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Convert e_exp2l.c into a template
This patch converts the implementation of exp2l in math/e_exp2l.c into a template in math/e_exp2_template.c, then adjusts Makefile to use this template for long double (the implementations for float and double in sysdeps have higher precedence and are not used). This template can also be used for float128, thus reducing the amount of duplicated code that gets added when adding support the new type. Tested for powerpc64le and s390x. * math/Makefile (libm-calls): Move e_exp2F to gen-libm-calls. (gen-libm-calls): Add e_exp2F to use the template. * math/e_exp2l.c: Rename to math/e_exp2_template.c. * math/e_exp2_template.c: New file, renamed from math/e_exp2l.c, and made into a template. * sysdeps/generic/math-type-macros.h (M_MIN_EXP): New macro.
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@ -1,3 +1,12 @@
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2017-05-17 Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com>
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* math/Makefile (libm-calls): Move e_exp2F to gen-libm-calls.
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(gen-libm-calls): Add e_exp2F to use the template.
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* math/e_exp2l.c: Rename to math/e_exp2_template.c.
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* math/e_exp2_template.c: New file, renamed from
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math/e_exp2l.c, and made into a template.
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* sysdeps/generic/math-type-macros.h (M_MIN_EXP): New macro.
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2017-05-17 Siddhesh Poyarekar <siddhesh@sourceware.org>
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2017-05-17 Siddhesh Poyarekar <siddhesh@sourceware.org>
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* elf/dl-tunable-types.h (tunable_type_code_t): New type
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* elf/dl-tunable-types.h (tunable_type_code_t): New type
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@ -59,7 +59,7 @@ gen-libm-calls = cargF conjF cimagF crealF cabsF s_cacosF \
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w_acoshF w_asinF w_atan2F w_atanhF w_coshF w_exp10F \
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w_acoshF w_asinF w_atan2F w_atanhF w_coshF w_exp10F \
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w_exp2F w_fmodF w_hypotF w_j0F w_j1F w_jnF w_logF \
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w_exp2F w_fmodF w_hypotF w_j0F w_j1F w_jnF w_logF \
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w_log10F w_log2F w_powF w_remainderF w_sinhF w_sqrtF \
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w_log10F w_log2F w_powF w_remainderF w_sinhF w_sqrtF \
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w_tgammaF w_lgammaF w_lgammaF_r w_expF
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w_tgammaF w_lgammaF w_lgammaF_r w_expF e_exp2F
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libm-calls = \
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libm-calls = \
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e_acosF e_acoshF e_asinF e_atan2F e_atanhF e_coshF e_expF e_fmodF \
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e_acosF e_acoshF e_asinF e_atan2F e_atanhF e_coshF e_expF e_fmodF \
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@ -72,7 +72,7 @@ libm-calls = \
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s_nextafterF s_nexttowardF s_rintF s_scalblnF \
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s_nextafterF s_nexttowardF s_rintF s_scalblnF \
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s_significandF s_sinF s_tanF s_tanhF \
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s_significandF s_sinF s_tanF s_tanhF \
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s_fpclassifyF s_truncF \
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s_fpclassifyF s_truncF \
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s_remquoF e_log2F e_exp2F s_roundF s_nearbyintF s_sincosF \
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s_remquoF e_log2F s_roundF s_nearbyintF s_sincosF \
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s_fmaF s_lrintF s_llrintF s_lroundF s_llroundF e_exp10F \
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s_fmaF s_lrintF s_llrintF s_lroundF s_llroundF e_exp10F \
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s_issignalingF $(calls:s_%=m_%) x2y2m1F \
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s_issignalingF $(calls:s_%=m_%) x2y2m1F \
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gamma_productF lgamma_negF lgamma_productF \
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gamma_productF lgamma_negF lgamma_productF \
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@ -20,29 +20,28 @@
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#include <math_private.h>
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#include <math_private.h>
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#include <float.h>
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#include <float.h>
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/* To avoid spurious underflows, use this definition to treat IBM long
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#define declare_mgen_finite_alias_x(from, to) \
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double as approximating an IEEE-style format. */
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strong_alias (from, to ## _finite)
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#if LDBL_MANT_DIG == 106
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#define declare_mgen_finite_alias_s(from,to) \
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# undef LDBL_EPSILON
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declare_mgen_finite_alias_x (from, to)
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# define LDBL_EPSILON 0x1p-106L
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#define declare_mgen_finite_alias(from, to) \
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#endif
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declare_mgen_finite_alias_s (M_SUF (from), M_SUF (to))
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long double
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FLOAT
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__ieee754_exp2l (long double x)
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M_DECL_FUNC (__ieee754_exp2) (FLOAT x)
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{
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{
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if (__glibc_likely (isless (x, (long double) LDBL_MAX_EXP)))
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if (__glibc_likely (isless (x, (FLOAT) M_MAX_EXP)))
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{
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{
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if (__builtin_expect (isgreaterequal (x, (long double) (LDBL_MIN_EXP
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if (__builtin_expect (isgreaterequal (x, (FLOAT) (M_MIN_EXP - M_MANT_DIG
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- LDBL_MANT_DIG
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- 1)), 1))
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- 1)), 1))
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{
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{
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int intx = (int) x;
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int intx = (int) x;
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long double fractx = x - intx;
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FLOAT fractx = x - intx;
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long double result;
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FLOAT result;
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if (fabsl (fractx) < LDBL_EPSILON / 4.0L)
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if (M_FABS (fractx) < M_EPSILON / 4)
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result = __scalbnl (1.0L + fractx, intx);
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result = M_SCALBN (1 + fractx, intx);
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else
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else
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result = __scalbnl (__ieee754_expl (M_LN2l * fractx), intx);
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result = M_SCALBN (M_EXP (M_SUF (M_LN2) * fractx), intx);
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math_check_force_underflow_nonneg (result);
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math_check_force_underflow_nonneg (result);
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return result;
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return result;
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}
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}
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@ -52,11 +51,11 @@ __ieee754_exp2l (long double x)
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if (isinf (x))
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if (isinf (x))
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return 0;
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return 0;
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else
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else
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return LDBL_MIN * LDBL_MIN;
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return M_MIN * M_MIN;
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}
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}
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}
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}
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else
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else
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/* Infinity, NaN or overflow. */
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/* Infinity, NaN or overflow. */
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return LDBL_MAX * x;
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return M_MAX * x;
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}
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}
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strong_alias (__ieee754_exp2l, __exp2l_finite)
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declare_mgen_finite_alias (__ieee754_exp2, __exp2)
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@ -78,6 +78,7 @@
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#define __M_CONCATX(a,b) __M_CONCAT(a,b)
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#define __M_CONCATX(a,b) __M_CONCAT(a,b)
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#define M_NAN M_SUF (__builtin_nan) ("")
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#define M_NAN M_SUF (__builtin_nan) ("")
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#define M_MIN_EXP __M_CONCATX (M_PFX, _MIN_EXP)
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#define M_MAX_EXP __M_CONCATX (M_PFX, _MAX_EXP)
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#define M_MAX_EXP __M_CONCATX (M_PFX, _MAX_EXP)
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#define M_MIN __M_CONCATX (M_PFX, _MIN)
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#define M_MIN __M_CONCATX (M_PFX, _MIN)
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#define M_MAX __M_CONCATX (M_PFX, _MAX)
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#define M_MAX __M_CONCATX (M_PFX, _MAX)
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