Function EmitCompressedRegArith

external/biscuit/src/assembler_compressed.cpp:61–70

Emits a compressed register arithmetic instruction. These consist of: funct6 | rd | funct2 | rs | op

// Emits a compressed register arithmetic instruction. These consist of:
// funct6 | rd | funct2 | rs | op
void EmitCompressedRegArith(CodeBuffer& buffer, uint32_t funct6, GPR rd, uint32_t funct2,
                            GPR rs, uint32_t op) {
    BISCUIT_ASSERT(IsValid3BitCompressedReg(rs));
    BISCUIT_ASSERT(IsValid3BitCompressedReg(rd));

    const auto rd_san = CompressedRegTo3BitEncoding(rd);
    const auto rs_san = CompressedRegTo3BitEncoding(rs);
    buffer.Emit16(((funct6 & 0b111111) << 10) | (rd_san << 7) | ((funct2 & 0b11) << 5) |
                  (rs_san << 2) | (op & 0b11));
}

// Emits a compressed store instruction. These consist of:
// funct3 | imm | rs1 | imm | rs2 | op