Created
October 7, 2017 08:17
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fib(n)
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| 0000000000400ef0 <_Z3fibi>: | |
| long long fib(int n) { | |
| 400ef0: b8 01 00 00 00 mov $0x1,%eax | |
| if (n <= 1) | |
| 400ef5: 83 ff 02 cmp $0x2,%edi | |
| 400ef8: 0f 8c 8f 00 00 00 jl 400f8d <_Z3fibi+0x9d> | |
| long long a = 1; | |
| long long b = 1; | |
| long long c; | |
| for (int i = 2; i <= n; i++) { | |
| c = a + b; | |
| 400efe: 44 8d 4f 07 lea 0x7(%rdi),%r9d | |
| 400f02: 44 8d 47 fe lea -0x2(%rdi),%r8d | |
| 400f06: b8 01 00 00 00 mov $0x1,%eax | |
| 400f0b: 41 f6 c1 07 test $0x7,%r9b | |
| 400f0f: 74 3d je 400f4e <_Z3fibi+0x5e> | |
| 400f11: 41 83 e1 07 and $0x7,%r9d | |
| 400f15: 31 d2 xor %edx,%edx | |
| 400f17: b8 01 00 00 00 mov $0x1,%eax | |
| 400f1c: b9 01 00 00 00 mov $0x1,%ecx | |
| 400f21: 66 66 66 66 66 66 2e data16 data16 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
| 400f28: 0f 1f 84 00 00 00 00 | |
| 400f2f: 00 | |
| 400f30: 48 89 ce mov %rcx,%rsi | |
| 400f33: 48 89 c1 mov %rax,%rcx | |
| 400f36: 41 89 d2 mov %edx,%r10d | |
| 400f39: 48 89 f0 mov %rsi,%rax | |
| 400f3c: 48 01 c8 add %rcx,%rax | |
| return 1; | |
| long long a = 1; | |
| long long b = 1; | |
| long long c; | |
| for (int i = 2; i <= n; i++) { | |
| 400f3f: 41 8d 52 01 lea 0x1(%r10),%edx | |
| 400f43: 41 39 d1 cmp %edx,%r9d | |
| 400f46: 75 e8 jne 400f30 <_Z3fibi+0x40> | |
| 400f48: 41 83 c2 03 add $0x3,%r10d | |
| 400f4c: eb 0b jmp 400f59 <_Z3fibi+0x69> | |
| 400f4e: 41 ba 02 00 00 00 mov $0x2,%r10d | |
| 400f54: b9 01 00 00 00 mov $0x1,%ecx | |
| c = a + b; | |
| 400f59: 41 83 f8 07 cmp $0x7,%r8d | |
| 400f5d: 72 2e jb 400f8d <_Z3fibi+0x9d> | |
| 400f5f: ff c7 inc %edi | |
| 400f61: 44 29 d7 sub %r10d,%edi | |
| 400f64: 66 66 66 2e 0f 1f 84 data16 data16 nopw %cs:0x0(%rax,%rax,1) | |
| 400f6b: 00 00 00 00 00 | |
| 400f70: 48 01 c1 add %rax,%rcx | |
| 400f73: 48 01 c8 add %rcx,%rax | |
| 400f76: 48 01 c1 add %rax,%rcx | |
| 400f79: 48 01 c8 add %rcx,%rax | |
| 400f7c: 48 01 c1 add %rax,%rcx | |
| 400f7f: 48 01 c8 add %rcx,%rax | |
| 400f82: 48 01 c1 add %rax,%rcx | |
| 400f85: 48 01 c8 add %rcx,%rax | |
| return 1; | |
| long long a = 1; | |
| long long b = 1; | |
| long long c; | |
| for (int i = 2; i <= n; i++) { | |
| 400f88: 83 c7 f8 add $0xfffffff8,%edi | |
| 400f8b: 75 e3 jne 400f70 <_Z3fibi+0x80> | |
| c = a + b; | |
| a = b; | |
| b = c; | |
| } | |
| return c; | |
| } | |
| 400f8d: c3 retq | |
| 400f8e: 66 90 xchg %ax,%ax |
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