| /* APPLE LOCAL begin radar 4187164 */ |
| /* { dg-do run { target powerpc*-*-darwin* } } */ |
| /* This testcase isn't 64-bit safe. */ |
| /* { dg-require-effective-target ilp32 } */ |
| /* { dg-options "-fasm-blocks" } */ |
| |
| #include <stdio.h> |
| extern void abort(); |
| |
| asm int FibonacciAsm(register int n) |
| { |
| // prolog. Save return addr and three scratch registers |
| nofralloc |
| mflr r0 |
| stw r31, -4(sp) |
| stw r30, -8(sp) |
| stw r29, -12(sp) |
| stw r0, 8(sp) |
| stwu sp, -80(sp) |
| |
| // body of function |
| |
| // is n <= 1? if so, n is our return value. f(0) = 0, f(1) = 1, f(2) starts the actual math |
| cmpwi cr7, n, 1 |
| ble cr7,LDone |
| |
| /// ok, n > 2. save n, compute f(n-1) and f(n-2), then add them together and we're done |
| mr r31, n |
| |
| subi r3, r31, 1 |
| bl FibonacciAsm |
| mr r30, r3 |
| |
| subi r3, r31, 2 |
| bl FibonacciAsm |
| mr r29, r3 |
| |
| add r3, r29, r30 |
| LDone: |
| // epilog. Restore scratch registers and return to caller |
| addi sp, sp, 80 |
| lwz r0, 8(sp) |
| lwz r29, -12(sp) |
| lwz r30, -8(sp) |
| lwz r31, -4(sp) |
| mtlr r0 |
| blr |
| } |
| |
| int main(int argc, char* argv[]) |
| { |
| int x; |
| |
| x = FibonacciAsm(12); |
| if (x != 144) |
| abort(); |
| return 0; |
| } |
| /* APPLE LOCAL end radar 4187164 */ |
