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added instruction functionality

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zanostro 2025-11-11 21:51:15 +01:00
parent 483a16c194
commit d4754a048d
9 changed files with 754 additions and 170 deletions
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38
simulator_SIC_XE/include/constants.h Normal file
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#ifndef CONSTANTS_H
#define CONSTANTS_H
// ==============================
// SIC/XE Architecture Constants
// ==============================
// Memory and system constants
constexpr int MEMORY_SIZE = 65536;
constexpr int NUM_DEVICES = 256;
constexpr int WORD_SIZE = 24;
constexpr int WORD_MASK = 0xFFFFFF;
// SIC/XE floating point constants
constexpr int SICF_BITS = 48;
constexpr int SICF_FRAC_BITS = 40;
constexpr int SICF_EXP_BITS = 7;
constexpr int SICF_EXP_BIAS = 64;
constexpr unsigned long long SICF_FRAC_MASK = (1ULL << SICF_FRAC_BITS) - 1;
// SW register condition codes
constexpr int CC_LT = 0x0; // 00
constexpr int CC_EQ = 0x1; // 01
constexpr int CC_GT = 0x2; // 10
constexpr int CC_MASK = 0x3; // mask for 2 bits
// Instruction format bit masks
constexpr int TYPE3_4_SIC_MASK = 0xFC;
constexpr int NI_MASK = 0x03; // mask for n and i bits
constexpr int NI_SIC = 0x0;
constexpr int BP_BASE_REL_MASK = 0b10;
constexpr int BP_PC_REL_MASK = 0b01;
constexpr int BP_DIRECT_MASK = 0b00;
constexpr int BIT_E_MASK = 0x10; // mask for e bit in F4 and F3 instructions
#endif // CONSTANTS_H