1 // SPDX-License-Identifier: GPL-2.0-only 2 /* ieee754 floating point arithmetic 3 * single and double precision 4 * 5 * BUGS 6 * not much dp done 7 * doesn't generate IEEE754_INEXACT 8 */ 9 /* 10 * MIPS floating point support 11 * Copyright (C) 1994-2000 Algorithmics Ltd. 12 */ 13 14 #include <linux/compiler.h> 15 16 #include "ieee754.h" 17 #include "ieee754sp.h" 18 #include "ieee754dp.h" 19 20 /* 21 * Special constants 22 */ 23 24 /* 25 * Older GCC requires the inner braces for initialization of union ieee754dp's 26 * anonymous struct member. Without an error will result. 27 */ 28 #define xPCNST(s, b, m, ebias) \ 29 { \ 30 { \ 31 .sign = (s), \ 32 .bexp = (b) + ebias, \ 33 .mant = (m) \ 34 } \ 35 } 36 37 #define DPCNST(s, b, m) \ 38 xPCNST(s, b, m, DP_EBIAS) 39 40 const union ieee754dp __ieee754dp_spcvals[] = { 41 DPCNST(0, DP_EMIN - 1, 0x0000000000000ULL), /* + zero */ 42 DPCNST(1, DP_EMIN - 1, 0x0000000000000ULL), /* - zero */ 43 DPCNST(0, 0, 0x0000000000000ULL), /* + 1.0 */ 44 DPCNST(1, 0, 0x0000000000000ULL), /* - 1.0 */ 45 DPCNST(0, 3, 0x4000000000000ULL), /* + 10.0 */ 46 DPCNST(1, 3, 0x4000000000000ULL), /* - 10.0 */ 47 DPCNST(0, DP_EMAX + 1, 0x0000000000000ULL), /* + infinity */ 48 DPCNST(1, DP_EMAX + 1, 0x0000000000000ULL), /* - infinity */ 49 DPCNST(0, DP_EMAX + 1, 0x7FFFFFFFFFFFFULL), /* + ind legacy qNaN */ 50 DPCNST(0, DP_EMAX + 1, 0x8000000000000ULL), /* + indef 2008 qNaN */ 51 DPCNST(0, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* + max */ 52 DPCNST(1, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* - max */ 53 DPCNST(0, DP_EMIN, 0x0000000000000ULL), /* + min normal */ 54 DPCNST(1, DP_EMIN, 0x0000000000000ULL), /* - min normal */ 55 DPCNST(0, DP_EMIN - 1, 0x0000000000001ULL), /* + min denormal */ 56 DPCNST(1, DP_EMIN - 1, 0x0000000000001ULL), /* - min denormal */ 57 DPCNST(0, 31, 0x0000000000000ULL), /* + 1.0e31 */ 58 DPCNST(0, 63, 0x0000000000000ULL), /* + 1.0e63 */ 59 }; 60 61 #define SPCNST(s, b, m) \ 62 xPCNST(s, b, m, SP_EBIAS) 63 64 const union ieee754sp __ieee754sp_spcvals[] = { 65 SPCNST(0, SP_EMIN - 1, 0x000000), /* + zero */ 66 SPCNST(1, SP_EMIN - 1, 0x000000), /* - zero */ 67 SPCNST(0, 0, 0x000000), /* + 1.0 */ 68 SPCNST(1, 0, 0x000000), /* - 1.0 */ 69 SPCNST(0, 3, 0x200000), /* + 10.0 */ 70 SPCNST(1, 3, 0x200000), /* - 10.0 */ 71 SPCNST(0, SP_EMAX + 1, 0x000000), /* + infinity */ 72 SPCNST(1, SP_EMAX + 1, 0x000000), /* - infinity */ 73 SPCNST(0, SP_EMAX + 1, 0x3FFFFF), /* + indef legacy quiet NaN */ 74 SPCNST(0, SP_EMAX + 1, 0x400000), /* + indef 2008 quiet NaN */ 75 SPCNST(0, SP_EMAX, 0x7FFFFF), /* + max normal */ 76 SPCNST(1, SP_EMAX, 0x7FFFFF), /* - max normal */ 77 SPCNST(0, SP_EMIN, 0x000000), /* + min normal */ 78 SPCNST(1, SP_EMIN, 0x000000), /* - min normal */ 79 SPCNST(0, SP_EMIN - 1, 0x000001), /* + min denormal */ 80 SPCNST(1, SP_EMIN - 1, 0x000001), /* - min denormal */ 81 SPCNST(0, 31, 0x000000), /* + 1.0e31 */ 82 SPCNST(0, 63, 0x000000), /* + 1.0e63 */ 83 }; 84