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059b823e70
The magnitude range of normalized _Float16 is 2^-14 (~6e-5) to
(2-2^-10)*2^15 (65504). You might think, then, that the code is
correct to defne FLT16_MIN_EXP and FLT16_MAX_EXP to be -14 and 15
respectively. However, for some reason the C specification actually
specifies a bias for these macros:
C11 5.2.4.2.2:
- minimum negative integer such that FLT_RADIX raised to one less than
that power is a normalized floating-point number, e_min:
FLT_MIN_EXP
DBL_MIN_EXP
LDBL_MIN_EXP
- maximum integer such that FLT_RADIX raised to one less than that
power is a representable finite floating-point number, e_max:
FLT_MAX_EXP
DBL_MAX_EXP
LDBL_MAX_EXP
FLT16_MIN_EXP and FLT16_MAX_EXP should clearly be biased the same way,
and other compilers do in fact do so, as do our OpenCL headers for `half`.
Additionally, FLT16_MIN_10_EXP is just wrong.
llvm-svn: 362183
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
// RUN: %clang_cc1 -triple=aarch64-none-none -fsyntax-only -verify -std=c89 \
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// RUN: -ffreestanding %s
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// RUN: %clang_cc1 -triple=aarch64-none-none -fsyntax-only -verify \
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// RUN: -std=c99 -ffreestanding %s
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// RUN: %clang_cc1 -triple=aarch64-none-none -fsyntax-only -verify -std=c11 \
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// RUN: -ffreestanding %s
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// RUN: %clang_cc1 -triple=aarch64-none-none -fsyntax-only -verify \
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// RUN: -std=c++11 -x c++ -ffreestanding %s
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// expected-no-diagnostics
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#define __STDC_WANT_IEC_60559_TYPES_EXT__
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#include <float.h>
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#ifndef FLT16_MIN_10_EXP
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#error "Macro FLT16_MIN_10_EXP is missing."
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#elif FLT16_MIN_10_EXP > -4
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#error "Macro FLT16_MIN_10_EXP is invalid."
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#endif
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_Static_assert(FLT16_MIN_10_EXP == __FLT16_MIN_10_EXP__, "");
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#ifndef FLT16_MIN_EXP
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#error "Macro FLT16_MIN_EXP is missing."
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#elif FLT16_MIN_EXP > -13
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#error "Macro FLT16_MIN_EXP is invalid."
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#endif
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_Static_assert(FLT16_MIN_EXP == __FLT16_MIN_EXP__, "");
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#ifndef FLT16_MAX_10_EXP
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#error "Macro FLT16_MAX_10_EXP is missing."
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#elif FLT16_MAX_10_EXP < 4
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#error "Macro FLT16_MAX_10_EXP is invalid."
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#endif
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_Static_assert(FLT16_MAX_10_EXP == __FLT16_MAX_10_EXP__, "");
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#ifndef FLT16_MAX_EXP
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#error "Macro FLT16_MAX_EXP is missing."
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#elif FLT16_MAX_EXP < 16
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#error "Macro FLT16_MAX_EXP is invalid."
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#endif
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_Static_assert(FLT16_MAX_EXP == __FLT16_MAX_EXP__, "");
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#ifndef FLT16_DECIMAL_DIG
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#error "Macro FLT16_DECIMAL_DIG is missing."
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#elif FLT16_DECIMAL_DIG < 5
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#error "Macro FLT16_DECIMAL_DIG is invalid."
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#endif
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_Static_assert(FLT16_DECIMAL_DIG == __FLT16_DECIMAL_DIG__, "");
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#ifndef FLT16_DIG
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#error "Macro FLT16_DIG is missing."
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#elif FLT16_DIG < 3
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#error "Macro FLT16_DIG is invalid."
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#endif
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_Static_assert(FLT16_DIG == __FLT16_DIG__, "");
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#ifndef FLT16_MANT_DIG
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#error "Macro FLT16_MANT_DIG is missing."
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#elif FLT16_MANT_DIG < 11
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#error "Macro FLT16_MANT_DIG is invalid."
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#endif
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_Static_assert(FLT16_MANT_DIG == __FLT16_MANT_DIG__, "");
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