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Refactor some libm type-generic macros.
This patch refactors some type-generic libm macros, in both math.h and math_private.h, to be based on a common __MATH_TG macro rather than all replicating similar logic to choose a function to call based on the type of the argument. This should serve to illustrate what I think float128 support for such macros should look like: common macros such as __MATH_TG may need different definitions depending on whether float128 is supported in glibc, so that the individual macros themselves do not need conditionals on float128 support. Tested for x86_64, x86, mips64 and powerpc. * math/math.h (__MATH_TG): New macro. [__USE_ISOC99] (fpclassify): Define using __MATH_TG. [__USE_ISOC99] (signbit): Likewise. [__USE_ISOC99] (isfinite): Likewise. [__USE_ISOC99] (isnan): Likewise. [__USE_ISOC99] (isinf): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (issignaling): Likewise. [__GLIBC_USE (IEC_60559_BFP_EXT)] (__MATH_EVAL_FMT2): New macro. [__GLIBC_USE (IEC_60559_BFP_EXT)] (iseqsig): Define using __MATH_TG and __MATH_EVAL_FMT2. * sysdeps/generic/math_private.h (fabs_tg): Define using __MATH_TG. * sysdeps/ieee754/ldbl-128ibm/bits/iscanonical.h [!__NO_LONG_DOUBLE_MATH] (__iscanonicalf): New macro. [!__NO_LONG_DOUBLE_MATH] (__iscanonical): Likewise. [!__NO_LONG_DOUBLE_MATH] (iscanonical): Define using __MATH_TG. * sysdeps/ieee754/ldbl-96/bits/iscanonical.h (__iscanonicalf): New macro. (__iscanonical): Likewise. (iscanonical): Define using __MATH_TG.
This commit is contained in:
Joseph Myers
125
math/math.h
125
math/math.h
@ -199,6 +199,27 @@ extern int signgam;
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#endif
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/* Depending on the type of TG_ARG, call an appropriately suffixed
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version of FUNC with arguments (including parentheses) ARGS.
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Suffixed functions may not exist for long double if it has the same
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format as double, or for other types with the same format as float,
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double or long double. The behavior is undefined if the argument
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does not have a real floating type. The definition may use a
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conditional expression, so all suffixed versions of FUNC must
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return the same type (FUNC may include a cast if necessary rather
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than being a single identifier). */
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#ifdef __NO_LONG_DOUBLE_MATH
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# define __MATH_TG(TG_ARG, FUNC, ARGS) \
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(sizeof (TG_ARG) == sizeof (float) ? FUNC ## f ARGS : FUNC ARGS)
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#else
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# define __MATH_TG(TG_ARG, FUNC, ARGS) \
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(sizeof (TG_ARG) == sizeof (float) \
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? FUNC ## f ARGS \
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: sizeof (TG_ARG) == sizeof (double) \
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? FUNC ARGS \
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: FUNC ## l ARGS)
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#endif
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/* ISO C99 defines some generic macros which work on any data type. */
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#ifdef __USE_ISOC99
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@ -231,49 +252,22 @@ enum
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&& !defined __OPTIMIZE_SIZE__
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# define fpclassify(x) __builtin_fpclassify (FP_NAN, FP_INFINITE, \
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FP_NORMAL, FP_SUBNORMAL, FP_ZERO, x)
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# elif defined __NO_LONG_DOUBLE_MATH
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# define fpclassify(x) \
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(sizeof (x) == sizeof (float) ? __fpclassifyf (x) : __fpclassify (x))
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# else
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# define fpclassify(x) \
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(sizeof (x) == sizeof (float) \
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? __fpclassifyf (x) \
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: sizeof (x) == sizeof (double) \
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? __fpclassify (x) : __fpclassifyl (x))
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# define fpclassify(x) __MATH_TG ((x), __fpclassify, (x))
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# endif
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/* Return nonzero value if sign of X is negative. */
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# if __GNUC_PREREQ (4,0)
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# define signbit(x) \
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(sizeof (x) == sizeof (float) \
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? __builtin_signbitf (x) \
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: sizeof (x) == sizeof (double) \
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? __builtin_signbit (x) : __builtin_signbitl (x))
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# define signbit(x) __MATH_TG ((x), __builtin_signbit, (x))
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# else
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# ifdef __NO_LONG_DOUBLE_MATH
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# define signbit(x) \
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(sizeof (x) == sizeof (float) ? __signbitf (x) : __signbit (x))
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# else
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# define signbit(x) \
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(sizeof (x) == sizeof (float) \
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? __signbitf (x) \
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: sizeof (x) == sizeof (double) \
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? __signbit (x) : __signbitl (x))
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# endif
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# define signbit(x) __MATH_TG ((x), __signbit, (x))
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# endif
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/* Return nonzero value if X is not +-Inf or NaN. */
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# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__
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# define isfinite(x) __builtin_isfinite (x)
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# elif defined __NO_LONG_DOUBLE_MATH
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# define isfinite(x) \
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(sizeof (x) == sizeof (float) ? __finitef (x) : __finite (x))
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# else
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# define isfinite(x) \
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(sizeof (x) == sizeof (float) \
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? __finitef (x) \
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: sizeof (x) == sizeof (double) \
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? __finite (x) : __finitel (x))
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# define isfinite(x) __MATH_TG ((x), __finite, (x))
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# endif
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/* Return nonzero value if X is neither zero, subnormal, Inf, nor NaN. */
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@ -287,29 +281,15 @@ enum
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we already have this functions `__isnan' and it is faster. */
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# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__
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# define isnan(x) __builtin_isnan (x)
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# elif defined __NO_LONG_DOUBLE_MATH
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# define isnan(x) \
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(sizeof (x) == sizeof (float) ? __isnanf (x) : __isnan (x))
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# else
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# define isnan(x) \
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(sizeof (x) == sizeof (float) \
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? __isnanf (x) \
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: sizeof (x) == sizeof (double) \
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? __isnan (x) : __isnanl (x))
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# define isnan(x) __MATH_TG ((x), __isnan, (x))
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# endif
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/* Return nonzero value if X is positive or negative infinity. */
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# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__
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# define isinf(x) __builtin_isinf_sign (x)
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# elif defined __NO_LONG_DOUBLE_MATH
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# define isinf(x) \
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(sizeof (x) == sizeof (float) ? __isinff (x) : __isinf (x))
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# else
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# define isinf(x) \
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(sizeof (x) == sizeof (float) \
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? __isinff (x) \
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: sizeof (x) == sizeof (double) \
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? __isinf (x) : __isinfl (x))
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# define isinf(x) __MATH_TG ((x), __isinf, (x))
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# endif
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/* Bitmasks for the math_errhandling macro. */
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@ -329,16 +309,7 @@ enum
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# include <bits/iscanonical.h>
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/* Return nonzero value if X is a signaling NaN. */
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# ifdef __NO_LONG_DOUBLE_MATH
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# define issignaling(x) \
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(sizeof (x) == sizeof (float) ? __issignalingf (x) : __issignaling (x))
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# else
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# define issignaling(x) \
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(sizeof (x) == sizeof (float) \
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? __issignalingf (x) \
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: sizeof (x) == sizeof (double) \
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? __issignaling (x) : __issignalingl (x))
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# endif
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# define issignaling(x) __MATH_TG ((x), __issignaling, (x))
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/* Return nonzero value if X is subnormal. */
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# define issubnormal(x) (fpclassify (x) == FP_SUBNORMAL)
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@ -555,36 +526,20 @@ extern int matherr (struct exception *__exc);
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#endif
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#if __GLIBC_USE (IEC_60559_BFP_EXT)
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/* An expression whose type has the widest of the evaluation formats
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of X and Y (which are of floating-point types). */
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# if __FLT_EVAL_METHOD__ == 2 || __FLT_EVAL_METHOD__ > 64
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# define __MATH_EVAL_FMT2(x, y) ((x) + (y) + 0.0L)
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# elif __FLT_EVAL_METHOD__ == 1 || __FLT_EVAL_METHOD__ > 32
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# define __MATH_EVAL_FMT2(x, y) ((x) + (y) + 0.0)
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# else
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# define __MATH_EVAL_FMT2(x, y) ((x) + (y))
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# endif
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/* Return X == Y but raising "invalid" and setting errno if X or Y is
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a NaN. */
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# ifdef __NO_LONG_DOUBLE_MATH
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# if (__FLT_EVAL_METHOD__ == 1 \
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|| __FLT_EVAL_METHOD__ == 2 \
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|| __FLT_EVAL_METHOD__ > 32)
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# define iseqsig(x, y) __iseqsig ((x), (y))
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# else
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# define iseqsig(x, y) \
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(sizeof ((x) + (y)) == sizeof (float) \
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? __iseqsigf ((x), (y)) \
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: __iseqsig ((x), (y)))
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# endif
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# else
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# if __FLT_EVAL_METHOD__ == 2 || __FLT_EVAL_METHOD__ > 64
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# define iseqsig(x, y) __iseqsigl ((x), (y))
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# elif __FLT_EVAL_METHOD__ == 1 || __FLT_EVAL_METHOD__ > 32
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# define iseqsig(x, y) \
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(sizeof ((x) + (y)) <= sizeof (double) \
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? __iseqsig ((x), (y)) \
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: __iseqsigl ((x), (y)))
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# else
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# define iseqsig(x, y) \
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(sizeof ((x) + (y)) == sizeof (float) \
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? __iseqsigf ((x), (y)) \
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: sizeof ((x) + (y)) == sizeof (double) \
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? __iseqsig ((x), (y)) \
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: __iseqsigl ((x), (y)))
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# endif
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# endif
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# define iseqsig(x, y) \
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__MATH_TG (__MATH_EVAL_FMT2 (x, y), __iseqsig, ((x), (y)))
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#endif
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__END_DECLS
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