+++ /dev/null
-/** @file\r
- Program to generate an arith.h for use with the gdtoa binary to decimal and decimal to binary\r
- conversion library.\r
-\r
- Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>\r
- This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
- Copyright (C) 1997, 1998 Lucent Technologies\r
- All Rights Reserved\r
-\r
- Permission to use, copy, modify, and distribute this software and\r
- its documentation for any purpose and without fee is hereby\r
- granted, provided that the above copyright notice appear in all\r
- copies and that both that the copyright notice and this\r
- permission notice and warranty disclaimer appear in supporting\r
- documentation, and that the name of Lucent or any of its entities\r
- not be used in advertising or publicity pertaining to\r
- distribution of the software without specific, written prior\r
- permission.\r
-\r
- LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,\r
- INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.\r
- IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY\r
- SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES\r
- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER\r
- IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,\r
- ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF\r
- THIS SOFTWARE.\r
-\r
- NetBSD: arithchk.c,v 1.2 2006/01/25 15:27:42 kleink Exp\r
-****************************************************************/\r
-#include <sys/EfiCdefs.h>\r
-\r
-/* Try to deduce arith.h from arithmetic properties. */\r
-\r
-#include <stdio.h>\r
-\r
-static int dalign;\r
-\r
-typedef struct Akind {\r
- char *name;\r
- int kind;\r
-} Akind;\r
-\r
-static Akind IEEE_LITTLE_ENDIAN = { "IEEE_LITTLE_ENDIAN", 1 };\r
-static Akind IEEE_BIG_ENDIAN = { "IEEE_BIG_ENDIAN", 2 };\r
-static Akind IBM = { "IBM", 3 };\r
-static Akind VAX = { "VAX", 4 };\r
-static Akind CRAY = { "CRAY", 5};\r
-\r
-static Akind *\r
-Lcheck()\r
-{\r
- union {\r
- double d;\r
- long L[2];\r
- } u;\r
- struct {\r
- double d;\r
- long L;\r
- } x[2];\r
-\r
- if (sizeof(x) > 2*(sizeof(double) + sizeof(long)))\r
- dalign = 1;\r
- u.L[0] = u.L[1] = 0;\r
- u.d = 1e13;\r
- if (u.L[0] == 1117925532 && u.L[1] == -448790528)\r
- return &IEEE_BIG_ENDIAN;\r
- if (u.L[1] == 1117925532 && u.L[0] == -448790528)\r
- return &IEEE_LITTLE_ENDIAN;\r
- if (u.L[0] == -2065213935 && u.L[1] == 10752)\r
- return &VAX;\r
- if (u.L[0] == 1267827943 && u.L[1] == 704643072)\r
- return &IBM;\r
- return 0;\r
- }\r
-\r
- static Akind *\r
-icheck()\r
-{\r
- union {\r
- double d;\r
- int L[2];\r
- } u;\r
- struct {\r
- double d;\r
- int L;\r
- } x[2];\r
-\r
- if (sizeof(x) > 2*(sizeof(double) + sizeof(int)))\r
- dalign = 1;\r
- u.L[0] = u.L[1] = 0;\r
- u.d = 1e13;\r
- if (u.L[0] == 1117925532 && u.L[1] == -448790528)\r
- return &IEEE_BIG_ENDIAN;\r
- if (u.L[1] == 1117925532 && u.L[0] == -448790528)\r
- return &IEEE_LITTLE_ENDIAN;\r
- if (u.L[0] == -2065213935 && u.L[1] == 10752)\r
- return &VAX;\r
- if (u.L[0] == 1267827943 && u.L[1] == 704643072)\r
- return &IBM;\r
- return 0;\r
- }\r
-\r
-char *emptyfmt = ""; /* avoid possible warning message with printf("") */\r
-\r
- static Akind *\r
-ccheck()\r
-{\r
- union {\r
- double d;\r
- long L;\r
- } u;\r
- long Cray1;\r
-\r
- /* Cray1 = 4617762693716115456 -- without overflow on non-Crays */\r
- Cray1 = printf(emptyfmt) < 0 ? 0 : 4617762;\r
- if (printf(emptyfmt, Cray1) >= 0)\r
- Cray1 = 1000000*Cray1 + 693716;\r
- if (printf(emptyfmt, Cray1) >= 0)\r
- Cray1 = 1000000*Cray1 + 115456;\r
- u.d = 1e13;\r
- if (u.L == Cray1)\r
- return &CRAY;\r
- return 0;\r
- }\r
-\r
- static int\r
-fzcheck()\r
-{\r
- double a, b;\r
- int i;\r
-\r
- a = 1.;\r
- b = .1;\r
- for(i = 155;; b *= b, i >>= 1) {\r
- if (i & 1) {\r
- a *= b;\r
- if (i == 1)\r
- break;\r
- }\r
- }\r
- b = a * a;\r
- return b == 0.;\r
- }\r
-\r
- int\r
-main()\r
-{\r
- Akind *a = 0;\r
- int Ldef = 0;\r
- FILE *f;\r
-\r
-#ifdef WRITE_ARITH_H /* for Symantec's buggy "make" */\r
- f = fopen("arith.h", "w");\r
- if (!f) {\r
- printf("Cannot open arith.h\n");\r
- return 1;\r
- }\r
-#else\r
- f = stdout;\r
-#endif\r
-\r
- if (sizeof(double) == 2*sizeof(long))\r
- a = Lcheck();\r
- else if (sizeof(double) == 2*sizeof(int)) {\r
- Ldef = 1;\r
- a = icheck();\r
- }\r
- else if (sizeof(double) == sizeof(long))\r
- a = ccheck();\r
- if (a) {\r
- fprintf(f, "#define %s\n#define Arith_Kind_ASL %d\n",\r
- a->name, a->kind);\r
- if (Ldef)\r
- fprintf(f, "#define Long int\n#define Intcast (int)(long)\n");\r
- if (dalign)\r
- fprintf(f, "#define Double_Align\n");\r
- if (sizeof(char*) == 8)\r
- fprintf(f, "#define X64_bit_pointers\n");\r
-#ifndef NO_LONG_LONG\r
- if (sizeof(long long) < 8)\r
-#endif\r
- fprintf(f, "#define NO_LONG_LONG\n");\r
- if (a->kind <= 2 && fzcheck())\r
- fprintf(f, "#define Sudden_Underflow\n");\r
- return 0;\r
- }\r
- fprintf(f, "/* Unknown arithmetic */\n");\r
- return 1;\r
- }\r
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