diff options
Diffstat (limited to 'src/Runtime/ptmf.c')
| -rw-r--r-- | src/Runtime/ptmf.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/Runtime/ptmf.c b/src/Runtime/ptmf.c new file mode 100644 index 0000000..b9e8a90 --- /dev/null +++ b/src/Runtime/ptmf.c @@ -0,0 +1,45 @@ + +typedef struct PTMF { + long this_delta; // delta to this pointer + long vtbl_offset; // offset in vtable (-1: not a virtual function) + union { + void* func_addr; //nonvirtual function address + long ventry_offset; // of virtual function entry in vtable + } func_data; +} PTMF; + +const PTMF __ptmf_null = {0, 0, 0}; + +/* clang-format off */ +asm void __ptmf_test(register PTMF* ptmf) { + nofralloc + + lwz r5, PTMF.this_delta(ptmf) + lwz r6, PTMF.vtbl_offset(ptmf) + lwz r7, PTMF.func_data(ptmf) + li r3, 1 + cmpwi cr0, r5, 0 + cmpwi cr6, r6, 0 + cmpwi cr7, r7, 0 + bnelr cr0 + bnelr cr6 + bnelr cr7 + li r3, 0 + blr +} + +asm void __ptmf_scall(...) { + nofralloc + lwz r0, PTMF.this_delta(r12) + lwz r11, PTMF.vtbl_offset(r12) + lwz r12, PTMF.func_data(r12) + add r3, r3, r0 + cmpwi r11, 0 + blt @1 + lwzx r12, r3, r12 + lwzx r12, r12, r11 +@1 + mtctr r12 + bctr +} +/* clang-format - on*/ |