PERF_REG_X86_XMM 81 tools/perf/arch/x86/include/perf_regs.h case PERF_REG_X86_XMM ## x: \ PERF_REG_X86_XMM 82 tools/perf/arch/x86/include/perf_regs.h case PERF_REG_X86_XMM ## x + 1: \