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glibc/sysdeps/i386/fpu
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Adhemerval Zanella 7c00a20397 math: Remove i386 ilogb/ilogbf/llogb/llogbf 
The new float and double implementation does not required an
extra function call and error handling uses math_err function,
which results in better performance on i386 as well.

With gcc-14 on AMD AMD Ryzen 9 5900X, master shows:

$ ./benchtests/bench-ilogb
  "ilogb": {
   "subnormal": {
    "duration": 3.68863e+09,
    "iterations": 1.72228e+08,
    "max": 89.2995,
    "min": 21.016,
    "mean": 21.4171
   },
   "normal": {
    "duration": 3.68878e+09,
    "iterations": 1.72948e+08,
    "max": 78.6065,
    "min": 21.127,
    "mean": 21.3288
   }
  }
$ ./benchtests/bench-ilogbf
  "ilogbf": {
   "subnormal": {
    "duration": 3.68835e+09,
    "iterations": 1.66716e+08,
    "max": 46.953,
    "min": 21.793,
    "mean": 22.1236
   },
   "normal": {
    "duration": 3.68784e+09,
    "iterations": 1.66168e+08,
    "max": 46.9715,
    "min": 21.904,
    "mean": 22.1935
   }
  }

While with this patch:

$ ./benchtests/bench-ilogb
  "ilogb": {
   "subnormal": {
    "duration": 3.68134e+09,
    "iterations": 4.17516e+08,
    "max": 32.5045,
    "min": 8.3245,
    "mean": 8.81723
   },
   "normal": {
    "duration": 3.6677e+09,
    "iterations": 6.79468e+08,
    "max": 50.9305,
    "min": 5.3465,
    "mean": 5.3979
   }
}
$ ./benchtests/bench-ilogbf
  "ilogbf": {
   "subnormal": {
    "duration": 3.67553e+09,
    "iterations": 5.11032e+08,
    "max": 35.927,
    "min": 7.0485,
    "mean": 7.19237
   },
   "normal": {
    "duration": 3.66877e+09,
    "iterations": 6.556e+08,
    "max": 26.3625,
    "min": 5.5315,
    "mean": 5.59605
   }
 }

Checked on i686-linux-gnu.

Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>
2025-06-02 13:32:19 -03:00
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doasin.c
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e_acos.S
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e_exp10.S
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e_exp_data.c
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e_exp.S
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e_expl.S
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e_hypot.c
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e_ilogbl.S
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e_log2_data.c
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e_log2.S
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e_log_data.c
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e_pow_log_data.c
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e_pow.S
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fclrexcpt.c
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fedisblxcpt.c
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fegetenv.c
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fegetexcept.c
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fegetround.c
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feholdexcpt.c
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fesetenv.c
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fesetexcept.c
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fesetmode.c
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fgetexcptflg.c
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fraiseexcpt.c
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fsetexcptflg.c
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ftestexcept.c
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i386-math-asm.h
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Implies
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libm-test-ulps
math: Refactor how to use libm-test-ulps
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math-tests-snan.h
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math-tests-trap-force.h
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mpatan2.c
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mpatan.c
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mpsqrt.c
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s_ceil.c
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s_fdim.c
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s_floor.c
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s_log1p.S
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s_log1pl.S
x86: Remove .tfloat usage
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s_nexttoward.c
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s_trunc.c
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Versions
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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_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_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_log2.c
Remove the error handling wrapper from log2
2018-11-21 09:57:21 +00:00
w_log.c
Remove the error handling wrapper from log
2018-11-21 09:56:27 +00:00
w_pow.c
Remove the error handling wrapper from pow
2018-11-21 09:58:36 +00:00
w_sqrt_compat.c
Add narrowing square root functions
2021-09-10 20:56:22 +00:00
w_sqrt.c
Add narrowing square root functions
2021-09-10 20:56:22 +00:00