Eliminate unused C DSP functions at compile time

When compiling with asm enabled there's no point in compiling
C versions of DSP functions that have asm implementations using
instruction sets that the compiler can unconditionally use.

E.g. when compiling with -mssse3 we can remove the C version
of all functions with SSSE3 implementations.

This is accomplished using the compiler's dead code elimination
functionality.

Can be configured using the new 'trim_dsp' meson option, which
by default is enabled when compiling in release mode.

1 files changed, 0 insertions, 3 deletions

diff --git a/src/cdef.h b/src/cdef.h
index 2a933d5..07c84d9 100644
--- a/src/cdef.h
+++ b/src/cdef.h
@@ -67,8 +67,5 @@ typedef struct Dav1dCdefDSPContext {
 } Dav1dCdefDSPContext;
 
 bitfn_decls(void dav1d_cdef_dsp_init, Dav1dCdefDSPContext *c);
-bitfn_decls(void dav1d_cdef_dsp_init_arm, Dav1dCdefDSPContext *c);
-bitfn_decls(void dav1d_cdef_dsp_init_ppc, Dav1dCdefDSPContext *c);
-bitfn_decls(void dav1d_cdef_dsp_init_x86, Dav1dCdefDSPContext *c);
 
 #endif /* DAV1D_SRC_CDEF_H */