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glibc/sysdeps/m68k/m680x0/fpu
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Adhemerval Zanella c4be334400 math: Optimize double ilogb/llogb 
It removes the wrapper by moving the error/EDOM handling to an
out-of-line implementation (__math_invalid_i/__math_invalid_li).
Also, __glibc_unlikely is used on errors case since it helps
code generation on recent gcc.

The code now builds to with gcc-14 on aarch64:

0000000000000000 <__ilogb>:
   0:   9e660000        fmov    x0, d0
   4:   d374f801        ubfx    x1, x0, #52, #11
   8:   340000e1        cbz     w1, 24 <__ilogb+0x24>
   c:   510ffc20        sub     w0, w1, #0x3ff
  10:   711ffc3f        cmp     w1, #0x7ff
  14:   54000040        b.eq    1c <__ilogb+0x1c>  // b.none
  18:   d65f03c0        ret
  1c:   12b00000        mov     w0, #0x7fffffff                 // #2147483647
  20:   14000000        b       0 <__math_invalid_i>
  24:   d374cc00        lsl     x0, x0, #12
  28:   b40000a0        cbz     x0, 3c <__ilogb+0x3c>
  2c:   dac01000        clz     x0, x0
  30:   12807fc1        mov     w1, #0xfffffc01                 // #-1023
  34:   4b000020        sub     w0, w1, w0
  38:   d65f03c0        ret
  3c:   320107e0        mov     w0, #0x80000001                 // #-2147483647
  40:   14000000        b       0 <__math_invalid_i>

Some ABI requires additional adjustments:

  * i386 and m68k requires to use the template version, since
    both provide __ieee754_ilogb implementatations.

  * loongarch uses a custom implementation as well.

  * powerpc64le also has a custom implementation for POWER9, which
    is also used for float and float128 version.  The generic
    e_ilogb.c implementation is moved on powerpc to keep the
    current code as-is.

Checked on aarch64-linux-gnu and x86_64-linux-gnu.

Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>
2025-06-02 13:32:19 -03:00
..
branred.c
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doasin.c
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dosincos.c
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e_acos.c
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2025-01-01 11:22:09 -08:00
e_acosf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_acosl.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_asin.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_asinf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_asinl.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_atan2.c
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2025-01-01 11:22:09 -08:00
e_atan2f.c
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e_atan2l.c
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e_atanh.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_atanhf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_atanhl.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_cosh.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_coshf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_coshl.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_exp2.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_exp2f_data.c
Optimized generic expf and exp2f with wrappers
2017-09-25 10:44:39 +01:00
e_exp2f.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_exp2l.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_exp10.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_exp10f.c
New exp10f version without SVID compat wrapper
2020-06-19 12:08:47 -03:00
e_exp10l.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_exp_data.c
Add new exp and exp2 implementations
2018-09-05 16:22:00 +01:00
e_exp.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_expf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_expl.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_fmod.c
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2025-01-01 11:22:09 -08:00
e_fmodf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_fmodl.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_ilogb.c
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2025-01-01 11:22:09 -08:00
e_ilogbf.c
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e_ilogbl.c
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e_log2_data.c
Add new log2 implementation
2018-09-12 17:36:33 +01:00
e_log2.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_log2f_data.c
New generic log2f
2017-09-29 17:17:41 +01:00
e_log2f.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_log2l.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_log10.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_log10f.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_log10l.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_log_data.c
Add new log implementation
2018-09-12 17:33:30 +01:00
e_log.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_logf_data.c
New generic logf
2017-09-29 11:46:46 +01:00
e_logf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_logl.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_pow_log_data.c
Add new pow implementation
2018-09-19 10:04:51 +01:00
e_pow.c
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e_powf_log2_data.c
New generic powf
2017-09-29 17:30:53 +01:00
e_powf.c
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e_powl.c
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e_rem_pio2l.c
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e_remainder.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_remainderf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_remainderl.c
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2020-01-03 10:02:04 -03:00
e_scalb.c
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2025-01-01 11:22:09 -08:00
e_scalbf.c
Add a generic scalb implementation
2020-02-14 08:24:56 -06:00
e_scalbl.c
Add a generic scalb implementation
2020-02-14 08:24:56 -06:00
e_sinh.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_sinhf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_sinhl.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_sqrt.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_sqrtf.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
e_sqrtl.c
Add libm_alias_finite for _finite symbols
2020-01-03 10:02:04 -03:00
fraiseexcpt.c
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2025-01-01 11:22:09 -08:00
k_cosl.c
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k_rem_pio2.c
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k_sinl.c
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k_tanf.c
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k_tanl.c
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math-barriers.h
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2025-01-01 11:22:09 -08:00
mathimpl.h
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mpa.c
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mpatan2.c
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mpatan.c
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mpsqrt.c
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mptan.c
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s_atan_template.c
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s_atan.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_atanf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_atanl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_ccosh_template.c
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s_ceil_template.c
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s_ceil.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_ceilf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_ceill.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_cexp_template.c
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s_cos_template.c
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s_cos.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_cosf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_cosl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_csin_template.c
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s_csinh_template.c
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s_expm1_template.c
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s_expm1.c
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s_expm1f.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_expm1l.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_fabs_template.c
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s_fabs.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_fabsf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_fabsl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_finite.c
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s_finitef.c
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s_finitel.c
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s_floor_template.c
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s_floor.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_floorf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_floorl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_fpclassifyl.c
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s_frexp_template.c
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s_frexp.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_frexpf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_frexpl.c
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s_isinf.c
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2025-01-01 11:22:09 -08:00
s_isinff.c
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s_isinfl.c
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s_isnan.c
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s_isnanf.c
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s_isnanl.c
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s_llrint.c
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s_llrintf.c
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s_llrintl.c
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s_log1p.c
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s_log1pf.c
m68k: Reorganize log1p and significand implementations
2018-06-22 21:34:28 -03:00
s_log1pl.c
m68k: Reorganize log1p and significand implementations
2018-06-22 21:34:28 -03:00
s_logbl.c
Remove "Contributed by" lines
2021-09-03 22:06:44 +05:30
s_lrint_template.c
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s_lrint.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_lrintf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_lrintl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_modf_template.c
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s_modf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_modff.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_modfl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_nearbyint_template.c
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s_nearbyint.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_nearbyintf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_nearbyintl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_nextafterl.c
Remove "Contributed by" lines
2021-09-03 22:06:44 +05:30
s_remquo_template.c
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s_remquo.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_remquof.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_remquol.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_rint_template.c
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s_rint.c
Use rint functions not __rint functions in glibc libm.
2018-09-14 13:10:39 +00:00
s_rintf.c
Use rint functions not __rint functions in glibc libm.
2018-09-14 13:10:39 +00:00
s_rintl.c
Use rint functions not __rint functions in glibc libm.
2018-09-14 13:10:39 +00:00
s_scalbln.c
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s_scalblnf.c
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s_scalblnl.c
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s_scalbn.c
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s_scalbnf.c
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s_scalbnl.c
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s_significand.c
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s_significandf.c
m68k: Reorganize log1p and significand implementations
2018-06-22 21:34:28 -03:00
s_significandl.c
m68k: Reorganize log1p and significand implementations
2018-06-22 21:34:28 -03:00
s_sin_template.c
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s_sin.c
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2017-11-30 22:39:07 +00:00
s_sincos_template.c
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s_sincos.c
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2017-11-30 22:39:07 +00:00
s_sincosf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_sincosl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_sinf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_sinl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_tan_template.c
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s_tan.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_tanf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_tanh_template.c
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s_tanh.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_tanhf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_tanhl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_tanl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_trunc_template.c
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s_trunc.c
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2017-11-30 22:39:07 +00:00
s_truncf.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
s_truncl.c
Rework m68k libm functions to use declare_mgen_alias.
2017-11-30 22:39:07 +00:00
sincos32.c
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sincostab.c
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w_exp2.c
Remove the error handling wrapper from exp and exp2
2018-11-21 09:55:02 +00:00
w_exp2f.c
Do not wrap expf and exp2f
2017-10-02 14:38:54 +01:00
w_exp10_compat.c
math: Fix i386 and m68k exp10 on static build (BZ 31775)
2024-05-21 13:44:22 -03:00
w_exp.c
Remove the error handling wrapper from exp and exp2
2018-11-21 09:55:02 +00:00
w_expf.c
Do not wrap expf and exp2f
2017-10-02 14:38:54 +01:00
w_fmod_compat.c
math: Fix i386 and m68k fmod/fmodf on static build (BZ 31488)
2024-05-21 13:43:39 -03:00
w_fmodf_compat.c
math: Fix i386 and m68k fmod/fmodf on static build (BZ 31488)
2024-05-21 13:43:39 -03:00
w_log1pf.c
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2025-01-01 11:22:09 -08:00
w_log2.c
Remove the error handling wrapper from log2
2018-11-21 09:57:21 +00:00
w_log2f.c
Do not wrap logf, log2f and powf
2017-10-02 14:39:38 +01:00
w_log.c
Remove the error handling wrapper from log
2018-11-21 09:56:27 +00:00
w_logf.c
Do not wrap logf, log2f and powf
2017-10-02 14:39:38 +01:00
w_pow.c
Remove the error handling wrapper from pow
2018-11-21 09:58:36 +00:00
w_powf.c
Do not wrap logf, log2f and powf
2017-10-02 14:39:38 +01:00