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(a: 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 | |