Created
October 19, 2016 20:59
-
-
Save senyai/3e4b6a9118418d1536476218459cd12d to your computer and use it in GitHub Desktop.
Assembler code for http://stackoverflow.com/questions/40138067/strange-uint32-t-to-float-array-conversion
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| ; Listing generated by Microsoft (R) Optimizing Compiler Version 19.00.24215.1 | |
| TITLE c:\users\senyai\documents\visual studio 2015\projects\cpp_test_2016\cpp_test_2016\cpp_test_2016.cpp | |
| .686P | |
| .XMM | |
| include listing.inc | |
| .model flat | |
| INCLUDELIB OLDNAMES | |
| PUBLIC ??_C@_02GIPFHKNO@OK?$AA@ ; `string' | |
| PUBLIC ??_C@_07PFIMAAAI@WTF?$DP?$DP?$CB?$CB?$AA@ ; `string' | |
| PUBLIC ??_C@_03OFAPEBGM@?$CFs?6?$AA@ ; `string' | |
| PUBLIC ??_C@_0BA@IANMDBIN@magic?5?$DN?5?$CF0?410f?6?$AA@ ; `string' | |
| PUBLIC ?_OptionsStorage@?1??__local_stdio_printf_options@@9@4_KA ; `__local_stdio_printf_options'::`2'::_OptionsStorage | |
| EXTRN __imp____stdio_common_vfprintf:PROC | |
| EXTRN __imp____acrt_iob_func:PROC | |
| EXTRN @__security_check_cookie@4:PROC | |
| ; COMDAT ?_OptionsStorage@?1??__local_stdio_printf_options@@9@4_KA | |
| _BSS SEGMENT | |
| ?_OptionsStorage@?1??__local_stdio_printf_options@@9@4_KA DQ 01H DUP (?) ; `__local_stdio_printf_options'::`2'::_OptionsStorage | |
| _BSS ENDS | |
| ; COMDAT ??_C@_0BA@IANMDBIN@magic?5?$DN?5?$CF0?410f?6?$AA@ | |
| CONST SEGMENT | |
| ??_C@_0BA@IANMDBIN@magic?5?$DN?5?$CF0?410f?6?$AA@ DB 'magic = %0.10f', 0aH | |
| DB 00H ; `string' | |
| CONST ENDS | |
| ; COMDAT ??_C@_03OFAPEBGM@?$CFs?6?$AA@ | |
| CONST SEGMENT | |
| ??_C@_03OFAPEBGM@?$CFs?6?$AA@ DB '%s', 0aH, 00H ; `string' | |
| CONST ENDS | |
| ; COMDAT ??_C@_07PFIMAAAI@WTF?$DP?$DP?$CB?$CB?$AA@ | |
| CONST SEGMENT | |
| ??_C@_07PFIMAAAI@WTF?$DP?$DP?$CB?$CB?$AA@ DB 'WTF??!!', 00H ; `string' | |
| CONST ENDS | |
| ; COMDAT ??_C@_02GIPFHKNO@OK?$AA@ | |
| CONST SEGMENT | |
| ??_C@_02GIPFHKNO@OK?$AA@ DB 'OK', 00H ; `string' | |
| CONST ENDS | |
| PUBLIC ??$__vcrt_va_start_verify_argument_type@QBD@@YAXXZ ; __vcrt_va_start_verify_argument_type<char const * const> | |
| PUBLIC _main | |
| PUBLIC _printf | |
| PUBLIC __vfprintf_l | |
| PUBLIC ___local_stdio_printf_options | |
| PUBLIC __xmm@41f00000000000000000000000000000 | |
| PUBLIC __xmm@4f8000004f8000004f8000004f800000 | |
| EXTRN __fltused:DWORD | |
| ; COMDAT __xmm@4f8000004f8000004f8000004f800000 | |
| CONST SEGMENT | |
| __xmm@4f8000004f8000004f8000004f800000 DB 00H, 00H, 080H, 'O', 00H, 00H, 080H | |
| DB 'O', 00H, 00H, 080H, 'O', 00H, 00H, 080H, 'O' | |
| CONST ENDS | |
| ; COMDAT __xmm@41f00000000000000000000000000000 | |
| CONST SEGMENT | |
| __xmm@41f00000000000000000000000000000 DB 00H, 00H, 00H, 00H, 00H, 00H, 00H | |
| DB 00H, 00H, 00H, 00H, 00H, 00H, 00H, 0f0H, 'A' | |
| CONST ENDS | |
| ; Function compile flags: /Ogtp | |
| ; File c:\users\senyai\documents\visual studio 2015\projects\cpp_test_2016\cpp_test_2016\cpp_test_2016.cpp | |
| ; COMDAT _main | |
| _TEXT SEGMENT | |
| _arr_dst$ = -1040 ; size = 516 | |
| _arr$ = -520 ; size = 516 | |
| _main PROC ; COMDAT | |
| ; 7 : { | |
| 00000 55 push ebp | |
| 00001 8b ec mov ebp, esp | |
| 00003 83 e4 c0 and esp, -64 ; ffffffc0H | |
| 00006 0f 28 1d 00 00 | |
| 00 00 movaps xmm3, XMMWORD PTR __xmm@4f8000004f8000004f8000004f800000 | |
| 0000d 81 ec 3c 04 00 | |
| 00 sub esp, 1084 ; 0000043cH | |
| ; 8 : uint32_t value = 2570980487; | |
| ; 9 : | |
| ; 10 : uint32_t arr[ARR_SIZE]; | |
| ; 11 : for (int x = 0; x < ARR_SIZE; ++x) | |
| ; 12 : arr[x] = value; | |
| 00013 ba 81 00 00 00 mov edx, 129 ; 00000081H | |
| 00018 b8 87 0c 3e 99 mov eax, -1723986809 ; 993e0c87H | |
| 0001d 8b ca mov ecx, edx | |
| 0001f 0f 57 d2 xorps xmm2, xmm2 | |
| 00022 57 push edi | |
| 00023 8d bc 24 38 02 | |
| 00 00 lea edi, DWORD PTR _arr$[esp+1088] | |
| 0002a f3 ab rep stosd | |
| ; 13 : | |
| ; 14 : float arr_dst[ARR_SIZE]; | |
| ; 15 : for (int x = 0; x < ARR_SIZE; ++x) | |
| 0002c 33 c9 xor ecx, ecx | |
| 0002e 66 90 npad 2 | |
| $LL7@main: | |
| ; 16 : { | |
| ; 17 : arr_dst[x] = static_cast<float>(arr[x]); | |
| 00030 0f 10 84 8c 38 | |
| 02 00 00 movups xmm0, XMMWORD PTR _arr$[esp+ecx*4+1088] | |
| 00038 0f 5b c8 cvtdq2ps xmm1, xmm0 | |
| 0003b 0f 28 c1 movaps xmm0, xmm1 | |
| 0003e 0f c2 c2 01 cmpltps xmm0, xmm2 | |
| 00042 0f 54 c3 andps xmm0, xmm3 | |
| 00045 0f 58 c1 addps xmm0, xmm1 | |
| 00048 0f 11 44 8c 30 movups XMMWORD PTR _arr_dst$[esp+ecx*4+1088], xmm0 | |
| 0004d 0f 10 84 8c 48 | |
| 02 00 00 movups xmm0, XMMWORD PTR _arr$[esp+ecx*4+1104] | |
| 00055 0f 5b c8 cvtdq2ps xmm1, xmm0 | |
| 00058 0f 28 c1 movaps xmm0, xmm1 | |
| 0005b 0f c2 c2 01 cmpltps xmm0, xmm2 | |
| 0005f 0f 54 c3 andps xmm0, xmm3 | |
| 00062 0f 58 c1 addps xmm0, xmm1 | |
| 00065 0f 11 44 8c 40 movups XMMWORD PTR _arr_dst$[esp+ecx*4+1104], xmm0 | |
| 0006a 83 c1 08 add ecx, 8 | |
| 0006d 81 f9 80 00 00 | |
| 00 cmp ecx, 128 ; 00000080H | |
| 00073 72 bb jb SHORT $LL7@main | |
| 00075 3b ca cmp ecx, edx | |
| 00077 0f 83 f1 00 00 | |
| 00 jae $LN21@main | |
| 0007d 2b d1 sub edx, ecx | |
| ; 13 : | |
| ; 14 : float arr_dst[ARR_SIZE]; | |
| ; 15 : for (int x = 0; x < ARR_SIZE; ++x) | |
| 0007f 83 fa 04 cmp edx, 4 | |
| 00082 0f 82 a8 00 00 | |
| 00 jb $LC22@main | |
| 00088 0f 1f 84 00 00 | |
| 00 00 00 npad 8 | |
| $LL23@main: | |
| ; 16 : { | |
| ; 17 : arr_dst[x] = static_cast<float>(arr[x]); | |
| 00090 8b 84 8c 38 02 | |
| 00 00 mov eax, DWORD PTR _arr$[esp+ecx*4+1088] | |
| 00097 66 0f 6e c0 movd xmm0, eax | |
| 0009b f3 0f e6 c0 cvtdq2pd xmm0, xmm0 | |
| 0009f c1 e8 1f shr eax, 31 ; 0000001fH | |
| 000a2 f2 0f 58 04 c5 | |
| 00 00 00 00 addsd xmm0, QWORD PTR __xmm@41f00000000000000000000000000000[eax*8] | |
| 000ab 8b 84 8c 3c 02 | |
| 00 00 mov eax, DWORD PTR _arr$[esp+ecx*4+1092] | |
| 000b2 66 0f 5a c0 cvtpd2ps xmm0, xmm0 | |
| 000b6 f3 0f 11 44 8c | |
| 30 movss DWORD PTR _arr_dst$[esp+ecx*4+1088], xmm0 | |
| 000bc 66 0f 6e c0 movd xmm0, eax | |
| 000c0 f3 0f e6 c0 cvtdq2pd xmm0, xmm0 | |
| 000c4 c1 e8 1f shr eax, 31 ; 0000001fH | |
| 000c7 f2 0f 58 04 c5 | |
| 00 00 00 00 addsd xmm0, QWORD PTR __xmm@41f00000000000000000000000000000[eax*8] | |
| 000d0 8b 84 8c 40 02 | |
| 00 00 mov eax, DWORD PTR _arr$[esp+ecx*4+1096] | |
| 000d7 66 0f 5a c0 cvtpd2ps xmm0, xmm0 | |
| 000db f3 0f 11 44 8c | |
| 34 movss DWORD PTR _arr_dst$[esp+ecx*4+1092], xmm0 | |
| 000e1 66 0f 6e c0 movd xmm0, eax | |
| 000e5 f3 0f e6 c0 cvtdq2pd xmm0, xmm0 | |
| 000e9 c1 e8 1f shr eax, 31 ; 0000001fH | |
| 000ec f2 0f 58 04 c5 | |
| 00 00 00 00 addsd xmm0, QWORD PTR __xmm@41f00000000000000000000000000000[eax*8] | |
| 000f5 8b 84 8c 44 02 | |
| 00 00 mov eax, DWORD PTR _arr$[esp+ecx*4+1100] | |
| 000fc 66 0f 5a c0 cvtpd2ps xmm0, xmm0 | |
| 00100 f3 0f 11 44 8c | |
| 38 movss DWORD PTR _arr_dst$[esp+ecx*4+1096], xmm0 | |
| 00106 66 0f 6e c0 movd xmm0, eax | |
| 0010a f3 0f e6 c0 cvtdq2pd xmm0, xmm0 | |
| 0010e c1 e8 1f shr eax, 31 ; 0000001fH | |
| 00111 f2 0f 58 04 c5 | |
| 00 00 00 00 addsd xmm0, QWORD PTR __xmm@41f00000000000000000000000000000[eax*8] | |
| 0011a 66 0f 5a c0 cvtpd2ps xmm0, xmm0 | |
| 0011e f3 0f 11 44 8c | |
| 3c movss DWORD PTR _arr_dst$[esp+ecx*4+1100], xmm0 | |
| 00124 83 c1 04 add ecx, 4 | |
| 00127 83 f9 7e cmp ecx, 126 ; 0000007eH | |
| 0012a 0f 82 60 ff ff | |
| ff jb $LL23@main | |
| $LC22@main: | |
| ; 13 : | |
| ; 14 : float arr_dst[ARR_SIZE]; | |
| ; 15 : for (int x = 0; x < ARR_SIZE; ++x) | |
| 00130 81 f9 81 00 00 | |
| 00 cmp ecx, 129 ; 00000081H | |
| 00136 73 36 jae SHORT $LN21@main | |
| 00138 0f 1f 84 00 00 | |
| 00 00 00 npad 8 | |
| $LC15@main: | |
| ; 16 : { | |
| ; 17 : arr_dst[x] = static_cast<float>(arr[x]); | |
| 00140 8b 84 8c 38 02 | |
| 00 00 mov eax, DWORD PTR _arr$[esp+ecx*4+1088] | |
| 00147 66 0f 6e c0 movd xmm0, eax | |
| 0014b f3 0f e6 c0 cvtdq2pd xmm0, xmm0 | |
| 0014f c1 e8 1f shr eax, 31 ; 0000001fH | |
| 00152 f2 0f 58 04 c5 | |
| 00 00 00 00 addsd xmm0, QWORD PTR __xmm@41f00000000000000000000000000000[eax*8] | |
| 0015b 66 0f 5a c0 cvtpd2ps xmm0, xmm0 | |
| 0015f f3 0f 11 44 8c | |
| 30 movss DWORD PTR _arr_dst$[esp+ecx*4+1088], xmm0 | |
| 00165 41 inc ecx | |
| 00166 81 f9 81 00 00 | |
| 00 cmp ecx, 129 ; 00000081H | |
| 0016c 72 d2 jb SHORT $LC15@main | |
| $LN21@main: | |
| ; 18 : } | |
| ; 19 : | |
| ; 20 : printf("%s\n", arr_dst[ARR_SIZE - 1] == arr_dst[ARR_SIZE - 2] ? "OK" : "WTF??!!"); | |
| 0016e f3 0f 10 84 24 | |
| 30 02 00 00 movss xmm0, DWORD PTR _arr_dst$[esp+1600] | |
| 00177 0f 2e 84 24 2c | |
| 02 00 00 ucomiss xmm0, DWORD PTR _arr_dst$[esp+1596] | |
| 0017f 9f lahf | |
| 00180 f6 c4 44 test ah, 68 ; 00000044H | |
| 00183 b8 00 00 00 00 mov eax, OFFSET ??_C@_02GIPFHKNO@OK?$AA@ | |
| 00188 7b 05 jnp SHORT $LN10@main | |
| 0018a b8 00 00 00 00 mov eax, OFFSET ??_C@_07PFIMAAAI@WTF?$DP?$DP?$CB?$CB?$AA@ | |
| $LN10@main: | |
| 0018f 50 push eax | |
| 00190 68 00 00 00 00 push OFFSET ??_C@_03OFAPEBGM@?$CFs?6?$AA@ | |
| 00195 e8 00 00 00 00 call _printf | |
| 0019a f3 0f 10 84 24 | |
| 34 02 00 00 movss xmm0, DWORD PTR _arr_dst$[esp+1604] | |
| ; 21 : | |
| ; 22 : printf("magic = %0.10f\n", arr_dst[ARR_SIZE - 2]); | |
| 001a3 0f 5a c0 cvtps2pd xmm0, xmm0 | |
| 001a6 f2 0f 11 04 24 movsd QWORD PTR [esp], xmm0 | |
| 001ab 68 00 00 00 00 push OFFSET ??_C@_0BA@IANMDBIN@magic?5?$DN?5?$CF0?410f?6?$AA@ | |
| 001b0 e8 00 00 00 00 call _printf | |
| 001b5 f3 0f 10 84 24 | |
| 3c 02 00 00 movss xmm0, DWORD PTR _arr_dst$[esp+1612] | |
| ; 23 : printf("magic = %0.10f\n", arr_dst[ARR_SIZE - 1]); | |
| 001be 83 c4 04 add esp, 4 | |
| 001c1 0f 5a c0 cvtps2pd xmm0, xmm0 | |
| 001c4 f2 0f 11 04 24 movsd QWORD PTR [esp], xmm0 | |
| 001c9 68 00 00 00 00 push OFFSET ??_C@_0BA@IANMDBIN@magic?5?$DN?5?$CF0?410f?6?$AA@ | |
| 001ce e8 00 00 00 00 call _printf | |
| 001d3 83 c4 0c add esp, 12 ; 0000000cH | |
| ; 24 : return 0; | |
| 001d6 33 c0 xor eax, eax | |
| ; 25 : } | |
| 001d8 5f pop edi | |
| 001d9 8b e5 mov esp, ebp | |
| 001db 5d pop ebp | |
| 001dc c3 ret 0 | |
| _main ENDP | |
| _TEXT ENDS | |
| END |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment