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https://github.com/boostorg/math.git
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To <cstdfloat.hpp>, add support for tiny floats float16_t and float24_t.
This commit is contained in:
Christopher Kormanyos
@@ -36,6 +36,8 @@
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 0
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#define BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE 0
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#define BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE 0
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#define BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE 0
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#define BOOST_CSTDFLOAT_HAS_FLOAT64_NATIVE_TYPE 0
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#define BOOST_CSTDFLOAT_HAS_FLOAT80_NATIVE_TYPE 0
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@@ -46,9 +48,27 @@
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#error The compiler does not support radix-2 floating-point types required for <cstdfloat.hpp>.
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#endif
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// Check if built-in float is equivalent to float32_t, float64_t, float80_t, or float128_t.
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// Check if built-in float is equivalent to float16_t, float24_t, float32_t, float64_t, float80_t, or float128_t.
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#if(defined(FLT_MANT_DIG) && defined(FLT_MAX_EXP))
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#if ((FLT_MANT_DIG == 24) && (FLT_MAX_EXP == 128) && (BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 0))
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#if ((FLT_MANT_DIG == 11) && (FLT_MAX_EXP == 16) && (BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE == 0))
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#define BOOST_CSTDFLOAT_FLOAT16_NATIVE_TYPE float
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#undef BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 16
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#undef BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE
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#define BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE 1
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#define BOOST_FLOAT16_C(x) (x ## F)
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#define BOOST_FLOAT_16_MIN FLT_MIN
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#define BOOST_FLOAT_16_MAX FLT_MAX
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#elif((FLT_MANT_DIG == 16) && (FLT_MAX_EXP == 64) && (BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE == 0))
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#define BOOST_CSTDFLOAT_FLOAT24_NATIVE_TYPE float
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#undef BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 24
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#undef BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE
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#define BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE 1
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#define BOOST_FLOAT24_C(x) (x ## F)
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#define BOOST_FLOAT_24_MIN FLT_MIN
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#define BOOST_FLOAT_24_MAX FLT_MAX
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#elif((FLT_MANT_DIG == 24) && (FLT_MAX_EXP == 128) && (BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 0))
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#define BOOST_CSTDFLOAT_FLOAT32_NATIVE_TYPE float
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#undef BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 32
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@@ -87,9 +107,27 @@
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#endif
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#endif
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// Check if built-in double is equivalent to float32_t, float64_t, float80_t, or float128_t.
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// Check if built-in double is equivalent to float16_t, float24_t, float32_t, float64_t, float80_t, or float128_t.
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#if(defined(DBL_MANT_DIG) && defined(DBL_MAX_EXP))
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#if ((DBL_MANT_DIG == 24) && (DBL_MAX_EXP == 128) && (BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 0))
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#if ((DBL_MANT_DIG == 11) && (DBL_MAX_EXP == 16) && (BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE == 0))
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#define BOOST_CSTDFLOAT_FLOAT16_NATIVE_TYPE double
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#undef BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 16
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#undef BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE
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#define BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE 1
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#define BOOST_FLOAT16_C(x) (x)
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#define BOOST_FLOAT_16_MIN DBL_MIN
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#define BOOST_FLOAT_16_MAX DBL_MAX
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#elif((DBL_MANT_DIG == 16) && (DBL_MAX_EXP == 64) && (BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE == 0))
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#define BOOST_CSTDFLOAT_FLOAT24_NATIVE_TYPE double
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#undef BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 24
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#undef BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE
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#define BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE 1
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#define BOOST_FLOAT24_C(x) (x)
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#define BOOST_FLOAT_24_MIN DBL_MIN
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#define BOOST_FLOAT_24_MAX DBL_MAX
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#elif((DBL_MANT_DIG == 24) && (DBL_MAX_EXP == 128) && (BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 0))
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#define BOOST_CSTDFLOAT_FLOAT32_NATIVE_TYPE double
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#undef BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 32
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@@ -128,9 +166,27 @@
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#endif
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#endif
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// Check if built-in long double is equivalent to float32_t, float64_t, float80_t, or float128_t.
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// Check if built-in long double is equivalent to float16_t, float24_t, float32_t, float64_t, float80_t, or float128_t.
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#if(defined(LDBL_MANT_DIG) && defined(LDBL_MAX_EXP))
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#if ((LDBL_MANT_DIG == 24) && (LDBL_MAX_EXP == 128) && (BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 0))
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#if ((LDBL_MANT_DIG == 11) && (LDBL_MAX_EXP == 16) && (BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE == 0))
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#define BOOST_CSTDFLOAT_FLOAT16_NATIVE_TYPE long double
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#undef BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 16
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#undef BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE
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#define BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE 1
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#define BOOST_FLOAT16_C(x) (x ## L)
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#define BOOST_FLOAT_16_MIN LDBL_MIN
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#define BOOST_FLOAT_16_MAX LDBL_MAX
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#elif((LDBL_MANT_DIG == 16) && (LDBL_MAX_EXP == 64) && (BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE == 0))
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#define BOOST_CSTDFLOAT_FLOAT24_NATIVE_TYPE long double
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#undef BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 24
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#undef BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE
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#define BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE 1
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#define BOOST_FLOAT24_C(x) (x ## L)
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#define BOOST_FLOAT_24_MIN LDBL_MIN
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#define BOOST_FLOAT_24_MAX LDBL_MAX
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#elif((LDBL_MANT_DIG == 24) && (LDBL_MAX_EXP == 128) && (BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 0))
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#define BOOST_CSTDFLOAT_FLOAT32_NATIVE_TYPE long double
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#undef BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH
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#define BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH 32
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@@ -187,7 +243,9 @@
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// of the queries that have been obtained in the preamble.
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// Ensure that the compiler has any suitable floating-point type whatsoever.
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#if ( (BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 0) \
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#if ( (BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE == 0) \
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&& (BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE == 0) \
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&& (BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 0) \
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&& (BOOST_CSTDFLOAT_HAS_FLOAT64_NATIVE_TYPE == 0) \
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&& (BOOST_CSTDFLOAT_HAS_FLOAT80_NATIVE_TYPE == 0) \
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&& (BOOST_CSTDFLOAT_HAS_FLOAT128_NATIVE_TYPE == 0))
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@@ -197,6 +255,20 @@
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// The following section contains the various min/max macros
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// for the *leastN and *fastN types.
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#if(BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE == 1)
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#define BOOST_FLOAT_FAST16_MIN BOOST_FLOAT_16_MIN
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#define BOOST_FLOAT_LEAST16_MIN BOOST_FLOAT_16_MIN
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#define BOOST_FLOAT_FAST16_MAX BOOST_FLOAT_16_MAX
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#define BOOST_FLOAT_LEAST16_MAX BOOST_FLOAT_16_MAX
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#endif
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#if(BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE == 1)
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#define BOOST_FLOAT_FAST24_MIN BOOST_FLOAT_24_MIN
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#define BOOST_FLOAT_LEAST24_MIN BOOST_FLOAT_24_MIN
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#define BOOST_FLOAT_FAST24_MAX BOOST_FLOAT_24_MAX
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#define BOOST_FLOAT_LEAST24_MAX BOOST_FLOAT_24_MAX
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#endif
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#if(BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 1)
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#define BOOST_FLOAT_FAST32_MIN BOOST_FLOAT_32_MIN
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#define BOOST_FLOAT_LEAST32_MIN BOOST_FLOAT_32_MIN
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@@ -228,36 +300,26 @@
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// The following section contains the various min/max macros
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// for the *floatmax types.
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// In addition, all unused pre-processor definitions are
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// herewith un-defined.
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#if (BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 32)
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#if (BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 16)
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#define BOOST_FLOATMAX_C(x) BOOST_FLOAT16_C(x)
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#define BOOST_FLOATMAX_MIN BOOST_FLOAT_16_MIN
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#define BOOST_FLOATMAX_MAX BOOST_FLOAT_16_MAX
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#elif(BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 24)
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#define BOOST_FLOATMAX_C(x) BOOST_FLOAT24_C(x)
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#define BOOST_FLOATMAX_MIN BOOST_FLOAT_24_MIN
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#define BOOST_FLOATMAX_MAX BOOST_FLOAT_24_MAX
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#elif(BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 32)
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#define BOOST_FLOATMAX_C(x) BOOST_FLOAT32_C(x)
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#define BOOST_FLOATMAX_MIN BOOST_FLOAT_32_MIN
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#define BOOST_FLOATMAX_MAX BOOST_FLOAT_32_MAX
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#undef BOOST_CSTDFLOAT_FLOAT64_NATIVE_TYPE
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#undef BOOST_CSTDFLOAT_FLOAT80_NATIVE_TYPE
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#undef BOOST_CSTDFLOAT_FLOAT128_NATIVE_TYPE
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#undef BOOST_FLOAT64_C
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#undef BOOST_FLOAT80_C
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#undef BOOST_FLOAT128_C
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#elif(BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 64)
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#define BOOST_FLOATMAX_C(x) BOOST_FLOAT64_C(x)
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#define BOOST_FLOATMAX_MIN BOOST_FLOAT_64_MIN
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#define BOOST_FLOATMAX_MAX BOOST_FLOAT_64_MAX
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#undef BOOST_CSTDFLOAT_FLOAT80_NATIVE_TYPE
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#undef BOOST_CSTDFLOAT_FLOAT128_NATIVE_TYPE
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#undef BOOST_FLOAT80_C
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#undef BOOST_FLOAT128_C
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#elif(BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 80)
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#define BOOST_FLOATMAX_C(x) BOOST_FLOAT80_C(x)
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#define BOOST_FLOATMAX_MIN BOOST_FLOAT_80_MIN
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#define BOOST_FLOATMAX_MAX BOOST_FLOAT_80_MAX
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#undef BOOST_CSTDFLOAT_FLOAT128_NATIVE_TYPE
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#undef BOOST_FLOAT128_C
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#elif(BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 128)
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#define BOOST_FLOATMAX_C(x) BOOST_FLOAT128_C(x)
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#define BOOST_FLOATMAX_MIN BOOST_FLOAT_128_MIN
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@@ -278,6 +340,28 @@
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namespace boost
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{
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#if(BOOST_CSTDFLOAT_HAS_FLOAT16_NATIVE_TYPE == 1)
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typedef BOOST_CSTDFLOAT_FLOAT16_NATIVE_TYPE float16_t;
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typedef float16_t float_fast16_t;
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typedef float16_t float_least16_t;
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BOOST_STATIC_ASSERT(std::numeric_limits<float16_t>::is_iec559 == true);
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BOOST_STATIC_ASSERT(std::numeric_limits<float16_t>::radix == 2);
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BOOST_STATIC_ASSERT(std::numeric_limits<float16_t>::digits == 11);
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BOOST_STATIC_ASSERT(std::numeric_limits<float16_t>::max_exponent == 16);
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#endif
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#if(BOOST_CSTDFLOAT_HAS_FLOAT24_NATIVE_TYPE == 1)
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typedef BOOST_CSTDFLOAT_FLOAT24_NATIVE_TYPE float24_t;
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typedef float24_t float_fast24_t;
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typedef float24_t float_least24_t;
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BOOST_STATIC_ASSERT(std::numeric_limits<float24_t>::is_iec559 == true);
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BOOST_STATIC_ASSERT(std::numeric_limits<float24_t>::radix == 2);
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BOOST_STATIC_ASSERT(std::numeric_limits<float24_t>::digits == 16);
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BOOST_STATIC_ASSERT(std::numeric_limits<float24_t>::max_exponent == 64);
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#endif
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#if(BOOST_CSTDFLOAT_HAS_FLOAT32_NATIVE_TYPE == 1)
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typedef BOOST_CSTDFLOAT_FLOAT32_NATIVE_TYPE float32_t;
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typedef float32_t float_fast32_t;
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@@ -322,7 +406,11 @@
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BOOST_STATIC_ASSERT(std::numeric_limits<float128_t>::max_exponent == 16384);
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#endif
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#if (BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 32)
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#if (BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 16)
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typedef float16_t floatmax_t;
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#elif(BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 24)
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typedef float24_t floatmax_t;
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#elif(BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 32)
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typedef float32_t floatmax_t;
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#elif(BOOST_CSTDFLOAT_MAXIMUM_AVAILABLE_WIDTH == 64)
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typedef float64_t floatmax_t;
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