Currently, there are two Blackfin-specific built-in functions. These are used for generating CSYNC
and SSYNC
machine insns without using inline assembly; by using these built-in functions the compiler can automatically add workarounds for hardware errata involving these instructions. These functions are named as follows:
void __builtin_bfin_csync (void) void __builtin_bfin_ssync (void)
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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/Blackfin-Built_002din-Functions.html