9. Inline Assembly Code


TODAY, FEW PROGRAMMERS USE ASSEMBLY LANGUAGE. Higher-level languages such as C and C++ run on nearly all architectures and yield higher productivity when writing and maintaining code. For occasions when programmers need to use assembly instructions in their programs, the GNU Compiler Collection permits programmers to add architecture-dependent assembly language instructions to their programs.

GCC’s inline assembly statements should not be used indiscriminately. Assembly language instructions are architecture-dependent, so, for example, programs using x86 instructions cannot be compiled on PowerPC computers. To ...

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