Remove "Contributed by" lines

We stopped adding "Contributed by" or similar lines in sources in 2012
in favour of git logs and keeping the Contributors section of the
glibc manual up to date.  Removing these lines makes the license
header a bit more consistent across files and also removes the
possibility of error in attribution when license blocks or files are
copied across since the contributed-by lines don't actually reflect
reality in those cases.

Move all "Contributed by" and similar lines (Written by, Test by,
etc.) into a new file CONTRIBUTED-BY to retain record of these
contributions.  These contributors are also mentioned in
manual/contrib.texi, so we just maintain this additional record as a
courtesy to the earlier developers.

The following scripts were used to filter a list of files to edit in
place and to clean up the CONTRIBUTED-BY file respectively.  These
were not added to the glibc sources because they're not expected to be
of any use in future given that this is a one time task:

https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc
https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

51 files changed, 0 insertions, 54 deletions

diff --git a/sysdeps/ieee754/flt-32/e_acosf.c b/sysdeps/ieee754/flt-32/e_acosf.c
index ce688c9802..e3b3bbc928 100644
--- a/sysdeps/ieee754/flt-32/e_acosf.c
+++ b/sysdeps/ieee754/flt-32/e_acosf.c
@@ -1,5 +1,4 @@
 /* e_acosf.c -- float version of e_acos.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_acoshf.c b/sysdeps/ieee754/flt-32/e_acoshf.c
index 5f573c3e98..2237af4ba4 100644
--- a/sysdeps/ieee754/flt-32/e_acoshf.c
+++ b/sysdeps/ieee754/flt-32/e_acoshf.c
@@ -1,5 +1,4 @@
 /* e_acoshf.c -- float version of e_acosh.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_asinf.c b/sysdeps/ieee754/flt-32/e_asinf.c
index 720e95d64d..d9f446d1b1 100644
--- a/sysdeps/ieee754/flt-32/e_asinf.c
+++ b/sysdeps/ieee754/flt-32/e_asinf.c
@@ -1,5 +1,4 @@
 /* e_asinf.c -- float version of e_asin.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_atan2f.c b/sysdeps/ieee754/flt-32/e_atan2f.c
index 743b6fd43c..75174062e8 100644
--- a/sysdeps/ieee754/flt-32/e_atan2f.c
+++ b/sysdeps/ieee754/flt-32/e_atan2f.c
@@ -1,5 +1,4 @@
 /* e_atan2f.c -- float version of e_atan2.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_atanhf.c b/sysdeps/ieee754/flt-32/e_atanhf.c
index 012e590c24..7d035fb208 100644
--- a/sysdeps/ieee754/flt-32/e_atanhf.c
+++ b/sysdeps/ieee754/flt-32/e_atanhf.c
@@ -1,6 +1,5 @@
 /* Copyright (C) 2011-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/e_coshf.c b/sysdeps/ieee754/flt-32/e_coshf.c
index 742a68139e..052d387e42 100644
--- a/sysdeps/ieee754/flt-32/e_coshf.c
+++ b/sysdeps/ieee754/flt-32/e_coshf.c
@@ -1,6 +1,4 @@
 /* e_coshf.c -- float version of e_cosh.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
- * Optimizations by Ulrich Drepper <drepper@gmail.com>, 2011
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_fmodf.c b/sysdeps/ieee754/flt-32/e_fmodf.c
index e641599221..b71c4f754f 100644
--- a/sysdeps/ieee754/flt-32/e_fmodf.c
+++ b/sysdeps/ieee754/flt-32/e_fmodf.c
@@ -1,5 +1,4 @@
 /* e_fmodf.c -- float version of e_fmod.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_gammaf_r.c b/sysdeps/ieee754/flt-32/e_gammaf_r.c
index 79ed79575c..974ed67c96 100644
--- a/sysdeps/ieee754/flt-32/e_gammaf_r.c
+++ b/sysdeps/ieee754/flt-32/e_gammaf_r.c
@@ -1,7 +1,6 @@
 /* Implementation of gamma function according to ISO C.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/e_hypotf.c b/sysdeps/ieee754/flt-32/e_hypotf.c
index dfffcf4988..e770947dc1 100644
--- a/sysdeps/ieee754/flt-32/e_hypotf.c
+++ b/sysdeps/ieee754/flt-32/e_hypotf.c
@@ -1,5 +1,4 @@
 /* e_hypotf.c -- float version of e_hypot.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_ilogbf.c b/sysdeps/ieee754/flt-32/e_ilogbf.c
index 1ae344ea39..db24012eb4 100644
--- a/sysdeps/ieee754/flt-32/e_ilogbf.c
+++ b/sysdeps/ieee754/flt-32/e_ilogbf.c
@@ -1,5 +1,4 @@
 /* s_ilogbf.c -- float version of s_ilogb.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_j0f.c b/sysdeps/ieee754/flt-32/e_j0f.c
index 462518c365..2c7f062c4a 100644
--- a/sysdeps/ieee754/flt-32/e_j0f.c
+++ b/sysdeps/ieee754/flt-32/e_j0f.c
@@ -1,5 +1,4 @@
 /* e_j0f.c -- float version of e_j0.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_j1f.c b/sysdeps/ieee754/flt-32/e_j1f.c
index f10011e92b..052c661db9 100644
--- a/sysdeps/ieee754/flt-32/e_j1f.c
+++ b/sysdeps/ieee754/flt-32/e_j1f.c
@@ -1,5 +1,4 @@
 /* e_j1f.c -- float version of e_j1.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_jnf.c b/sysdeps/ieee754/flt-32/e_jnf.c
index b2a015a48a..80b684dd97 100644
--- a/sysdeps/ieee754/flt-32/e_jnf.c
+++ b/sysdeps/ieee754/flt-32/e_jnf.c
@@ -1,5 +1,4 @@
 /* e_jnf.c -- float version of e_jn.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_lgammaf_r.c b/sysdeps/ieee754/flt-32/e_lgammaf_r.c
index 0667b1bb3e..a1a3a60454 100644
--- a/sysdeps/ieee754/flt-32/e_lgammaf_r.c
+++ b/sysdeps/ieee754/flt-32/e_lgammaf_r.c
@@ -1,5 +1,4 @@
 /* e_lgammaf_r.c -- float version of e_lgamma_r.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_log10f.c b/sysdeps/ieee754/flt-32/e_log10f.c
index 4e31e5cfdd..791895e042 100644
--- a/sysdeps/ieee754/flt-32/e_log10f.c
+++ b/sysdeps/ieee754/flt-32/e_log10f.c
@@ -1,5 +1,4 @@
 /* e_log10f.c -- float version of e_log10.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_remainderf.c b/sysdeps/ieee754/flt-32/e_remainderf.c
index 946527c3f8..81781363af 100644
--- a/sysdeps/ieee754/flt-32/e_remainderf.c
+++ b/sysdeps/ieee754/flt-32/e_remainderf.c
@@ -1,5 +1,4 @@
 /* e_remainderf.c -- float version of e_remainder.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_sinhf.c b/sysdeps/ieee754/flt-32/e_sinhf.c
index 6fe74f3faf..d3998e8336 100644
--- a/sysdeps/ieee754/flt-32/e_sinhf.c
+++ b/sysdeps/ieee754/flt-32/e_sinhf.c
@@ -1,5 +1,4 @@
 /* e_sinhf.c -- float version of e_sinh.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/e_sqrtf.c b/sysdeps/ieee754/flt-32/e_sqrtf.c
index 177bf5dbdd..1c0245b733 100644
--- a/sysdeps/ieee754/flt-32/e_sqrtf.c
+++ b/sysdeps/ieee754/flt-32/e_sqrtf.c
@@ -1,5 +1,4 @@
 /* e_sqrtf.c -- float version of e_sqrt.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/k_tanf.c b/sysdeps/ieee754/flt-32/k_tanf.c
index 228ece2075..e1c9d14104 100644
--- a/sysdeps/ieee754/flt-32/k_tanf.c
+++ b/sysdeps/ieee754/flt-32/k_tanf.c
@@ -1,5 +1,4 @@
 /* k_tanf.c -- float version of k_tan.c
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_asinhf.c b/sysdeps/ieee754/flt-32/s_asinhf.c
index 13af5db1eb..a94676fbda 100644
--- a/sysdeps/ieee754/flt-32/s_asinhf.c
+++ b/sysdeps/ieee754/flt-32/s_asinhf.c
@@ -1,5 +1,4 @@
 /* s_asinhf.c -- float version of s_asinh.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_atanf.c b/sysdeps/ieee754/flt-32/s_atanf.c
index f61b0f5ef6..3dbf5c5bb7 100644
--- a/sysdeps/ieee754/flt-32/s_atanf.c
+++ b/sysdeps/ieee754/flt-32/s_atanf.c
@@ -1,5 +1,4 @@
 /* s_atanf.c -- float version of s_atan.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_cbrtf.c b/sysdeps/ieee754/flt-32/s_cbrtf.c
index 2f1850ca64..3049fc6a56 100644
--- a/sysdeps/ieee754/flt-32/s_cbrtf.c
+++ b/sysdeps/ieee754/flt-32/s_cbrtf.c
@@ -1,8 +1,6 @@
 /* Compute cubic root of float value.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Dirk Alboth <dirka@uni-paderborn.de> and
-   Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/s_ceilf.c b/sysdeps/ieee754/flt-32/s_ceilf.c
index 5c4abfe145..0263552dee 100644
--- a/sysdeps/ieee754/flt-32/s_ceilf.c
+++ b/sysdeps/ieee754/flt-32/s_ceilf.c
@@ -1,5 +1,4 @@
 /* s_ceilf.c -- float version of s_ceil.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_copysignf.c b/sysdeps/ieee754/flt-32/s_copysignf.c
index 1c097d313f..e9e92dc28f 100644
--- a/sysdeps/ieee754/flt-32/s_copysignf.c
+++ b/sysdeps/ieee754/flt-32/s_copysignf.c
@@ -1,5 +1,4 @@
 /* s_copysignf.c -- float version of s_copysign.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_erff.c b/sysdeps/ieee754/flt-32/s_erff.c
index 693934d59a..ba297342ea 100644
--- a/sysdeps/ieee754/flt-32/s_erff.c
+++ b/sysdeps/ieee754/flt-32/s_erff.c
@@ -1,5 +1,4 @@
 /* s_erff.c -- float version of s_erf.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_expm1f.c b/sysdeps/ieee754/flt-32/s_expm1f.c
index b72cc0d083..35f7b5214a 100644
--- a/sysdeps/ieee754/flt-32/s_expm1f.c
+++ b/sysdeps/ieee754/flt-32/s_expm1f.c
@@ -1,5 +1,4 @@
 /* s_expm1f.c -- float version of s_expm1.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_fabsf.c b/sysdeps/ieee754/flt-32/s_fabsf.c
index d3f6eb830b..c08a64db39 100644
--- a/sysdeps/ieee754/flt-32/s_fabsf.c
+++ b/sysdeps/ieee754/flt-32/s_fabsf.c
@@ -1,5 +1,4 @@
 /* s_fabsf.c -- float version of s_fabs.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_finitef.c b/sysdeps/ieee754/flt-32/s_finitef.c
index b9ae048559..5669da428d 100644
--- a/sysdeps/ieee754/flt-32/s_finitef.c
+++ b/sysdeps/ieee754/flt-32/s_finitef.c
@@ -1,5 +1,4 @@
 /* s_finitef.c -- float version of s_finite.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_floorf.c b/sysdeps/ieee754/flt-32/s_floorf.c
index da6c6dfa8a..a5c38818f1 100644
--- a/sysdeps/ieee754/flt-32/s_floorf.c
+++ b/sysdeps/ieee754/flt-32/s_floorf.c
@@ -1,5 +1,4 @@
 /* s_floorf.c -- float version of s_floor.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_fpclassifyf.c b/sysdeps/ieee754/flt-32/s_fpclassifyf.c
index eb45fd8901..5b4c836b20 100644
--- a/sysdeps/ieee754/flt-32/s_fpclassifyf.c
+++ b/sysdeps/ieee754/flt-32/s_fpclassifyf.c
@@ -1,7 +1,6 @@
 /* Return classification value corresponding to argument.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/s_frexpf.c b/sysdeps/ieee754/flt-32/s_frexpf.c
index b7403bf0d8..59fef66a6b 100644
--- a/sysdeps/ieee754/flt-32/s_frexpf.c
+++ b/sysdeps/ieee754/flt-32/s_frexpf.c
@@ -1,5 +1,4 @@
 /* s_frexpf.c -- float version of s_frexp.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_isinff.c b/sysdeps/ieee754/flt-32/s_isinff.c
index 6eec050bb5..a5a08ae51b 100644
--- a/sysdeps/ieee754/flt-32/s_isinff.c
+++ b/sysdeps/ieee754/flt-32/s_isinff.c
@@ -1,5 +1,4 @@
 /*
- * Written by J.T. Conklin <jtc@netbsd.org>.
  * Public domain.
  */
 
diff --git a/sysdeps/ieee754/flt-32/s_isnanf.c b/sysdeps/ieee754/flt-32/s_isnanf.c
index 52129735fe..7911c0eaaf 100644
--- a/sysdeps/ieee754/flt-32/s_isnanf.c
+++ b/sysdeps/ieee754/flt-32/s_isnanf.c
@@ -1,5 +1,4 @@
 /* s_isnanf.c -- float version of s_isnan.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_llrintf.c b/sysdeps/ieee754/flt-32/s_llrintf.c
index eecca54f06..f3f300cd25 100644
--- a/sysdeps/ieee754/flt-32/s_llrintf.c
+++ b/sysdeps/ieee754/flt-32/s_llrintf.c
@@ -2,7 +2,6 @@
    direction.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/s_llroundf.c b/sysdeps/ieee754/flt-32/s_llroundf.c
index 68a851a1ab..372c5ba002 100644
--- a/sysdeps/ieee754/flt-32/s_llroundf.c
+++ b/sysdeps/ieee754/flt-32/s_llroundf.c
@@ -1,7 +1,6 @@
 /* Round float value to long long int.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/s_log1pf.c b/sysdeps/ieee754/flt-32/s_log1pf.c
index a06190a589..6630f5a78e 100644
--- a/sysdeps/ieee754/flt-32/s_log1pf.c
+++ b/sysdeps/ieee754/flt-32/s_log1pf.c
@@ -1,5 +1,4 @@
 /* s_log1pf.c -- float version of s_log1p.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_logbf.c b/sysdeps/ieee754/flt-32/s_logbf.c
index e0d4f3fbab..a06f975797 100644
--- a/sysdeps/ieee754/flt-32/s_logbf.c
+++ b/sysdeps/ieee754/flt-32/s_logbf.c
@@ -1,5 +1,4 @@
 /* s_logbf.c -- float version of s_logb.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_lrintf.c b/sysdeps/ieee754/flt-32/s_lrintf.c
index 645c0cd253..f29ee26aae 100644
--- a/sysdeps/ieee754/flt-32/s_lrintf.c
+++ b/sysdeps/ieee754/flt-32/s_lrintf.c
@@ -2,7 +2,6 @@
    direction.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/s_lroundf.c b/sysdeps/ieee754/flt-32/s_lroundf.c
index 5d6955aec0..b64feb2223 100644
--- a/sysdeps/ieee754/flt-32/s_lroundf.c
+++ b/sysdeps/ieee754/flt-32/s_lroundf.c
@@ -1,7 +1,6 @@
 /* Round float value to long int.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/s_modff.c b/sysdeps/ieee754/flt-32/s_modff.c
index 45a94594fe..ad2e91de25 100644
--- a/sysdeps/ieee754/flt-32/s_modff.c
+++ b/sysdeps/ieee754/flt-32/s_modff.c
@@ -1,5 +1,4 @@
 /* s_modff.c -- float version of s_modf.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_nearbyintf.c b/sysdeps/ieee754/flt-32/s_nearbyintf.c
index 2a79907168..b270749f4c 100644
--- a/sysdeps/ieee754/flt-32/s_nearbyintf.c
+++ b/sysdeps/ieee754/flt-32/s_nearbyintf.c
@@ -1,7 +1,5 @@
 /* s_rintf.c -- float version of s_rint.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
-/* Adapted for use as nearbyint by Ulrich Drepper <drepper@cygnus.com>.  */
 
 /*
  * ====================================================
diff --git a/sysdeps/ieee754/flt-32/s_nextafterf.c b/sysdeps/ieee754/flt-32/s_nextafterf.c
index aa49df5a9e..4912988266 100644
--- a/sysdeps/ieee754/flt-32/s_nextafterf.c
+++ b/sysdeps/ieee754/flt-32/s_nextafterf.c
@@ -1,5 +1,4 @@
 /* s_nextafterf.c -- float version of s_nextafter.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_remquof.c b/sysdeps/ieee754/flt-32/s_remquof.c
index 8188f6ac99..d43f5e9841 100644
--- a/sysdeps/ieee754/flt-32/s_remquof.c
+++ b/sysdeps/ieee754/flt-32/s_remquof.c
@@ -1,7 +1,6 @@
 /* Compute remainder and a congruent to the quotient.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/s_rintf.c b/sysdeps/ieee754/flt-32/s_rintf.c
index 627bada566..fe5258ae61 100644
--- a/sysdeps/ieee754/flt-32/s_rintf.c
+++ b/sysdeps/ieee754/flt-32/s_rintf.c
@@ -1,5 +1,4 @@
 /* s_rintf.c -- float version of s_rint.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_roundf.c b/sysdeps/ieee754/flt-32/s_roundf.c
index 1b16bfbd6d..14e02ee3ac 100644
--- a/sysdeps/ieee754/flt-32/s_roundf.c
+++ b/sysdeps/ieee754/flt-32/s_roundf.c
@@ -1,7 +1,6 @@
 /* Round float to integer away from zero.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/s_scalblnf.c b/sysdeps/ieee754/flt-32/s_scalblnf.c
index ad3c586b33..8c9d8c2a82 100644
--- a/sysdeps/ieee754/flt-32/s_scalblnf.c
+++ b/sysdeps/ieee754/flt-32/s_scalblnf.c
@@ -1,5 +1,4 @@
 /* s_scalbnf.c -- float version of s_scalbn.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_scalbnf.c b/sysdeps/ieee754/flt-32/s_scalbnf.c
index 1a760f767a..d521d9a303 100644
--- a/sysdeps/ieee754/flt-32/s_scalbnf.c
+++ b/sysdeps/ieee754/flt-32/s_scalbnf.c
@@ -1,5 +1,4 @@
 /* s_scalbnf.c -- float version of s_scalbn.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_signbitf.c b/sysdeps/ieee754/flt-32/s_signbitf.c
index d0a7b02024..1e42111dc0 100644
--- a/sysdeps/ieee754/flt-32/s_signbitf.c
+++ b/sysdeps/ieee754/flt-32/s_signbitf.c
@@ -1,7 +1,6 @@
 /* Return nonzero value if number is negative.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/sysdeps/ieee754/flt-32/s_tanf.c b/sysdeps/ieee754/flt-32/s_tanf.c
index fd104103ad..ae6600bd57 100644
--- a/sysdeps/ieee754/flt-32/s_tanf.c
+++ b/sysdeps/ieee754/flt-32/s_tanf.c
@@ -1,5 +1,4 @@
 /* s_tanf.c -- float version of s_tan.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_tanhf.c b/sysdeps/ieee754/flt-32/s_tanhf.c
index cc3d63d35d..2c12f04569 100644
--- a/sysdeps/ieee754/flt-32/s_tanhf.c
+++ b/sysdeps/ieee754/flt-32/s_tanhf.c
@@ -1,5 +1,4 @@
 /* s_tanhf.c -- float version of s_tanh.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  */
 
 /*
diff --git a/sysdeps/ieee754/flt-32/s_truncf.c b/sysdeps/ieee754/flt-32/s_truncf.c
index bd2aa2d2dc..f2c003abd2 100644
--- a/sysdeps/ieee754/flt-32/s_truncf.c
+++ b/sysdeps/ieee754/flt-32/s_truncf.c
@@ -1,7 +1,6 @@
 /* Truncate argument to nearest integral value not larger than the argument.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public