &q
eor #-1
ora &p
MEND
MACRO
bit_or &p, &q
; boolean op #14
;
; f(1,1) -> 1
; f(1,0) -> 1
; f(0,1) -> 1
; f(0,0) -> 0
; aka p | q
lda &p
ora &q
MEND
MACRO
bit_true &p, &q
; boolean op #15
;
; f(1,1) -> 1
; f(1,0) -> 1
; f(0,1) -> 1
; f(0,0) -> 1
lda #-1
MEND