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388 lines
11 KiB
C++
388 lines
11 KiB
C++
//
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// Minterms.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 20/09/2021.
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// Copyright © 2021 Thomas Harte. All rights reserved.
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//
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#ifndef Minterms_hpp
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#define Minterms_hpp
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namespace Amiga {
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/// @returns the result of applying the Amiga-format @c minterm to inputs @c a, @c b and @c c.
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template <typename IntT> IntT apply_minterm(IntT a, IntT b, IntT c, int minterm) {
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// Quick implementation notes:
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//
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// This was created very lazily. I tried to enter as many logical combinations of
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// a, b and c as I could think of and had a test program match them up to the
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// Amiga minterm IDs, prioritising by simplicity.
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//
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// That got me most of the way; starting from the point indicated below I had run
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// out of good ideas and automatically generated the rest.
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//
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switch(minterm) {
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default:
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case 0x00: return IntT(0);
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case 0xff: return IntT(~0);
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case 0xf0: return a;
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case 0xcc: return b;
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case 0xaa: return c;
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case 0x0f: return ~a;
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case 0x33: return ~b;
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case 0x55: return ~c;
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case 0xfc: return a | b;
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case 0xfa: return a | c;
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case 0xee: return b | c;
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case 0xfe: return a | b | c;
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case 0xf3: return a | ~b;
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case 0xf5: return a | ~c;
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case 0xdd: return b | ~c;
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case 0xfd: return a | b | ~c;
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case 0xfb: return a | ~b | c;
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case 0xf7: return a | ~b | ~c;
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case 0xcf: return ~a | b;
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case 0xaf: return ~a | c;
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case 0xbb: return ~b | c;
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case 0xef: return ~a | b | c;
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case 0xdf: return ~a | b | ~c;
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case 0x7f: return ~a | ~b | ~c;
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case 0x3c: return a ^ b;
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case 0x5a: return a ^ c;
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case 0x66: return b ^ c;
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case 0x96: return a ^ b ^ c;
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case 0xc3: return ~a ^ b;
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case 0xa5: return ~a ^ c;
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case 0x99: return ~b ^ c;
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case 0x69: return ~a ^ b ^ c;
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case 0xc0: return a & b;
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case 0xa0: return a & c;
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case 0x88: return b & c;
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case 0x80: return a & b & c;
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case 0x30: return a & ~b;
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case 0x50: return a & ~c;
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case 0x44: return b & ~c;
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case 0x0c: return ~a & b;
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case 0x0a: return ~a & c;
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case 0x22: return ~b & c;
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case 0x40: return a & b & ~c;
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case 0x20: return a & ~b & c;
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case 0x08: return ~a & b & c;
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case 0x10: return a & ~b & ~c;
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case 0x04: return ~a & b & ~c;
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case 0x02: return ~a & ~b & c;
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case 0x03: return ~a & ~b;
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case 0x05: return ~a & ~c;
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case 0x11: return ~b & ~c;
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case 0x01: return ~a & ~b & ~c;
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case 0x70: return a & ~(b & c);
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case 0x4c: return b & ~(a & c);
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case 0x2a: return c & ~(a & b);
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case 0x07: return ~a & ~(b & c);
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case 0x13: return ~b & ~(a & c);
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case 0x15: return ~c & ~(a & b);
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case 0xe0: return a & (b | c);
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case 0xc8: return b & (a | c);
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case 0xa8: return c & (a | b);
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case 0x0e: return ~a & (b | c);
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case 0x32: return ~b & (a | c);
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case 0x54: return ~c & (a | b);
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case 0x60: return a & (b ^ c);
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case 0x48: return b & (a ^ c);
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case 0x28: return c & (a ^ b);
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case 0x06: return ~a & (b ^ c);
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case 0x12: return ~b & (a ^ c);
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case 0x14: return ~c & (a ^ b);
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case 0x90: return a & ~(b ^ c);
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case 0x84: return b & ~(a ^ c);
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case 0x82: return c & ~(a ^ b);
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case 0x09: return ~a & ~(b ^ c);
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case 0x21: return ~b & ~(a ^ c);
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case 0x41: return ~c & ~(a ^ b);
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case 0xb0: return a & (~b | c);
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case 0xd0: return a & (b | ~c);
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case 0x0b: return ~a & (~b | c);
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case 0x0d: return ~a & (b | ~c);
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case 0xf6: return a | (b ^ c);
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case 0xde: return b | (a ^ c);
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case 0xbe: return c | (a ^ b);
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case 0x6f: return ~a | (b ^ c);
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case 0x7b: return ~b | (a ^ c);
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case 0x7d: return ~c | (a ^ b);
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case 0x9f: return ~a | ~(b ^ c);
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case 0xb7: return ~b | ~(a ^ c);
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case 0xd7: return ~c | ~(a ^ b);
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case 0xf8: return a | (b & c);
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case 0xec: return b | (a & c);
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case 0xea: return c | (a & b);
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case 0x8f: return ~a | (b & c);
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case 0xb3: return ~b | (a & c);
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case 0xd5: return ~c | (a & b);
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case 0xf1: return a | ~(b | c);
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case 0xcd: return b | ~(a | c);
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case 0xab: return c | ~(a | b);
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case 0x1f: return ~a | ~(b | c);
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case 0x37: return ~b | ~(a | c);
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case 0x57: return ~c | ~(a | b);
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case 0x8c: return b & (~a | c);
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case 0x8a: return c & (~a | b);
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case 0xc4: return b & (a | ~c);
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case 0xa2: return c & (a | ~b);
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case 0x78: return a ^ (b & c);
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case 0x6c: return b ^ (a & c);
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case 0x6a: return c ^ (a & b);
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case 0x87: return ~a ^ (b & c);
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case 0x93: return ~b ^ (a & c);
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case 0x95: return ~c ^ (a & b);
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case 0x1e: return a ^ (b | c);
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case 0x36: return b ^ (a | c);
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case 0x56: return c ^ (a | b);
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case 0x2d: return a ^ (b | ~c);
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case 0x4b: return a ^ (~b | c);
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case 0xe1: return a ^ ~(b | c);
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case 0x39: return b ^ (a | ~c);
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case 0x63: return b ^ (~a | c);
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case 0xc9: return b ^ ~(a | c);
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case 0x59: return c ^ (a | ~b);
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case 0x65: return c ^ (~a | b);
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case 0xa9: return c ^ ~(a | b);
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case 0x24: return (a ^ b) & (b ^ c);
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case 0x18: return (a ^ b) & (a ^ c);
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case 0x42: return (a ^ c) & (b ^ c);
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case 0xa6: return (a & b) ^ (b ^ c);
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case 0xc6: return (a & c) ^ (b ^ c);
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case 0x5c: return (a | b) ^ (a & c);
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case 0x74: return (a | b) ^ (b & c);
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case 0x72: return (a | c) ^ (b & c);
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case 0x4e: return (b | c) ^ (a & c);
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case 0x58: return (a | b) & (a ^ c);
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case 0x62: return (a | c) & (b ^ c);
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case 0x7e: return (a ^ b) | (a ^ c);
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case 0xca: return (a & b) | (~a & c);
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case 0xac: return (~a & b) | (a & c);
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case 0xa3: return (~a & ~b) | (a & c);
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case 0xf4: return a | ((a ^ b) & (b ^ c));
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case 0xf2: return a | ((a ^ c) & (b ^ c));
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case 0xdc: return b | ((a ^ b) & (a ^ c));
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case 0xce: return b | ((a ^ c) & (b ^ c));
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case 0xae: return c | ((a ^ b) & (b ^ c));
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case 0xba: return c | ((a ^ b) & (a ^ c));
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case 0x2f: return ~a | ((a ^ b) & (b ^ c));
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case 0x4f: return ~a | ((a ^ c) & (b ^ c));
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case 0x3b: return ~b | ((a ^ b) & (a ^ c));
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case 0x73: return ~b | ((a ^ c) & (b ^ c));
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case 0x75: return ~c | ((a ^ b) & (b ^ c));
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case 0x5d: return ~c | ((a ^ b) & (a ^ c));
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case 0x3f: return ~a | ~b | ((a ^ b) & (b ^ c));
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case 0x77: return ~b | ~c | ((a ^ b) & (b ^ c));
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case 0x27: return ~(a | b) | ((a ^ b) & (b ^ c));
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case 0x47: return ~(a | c) | ((a ^ c) & (b ^ c));
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case 0x53: return ~(b | c) | ((a ^ c) & (b ^ c));
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case 0x43: return ~(a | b | c) | ((a ^ c) & (b ^ c));
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case 0x7a: return (a & ~b) | (a ^ c);
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case 0x76: return (a & ~b) | (b ^ c);
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case 0x7c: return (a & ~c) | (a ^ b);
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case 0x5e: return (~a & b) | (a ^ c);
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case 0x6e: return (~a & b) | (b ^ c);
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case 0x3e: return (~a & c) | (a ^ b);
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case 0xad: return (~a & b) | ~(a ^ c);
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case 0xb5: return (a & ~b) | ~(a ^ c);
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case 0xcb: return (~a & c) | ~(a ^ b);
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case 0xd3: return (a & ~c) | ~(a ^ b);
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case 0x9b: return (~a & c) | ~(b ^ c);
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case 0xd9: return (a & ~c) | ~(b ^ c);
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case 0x9d: return (~a & b) | ~(b ^ c);
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case 0xb9: return (a & ~b) | ~(b ^ c);
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case 0x9e: return (~a & b) | (a ^ b ^ c);
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case 0xb6: return (a & ~b) | (a ^ b ^ c);
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case 0xd6: return (a & ~c) | (a ^ b ^ c);
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case 0xbf: return ~(a & b) | (a ^ b ^ c);
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case 0x6d: return (~a & b) | ~(a ^ b ^ c);
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case 0x79: return (a & ~b) | ~(a ^ b ^ c);
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case 0x6b: return (~a & c) | ~(a ^ b ^ c);
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case 0xe9: return (b & c) | ~(a ^ b ^ c);
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case 0xb8: return (a & ~b) | (c & b);
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case 0xd8: return (a & ~c) | (b & c);
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case 0xe4: return (b & ~c) | (a & c);
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case 0xe2: return (c & ~b) | (a & b);
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case 0x2c: return (~a & b) | ((a ^ b) & (b ^ c));
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case 0x34: return (a & ~b) | ((a ^ b) & (b ^ c));
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case 0x4a: return (~a & c) | ((a ^ c) & (b ^ c));
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case 0x52: return (a & ~c) | ((a ^ c) & (b ^ c));
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case 0x5f: return ~(a & c) | ((a ^ c) & (b ^ c));
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case 0x16: return (a & ~(c | b)) | (c & ~(b | a)) | (b & ~(a | c));
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case 0x81: return (a ^ ~(c | b)) & (c ^ ~(b | a)) & (b ^ ~(a | c));
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case 0x2e: return (~a & (b | c)) | (~b & c);
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case 0x3a: return (~b & (a | c)) | (~a & c);
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case 0x8b: return (~a & ~b) | (c & b);
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case 0x8d: return (~a & ~c) | (b & c);
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case 0xb1: return (~b & ~c) | (a & c);
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case 0xd1: return (~c & ~b) | (a & b);
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case 0x98: return (a & ~(c | b)) | (b & c);
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case 0x8e: return (~a & (c | b)) | (b & c);
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case 0x46: return (~a | b) & (b ^ c);
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case 0xe6: return ((~a | b) & (b ^ c)) ^ (a & c);
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case 0xc2: return ((a | ~b) & (b ^ c)) ^ (a & c);
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case 0x85: return (~a | b) & ~(a ^ c);
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case 0x83: return (~a | c) & ~(a ^ b);
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case 0x89: return (~a | c) & ~(b ^ c);
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case 0xa1: return (a | ~b) & ~(a ^ c);
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case 0x91: return (a | ~b) & ~(b ^ c);
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case 0xc1: return (a | ~c) & ~(a ^ b);
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case 0x94: return (a | b) & (a ^ b ^ c);
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case 0x86: return (b | c) & (a ^ b ^ c);
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case 0x92: return (a | c) & (a ^ b ^ c);
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case 0x68: return (a | b) & ~(a ^ b ^ c);
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case 0x61: return (a | ~b) & ~(a ^ b ^ c);
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case 0x49: return (~a | b) & ~(a ^ b ^ c);
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case 0x29: return (~a | c) & ~(a ^ b ^ c);
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case 0x64: return (a & ~b & c) | (b & ~c);
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//
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// From here downwards functions were found automatically.
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// Neater versions likely exist of many of the functions below.
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//
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case 0xe8: return (a & b) | ((b | a) & c);
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case 0xd4: return (a & b) | ((b | a) & ~c);
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case 0xb2: return (a & ~b) | ((~b | a) & c);
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case 0x17: return (~a & ~b) | ((~b | ~a) & ~c);
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case 0x1b: return (~a & ~b) | (~b & ~c) | (~a & c);
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case 0x1d: return (~a & b) | ((~b | ~a) & ~c);
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case 0x2b: return (~a & ~b) | ((~b | ~a) & c);
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case 0x35: return (a & ~b) | ((~b | ~a) & ~c);
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case 0x4d: return (~a & b) | ((b | ~a) & ~c);
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case 0x71: return (a & ~b) | ((~b | a) & ~c);
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case 0xbd: return (~a & b) | (~b & ~c) | (a & c);
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case 0xc5: return (a & b) | ((b | ~a) & ~c);
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case 0xdb: return (a & b) | (~b & ~c) | (~a & c);
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case 0xe7: return (~a & ~b) | (b & ~c) | (a & c);
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case 0x1c: return (~a & b) | (a & ~b & ~c);
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case 0x23: return (~a & ~b) | (a & ~b & c);
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case 0x31: return (a & ~b) | (~a & ~b & ~c);
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case 0x38: return (a & ~b) | (~a & b & c);
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case 0x1a: return (~a & c) | (a & ~b & ~c);
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case 0x25: return (~a & ~c) | (a & ~b & c);
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case 0x45: return (~a & ~c) | (a & b & ~c);
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case 0x51: return (a & ~c) | (~a & ~b & ~c);
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case 0xa4: return (a & c) | (~a & b & ~c);
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case 0x19: return (~b & ~c) | (~a & b & c);
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case 0x26: return (~b & c) | (~a & b & ~c);
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case 0xc7: return (a & b) | (~a & (~b | ~c));
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case 0x3d: return (a & ~b) | (~a & (b | ~c));
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case 0xbc: return (~a & b) | (a & (~b | c));
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case 0xe3: return (~a & ~b) | (a & (b | c));
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case 0xa7: return (a & c) | (~a & (~b | ~c));
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case 0x5b: return (a & ~c) | (~a & (~b | c));
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case 0xda: return (~a & c) | (a & (b | ~c));
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case 0xe5: return (~a & ~c) | (a & (b | c));
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case 0x67: return (~a & ~b) | ((~a | b) & ~c) | (~b & c);
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case 0x97: return (~a & ~b) | ((~a | ~b) & ~c) | (a & b & c);
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case 0xb4: return (a & ~b) | (a & c) | (~a & b & ~c);
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case 0x9c: return (~a & b) | (b & c) | (a & ~b & ~c);
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case 0xd2: return ((~c | b) & a) | (~a & ~b & c);
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case 0x9a: return ((~a | b) & c) | (a & ~b & ~c);
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case 0xf9: return a | (~b & ~c) | (b & c);
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case 0xed: return b | (~a & ~c) | (a & c);
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case 0xeb: return c | (~a & ~b) | (a & b);
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}
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// Should be unreachable.
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return 0;
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}
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}
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#endif /* Minterms_hpp */
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