62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
// InstructionEncoder.h
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#ifndef INSTRUCTION_ENCODER_H
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#define INSTRUCTION_ENCODER_H
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#include <cstdint>
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// 无条件跳转 B <label>
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uint32_t encodeB(int32_t offset);
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// 返回 RET
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uint32_t encodeRET();
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// 空指令 NOP
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uint32_t encodeNOP();
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// ADD (immediate): add rd, rn, #imm
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uint32_t encodeADDimm(uint8_t rd, uint8_t rn, uint16_t imm);
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// SUB (immediate): sub rd, rn, #imm
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uint32_t encodeSUBimm(uint8_t rd, uint8_t rn, uint16_t imm);
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// MOVZ (move wide immediate): movz rd, #imm16, {LSL #16 if highHalf}
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uint32_t encodeMOVz(uint8_t rd, uint16_t imm16, bool highHalf);
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// CMP immediate: cmp rn, #imm (encoded as subs wzr, rn, #imm)
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uint32_t encodeCMPimm(uint8_t rn, uint16_t imm);
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// CSET (condition set): cset rd, <cond>
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// cond: 0=eq,1=ne,2=hs,3=lo,4=mi,5=pl,6=vs,7=vc,8=hi,9=ls,10=ge,11=lt,12=gt,13=le,14=al,15=nv
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uint32_t encodeCSET(uint8_t rd, uint8_t cond);
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// STP (pre-index): stp rt1, rt2, [rn, #offset]!
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uint32_t encodeSTP(uint8_t rt1, uint8_t rt2, uint8_t rn, int16_t offset);
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// LDP (post-index): ldp rt1, rt2, [rn], #offset
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uint32_t encodeLDP(uint8_t rt1, uint8_t rt2, uint8_t rn, int16_t offset);
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// STR (unsigned immediate): str rt, [rn, #offset]
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uint32_t encodeSTR(uint8_t rt, uint8_t rn, int16_t offset);
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// LDR (unsigned immediate): ldr rt, [rn, #offset]
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uint32_t encodeLDR(uint8_t rt, uint8_t rn, int16_t offset);
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// ADD sp, sp, #imm
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inline uint32_t encodeADDsp(uint16_t imm) {
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return encodeADDimm(/*rd=*/31, /*rn=*/31, imm);
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}
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// SUB sp, sp, #imm
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inline uint32_t encodeSUBsp(uint16_t imm) {
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return encodeSUBimm(/*rd=*/31, /*rn=*/31, imm);
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}
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// ADD (register): add rd, rn, rm
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uint32_t encodeADDreg(uint8_t rd, uint8_t rn, uint8_t rm);
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// Compare (register): subs wzr, rn, rm
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uint32_t encodeCMPreg(uint8_t rn, uint8_t rm);
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// Conditional branch B.<cond> imm
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uint32_t encodeBCond(uint8_t cond, int32_t offset);
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#endif // INSTRUCTION_ENCODER_H
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