diff options
Diffstat (limited to 'src/asm.hpp')
| -rw-r--r-- | src/asm.hpp | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/asm.hpp b/src/asm.hpp new file mode 100644 index 0000000..4d5eb73 --- /dev/null +++ b/src/asm.hpp @@ -0,0 +1,74 @@ +#ifndef SRC_ASM_HPP_ +#define SRC_ASM_HPP_ + +#include <cstdint> + +enum class type_t {R, I, S, U, B, J}; + +struct r_type { + uint32_t funct7 : 7; + uint32_t rs2 : 5; + uint32_t rs1 : 5; + uint32_t funct3 : 3; + uint32_t rd : 5; + uint32_t opcode : 7; +}; + +struct i_type { + uint32_t imm : 12; + uint32_t rs1 : 5; + uint32_t funct3 : 3; + uint32_t rd : 5; + uint32_t opcode : 7; +}; + +struct s_type { + uint32_t imm_hi : 7; + uint32_t rs2 : 5; + uint32_t rs1 : 5; + uint32_t funct3 : 3; + uint32_t imm_lo : 5; + uint32_t opcode : 7; +}; + +struct u_type { + uint32_t imm : 10; + uint32_t rd : 5; + uint32_t opcode : 7; +}; + +struct b_type { + uint32_t a : 1; + uint32_t imm_hi : 6; + uint32_t rs2 : 5; + uint32_t rs1 : 5; + uint32_t funct3 : 3; + uint32_t imm_lo : 4; + uint32_t b : 1; + uint32_t opcode : 7; +}; + +struct j_type { + uint32_t a : 1; + uint32_t imm_lo : 10; + uint32_t b : 1; + uint32_t imm_hi : 8; + uint32_t rd : 5; + uint32_t opcode : 7; +}; + +struct instruction_t { + type_t t; + union { + r_type r; + i_type i; + s_type s; + u_type u; + b_type b; + j_type j; + uint32_t value; + }; +}; + +#endif // SRC_ASM_HPP_ + |