mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-29 15:06:10 +00:00
911cfc11c4
__inline is a vendor specific spelling for inline. clang and gcc treat it the same as inline, and is available in MSVC 2013 which does not implement C99 (VS2015 supports the inline keyword though). This will allow us to build the builtins using MSVC. llvm-svn: 249953
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
//===-lib/fp_extend.h - low precision -> high precision conversion -*- C -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Set source and destination setting
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef FP_EXTEND_HEADER
|
|
#define FP_EXTEND_HEADER
|
|
|
|
#include "int_lib.h"
|
|
|
|
#if defined SRC_SINGLE
|
|
typedef float src_t;
|
|
typedef uint32_t src_rep_t;
|
|
#define SRC_REP_C UINT32_C
|
|
static const int srcSigBits = 23;
|
|
#define src_rep_t_clz __builtin_clz
|
|
|
|
#elif defined SRC_DOUBLE
|
|
typedef double src_t;
|
|
typedef uint64_t src_rep_t;
|
|
#define SRC_REP_C UINT64_C
|
|
static const int srcSigBits = 52;
|
|
static __inline int src_rep_t_clz(src_rep_t a) {
|
|
#if defined __LP64__
|
|
return __builtin_clzl(a);
|
|
#else
|
|
if (a & REP_C(0xffffffff00000000))
|
|
return __builtin_clz(a >> 32);
|
|
else
|
|
return 32 + __builtin_clz(a & REP_C(0xffffffff));
|
|
#endif
|
|
}
|
|
|
|
#elif defined SRC_HALF
|
|
typedef uint16_t src_t;
|
|
typedef uint16_t src_rep_t;
|
|
#define SRC_REP_C UINT16_C
|
|
static const int srcSigBits = 10;
|
|
#define src_rep_t_clz __builtin_clz
|
|
|
|
#else
|
|
#error Source should be half, single, or double precision!
|
|
#endif //end source precision
|
|
|
|
#if defined DST_SINGLE
|
|
typedef float dst_t;
|
|
typedef uint32_t dst_rep_t;
|
|
#define DST_REP_C UINT32_C
|
|
static const int dstSigBits = 23;
|
|
|
|
#elif defined DST_DOUBLE
|
|
typedef double dst_t;
|
|
typedef uint64_t dst_rep_t;
|
|
#define DST_REP_C UINT64_C
|
|
static const int dstSigBits = 52;
|
|
|
|
#elif defined DST_QUAD
|
|
typedef long double dst_t;
|
|
typedef __uint128_t dst_rep_t;
|
|
#define DST_REP_C (__uint128_t)
|
|
static const int dstSigBits = 112;
|
|
|
|
#else
|
|
#error Destination should be single, double, or quad precision!
|
|
#endif //end destination precision
|
|
|
|
// End of specialization parameters. Two helper routines for conversion to and
|
|
// from the representation of floating-point data as integer values follow.
|
|
|
|
static __inline src_rep_t srcToRep(src_t x) {
|
|
const union { src_t f; src_rep_t i; } rep = {.f = x};
|
|
return rep.i;
|
|
}
|
|
|
|
static __inline dst_t dstFromRep(dst_rep_t x) {
|
|
const union { dst_t f; dst_rep_t i; } rep = {.i = x};
|
|
return rep.f;
|
|
}
|
|
// End helper routines. Conversion implementation follows.
|
|
|
|
#endif //FP_EXTEND_HEADER
|