Language Assembler (UDVM)
Date: | 04/20/05 |
Author: | Adam Roach |
URL: | n/a |
Comments: | 0 |
Info: | n/a |
Score: | (3.12 in 25 votes) |
; 99 Bottles of Beer on the Wall in UDVM assembly. ; ; See the developing IETF SigComp specification under development ; in the ROHC working group for a language reference. ; ; By Adam Roach <adam at who.net> at (64) :registers pad(8) :num_bottles pad(2) :digit pad(1) :digit_lsb pad(1) :tens_ascii pad(1) :ones_ascii pad(1) :bottles_of_beer pad(16) :on_the_wall pad(12) :lf pad(1) :take_one_down pad(30) ; Padding to make the strings come out an even length pad(1) ; Executable code must start on a 64-byte boundary align (64) :start ; Initialize variables. MULTILOAD (num_bottles, #, 99, 0, 14906, 8290,28532,29804,25971,8303,26144,25189,25970,8303,28192,29800,25888, 30561,27756,2676,24939,25888,28526,25888,25711,30574,11296,28769,29555, 8297,29728,24946,28533,28260,2560) :loop OUTPUT (tens_ascii, 31) ; "xx bottles of beer on the wall\n" OUTPUT (tens_ascii, 18) ; "xx bottles of beer" OUTPUT (lf, 31) ; "\ntake one down, pass it around\n" SUBTRACT ($num_bottles, 1) ; Compute the ASCII digit for the tens position LOAD (digit, $num_bottles) DIVIDE ($digit, 10) ADD ($digit, 48) COPY (digit_lsb, 1, tens_ascii) ; Compute the ASCII digit for the digits position LOAD (digit, $num_bottles) REMAINDER ($digit, 10) ADD ($digit, 48) COPY (digit_lsb, 1, ones_ascii) OUTPUT (tens_ascii, 31) ; "xx bottles of beer on the wall\n" COMPARE ($num_bottles, 0, finish, finish, loop) :finish ; Signal that we're complete, and store this code as state so ; that it can be referenced by a state identifier in the future. set (code_length, end - start) END-MESSAGE (0, 0, code_length, start, start, 6, 1) :end
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