Created
September 4, 2013 16:13
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JIT assembly
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| fxdiv0 | |
| int d = 0; | |
| 00000000 push ebp | |
| 00000001 mov ebp,esp | |
| 00000003 push edi | |
| 00000004 push esi | |
| 00000005 mov esi,ecx | |
| 00000007 mov ecx,edx | |
| 00000009 xor edx,edx | |
| if (x1 != 0) | |
| 0000000b test esi,esi | |
| 0000000d je 00000034 | |
| { | |
| if (x1 > 0) | |
| 0000000f test esi,esi | |
| 00000011 jle 0000001C | |
| { | |
| d = x1 / x2; | |
| 00000013 mov eax,esi | |
| 00000015 cdq | |
| 00000016 idiv eax,ecx | |
| 00000018 mov edx,eax | |
| 0000001a jmp 00000034 | |
| } | |
| else if (x2 > 0) | |
| 0000001c test ecx,ecx | |
| 0000001e jle 0000002B | |
| { | |
| d = (x1 + 1) / x2 - 1; | |
| 00000020 lea eax,[esi+1] | |
| 00000023 cdq | |
| 00000024 idiv eax,ecx | |
| 00000026 dec eax | |
| 00000027 mov edx,eax | |
| 00000029 jmp 00000034 | |
| } | |
| else | |
| { | |
| d = (x1 + 1) / x2 + 1; | |
| 0000002b lea eax,[esi+1] | |
| 0000002e cdq | |
| 0000002f idiv eax,ecx | |
| 00000031 inc eax | |
| 00000032 mov edx,eax | |
| } | |
| } | |
| int m = -(unchecked(d * x2 - x1)); | |
| 00000034 mov edi,ecx | |
| 00000036 imul edi,edx | |
| 00000039 sub edi,esi | |
| 0000003b neg edi | |
| int halfx2 = x2 / 2; | |
| 0000003d mov eax,ecx | |
| 0000003f sar eax,1 | |
| 00000041 jns 00000046 | |
| 00000043 adc eax,0 | |
| // Math.Abs is too slow | |
| int abshalfx2 = halfx2 >= 0 ? halfx2 : -halfx2; | |
| 00000046 test eax,eax | |
| 00000048 jge 00000050 | |
| 0000004a neg eax | |
| 0000004c mov esi,eax | |
| 0000004e jmp 00000052 | |
| 00000050 mov esi,eax | |
| if (m < (abshalfx2 + (x2 & 1))) | |
| 00000052 mov eax,ecx | |
| 00000054 and eax,1 | |
| 00000057 add esi,eax | |
| 00000059 cmp esi,edi | |
| 0000005b jle 00000063 | |
| { | |
| return d; | |
| 0000005d mov eax,edx | |
| 0000005f pop esi | |
| 00000060 pop edi | |
| 00000061 pop ebp | |
| 00000062 ret | |
| } | |
| if (x2 > 0) | |
| 00000063 test ecx,ecx | |
| 00000065 jle 0000006E | |
| { | |
| return d + 1; | |
| 00000067 inc edx | |
| 00000068 mov eax,edx | |
| 0000006a pop esi | |
| 0000006b pop edi | |
| 0000006c pop ebp | |
| 0000006d ret | |
| } | |
| return d - 1; | |
| 0000006e dec edx | |
| 0000006f mov eax,edx | |
| 00000071 pop esi | |
| 00000072 pop edi | |
| 00000073 pop ebp | |
| 00000074 ret | |
| fxdiv | |
| if (x1 == 0) | |
| 00000000 push ebp | |
| 00000001 mov ebp,esp | |
| 00000003 xchg ecx,edx | |
| 00000005 test edx,edx | |
| 00000007 jne 0000000D | |
| { | |
| return 0; | |
| 00000009 xor eax,eax | |
| 0000000b pop ebp | |
| 0000000c ret | |
| } | |
| if (x1 > 0) | |
| 0000000d test edx,edx | |
| 0000000f jle 00000018 | |
| { | |
| return x1 / x2; | |
| 00000011 mov eax,edx | |
| 00000013 cdq | |
| 00000014 idiv eax,ecx | |
| 00000016 pop ebp | |
| 00000017 ret | |
| } | |
| if (x2 > 0) | |
| 00000018 test ecx,ecx | |
| 0000001a jle 00000025 | |
| { | |
| return (x1 + 1) / x2 - 1; | |
| 0000001c inc edx | |
| 0000001d mov eax,edx | |
| 0000001f cdq | |
| 00000020 idiv eax,ecx | |
| 00000022 dec eax | |
| 00000023 pop ebp | |
| 00000024 ret | |
| } | |
| return (x1 + 1) / x2 + 1; | |
| 00000025 inc edx | |
| 00000026 mov eax,edx | |
| 00000028 cdq | |
| 00000029 idiv eax,ecx | |
| 0000002b inc eax | |
| 0000002c pop ebp | |
| 0000002d ret |
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