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decoder seems to be working, need to make a serializer next.

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ed
2026-09-09 01:50:20 -04:00
parent 5e6e139cc0
commit 6cca3fbe8b
7 changed files with 116 additions and 67 deletions
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code/8086/decoder.h
+34 -28
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@@ -12,25 +12,30 @@ enum {
};
typedef Enum_(U2, X8616_DecodedOperandFlags) {
x8616_decoded_operand_none = 0b0000000000000000,
x8616_decoded_operand_register = 0b0000000000000001,
x8616_decoded_operand_segment = 0b0000000000000010,
x8616_decoded_operand_memory = 0b0000000000000100,
x8616_decoded_operand_immediate = 0b0000000000001000,
x8616_decoded_operand_relative = 0b0000000000010000,
x8616_decoded_operand_far_ptr = 0b0000000000100000,
x8616_decoded_operand_direct = 0b0000000001000000,
x8616_decoded_operand_sign_extended = 0b0000000010000000,
x8616_decoded_operand_implicit = 0b0000000100000000,
Bit_(x8616_decoded_operand_none, 0),
Bit_(x8616_decoded_operand_register, 1),
Bit_(x8616_decoded_operand_segment, 2),
Bit_(x8616_decoded_operand_memory, 3),
Bit_(x8616_decoded_operand_immediate, 4),
Bit_(x8616_decoded_operand_relative, 5),
Bit_(x8616_decoded_operand_far_ptr, 6),
Bit_(x8616_decoded_operand_direct, 7),
Bit_(x8616_decoded_operand_sign_extended, 8),
Bit_(x8616_decoded_operand_implicit, 9),
};
typedef Union_(X8616_DecodedReg) {
X8616_Reg8 r8;
X8616_Reg16 r16;
};
typedef Struct_(X8616_DecodedOperand) {
X8616_DecodedOperandFlags flags;
X8616_WidthMode width;
U1 reg;
U1 segment;
U1 mod;
U1 ea;
X8616_DecodedReg reg;
X8616_Segment segment;
X8616_Mod mod;
X8616_EA ea;
S2 displacement;
U2 address;
U2 immediate;
@@ -64,26 +69,27 @@ typedef Struct_(X8616_DecodedInstruction) {
X8616_DecodedPrefixes prefixes;
X8616_DecodedOperand operands[2];
U1 operand_count;
U1 opcode;
U1 mod_rm;
X8616_OpcodePrefix opcode;
X8616_Direction d;
X8616_Width w;
B1 has_mod_rm;
U1 size;
U1 size_required;
};
typedef Enum_(U2, X8616_DecodePlanFlags) {
x8616_plan_none = 0b0000000000000000,
x8616_plan_has_modrm = 0b0000000000000001,
x8616_plan_has_post_opcode = 0b0000000000000010,
x8616_plan_has_d = 0b0000000000000100,
x8616_plan_has_w = 0b0000000000001000,
x8616_plan_has_s = 0b0000000000010000,
x8616_plan_has_v = 0b0000000000100000,
x8616_plan_has_z = 0b0000000001000000,
x8616_plan_has_reg = 0b0000000010000000,
x8616_plan_has_sr = 0b0000000100000000,
x8616_plan_uses_rm = 0b0000001000000000,
x8616_plan_is_prefix = 0b0000010000000000,
Bit_(x8616_plan_none, 0),
Bit_(x8616_plan_has_modrm, 1),
Bit_(x8616_plan_has_post_opcode, 2),
Bit_(x8616_plan_has_d, 3),
Bit_(x8616_plan_has_w, 4),
Bit_(x8616_plan_has_s, 5),
Bit_(x8616_plan_has_v, 6),
Bit_(x8616_plan_has_z, 7),
Bit_(x8616_plan_has_reg, 8),
Bit_(x8616_plan_has_sr, 9),
Bit_(x8616_plan_uses_rm, 10),
Bit_(x8616_plan_is_prefix, 11),
};
typedef Enum_(U1, X8616_DecodePayload) {