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