p := &obj.Prog{ As: obj.AADD, Reg: obj.RAX, From: obj.Addr{ Type: obj.TYPE_CONST, Offset: 42, }, To: obj.Addr{ Type: obj.TYPE_REG, Reg: obj.RBX, } }
p := &obj.Prog{ As: obj.ATEST, // test instruction Reg: obj.RAX, // source operand register To: obj.Addr{ // destination operand address Type: obj.TYPE_CONST, Offset: 0, }, } q := &obj.Prog{ As: obj.AJNE, // jump if not equal instruction To: obj.Addr{ // jump target address Type: obj.TYPE_BRANCH, }, } obj.Pcond(p, q) // set jump target for p to qThis code creates two Prog structs representing a test instruction and a jump-if-not-equal instruction. The Pcond function is used to link these instructions together by setting the jump target of the first instruction to the second instruction. If the test instruction sets the zero flag to zero, the jump instruction will be skipped and execution will continue with the instruction after it. Overall, the cmd/internal/obj package provides a powerful set of tools for generating and manipulating object files.