checkpoint

1 files changed, 70 insertions, 0 deletions

diff --git a/archived/less_old_sim8086/code/sim8086.h b/archived/less_old_sim8086/code/sim8086.h
new file mode 100644
index 0000000..136fcfe
--- /dev/null
+++ b/archived/less_old_sim8086/code/sim8086.h
@@ -0,0 +1,70 @@
+/* date = May 13th 2025 11:06 pm */
+
+#ifndef SIM8086_H
+#define SIM8086_H
+
+typedef uint64_t u64;
+typedef uint32_t u32;
+typedef uint16_t u16;
+typedef uint8_t  u8;
+typedef int64_t  s64;
+typedef int32_t  s32;
+typedef int16_t  s16;
+typedef int8_t   s8;
+typedef s32      b32;
+typedef float    r32;
+typedef double   r64;
+#define false    0
+#define true     1
+
+#define global_variable static
+#define internal static
+#define local_persist static
+
+struct instruction_byte
+{
+    // NOTE(luca): All byte positions are 1-based so that 0 can mean that you do not have to test for this byte.
+    u8 Op;
+    u8 OpMask;
+    u8 SubOpMask;
+    u8 WBitAt;
+    u8 SBitAt;
+    u8 DBitAt;
+    u8 VBitAt;
+    u8 ModBitsAt;
+    u8 RegBitsAt;
+    u8 RMBitsAt;
+};
+struct sub_instruction
+{
+    u8 Op;
+    char *Name;
+};
+struct instruction
+{
+    char *Name;
+    char *Description;
+    u32 OperandsCount;
+    b32 HasSegmentRegister;
+    b32 HasImmediate;
+    b32 HasAddress;
+    b32 IsByteJump;
+    b32 ToAccumulator;
+    b32 FlipOperands;
+    
+    u32 BytesCount;
+    instruction_byte Bytes[8];
+    
+    // NOTE(luca): Sub instructions are instructions which do the same work but can have different names depending on a second opcode.
+    u32 SubInstructionsCount;
+    sub_instruction SubInstructions[8];
+};
+
+struct instruction_table
+{
+    instruction *Instructions;
+    u32 Count;
+    u32 Size;
+};
+
+#endif //SIM8086_H