Here is a list of all documented functions with links to the documentation:

math_antilog() : math.64.c, math.h
math_ceil() : math.64.c, math.h
math_exp() : math.64.c, math.h
math_floor() : math.64.c, math.h
math_isinf() : math.64.c, math.h
math_isnan() : math.64.c, math.h
math_log() : math.64.c, math.h
math_power() : math.64.c, math.h
math_root() : math.64.c, math.h
math_sin() : math.64.c, math.h
math_sin_approx() : math.64.c
memory_create_heap_hash() : memory_heap_hash.xx.c, memory.h
memory_create_heap_simple() : memory_simple.xx.c, memory.h
memory_free_ext() : memory.xx.c, memory.h
memory_get_default_heap() : memory.xx.c, memory.h
memory_get_heap() : memory.xx.c, memory.h
memory_get_heap_stat_ext() : memory.xx.c, memory.h
memory_malloc_ext() : memory.xx.c, memory.h
memory_memclean() : memory.h
memory_memcompare() : memory.xx.c, memory.h
memory_memcopy() : memory.xx.c, memory.h
memory_memset() : memory.h
memory_paging_add_page_ext() : paging.64.c, paging.h
memory_paging_switch_table() : paging.64.c, paging.h
memory_set_default_heap() : memory.xx.c, memory.h
memory_simple_free() : memory_simple.xx.c
memory_simple_malloc_ext() : memory_simple.xx.c
MODULE() : syscall.64.c, hpet.64.c, hashmap.64.c, systeminfo.64.c, xxhash.64.c, zpack.64.c, helloworld.xx.c, helloworld_cpp.64.cpp, tosdb_cache.64.c, console.c, dummy_methods.c, efi_disk_impl.c, main.c
murmurhash3_128() : murmurhash.64.c, murmurhash.h
murmurhash64a() : murmurhash.64.c, murmurhash.h