WebAn input operand can be tied to an earlyclobber operand if its only use as an input occurs before the early result is written. Adding alternatives of this form often allows GCC to produce better code when only some of the inputs can be affected by the earlyclobber. See, for example, the `mulsi3' insn of the ARM. WebAug 31, 2015 · A operand which is read by the instruction can be tied to an earlyclobber operand if its only use as an input occurs before the early result is written. Adding alternatives of this form often allows GCC to produce better code when only some of the read operands can be affected by the earlyclobber. See, for example, the mulsi3 insn of …

Extended Asm (Using the GNU Compiler Collection (GCC)) Where …

Web& Means that this operand is an earlyclobber operand, which is modified before the instruction is finished using the input operands. Therefore, this operand may not lie in a register that is used as an input operand or as part … WebAn operand which is read by the instruction can be tied to an earlyclobber operand if its only use as an input occurs before the early result is written. Adding alternatives of this form often allows GCC to produce better code when only some of the read operands can be affected by the earlyclobber. liszt am bach raiding

c - How does "+&r" differ from "+r"? - Stack Overflow

Web+A operand which is read by the instruction can be tied to an earlyclobber +operand if its only use as an input occurs before the early result is +written. Adding alternatives of this form often allows GCC to produce +better code when only some of the read operands can be affected by the +earlyclobber. WebA operand which is read by to instruction cans will tied to an earlyclobber operand are its only use as an input occurs before the fast result is written. Adding option of this submit common allows GCC to produce better password when only some of the read format can be affected over the earlyclobber. See, for example, the mulsi3 insn of the RAW. WebSep 4, 2024 · 參考 When to use earlyclobber constraint in extended GCC inline assembly? ... When not using an asmSymbolicName, use the (zero-based) position of the operand in the list of operands in the assembler template. For example if there are three output operands, use ‘%0’ in the template to refer to the first, ‘%1’ for the second, and ‘%2 ... impeding the process