1 files changed, 81 insertions, 0 deletions
diff --git a/core/bits.h b/core/bits.h
new file mode 100644
index 0000000..93226bb
--- /dev/null
+++ b/core/bits.h
@@ -0,0 +1,81 @@
+#ifndef TASM_BITS_H
+#define TASM_BITS_H
+
+#include "regs.h"
+#include "tri.h"
+
+#define OPCODE_OP_IMM 0b0000000000
+#define OP_IMM_ADDI   0b0000000000
+#define OP_IMM_SUBI   0b0000000001
+#define OP_IMM_SLTI   0b0000000010
+#define OP_IMM_SGEI   0b0000000100
+#define OP_IMM_SEQI   0b0000000101
+#define OP_IMM_SNEI   0b0000000110
+#define OP_IMM_SLLI   0b0000001000
+#define OP_IMM_SRLI   0b0000001001
+#define OP_IMM_UNOP   0b0000001010
+
+#define OPCODE_OP     0b0000000001
+#define OP_ADD        0b0000000000
+#define OP_SUB        0b0000000001
+#define OP_SLT        0b0000000010
+#define OP_SGE        0b0000000100
+#define OP_SEQ        0b0000000101
+#define OP_SNE        0b0000000110
+#define OP_SLL        0b0000001000
+#define OP_SRL        0b0000001001
+#define OP_MUL        0b0000001010
+#define OP_DIV        0b0000010000
+#define OP_REM        0b0000010001
+
+#define OPCODE_LUI    0b0000000010
+#define OPCODE_AUIPC  0b0000000100
+#define OPCODE_JAL    0b0000000101
+#define OPCODE_JALR   0b0000000110
+
+#define OPCODE_BRANCH 0b0000001000
+#define BRANCH_BEQ    0b0000000000
+#define BRANCH_BNE    0b0000000001
+#define BRANCH_BLT    0b0000000010
+#define BRANCH_BGE    0b0000000100
+
+#define OPCODE_LOAD   0b0000001001
+#define OPCODE_STORE  0b0000001010
+#define STORE_CST     0b0000000001
+
+#define OPCODE_SYSTEM 0b0000010000
+#define SYSTEM_ECALL  0b0000000000
+#define SYSTEM_EBREAK 0b0000000001
+#define SYSTEM_PCALL  0b0000000010
+#define SYSTEM_CSRRW  0b0000000100
+#define SYSTEM_CSRRS  0b0000000101
+#define SYSTEM_CSRRC  0b0000000110
+
+#define OPCODE_MEM    0b0000010001
+#define MEM_FENCE     0b0000000000
+#define MEM_STT       0b0000000001
+#define MEM_ENT       0b0000000010
+#define MEM_CAT       0b0000000100
+
+#define OPCODE_DIOP   0b0000010010
+
+#define WIDTH_W       0b0100000000
+#define WIDTH_T       0b0000000000
+
+#define nonnull __attribute__((nonnull))
+
+tri_t parse_opcode(tri_t i);
+
+tri_t build_r(tri_t opcode, tri_t rd, tri_t fn0, tri_t rs1, tri_t rs2, tri_t fn5);
+void nonnull parse_r(tri_t i, tri_t *rd, tri_t *rs1, tri_t *rs2, tri_t *fn0, tri_t *fn5);
+
+tri_t build_i(tri_t opcode, tri_t rd, tri_t fn0, tri_t rs1, tri_t imm9);
+void nonnull parse_i(tri_t i, tri_t *rd, tri_t *fn0, tri_t *rs1, tri_t *imm9);
+
+tri_t build_s(tri_t opcode, tri_t imm4, tri_t fn0, tri_t rs1, tri_t rs2, tri_t imm5);
+void nonnull parse_s(tri_t i, tri_t *imm4, tri_t *fn0, tri_t *rs1, tri_t *rs2, tri_t *imm5);
+
+tri_t build_u(tri_t opcode, tri_t rd, tri_t imm18);
+void nonnull parse_u(tri_t i, tri_t *rd, tri_t *imm18);
+
+#endif