d6
/
nxu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

clean up comments

This commit is contained in:
~d6 2021-12-28 21:16:21 -05:00
parent 4b4b2b5ff2
commit 497f297877
2 changed files with 50 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
math32.tal
View File

@ -1,14 +1,58 @@
( math32.tal )
( )
( This library supports arithmetic on 32-bit unsigned integers. )
( 32-bit integers are represented by two 16-bit integers )
( x** means xhi* xlo* )
( This library supports arithmetic on 32-bit unsigned integers, )
( also known as long values. )
( )
( 32-bit long values are represented by two 16-bit short values: )
( )
( decimal hexadecimal uxn literals )
( 0 0x00000000 #0000 #0000 )
( 1 0x00000001 #0000 #0001 )
( 4660 0x00001234 #0000 #1234 )
( 65535 0x0000ffff #0000 #ffff )
( 65536 0x00010000 #0001 #0000 )
( 16777215 0x00ffffff #00ff #ffff )
( 4294967295 0xffffffff #ffff #ffff )
( )
( The most significant 16-bit, the "high bits", are stored first. )
( We document long values as x** -- equivalent to xhi* xlo*. )
( )
( Operations supported: )
( )
( - add32 x** y** -> z** [x + y] )
( - sub32 x** y** -> z** [x - y] )
( - mul16 x* y* -> z** [x * y] )
( - mul32 x** y** -> z** [x * y] )
( - div32 x** y** -> z** [x / y] )
( - negate32 x** -> z** [-x] )
( - left-shift x** n^ -> z** [x<<n] )
( - right-shift x** n^ -> z** [x>>n] )
( - and32 x** y** -> z** [x & y] )
( - or32 x** y** -> z** [x | y] )
( - xor32 x** y** -> z** [x ^ y] )
( - complement32 x** -> z** [~x] )
( - eq32 x** y** -> bool^ [x == y] )
( - ne32 x** y** -> bool^ [x != y] )
( - is-zero32 x** -> bool^ [x == 0] )
( - non-zero32 x** -> bool^ [x != 0] )
( - lt32 x** y** -> bool^ [x < y] )
( - gt32 x** y** -> bool^ [x > y] )
( - lteq32 x** y** -> bool^ [x <= y] )
( - gteq32 x** y** -> bool^ [x >= y] )
( - bitcount x** -> bool^ log2+1 )
( )
( In addition to the code this file uses 44 bytes of registers )
( to store temporary state: )
( )
( - shared memory, 16 bytes )
( - mul32 memory, 12 bytes )
( - div32 memory, 16 bytes )
%DEBUG { #ff #0e DEO }
%RTN { JMP2r }
%TOR { ROT ROT } ( a b c -> c a b )
%TOR2 { ROT2 ROT2 }
%COMPLEMENT32 { SWP2 #ffff EOR2 SWP2 #ffff EOR2 } )
%COMPLEMENT32 { SWP2 #ffff EOR2 SWP2 #ffff EOR2 }
( bitcount: number of bits needed to represent number )
( equivalent to floor[log2[x]] + 1 )

4
test-math32.tal
View File

@ -2,7 +2,7 @@
( )
( methods for testing math32 and emitting output )
%EMIT { #18 DEO } )
%EMIT { #18 DEO }
%DIGIT { #00 SWP ;digits ADD2 LDA EMIT }
%SPACE { #20 EMIT }
%NEWLINE { #0a EMIT }
@ -28,7 +28,7 @@
#57 ,&lo JMP &lo-digit #30
&lo SUB SWP
( higher char ))
( higher char )
DUP #3a LTH ,&hi-digit JCN
#57 ,&hi JMP &hi-digit #30
&hi SUB #40 SFT ORA