1 //===-- int_to_fp.h - integer to floating point conversion ----------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // Set source and destination defines in order to use a correctly 10 // parameterised floatXiYf implementation. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef INT_TO_FP_H 15 #define INT_TO_FP_H 16 17 #include "int_lib.h" 18 19 #if defined SRC_I64 20 typedef int64_t src_t; 21 typedef uint64_t usrc_t; 22 static __inline int clzSrcT(usrc_t x) { return __builtin_clzll(x); } 23 24 #elif defined SRC_U64 25 typedef uint64_t src_t; 26 typedef uint64_t usrc_t; 27 static __inline int clzSrcT(usrc_t x) { return __builtin_clzll(x); } 28 29 #elif defined SRC_I128 30 typedef __int128_t src_t; 31 typedef __uint128_t usrc_t; 32 static __inline int clzSrcT(usrc_t x) { return __clzti2(x); } 33 34 #elif defined SRC_U128 35 typedef __uint128_t src_t; 36 typedef __uint128_t usrc_t; 37 static __inline int clzSrcT(usrc_t x) { return __clzti2(x); } 38 39 #else 40 #error Source should be a handled integer type. 41 #endif 42 43 #if defined DST_SINGLE 44 typedef float dst_t; 45 typedef uint32_t dst_rep_t; 46 #define DST_REP_C UINT32_C 47 48 enum { 49 dstSigBits = 23, 50 }; 51 52 #elif defined DST_DOUBLE 53 typedef double dst_t; 54 typedef uint64_t dst_rep_t; 55 #define DST_REP_C UINT64_C 56 57 enum { 58 dstSigBits = 52, 59 }; 60 61 #elif defined DST_QUAD 62 typedef tf_float dst_t; 63 typedef __uint128_t dst_rep_t; 64 #define DST_REP_C (__uint128_t) 65 66 enum { 67 dstSigBits = 112, 68 }; 69 70 #else 71 #error Destination should be a handled floating point type 72 #endif 73 74 static __inline dst_t dstFromRep(dst_rep_t x) { 75 const union { 76 dst_t f; 77 dst_rep_t i; 78 } rep = {.i = x}; 79 return rep.f; 80 } 81 82 #endif // INT_TO_FP_H 83