1 files changed, 79 insertions, 0 deletions
diff --git a/lib/x86/dis-tables.h b/lib/x86/dis-tables.h
new file mode 100644
index 0000000..982c824
--- /dev/null
+++ b/lib/x86/dis-tables.h
@@ -0,0 +1,79 @@
+#pragma once
+#include <stdlib.h>
+/*
+prefixes REX opc ModR/M SIB displacement immediate
+
+1A/C: modrm stuff
+i64: 32 only
+o64: 64 only
+
+CDEGMNPQRSUVW: modrm
+EMQW: modrm w/ address
+IJO: immediate
+L: 8-bit immediate
+
+a Two one-word operands in memory or two double-word operands in memory, depending on operand-size attribute (used only by the BOUND instruction).
+b Byte, regardless of operand-size attribute.
+c Byte or word, depending on operand-size attribute.
+d Doubleword, regardless of operand-size attribute.
+dq Double-quadword, regardless of operand-size attribute.
+p 32-bit, 48-bit, or 80-bit pointer, depending on operand-size attribute.
+pd 128-bit or 256-bit packed double-precision floating-point data. pi Quadword MMX technology register (for example: mm0).
+ps 128-bit or 256-bit packed single-precision floating-point data. q Quadword, regardless of operand-size attribute.
+qq Quad-Quadword (256-bits), regardless of operand-size attribute. s 6-byte or 10-byte pseudo-descriptor.
+sd Scalar element of a 128-bit double-precision floating data.
+ss Scalar element of a 128-bit single-precision floating data.
+si Doubleword integer register (for example: eax).
+v Word, doubleword or quadword (in 64-bit mode), depending on operand-size attribute.
+w Word, regardless of operand-size attribute.
+x dq or qq based on the operand-size attribute.
+y Doubleword or quadword (in 64-bit mode), depending on operand-size attribute.
+z Word for 16-bit operand-size or doubleword for 32 or 64-bit operand-size.
+
+*/
+#define REP4(x) x, x, x, x
+#define REP8(x) REP4(x), REP4(x)
+#define REP16(x) REP8(x), REP8(x)
+#define I_8   0x01
+#define I_16  0x02
+#define I_24  0x04
+#define I_v   0x04
+#define I_z   0x05
+#define I_p   0x06
+#define I_MOD 0x08
+#define I_ADD 0x10
+#define I_MODA (I_MOD|I_ADD)
+#define I_PFX 0x20
+#define I_BAD 0x80
+#define I_SPECIAL 0 /* tested manually - just sticking it there for documentation */
+#ifdef TARGET_x86_64
+#define if64(_64, _32) _64
+#else
+#define if64(_64, _32) _32
+#endif
+#define i64(x) if64(I_BAD, x)
+#define o64(x) if64(x, I_BAD)
+
+static const uint8_t onebyte_bits[] = {
+/* todo add right side */
+/*0x*/ REP4(I_MODA), I_8, I_v, i64(0), i64(0), REP4(I_MODA), I_8, I_z, i64(0), I_SPECIAL,
+/*1x*/ REP4(I_MODA), I_8, I_v, i64(0), i64(0), REP4(I_MODA), I_8, I_z, i64(0), i64(0),
+/*2x*/ REP4(I_MODA), I_8, I_v, I_PFX,  i64(0), REP4(I_MODA), I_8, I_z, I_PFX,  i64(0),
+/*3x*/ REP4(I_MODA), I_8, I_v, I_PFX,  i64(0), REP4(I_MODA), I_8, I_z, I_PFX,  i64(0),
+/*4x*/ REP16(if64(PFX, 0)),
+/*5x*/ REP16(0),
+/*6x*/ i64(0), i64(0), i64(I_MOD), I_MOD|I_ADD, I_PFX, I_PFX, I_PFX, I_PFX,
+            I_z, I_MODA|I_z, I_8, I_MODA|I_8, REP4(0),
+/*7x*/ REP16(I_8),
+/*8x*/ I_MODA|I_8, I_MODA|I_v, i64(I_MODA|I_8), I_MODA|I_8, I_MODA|I_8, I_MODA|I_v, I_MODA|I_8, I_MODA|I_v,
+            REP4(I_MODA), I_MOD, I_MODA, I_MOD, I_8|I_SPECIAL,
+/*9x*/ REP8(0), 0, 0, i64(0), 0, 0, 0, 0, 0,
+/*Ax*/ I_8, I_v, I_8, I_v, REP4(0), I_8, I_z,0, 0, 0, 0, 0, 0,
+/*Bx*/ REP8(I_8), REP8(I_v),
+/*Cx*/ I_MODA|I_8, I_MODA|I_8, I_16, 0, i64(I_MODA), i64(I_MODA), I_MODA|I_8, I_MODA|I_8,
+            I_24, 0, I_16, 0, 0, I_8, i64(0), 0,
+/*Dx*/ REP4(I_MODA), i64(I_8), i64(I_8), I_BAD, 0, REP8(I_SPECIAL),
+/*Ex*/ REP8(I_8), I_z, I_z, I_p, I_8, 0, 0, 0, 0,
+/*Fx*/ I_PFX, I_BAD, I_PFX, I_PFX, 0, 0, I_MODA, I_MODA, 0, 0, 0, 0, 0, 0, I_8|I_SPECIAL, I_8|I_SPECIAL,
+};
+_Static_assert(sizeof(onebyte_bits) == 256, "onebyte_bits");