Add table of instructions and their encodings

2 files changed, 104 insertions, 0 deletions

diff --git a/mnemonics.c b/mnemonics.c
new file mode 100644
index 0000000..4a21992
--- /dev/null
+++ b/mnemonics.c
@@ -0,0 +1,40 @@
+#include "mnemonics.h"
+
+const struct mnemonic mnemonics[] = {
+	{ "add",    0x0000, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* add */
+	{ "sub",    0x0001, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* subtract */
+	{ "mul",    0x0002, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* multiply */
+	{ "div",    0x0003, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* divide */
+	{ "and",    0x0100, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* bitwise and */
+	{ "or",     0x0101, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* bitwise or */
+	{ "xor",    0x0102, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* bitwise exclusive or */
+	{ "lsl",    0x1000, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* logical shift left */
+	{ "lsr",    0x1100, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* logical shift right */
+	{ "asl",    0x1002, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* arithmetic shift left (fills with lsb) */
+	{ "asr",    0x1102, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* arithmetic shift right (fills with msb) */
+	{ "rol",    0x1003, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* rotate left */
+	{ "ror",    0x1103, { {REG,    9}, {REG,    5}, {REG, 2} } },  /* rotate right */
+	{ "not",    0x2000, { {REG,    9}, {REG,    2}           } },  /* bitwise inverse */
+	{ "neg",    0x2100, { {REG,    9}, {REG,    2}           } },  /* negate */
+	{ "btc",    0x3000, { {REG,    9}, {REG,    2}           } },  /* bit clear */
+	{ "bts",    0x3100, { {REG,    9}, {REG,    2}           } },  /* bit set */
+	{ "mov",    0x4004, { {REG,    9}, {REG,    5}           } },  /* register move */
+	{ "st.b",   0x4100, { {REGPTR, 9}, {REG,    5}           } },  /* store byte */
+	{ "st.w",   0x4104, { {REGPTR, 9}, {REG,    5}           } },  /* store word */
+	{ "ld.bl",  0x4101, { {REG,    9}, {REGPTR, 5}           } },  /* load byte into low byte of register */
+	{ "ld.bh",  0x4111, { {REG,    9}, {REGPTR, 5}           } },  /* load byte into high byte of register */
+	{ "ld.w",   0x4105, { {REG,    9}, {REGPTR, 5}           } },  /* load word */
+	{ "ldi.bl", 0x5000, { {REG,    9}, {IMM,    0}           } },  /* load immediate into low byte of register */
+	{ "ldi.bh", 0x5100, { {REG,    9}, {IMM,    0}           } },  /* load immediate into high byte of register */
+	{ "beq",    0x6000, { {PCOFF,  0},                       } },  /* branch if equal */
+	{ "bne",    0x6200, { {PCOFF,  0},                       } },  /* branch if not equal */
+	{ "bgt",    0x6400, { {PCOFF,  0},                       } },  /* branch if greater than */
+	{ "bge",    0x6600, { {PCOFF,  0},                       } },  /* branch if greater than or equal */
+	{ "blt",    0x6800, { {PCOFF,  0},                       } },  /* branch if less than */
+	{ "ble",    0x6a00, { {PCOFF,  0},                       } },  /* branch if less than or equal */
+	{ "bra",    0x6e00, { {PCOFF,  0},                       } },  /* branch always */
+	{ "jmp",    0x7000, { {REGPTR, 5},                       } },  /* branch always */
+	{ "addpc",  0x8000, { {REG,    9}, {IMM,    0}           } },  /* add program counter and immediate */
+	{ "nop",    0xffff, {                                    } },  /* no operation */
+};
+
diff --git a/mnemonics.h b/mnemonics.h
new file mode 100644
index 0000000..969926e
--- /dev/null
+++ b/mnemonics.h
@@ -0,0 +1,64 @@
+#ifndef NQ_MNEMONICS_H
+#define NQ_MNEMONICS_H
+
+#include <stdint.h>
+
+/* operand types */
+#define REG      1
+#define REGPTR   2
+#define IMM      3
+#define PCOFF    4
+
+enum {
+	MNEM_ADD,
+	MNEM_SUB,
+	MNEM_MUL,
+	MNEM_DIV,
+	MNEM_AND,
+	MNEM_OR,
+	MNEM_XOR,
+	MNEM_LSL,
+	MNEM_LSR,
+	MNEM_ASL,
+	MNEM_ASR,
+	MNEM_ROL,
+	MNEM_ROR,
+	MNEM_NOT,
+	MNEM_NEG,
+	MNEM_BTC,
+	MNEM_BTS,
+	MNEM_MOV,
+	MNEM_ST_B,
+	MNEM_ST_W,
+	MNEM_LD_BL,
+	MNEM_LD_BH,
+	MNEM_LD_W,
+	MNEM_LDI_BL,
+	MNEM_LDI_BH,
+	MNEM_BEQ,
+	MNEM_BNE,
+	MNEM_BGT,
+	MNEM_BGE,
+	MNEM_BLT,
+	MNEM_BLE,
+	MNEM_BRA,
+	MNEM_JMP,
+	MNEM_ADDPC,
+	MNEM_NOP,
+};
+
+struct operand {
+	uint8_t type;
+	uint8_t shift;
+};
+
+struct mnemonic {
+	const char *mnem;
+	uint16_t    bits;
+	struct operand operands[3];
+};
+
+extern const struct mnemonic mnemonics[];
+
+#endif
+