Add exp10 macro to <tgmath.h> (bug 26108)

glibc has had exp10 functions since long before they were
standardized; now they are standardized in TS 18661-4 and C2X, they
are also specified there to have a corresponding type-generic macro.
Add one to <tgmath.h>, so fixing bug 26108.

glibc doesn't have other functions from TS 18661-4 yet, but when
added, it will be natural to add the type-generic macro for each
function family at the same time as the functions.

Tested for x86_64.
This commit is contained in:
Joseph Myers 2021-09-30 20:40:34 +00:00
parent 1e1ecea62e
commit 52c057e37c
5 changed files with 24 additions and 4 deletions

3
NEWS
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@ -42,6 +42,9 @@ Major new features:
* The __STDC_IEC_60559_BFP__ and __STDC_IEC_60559_COMPLEX__ macros are
predefined as specified in TS 18661-1:2014.
* The exp10 functions in <math.h> now have a corresponding type-generic
macro in <tgmath.h>.
Deprecated and removed features, and other changes affecting compatibility:
* The r_version update in the debugger interface makes the glibc binary

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@ -374,9 +374,9 @@ $(foreach t,$(libm-tests-base),\
tgmath3-narrow-types = f d f16 f32 f64 f128 f32x f64x
tgmath3-narrow-macros = $(foreach t,$(tgmath3-narrow-types), \
$(foreach f,$(libm-narrow-fns),$(t)$(f)))
tgmath3-macros = atan2 cbrt ceil copysign erf erfc exp2 expm1 fdim floor \
fma fmax fmin fmod frexp hypot ilogb ldexp lgamma llrint \
llround log10 log1p log2 logb lrint lround nearbyint \
tgmath3-macros = atan2 cbrt ceil copysign erf erfc exp10 exp2 expm1 fdim \
floor fma fmax fmin fmod frexp hypot ilogb ldexp lgamma \
llrint llround log10 log1p log2 logb lrint lround nearbyint \
nextafter nexttoward remainder remquo rint round scalbn \
scalbln tgamma trunc acos asin atan acosh asinh atanh cos \
sin tan cosh sinh tanh exp log pow sqrt fabs carg cimag conj \

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@ -707,6 +707,8 @@ class Tests(object):
('_Float32x', 'f32x'),
('_Float64x', 'f64x')):
self.add_tests(prefix + fn, ret, ['r'] * args)
# TS 18661-4 functions.
self.add_tests('exp10', 'r', ['r'])
# C2X functions.
self.add_tests('fmaximum', 'r', ['r', 'r'])
self.add_tests('fmaximum_mag', 'r', ['r', 'r'])

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@ -48,7 +48,7 @@ volatile int count_cdouble;
volatile int count_cfloat;
volatile int count_cldouble;
#define NCALLS 156
#define NCALLS 158
#define NCALLS_INT 4
#define NCCALLS 47
@ -253,6 +253,7 @@ F(compile_test) (void)
a = log1p (log1p (x));
b = logb (logb (a));
a = exp2 (exp2 (x));
a = exp10 (exp10 (x));
b = log2 (log2 (a));
a = pow (pow (x, a), pow (c, b));
b = sqrt (sqrt (a));
@ -365,6 +366,7 @@ F(compile_test) (void)
a = log1p (y);
a = logb (y);
a = exp2 (y);
a = exp10 (y);
a = log2 (y);
a = pow (y, y);
a = sqrt (y);
@ -615,6 +617,14 @@ TYPE
return x;
}
TYPE
(F(exp10)) (TYPE x)
{
++count;
P ();
return x;
}
TYPE
(F(exp2)) (TYPE x)
{

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@ -785,6 +785,11 @@
/* Compute base-2 logarithm of X. */
#define log2(Val) __TGMATH_UNARY_REAL_ONLY (Val, log2)
#if __GLIBC_USE (IEC_60559_FUNCS_EXT_C2X)
/* Compute exponent to base ten. */
#define exp10(Val) __TGMATH_UNARY_REAL_ONLY (Val, exp10)
#endif
/* Power functions. */