From 625af54662b4ff95c40d7b91fbb047ada6b06622 Mon Sep 17 00:00:00 2001 From: Dimitar Dimitrov Date: Sun, 17 Aug 2025 21:39:17 +0300 Subject: pru: libgcc: Add software implementation for multiplication For cores without a hardware multiplier, set respective optabs with library functions which use software implementation of multiplication. The implementation was copied from the RL78 backend. gcc/ChangeLog: * config/pru/pru.cc (pru_init_libfuncs): Set softmpy libgcc functions for optab multiplication entries if TARGET_OPT_MUL option is not set. libgcc/ChangeLog: * config/pru/libgcc-eabi.ver: Add __pruabi_softmpyi and __pruabi_softmpyll symbols. * config/pru/t-pru: Add softmpy source files. * config/pru/pru-softmpy.h: New file. * config/pru/softmpyi.c: New file. * config/pru/softmpyll.c: New file. Signed-off-by: Dimitar Dimitrov --- gcc/config/pru/pru.cc | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'gcc') diff --git a/gcc/config/pru/pru.cc b/gcc/config/pru/pru.cc index 322e319..3fdc56e 100644 --- a/gcc/config/pru/pru.cc +++ b/gcc/config/pru/pru.cc @@ -941,10 +941,19 @@ pru_init_libfuncs (void) /* Long long. */ set_optab_libfunc (ashr_optab, DImode, "__pruabi_asrll"); - set_optab_libfunc (smul_optab, DImode, "__pruabi_mpyll"); set_optab_libfunc (ashl_optab, DImode, "__pruabi_lslll"); set_optab_libfunc (lshr_optab, DImode, "__pruabi_lsrll"); + if (TARGET_OPT_MUL) + { + set_optab_libfunc (smul_optab, DImode, "__pruabi_mpyll"); + } + else + { + set_optab_libfunc (smul_optab, DImode, "__pruabi_softmpyll"); + set_optab_libfunc (smul_optab, SImode, "__pruabi_softmpyi"); + } + set_optab_libfunc (sdiv_optab, SImode, "__pruabi_divi"); set_optab_libfunc (udiv_optab, SImode, "__pruabi_divu"); set_optab_libfunc (smod_optab, SImode, "__pruabi_remi"); -- cgit v1.1