diff options
Diffstat (limited to 'src/asm.hpp')
| -rw-r--r-- | src/asm.hpp | 104 |
1 files changed, 95 insertions, 9 deletions
diff --git a/src/asm.hpp b/src/asm.hpp index 4d5eb73..1105409 100644 --- a/src/asm.hpp +++ b/src/asm.hpp @@ -3,7 +3,9 @@ #include <cstdint> -enum class type_t {R, I, S, U, B, J}; +#define VERIFY_SIZE(X) static_assert(sizeof(X) == sizeof(uint32_t), "Size Does Not Match.") + +enum class type_t { R, I, S, U, B, J, I_SHIFT }; struct r_type { uint32_t funct7 : 7; @@ -12,6 +14,14 @@ struct r_type { uint32_t funct3 : 3; uint32_t rd : 5; uint32_t opcode : 7; + + r_type(uint32_t funct7, uint32_t rs2, uint32_t rs1, uint32_t funct3, uint32_t rd, uint32_t opcode) : + funct7(funct7 & 7), + rs2(rs2 & 5), + rs1(rs1 & 5), + funct3(funct3 & 3), + rd(rd & 5), + opcode(opcode & 7) {} }; struct i_type { @@ -20,6 +30,30 @@ struct i_type { uint32_t funct3 : 3; uint32_t rd : 5; uint32_t opcode : 7; + + i_type(uint32_t imm, uint32_t rs1, uint32_t funct3, uint32_t rd, uint32_t opcode) : + imm(imm & 12), + rs1(rs1 & 5), + funct3(funct3 & 3), + rd(rd & 5), + opcode(opcode & 7) {} +}; + +struct i_shift_type { + uint32_t shtyp : 6; + uint32_t shmat : 6; + uint32_t rs1 : 5; + uint32_t funct3 : 3; + uint32_t rd : 5; + uint32_t opcode : 7; + + i_shift_type(uint32_t shtyp, uint32_t shmat, uint32_t rs1, uint32_t funct3, uint32_t rd, uint32_t opcode) : + shtyp(shtyp & 6), + shmat(shmat & 6), + rs1(rs1 & 5), + funct3(funct3 & 3), + rd(rd & 5), + opcode(opcode & 7) {} }; struct s_type { @@ -29,12 +63,22 @@ struct s_type { uint32_t funct3 : 3; uint32_t imm_lo : 5; uint32_t opcode : 7; + + s_type(uint32_t imm_hi, uint32_t rs2, uint32_t rs1, uint32_t funct3, uint32_t imm_lo, uint32_t opcode) : + imm_hi(imm_hi & 7), + rs2(rs2 & 5), + rs1(rs1 & 5), + funct3(funct3 & 3), + imm_lo(imm_lo & 5), + opcode(opcode & 7) {} }; struct u_type { uint32_t imm : 10; uint32_t rd : 5; uint32_t opcode : 7; + + u_type(uint32_t imm, uint32_t rd, uint32_t opcode) : imm(imm & 10), rd(rd & 5), opcode(opcode & 7) {} }; struct b_type { @@ -46,6 +90,23 @@ struct b_type { uint32_t imm_lo : 4; uint32_t b : 1; uint32_t opcode : 7; + + b_type(uint32_t a, + uint32_t imm_hi, + uint32_t rs2, + uint32_t rs1, + uint32_t funct3, + uint32_t imm_lo, + uint32_t b, + uint32_t opcode) : + a(a & 1), + imm_hi(imm_hi & 6), + rs2(rs2 & 5), + rs1(rs1 & 5), + funct3(funct3 & 3), + imm_lo(imm_lo & 4), + b(b & 1), + opcode(opcode & 7) {} }; struct j_type { @@ -55,19 +116,44 @@ struct j_type { uint32_t imm_hi : 8; uint32_t rd : 5; uint32_t opcode : 7; + + j_type(uint32_t a, uint32_t imm_lo, uint32_t b, uint32_t imm_hi, uint32_t rd, uint32_t opcode) : + a(a & 1), + imm_lo(imm_lo & 10), + b(b & 1), + imm_hi(imm_hi & 8), + rd(rd & 5), + opcode(opcode & 7) {} }; +VERIFY_SIZE(r_type); +VERIFY_SIZE(i_type); +VERIFY_SIZE(i_shift_type); +VERIFY_SIZE(s_type); +VERIFY_SIZE(u_type); +VERIFY_SIZE(b_type); +VERIFY_SIZE(j_type); + struct instruction_t { - type_t t; + type_t type; union { - r_type r; - i_type i; - s_type s; - u_type u; - b_type b; - j_type j; - uint32_t value; + r_type r; + i_type i; + i_shift_type is; + s_type s; + u_type u; + b_type b; + j_type j; + uint32_t value; }; + + explicit instruction_t(const r_type r) : type(type_t::R), r(r) {} + explicit instruction_t(const i_type i) : type(type_t::I), i(i) {} + explicit instruction_t(const i_shift_type is) : type(type_t::I_SHIFT), is(is) {} + explicit instruction_t(const s_type s) : type(type_t::S), s(s) {} + explicit instruction_t(const u_type u) : type(type_t::U), u(u) {} + explicit instruction_t(const b_type b) : type(type_t::B), b(b) {} + explicit instruction_t(const j_type j) : type(type_t::J), j(j) {} }; #endif // SRC_ASM_HPP_ |