[23/23] math: Use tanhf from CORE-MATH

Message ID 20241129132032.476978-24-adhemerval.zanella@linaro.org
State Superseded
Delegated to: DJ Delorie
Headers
Series Add remaining CORE-MATH binary32 implementations to libm |

Commit Message

Adhemerval Zanella Netto Nov. 29, 2024, 1:17 p.m. UTC
  The CORE-MATH implementation is correctly rounded (for any rounding mode)
and shows slight better performance to the generic tanhf.

The code was adapted to glibc style and to use the definition of
math_config.h (to handle errno, overflow, and underflow).

Benchtest on x64_64 (Ryzen 9 5900X, gcc 14.2.1), aarch64 (Neoverse-N1,
gcc 13.3.1), and powerpc (POWER10, gcc 13.2.1):

Latency                      master        patched   improvement
x86_64                      51.5273        41.0951        20.25%
x86_64v2                    47.7021        39.1526        17.92%
x86_64v3                    45.0373        34.2737        23.90%
i686                       133.9970        83.8596        37.42%
aarch64 (Neoverse)          21.5439        14.7961        31.32%
power10                     13.3301         8.4406        36.68%

reciprocal-throughput        master        patched   improvement
x86_64                      24.9493        12.8547        48.48%
x86_64v2                    20.7051        12.7761        38.29%
x86_64v3                    19.2492        11.0851        42.41%
i686                        78.6498        29.8211        62.08%
aarch64 (Neoverse)          11.6026        7.11487        38.68%
power10                      6.3328         2.8746        54.61%

Signed-off-by: Alexei Sibidanov <sibid@uvic.ca>
Signed-off-by: Paul Zimmermann <Paul.Zimmermann@inria.fr>
Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
---
 SHARED-FILES                                  |   4 +
 sysdeps/aarch64/libm-test-ulps                |   4 -
 sysdeps/alpha/fpu/libm-test-ulps              |   4 -
 sysdeps/arc/fpu/libm-test-ulps                |   4 -
 sysdeps/arc/nofpu/libm-test-ulps              |   1 -
 sysdeps/arm/libm-test-ulps                    |   4 -
 sysdeps/csky/fpu/libm-test-ulps               |   4 -
 sysdeps/csky/nofpu/libm-test-ulps             |   4 -
 sysdeps/hppa/fpu/libm-test-ulps               |   4 -
 sysdeps/i386/fpu/libm-test-ulps               |   4 -
 .../i386/i686/fpu/multiarch/libm-test-ulps    |   4 -
 sysdeps/ieee754/flt-32/s_tanhf.c              | 131 +++++++++++-------
 sysdeps/loongarch/lp64/libm-test-ulps         |   4 -
 sysdeps/m68k/m680x0/fpu/libm-test-ulps        |   3 -
 sysdeps/microblaze/libm-test-ulps             |   1 -
 sysdeps/mips/mips32/libm-test-ulps            |   4 -
 sysdeps/mips/mips64/libm-test-ulps            |   4 -
 sysdeps/or1k/fpu/libm-test-ulps               |   4 -
 sysdeps/or1k/nofpu/libm-test-ulps             |   4 -
 sysdeps/powerpc/fpu/libm-test-ulps            |   4 -
 sysdeps/powerpc/nofpu/libm-test-ulps          |   4 -
 sysdeps/riscv/nofpu/libm-test-ulps            |   4 -
 sysdeps/riscv/rvd/libm-test-ulps              |   4 -
 sysdeps/s390/fpu/libm-test-ulps               |   4 -
 sysdeps/sh/libm-test-ulps                     |   2 -
 sysdeps/sparc/fpu/libm-test-ulps              |   4 -
 sysdeps/x86_64/fpu/libm-test-ulps             |   4 -
 27 files changed, 82 insertions(+), 144 deletions(-)
  

Patch

diff --git a/SHARED-FILES b/SHARED-FILES
index 3bd4e7fb4a..032c407881 100644
--- a/SHARED-FILES
+++ b/SHARED-FILES
@@ -330,3 +330,7 @@  sysdeps/ieee754/flt-32/e_sinhf.c:
   (src/binary32/sinh/sinhf.c in CORE-MATH)
   - the code was adapted to use glibc code style and internal
     functions to handle errno, overflow, and underflow.
+sysdeps/ieee754/flt-32/s_tanhf.c:
+  (src/binary32/tanh/tanhf.c in CORE-MATH)
+  - the code was adapted to use glibc code style and internal
+    functions to handle errno, overflow, and underflow.
diff --git a/sysdeps/aarch64/libm-test-ulps b/sysdeps/aarch64/libm-test-ulps
index 4545d8236b..ab8f7e830e 100644
--- a/sysdeps/aarch64/libm-test-ulps
+++ b/sysdeps/aarch64/libm-test-ulps
@@ -1549,7 +1549,6 @@  ldouble: 1
 
 Function: "tanh":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "tanh_advsimd":
@@ -1558,7 +1557,6 @@  float: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 ldouble: 4
 
 Function: "tanh_sve":
@@ -1567,12 +1565,10 @@  float: 2
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 ldouble: 3
 
 Function: "tgamma":
diff --git a/sysdeps/alpha/fpu/libm-test-ulps b/sysdeps/alpha/fpu/libm-test-ulps
index d4329e060d..59ae18c412 100644
--- a/sysdeps/alpha/fpu/libm-test-ulps
+++ b/sysdeps/alpha/fpu/libm-test-ulps
@@ -1322,22 +1322,18 @@  ldouble: 1
 
 Function: "tanh":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 ldouble: 3
 
 Function: "tgamma":
diff --git a/sysdeps/arc/fpu/libm-test-ulps b/sysdeps/arc/fpu/libm-test-ulps
index eb8296d736..f11dc58686 100644
--- a/sysdeps/arc/fpu/libm-test-ulps
+++ b/sysdeps/arc/fpu/libm-test-ulps
@@ -1057,19 +1057,15 @@  double: 1
 
 Function: "tanh":
 double: 3
-float: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 
 Function: "tanh_towardzero":
 double: 3
-float: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/arc/nofpu/libm-test-ulps b/sysdeps/arc/nofpu/libm-test-ulps
index 519a174f7a..f549db1801 100644
--- a/sysdeps/arc/nofpu/libm-test-ulps
+++ b/sysdeps/arc/nofpu/libm-test-ulps
@@ -252,7 +252,6 @@  double: 2
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/arm/libm-test-ulps b/sysdeps/arm/libm-test-ulps
index 7be1a7c75b..705b0641f5 100644
--- a/sysdeps/arm/libm-test-ulps
+++ b/sysdeps/arm/libm-test-ulps
@@ -1051,19 +1051,15 @@  double: 1
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 
 Function: "tanh_upward":
 double: 3
-float: 3
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/csky/fpu/libm-test-ulps b/sysdeps/csky/fpu/libm-test-ulps
index ffc0676765..0e0cc63f07 100644
--- a/sysdeps/csky/fpu/libm-test-ulps
+++ b/sysdeps/csky/fpu/libm-test-ulps
@@ -975,19 +975,15 @@  double: 1
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 
 Function: "tanh_upward":
 double: 3
-float: 3
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/csky/nofpu/libm-test-ulps b/sysdeps/csky/nofpu/libm-test-ulps
index a7c85db00d..a9f6566e2c 100644
--- a/sysdeps/csky/nofpu/libm-test-ulps
+++ b/sysdeps/csky/nofpu/libm-test-ulps
@@ -1006,19 +1006,15 @@  double: 1
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 
 Function: "tanh_upward":
 double: 3
-float: 3
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/hppa/fpu/libm-test-ulps b/sysdeps/hppa/fpu/libm-test-ulps
index 0fbb2f81bb..ea344c2f6c 100644
--- a/sysdeps/hppa/fpu/libm-test-ulps
+++ b/sysdeps/hppa/fpu/libm-test-ulps
@@ -1084,19 +1084,15 @@  double: 1
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 
 Function: "tanh_upward":
 double: 3
-float: 3
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index 26101c933e..3f00faf29f 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -1613,25 +1613,21 @@  ldouble: 2
 
 Function: "tanh":
 double: 2
-float: 2
 float128: 2
 ldouble: 3
 
 Function: "tanh_downward":
 double: 3
-float: 3
 float128: 4
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 float128: 3
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 float128: 3
 ldouble: 4
 
diff --git a/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps b/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps
index 92e821d609..af9ac1cf1c 100644
--- a/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps
+++ b/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps
@@ -1618,25 +1618,21 @@  ldouble: 2
 
 Function: "tanh":
 double: 2
-float: 2
 float128: 2
 ldouble: 3
 
 Function: "tanh_downward":
 double: 3
-float: 3
 float128: 4
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 float128: 3
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 float128: 3
 ldouble: 4
 
diff --git a/sysdeps/ieee754/flt-32/s_tanhf.c b/sysdeps/ieee754/flt-32/s_tanhf.c
index 2c12f04569..b7273d9724 100644
--- a/sysdeps/ieee754/flt-32/s_tanhf.c
+++ b/sysdeps/ieee754/flt-32/s_tanhf.c
@@ -1,63 +1,88 @@ 
-/* s_tanhf.c -- float version of s_tanh.c.
- */
+/* Correctly-rounded hyperbolic tangent function for binary32 value.
 
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
+Copyright (c) 2022-2024 Alexei Sibidanov.
 
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: s_tanhf.c,v 1.4 1995/05/10 20:48:24 jtc Exp $";
-#endif
+The original version of this file was copied from the CORE-MATH
+project (file src/binary32/tanh/tanhf.c, revision bc385c2).
 
-#include <float.h>
-#include <math.h>
-#include <math_private.h>
-#include <math-underflow.h>
-#include <libm-alias-float.h>
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
 
-static const float one=1.0, two=2.0, tiny = 1.0e-30;
-
-float __tanhf(float x)
-{
-	float t,z;
-	int32_t jx,ix;
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
-	GET_FLOAT_WORD(jx,x);
-	ix = jx&0x7fffffff;
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
 
-    /* x is INF or NaN */
-	if(ix>=0x7f800000) {
-	    if (jx>=0) return one/x+one;    /* tanh(+-inf)=+-1 */
-	    else       return one/x-one;    /* tanh(NaN) = NaN */
-	}
+#include <math.h>
+#include <stdint.h>
+#include <libm-alias-float.h>
+#include "math_config.h"
 
-    /* |x| < 22 */
-	if (ix < 0x41b00000) {		/* |x|<22 */
-	    if (ix == 0)
-		return x;		/* x == +-0 */
-	    if (ix<0x24000000) 		/* |x|<2**-55 */
-	      {
-		math_check_force_underflow (x);
-		return x*(one+x);    	/* tanh(small) = small */
-	      }
-	    if (ix>=0x3f800000) {	/* |x|>=1  */
-		t = __expm1f(two*fabsf(x));
-		z = one - two/(t+two);
-	    } else {
-	        t = __expm1f(-two*fabsf(x));
-	        z= -t/(t+two);
-	    }
-    /* |x| > 22, return +-1 */
-	} else {
-	    z = one - tiny;		/* raised inexact flag */
+float
+__tanhf (float x)
+{
+  double z = x;
+  uint32_t ux = asuint (x);
+  int e = (ux >> 23) & 0xff;
+  if (__glibc_unlikely (e == 0xff))
+    {
+      if (ux << 9)
+	return x + x; /* nan */
+      static const float ir[] = { 1.0f, -1.0f };
+      return ir[ux >> 31]; /* +-inf */
+    }
+  if (__glibc_unlikely (e < 115))
+    {
+      if (__glibc_unlikely (e < 102))
+	{
+	  if (__glibc_unlikely ((ux << 1) == 0))
+	    return x;
+	  return fmaf (-x, fabsf (x), x);
 	}
-	return (jx>=0)? z: -z;
+      float x2 = x * x;
+      return fmaf (x, -0x1.555556p-2f * x2, x);
+    }
+  if ((ux << 1) > (0x41102cb3u << 1))
+    return copysignf (1.0f, x) - copysignf (0x1p-25f, x);
+  double z2 = z * z, z4 = z2 * z2, z8 = z4 * z4;
+  static const double cn[] =
+    {
+      0x1p+0,                0x1.30877b8b72d33p-3,  0x1.694aa09ae9e5ep-8,
+      0x1.4101377abb729p-14, 0x1.e0392b1db0018p-22, 0x1.2533756e546f7p-30,
+      0x1.d62e5abe6ae8ap-41, 0x1.b06be534182dep-54
+    };
+  static const double cd[] =
+    {
+      0x1p+0,                0x1.ed99131b0ebeap-2,  0x1.0d27ed6c95a69p-5,
+      0x1.7cbdaca0e9fccp-11, 0x1.b4e60b892578ep-18, 0x1.a6f707c5c71abp-26,
+      0x1.35a8b6e2cd94cp-35, 0x1.ca8230677aa01p-47
+    };
+  double n0 = cn[0] + z2 * cn[1];
+  double n2 = cn[2] + z2 * cn[3];
+  double n4 = cn[4] + z2 * cn[5];
+  double n6 = cn[6] + z2 * cn[7];
+  n0 += z4 * n2;
+  n4 += z4 * n6;
+  n0 += z8 * n4;
+  double d0 = cd[0] + z2 * cd[1];
+  double d2 = cd[2] + z2 * cd[3];
+  double d4 = cd[4] + z2 * cd[5];
+  double d6 = cd[6] + z2 * cd[7];
+  d0 += z4 * d2;
+  d4 += z4 * d6;
+  d0 += z8 * d4;
+  double r = z * n0 / d0;
+  return r;
 }
 libm_alias_float (__tanh, tanh)
diff --git a/sysdeps/loongarch/lp64/libm-test-ulps b/sysdeps/loongarch/lp64/libm-test-ulps
index 1a9ef3c217..a5a8850929 100644
--- a/sysdeps/loongarch/lp64/libm-test-ulps
+++ b/sysdeps/loongarch/lp64/libm-test-ulps
@@ -1329,22 +1329,18 @@  ldouble: 1
 
 Function: "tanh":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 ldouble: 3
 
 Function: "tgamma":
diff --git a/sysdeps/m68k/m680x0/fpu/libm-test-ulps b/sysdeps/m68k/m680x0/fpu/libm-test-ulps
index 7b3e67efaf..573cfdd45a 100644
--- a/sysdeps/m68k/m680x0/fpu/libm-test-ulps
+++ b/sysdeps/m68k/m680x0/fpu/libm-test-ulps
@@ -1160,15 +1160,12 @@  double: 1
 
 Function: "tanh_downward":
 double: 1
-float: 1
 
 Function: "tanh_towardzero":
 double: 1
-float: 1
 
 Function: "tanh_upward":
 double: 1
-float: 1
 
 Function: "tgamma":
 double: 3
diff --git a/sysdeps/microblaze/libm-test-ulps b/sysdeps/microblaze/libm-test-ulps
index c9fc2aa5aa..f7eac16221 100644
--- a/sysdeps/microblaze/libm-test-ulps
+++ b/sysdeps/microblaze/libm-test-ulps
@@ -234,7 +234,6 @@  double: 2
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tgamma":
 double: 5
diff --git a/sysdeps/mips/mips32/libm-test-ulps b/sysdeps/mips/mips32/libm-test-ulps
index 2155853acf..418887d215 100644
--- a/sysdeps/mips/mips32/libm-test-ulps
+++ b/sysdeps/mips/mips32/libm-test-ulps
@@ -1054,19 +1054,15 @@  double: 1
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 
 Function: "tanh_upward":
 double: 3
-float: 3
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/mips/mips64/libm-test-ulps b/sysdeps/mips/mips64/libm-test-ulps
index c4dfef0b23..fb2689efb7 100644
--- a/sysdeps/mips/mips64/libm-test-ulps
+++ b/sysdeps/mips/mips64/libm-test-ulps
@@ -1340,22 +1340,18 @@  ldouble: 1
 
 Function: "tanh":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 ldouble: 3
 
 Function: "tgamma":
diff --git a/sysdeps/or1k/fpu/libm-test-ulps b/sysdeps/or1k/fpu/libm-test-ulps
index f352f71c7d..1acfd0fcaf 100644
--- a/sysdeps/or1k/fpu/libm-test-ulps
+++ b/sysdeps/or1k/fpu/libm-test-ulps
@@ -988,19 +988,15 @@  double: 1
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 
 Function: "tanh_upward":
 double: 3
-float: 3
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/or1k/nofpu/libm-test-ulps b/sysdeps/or1k/nofpu/libm-test-ulps
index a69026e9ee..d0a00f9de1 100644
--- a/sysdeps/or1k/nofpu/libm-test-ulps
+++ b/sysdeps/or1k/nofpu/libm-test-ulps
@@ -978,19 +978,15 @@  double: 1
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 
 Function: "tanh_upward":
 double: 3
-float: 3
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/powerpc/fpu/libm-test-ulps b/sysdeps/powerpc/fpu/libm-test-ulps
index 210ea0a26b..4d22d956cd 100644
--- a/sysdeps/powerpc/fpu/libm-test-ulps
+++ b/sysdeps/powerpc/fpu/libm-test-ulps
@@ -1721,25 +1721,21 @@  ldouble: 3
 
 Function: "tanh":
 double: 2
-float: 2
 float128: 2
 ldouble: 1
 
 Function: "tanh_downward":
 double: 3
-float: 3
 float128: 4
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 float128: 3
 ldouble: 4
 
 Function: "tanh_upward":
 double: 3
-float: 3
 float128: 3
 ldouble: 6
 
diff --git a/sysdeps/powerpc/nofpu/libm-test-ulps b/sysdeps/powerpc/nofpu/libm-test-ulps
index c2a0a64d50..244345f934 100644
--- a/sysdeps/powerpc/nofpu/libm-test-ulps
+++ b/sysdeps/powerpc/nofpu/libm-test-ulps
@@ -1456,22 +1456,18 @@  ldouble: 3
 
 Function: "tanh":
 double: 2
-float: 2
 ldouble: 1
 
 Function: "tanh_downward":
 double: 3
-float: 3
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 ldouble: 4
 
 Function: "tanh_upward":
 double: 3
-float: 3
 ldouble: 6
 
 Function: "tgamma":
diff --git a/sysdeps/riscv/nofpu/libm-test-ulps b/sysdeps/riscv/nofpu/libm-test-ulps
index b29beefdba..22041cf093 100644
--- a/sysdeps/riscv/nofpu/libm-test-ulps
+++ b/sysdeps/riscv/nofpu/libm-test-ulps
@@ -1269,22 +1269,18 @@  ldouble: 1
 
 Function: "tanh":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 ldouble: 3
 
 Function: "tgamma":
diff --git a/sysdeps/riscv/rvd/libm-test-ulps b/sysdeps/riscv/rvd/libm-test-ulps
index b78c11ec09..511d6a3b90 100644
--- a/sysdeps/riscv/rvd/libm-test-ulps
+++ b/sysdeps/riscv/rvd/libm-test-ulps
@@ -1327,22 +1327,18 @@  ldouble: 1
 
 Function: "tanh":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 ldouble: 3
 
 Function: "tgamma":
diff --git a/sysdeps/s390/fpu/libm-test-ulps b/sysdeps/s390/fpu/libm-test-ulps
index 2beaf10dc4..528d1ade6e 100644
--- a/sysdeps/s390/fpu/libm-test-ulps
+++ b/sysdeps/s390/fpu/libm-test-ulps
@@ -1326,22 +1326,18 @@  ldouble: 1
 
 Function: "tanh":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 ldouble: 3
 
 Function: "tgamma":
diff --git a/sysdeps/sh/libm-test-ulps b/sysdeps/sh/libm-test-ulps
index 002218c7fa..783ee44a7b 100644
--- a/sysdeps/sh/libm-test-ulps
+++ b/sysdeps/sh/libm-test-ulps
@@ -488,11 +488,9 @@  double: 1
 
 Function: "tanh":
 double: 2
-float: 2
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 
 Function: "tgamma":
 double: 9
diff --git a/sysdeps/sparc/fpu/libm-test-ulps b/sysdeps/sparc/fpu/libm-test-ulps
index 72ecefff12..dbafba668e 100644
--- a/sysdeps/sparc/fpu/libm-test-ulps
+++ b/sysdeps/sparc/fpu/libm-test-ulps
@@ -1340,22 +1340,18 @@  ldouble: 1
 
 Function: "tanh":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "tanh_downward":
 double: 3
-float: 3
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 ldouble: 3
 
 Function: "tgamma":
diff --git a/sysdeps/x86_64/fpu/libm-test-ulps b/sysdeps/x86_64/fpu/libm-test-ulps
index 038622d624..7df7b51a3f 100644
--- a/sysdeps/x86_64/fpu/libm-test-ulps
+++ b/sysdeps/x86_64/fpu/libm-test-ulps
@@ -2140,25 +2140,21 @@  float: 2
 
 Function: "tanh":
 double: 2
-float: 2
 float128: 2
 ldouble: 3
 
 Function: "tanh_downward":
 double: 3
-float: 3
 float128: 4
 ldouble: 4
 
 Function: "tanh_towardzero":
 double: 2
-float: 2
 float128: 3
 ldouble: 3
 
 Function: "tanh_upward":
 double: 3
-float: 3
 float128: 3
 ldouble: 4