| 1 | #!/usr/bin/perl |
| 2 | use v5.14; |
| 3 | use warnings; |
| 4 | use lib '.'; |
| 5 | |
| 6 | use asm; |
| 7 | |
| 8 | sub update_leds { |
| 9 | my ($x) = @_; |
| 10 | route $x + 0, $x + 1, 4; |
| 11 | route $x + 1, $x + 2, 3; |
| 12 | route $x + 2, $x + 3, 2; |
| 13 | route $x + 3, $x + 4, 1; |
| 14 | } |
| 15 | |
| 16 | sub xori { |
| 17 | my ($addrA, $imm, $addrC) = @_; |
| 18 | storei 42, $imm; |
| 19 | xor_ $addrA, 42, $addrC; |
| 20 | } |
| 21 | |
| 22 | sub andi { |
| 23 | my ($addrA, $imm, $addrC) = @_; |
| 24 | storei 42, $imm; |
| 25 | and_ $addrA, 42, $addrC; |
| 26 | } |
| 27 | |
| 28 | # we want everyone to have |
| 29 | # |
| 30 | # own quadrant at mem[0] |
| 31 | # east quadrant at mem[11] |
| 32 | # south quadrant at mem[12] |
| 33 | # SE quadrant at mem[13] |
| 34 | |
| 35 | my $q_east = 11; |
| 36 | my $q_south = 12; |
| 37 | my $q_SE = 13; |
| 38 | |
| 39 | chip_select 4, sub { storei 0, 0x247 }; # glider |
| 40 | chip_select $_, sub { ledi $_ } for 1, 2, 4, 8; |
| 41 | |
| 42 | |
| 43 | update_leds 0; |
| 44 | |
| 45 | chip_select 1, sub { route 0, 11 }; |
| 46 | chip_select 2, sub { route 11, 12 }; |
| 47 | chip_select 4, sub { route 12, 13 }; |
| 48 | |
| 49 | chip_select 2, sub { route 0, 13 }; |
| 50 | chip_select 4, sub { route 13, 12 }; |
| 51 | chip_select 8, sub { route 12, 11 }; |
| 52 | |
| 53 | chip_select 4, sub { route 0, 11 }; |
| 54 | chip_select 8, sub { route 11, 12 }; |
| 55 | chip_select 1, sub { route 12, 13 }; |
| 56 | |
| 57 | chip_select 8, sub { route 0, 13 }; |
| 58 | chip_select 1, sub { route 13, 12 }; |
| 59 | chip_select 2, sub { route 12, 11 }; |
| 60 | |
| 61 | |
| 62 | sub news_to_mem { |
| 63 | my ($dir, $mem) = @_; |
| 64 | alu3 alu_zero, alu_select_f, 0, 0, $mem, flag_news($dir), flag_zero |
| 65 | } |
| 66 | |
| 67 | my $and_AB = alu_of_function { $a & $b }; |
| 68 | |
| 69 | sub compute_neighbour { |
| 70 | my ($dest, $dir, $mask, $other) = @_; |
| 71 | storei $dest, $mask; |
| 72 | alu3 $and_AB, $and_AB, 0, $dest, $dest, flag_zero, flag_zero; |
| 73 | news_to_mem $dir, $dest; |
| 74 | |
| 75 | storei $dest + 1, 0xFFFF - $mask; |
| 76 | alu3 $and_AB, $and_AB, $other, $dest + 1, $dest + 1, flag_zero, flag_zero; |
| 77 | alu3 alu_zero, alus_addAF, $dest, 0, $dest, flag_news($dir), flag_zero |
| 78 | } |
| 79 | |
| 80 | # N neighbour |
| 81 | compute_neighbour 1, 0, 0x0FFF, $q_south; |
| 82 | # E neighbour |
| 83 | compute_neighbour 2, 1, 0xEEEE, $q_east; |
| 84 | # S neighbour |
| 85 | compute_neighbour 3, 2, 0xFFF0, $q_south; |
| 86 | # W neighbour |
| 87 | compute_neighbour 4, 3, 0x7777, $q_east; |
| 88 | |
| 89 | sub compute_diagonal_neighbour { |
| 90 | my ($dest, $dir, @masks) = @_; |
| 91 | die 'expected exactly 4 @masks' unless @masks == 4; |
| 92 | storei $dest, $masks[0]; |
| 93 | alu3 $and_AB, alu_select_a, 0, $dest, 0, flag_zero, flag_zero; |
| 94 | news_to_mem $dir, $dest; |
| 95 | |
| 96 | for my $quad (1 .. 3) { |
| 97 | storei $dest + 1, $masks[$quad]; |
| 98 | alu3 $and_AB, alu_select_a, 10 + $quad, $dest + 1, 10 + $quad, flag_zero, flag_zero; |
| 99 | alu3 alu_zero, alus_addAF, $dest, 0, $dest, flag_news($dir), flag_zero; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | #update_leds $q_SE; |
| 104 | |
| 105 | # NW neighbour |
| 106 | compute_diagonal_neighbour 5, 4, 0x0777, 0x0888, 0x7000, 0x8000; |
| 107 | #update_leds 5; |
| 108 | # NE neighbour |
| 109 | compute_diagonal_neighbour 6, 5, 0x0EEE, 0x0111, 0xE000, 0x1000; |
| 110 | #update_leds 6; |
| 111 | # SE neighbour |
| 112 | compute_diagonal_neighbour 7, 6, 0xEEE0, 0x1110, 0x000E, 0x0001; |
| 113 | #update_leds 7; |
| 114 | # SW neighbour (DODGY) |
| 115 | compute_diagonal_neighbour 8, 7, 0x7770, 0x8880, 0x0007, 0x0008; |
| 116 | #update_leds 8; |
| 117 | |
| 118 | sub flag_to_memory { |
| 119 | my ($address, $flag) = @_; |
| 120 | alu3 alu_zero, alu_select_f, 0, 0, $address, $flag, flag_zero; |
| 121 | } |
| 122 | |
| 123 | # now we add bits mem[1] .. mem[8] |
| 124 | # result should be mem[1] .. mem[3] (we don't distinguish 8 from 0) |
| 125 | my $F = 1; |
| 126 | |
| 127 | # add 1 and 2, 3 and 4, 5 and 6, 7 and 8 |
| 128 | for my $x (1, 3, 5, 7) { |
| 129 | add $x, $x + 1, $x, $F; |
| 130 | flag_to_memory $x + 1, $F; |
| 131 | } |
| 132 | |
| 133 | # add 12 and 34, 56 and 78 |
| 134 | for my $x (1, 5) { |
| 135 | add $x, $x + 2, $x, $F; |
| 136 | addC $x + 1, $x + 3, $x + 1, $F; |
| 137 | flag_to_memory $x + 2, $F; |
| 138 | } |
| 139 | |
| 140 | # add 12 and 56 |
| 141 | add 1, 5, 1, $F; |
| 142 | addC 2, 6, 2, $F; |
| 143 | # F = F | 3 | 7 |
| 144 | alu3 alu_or, alu_select_a, 3, 7, 3, $F, $F; |
| 145 | |
| 146 | # should a new cell be born here? (do we have 3 neighbours?) |
| 147 | sub alu_birth { alu_of_function {; $a && $b && !$_ } } |
| 148 | |
| 149 | # should a living cell survive here? (do we have 2 or 3 neighbours?) |
| 150 | sub alu_survival { alu_of_function {; $a && !$_ } } |
| 151 | |
| 152 | # compute the state of this cell at the next tick |
| 153 | sub alu_step { alu_of_function {; $_ & ($a | $b) } } |
| 154 | |
| 155 | # read from memory 1, and with memory 2 and not F, write into memory 1 (= birth-p) |
| 156 | alu3 alu_zero, alu_birth, 1, 2, 1, $F, flag_zero; |
| 157 | # read from memory 2, and with flag not F, write into flag F (= survive-p) |
| 158 | alu3 alu_survival, alu_select_a, 2, 0, 2, $F, $F; |
| 159 | # read from memory 0, memory 1, and flag F, write F and (mem0 or mem1) into memory 0 |
| 160 | alu3 alu_zero, alu_step, 0, 1, 0, $F, $F; # also zeroes out flag F |