[PATCH v2 16/25] math: Use acosf from CORE-MATH
Adhemerval Zanella
adhemerval.zanella@linaro.org
Wed Dec 4 16:37:51 GMT 2024
The CORE-MATH implementation is correctly rounded (for any rounding mode)
and shows slight better performance to the generic acosf.
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 52.5098 36.6312 30.24%
x86_64v2 53.0217 37.3091 29.63%
x86_64v3 42.8501 32.3977 24.39%
i686 207.3960 109.4000 47.25%
aarch64 21.3694 13.7871 35.48%
power10 14.5542 7.2891 49.92%
reciprocal-throughput master patched improvement
x86_64 14.1487 15.9508 -12.74%
x86_64v2 14.3293 16.1899 -12.98%
x86_64v3 13.6563 12.6161 7.62%
i686 158.4060 45.7354 71.13%
aarch64 12.5515 9.19233 26.76%
power10 5.7868 3.3487 42.13%
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/e_acosf.S | 23 ---
sysdeps/ieee754/flt-32/e_acosf.c | 195 +++++++++++++++++---------
sysdeps/loongarch/lp64/libm-test-ulps | 4 -
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 -
25 files changed, 132 insertions(+), 170 deletions(-)
delete mode 100644 sysdeps/i386/fpu/e_acosf.S
diff --git a/SHARED-FILES b/SHARED-FILES
index 9f4de81b66..3d32f0f3b6 100644
--- a/SHARED-FILES
+++ b/SHARED-FILES
@@ -294,3 +294,7 @@ sysdeps/ieee754/flt-32/s_tanf.c:
functions to handle errno, overflow, and underflow. It was changed
to use an internal wrapper for 128 bit unsigned integer operations
for ABIs that do not support the type natively.
+sysdeps/ieee754/flt-32/e_acosf.c:
+ (src/binary32/acos/acosf.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 89b166b71b..a593a4f8cb 100644
--- a/sysdeps/aarch64/libm-test-ulps
+++ b/sysdeps/aarch64/libm-test-ulps
@@ -3,7 +3,6 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
ldouble: 1
Function: "acos_advsimd":
@@ -12,7 +11,6 @@ float: 1
Function: "acos_downward":
double: 1
-float: 1
ldouble: 1
Function: "acos_sve":
@@ -21,12 +19,10 @@ float: 1
Function: "acos_towardzero":
double: 1
-float: 1
ldouble: 1
Function: "acos_upward":
double: 1
-float: 1
ldouble: 1
Function: "acosh":
diff --git a/sysdeps/alpha/fpu/libm-test-ulps b/sysdeps/alpha/fpu/libm-test-ulps
index 0f7628b75b..aac2e31951 100644
--- a/sysdeps/alpha/fpu/libm-test-ulps
+++ b/sysdeps/alpha/fpu/libm-test-ulps
@@ -3,22 +3,18 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
ldouble: 1
Function: "acos_downward":
double: 1
-float: 1
ldouble: 1
Function: "acos_towardzero":
double: 1
-float: 1
ldouble: 1
Function: "acos_upward":
double: 1
-float: 1
ldouble: 1
Function: "acosh":
diff --git a/sysdeps/arc/fpu/libm-test-ulps b/sysdeps/arc/fpu/libm-test-ulps
index 4d4b22db47..b80f97b5ed 100644
--- a/sysdeps/arc/fpu/libm-test-ulps
+++ b/sysdeps/arc/fpu/libm-test-ulps
@@ -3,19 +3,15 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
Function: "acos_downward":
double: 1
-float: 1
Function: "acos_towardzero":
double: 1
-float: 1
Function: "acos_upward":
double: 1
-float: 1
Function: "acosh":
double: 3
diff --git a/sysdeps/arc/nofpu/libm-test-ulps b/sysdeps/arc/nofpu/libm-test-ulps
index 4faf784aad..de1fdd9b1e 100644
--- a/sysdeps/arc/nofpu/libm-test-ulps
+++ b/sysdeps/arc/nofpu/libm-test-ulps
@@ -3,7 +3,6 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/arm/libm-test-ulps b/sysdeps/arm/libm-test-ulps
index c80122de79..a2e6549e65 100644
--- a/sysdeps/arm/libm-test-ulps
+++ b/sysdeps/arm/libm-test-ulps
@@ -3,19 +3,15 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
Function: "acos_downward":
double: 1
-float: 1
Function: "acos_towardzero":
double: 1
-float: 1
Function: "acos_upward":
double: 1
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/csky/fpu/libm-test-ulps b/sysdeps/csky/fpu/libm-test-ulps
index d67cfe1785..3e7b07e81a 100644
--- a/sysdeps/csky/fpu/libm-test-ulps
+++ b/sysdeps/csky/fpu/libm-test-ulps
@@ -2,19 +2,15 @@
# Maximal error of functions:
Function: "acos":
-float: 1
Function: "acos_downward":
double: 1
-float: 1
Function: "acos_towardzero":
double: 1
-float: 1
Function: "acos_upward":
double: 1
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/csky/nofpu/libm-test-ulps b/sysdeps/csky/nofpu/libm-test-ulps
index 6cdf9fd034..58bd5eaa15 100644
--- a/sysdeps/csky/nofpu/libm-test-ulps
+++ b/sysdeps/csky/nofpu/libm-test-ulps
@@ -2,19 +2,15 @@
# Maximal error of functions:
Function: "acos":
-float: 1
Function: "acos_downward":
double: 1
-float: 1
Function: "acos_towardzero":
double: 1
-float: 1
Function: "acos_upward":
double: 1
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/hppa/fpu/libm-test-ulps b/sysdeps/hppa/fpu/libm-test-ulps
index 9ed2204d38..ecef024df5 100644
--- a/sysdeps/hppa/fpu/libm-test-ulps
+++ b/sysdeps/hppa/fpu/libm-test-ulps
@@ -3,19 +3,15 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
Function: "acos_downward":
double: 1
-float: 1
Function: "acos_towardzero":
double: 1
-float: 1
Function: "acos_upward":
double: 1
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/i386/fpu/e_acosf.S b/sysdeps/i386/fpu/e_acosf.S
deleted file mode 100644
index 435dcd9f67..0000000000
--- a/sysdeps/i386/fpu/e_acosf.S
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Public domain.
- */
-
-#include <machine/asm.h>
-#include <libm-alias-finite.h>
-
-RCSID("$NetBSD: $")
-
-/* acos = atan (sqrt(1 - x^2) / x) */
-ENTRY(__ieee754_acosf)
- flds 4(%esp) /* x */
- fld %st
- fmul %st(0) /* x^2 */
- fld1
- fsubp /* 1 - x^2 */
- fsqrt /* sqrt (1 - x^2) */
- fabs
- fxch %st(1)
- fpatan
- ret
-END (__ieee754_acosf)
-libm_alias_finite (__ieee754_acosf, __acosf)
diff --git a/sysdeps/ieee754/flt-32/e_acosf.c b/sysdeps/ieee754/flt-32/e_acosf.c
index e3b3bbc928..cba01221dc 100644
--- a/sysdeps/ieee754/flt-32/e_acosf.c
+++ b/sysdeps/ieee754/flt-32/e_acosf.c
@@ -1,78 +1,139 @@
-/* e_acosf.c -- float version of e_acos.c.
- */
+/* Correctly-rounded arc-cosine 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) 2023-2024 Alexei Sibidanov.
+The original version of this file was copied from the CORE-MATH
+project (file src/binary32/acos/acosf.c, revision 61d7bef).
+
+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:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+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.
+*/
+
+#include <errno.h>
#include <math.h>
#include <math_private.h>
#include <libm-alias-finite.h>
+#include "math_config.h"
-static const float
-one = 1.0000000000e+00, /* 0x3F800000 */
-pi = 3.1415925026e+00, /* 0x40490fda */
-pio2_hi = 1.5707962513e+00, /* 0x3fc90fda */
-pio2_lo = 7.5497894159e-08, /* 0x33a22168 */
-pS0 = 1.6666667163e-01, /* 0x3e2aaaab */
-pS1 = -3.2556581497e-01, /* 0xbea6b090 */
-pS2 = 2.0121252537e-01, /* 0x3e4e0aa8 */
-pS3 = -4.0055535734e-02, /* 0xbd241146 */
-pS4 = 7.9153501429e-04, /* 0x3a4f7f04 */
-pS5 = 3.4793309169e-05, /* 0x3811ef08 */
-qS1 = -2.4033949375e+00, /* 0xc019d139 */
-qS2 = 2.0209457874e+00, /* 0x4001572d */
-qS3 = -6.8828397989e-01, /* 0xbf303361 */
-qS4 = 7.7038154006e-02; /* 0x3d9dc62e */
+static __attribute__ ((noinline)) float
+as_special (float x)
+{
+ const float pih = 0x1.921fb6p+1;
+ const float pil = -0x1p-24f;
+ uint32_t t = asuint (x);
+ if (t == (0x7fu << 23))
+ return 0.0f; /* x=1 */
+ if (t == (0x17fu << 23))
+ return pih + pil; /* x=-1 */
+ uint32_t ax = t << 1;
+ if (ax > (0xffu << 24))
+ return x + x; /* nan */
+ return __math_invalidf (0.0);
+}
+
+static inline double
+poly12 (double z, const double *c)
+{
+ double z2 = z * z, z4 = z2 * z2;
+ double c0 = c[0] + z * c[1];
+ double c2 = c[2] + z * c[3];
+ double c4 = c[4] + z * c[5];
+ double c6 = c[6] + z * c[7];
+ double c8 = c[8] + z * c[9];
+ double c10 = c[10] + z * c[11];
+ c0 += c2 * z2;
+ c4 += c6 * z2;
+ c8 += z2 * c10;
+ c0 += z4 * (c4 + z4 * c8);
+ return c0;
+}
float
-__ieee754_acosf(float x)
+__ieee754_acosf (float x)
{
- float z,p,q,r,w,s,c,df;
- int32_t hx,ix;
- GET_FLOAT_WORD(hx,x);
- ix = hx&0x7fffffff;
- if(ix==0x3f800000) { /* |x|==1 */
- if(hx>0) return 0.0; /* acos(1) = 0 */
- else return pi+(float)2.0*pio2_lo; /* acos(-1)= pi */
- } else if(ix>0x3f800000) { /* |x| >= 1 */
- return (x-x)/(x-x); /* acos(|x|>1) is NaN */
- }
- if(ix<0x3f000000) { /* |x| < 0.5 */
- if(ix<=0x32800000) return pio2_hi+pio2_lo;/*if|x|<=2**-26*/
- z = x*x;
- p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
- q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
- r = p/q;
- return pio2_hi - (x - (pio2_lo-x*r));
- } else if (hx<0) { /* x < -0.5 */
- z = (one+x)*(float)0.5;
- p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
- q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
- s = sqrtf(z);
- r = p/q;
- w = r*s-pio2_lo;
- return pi - (float)2.0*(s+w);
- } else { /* x > 0.5 */
- int32_t idf;
- z = (one-x)*(float)0.5;
- s = sqrtf(z);
- df = s;
- GET_FLOAT_WORD(idf,df);
- SET_FLOAT_WORD(df,idf&0xfffff000);
- c = (z-df*df)/(s+df);
- p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
- q = one+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
- r = p/q;
- w = r*s+c;
- return (float)2.0*(df+w);
- }
+ const double pi2 = 0x1.921fb54442d18p+0;
+ static const double o[] = { 0, 0x1.921fb54442d18p+1 };
+ double xs = x;
+ double r;
+ uint32_t t = asuint (x);
+ uint32_t ax = t << 1;
+ if (__glibc_unlikely (ax >= 0x7f<<24))
+ return as_special (x);
+ if (__glibc_likely (ax < 0x7ec2a1dcu)) /* |x| < 0x1.c2a1dcp-1 */
+ {
+ static const double b[] =
+ {
+ 0x1.fffffffd9ccb8p-1, 0x1.5555c94838007p-3, 0x1.32ded4b7c20fap-4,
+ 0x1.8566df703309ep-5, -0x1.980c959bec9a3p-6, 0x1.56fbb04998344p-1,
+ -0x1.403d8e4c49f52p+2, 0x1.b06c3e9f311eap+4, -0x1.9ea97c4e2c21fp+6,
+ 0x1.200b8261cc61bp+8, -0x1.2274c2799a5c7p+9, 0x1.a558a59cc19d3p+9,
+ -0x1.aca4b6a529ffp+9, 0x1.228744703f813p+9, -0x1.d7dbb0b322228p+7,
+ 0x1.5c2018c0c0105p+5
+ };
+ /* Avoid spurious underflow exception. */
+ if (__glibc_unlikely (ax <= 0x40000000u)) /* |x| < 2^-63 */
+ return (float) pi2;
+ double z = xs;
+ double z2 = z * z;
+ double z4 = z2 * z2;
+ double z8 = z4 * z4;
+ double z16 = z8 * z8;
+ r = z * ((((b[0] + z2 * b[1]) + z4 * (b[2] + z2 * b[3]))
+ + z8 * ((b[4] + z2 * b[5]) + z4 * (b[6] + z2 * b[7])))
+ + z16 * (((b[8] + z2 * b[9]) + z4 * (b[10] + z2 * b[11]))
+ + z8
+ * ((b[12] + z2 * b[13])+ z4 * (b[14] + z2 * b[15]))));
+ float ub = 0x1.921fb54574191p+0 - r;
+ float lb = 0x1.921fb543118ap+0 - r;
+ if (ub == lb)
+ return ub;
+ }
+ /* accurate path */
+ if (ax < (0x7eu << 24))
+ {
+ static const double c[] =
+ {
+ 0x1.555555555529cp-3, 0x1.333333337e0ddp-4, 0x1.6db6db3b4465ep-5,
+ 0x1.f1c72e13ac306p-6, 0x1.6e89cebe06bc4p-6, 0x1.1c6dcf5289094p-6,
+ 0x1.c6dbbcc7c6315p-7, 0x1.8f8dc2615e996p-7, 0x1.a5833b7bf15e8p-8,
+ 0x1.43f44ace1665cp-6, -0x1.0fb17df881c73p-6, 0x1.07520c026b2d6p-5
+ };
+ if (t == 0x328885a3u)
+ return 0x1.921fb6p+0f + 0x1p-25;
+ if (t == 0x39826222u)
+ return 0x1.920f6ap+0f + 0x1p-25;
+ double x2 = xs * xs;
+ r = (pi2 - xs) - (xs * x2) * poly12 (x2, c);
+ }
+ else
+ {
+ static const double c[] =
+ {
+ 0x1.6a09e667f3bcbp+0, 0x1.e2b7dddff2db9p-4, 0x1.b27247ab42dbcp-6,
+ 0x1.02995cc4e0744p-7, 0x1.5ffb0276ec8eap-9, 0x1.033885a928decp-10,
+ 0x1.911f2be23f8c7p-12, 0x1.4c3c55d2437fdp-13, 0x1.af477e1d7b461p-15,
+ 0x1.abd6bdff67dcbp-15, -0x1.1717e86d0fa28p-16, 0x1.6ff526de46023p-16
+ };
+ double bx = fabs (xs);
+ double z = 1.0 - bx;
+ double s = copysign (sqrt (z), xs);
+ r = o[t >> 31] + s * poly12 (z, c);
+ }
+ return r;
}
libm_alias_finite (__ieee754_acosf, __acosf)
diff --git a/sysdeps/loongarch/lp64/libm-test-ulps b/sysdeps/loongarch/lp64/libm-test-ulps
index 03fa6a410a..67bf2d2f9f 100644
--- a/sysdeps/loongarch/lp64/libm-test-ulps
+++ b/sysdeps/loongarch/lp64/libm-test-ulps
@@ -3,22 +3,18 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
ldouble: 1
Function: "acos_downward":
double: 1
-float: 1
ldouble: 1
Function: "acos_towardzero":
double: 1
-float: 1
ldouble: 1
Function: "acos_upward":
double: 1
-float: 1
ldouble: 1
Function: "acosh":
diff --git a/sysdeps/microblaze/libm-test-ulps b/sysdeps/microblaze/libm-test-ulps
index c96652a022..c93ebfa21b 100644
--- a/sysdeps/microblaze/libm-test-ulps
+++ b/sysdeps/microblaze/libm-test-ulps
@@ -2,7 +2,6 @@
# Maximal error of functions:
Function: "acos":
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/mips/mips32/libm-test-ulps b/sysdeps/mips/mips32/libm-test-ulps
index 17034d44ba..d23762642b 100644
--- a/sysdeps/mips/mips32/libm-test-ulps
+++ b/sysdeps/mips/mips32/libm-test-ulps
@@ -3,19 +3,15 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
Function: "acos_downward":
double: 1
-float: 1
Function: "acos_towardzero":
double: 1
-float: 1
Function: "acos_upward":
double: 1
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/mips/mips64/libm-test-ulps b/sysdeps/mips/mips64/libm-test-ulps
index a757f69a9a..aece335d6b 100644
--- a/sysdeps/mips/mips64/libm-test-ulps
+++ b/sysdeps/mips/mips64/libm-test-ulps
@@ -3,22 +3,18 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
ldouble: 1
Function: "acos_downward":
double: 1
-float: 1
ldouble: 1
Function: "acos_towardzero":
double: 1
-float: 1
ldouble: 1
Function: "acos_upward":
double: 1
-float: 1
ldouble: 1
Function: "acosh":
diff --git a/sysdeps/or1k/fpu/libm-test-ulps b/sysdeps/or1k/fpu/libm-test-ulps
index 115a73ef26..862ab6b559 100644
--- a/sysdeps/or1k/fpu/libm-test-ulps
+++ b/sysdeps/or1k/fpu/libm-test-ulps
@@ -3,19 +3,15 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
Function: "acos_downward":
double: 1
-float: 1
Function: "acos_towardzero":
double: 1
-float: 1
Function: "acos_upward":
double: 1
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/or1k/nofpu/libm-test-ulps b/sysdeps/or1k/nofpu/libm-test-ulps
index e130fd8a1d..3c364480f4 100644
--- a/sysdeps/or1k/nofpu/libm-test-ulps
+++ b/sysdeps/or1k/nofpu/libm-test-ulps
@@ -3,19 +3,15 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
Function: "acos_downward":
double: 1
-float: 1
Function: "acos_towardzero":
double: 1
-float: 1
Function: "acos_upward":
double: 1
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/powerpc/fpu/libm-test-ulps b/sysdeps/powerpc/fpu/libm-test-ulps
index adaa10fb56..135853f213 100644
--- a/sysdeps/powerpc/fpu/libm-test-ulps
+++ b/sysdeps/powerpc/fpu/libm-test-ulps
@@ -3,25 +3,21 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
float128: 1
ldouble: 1
Function: "acos_downward":
double: 1
-float: 1
float128: 1
ldouble: 3
Function: "acos_towardzero":
double: 1
-float: 1
float128: 1
ldouble: 3
Function: "acos_upward":
double: 1
-float: 1
float128: 1
ldouble: 2
diff --git a/sysdeps/powerpc/nofpu/libm-test-ulps b/sysdeps/powerpc/nofpu/libm-test-ulps
index 2c44e39c2c..44cf9983dc 100644
--- a/sysdeps/powerpc/nofpu/libm-test-ulps
+++ b/sysdeps/powerpc/nofpu/libm-test-ulps
@@ -3,22 +3,18 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
ldouble: 1
Function: "acos_downward":
double: 1
-float: 1
ldouble: 3
Function: "acos_towardzero":
double: 1
-float: 1
ldouble: 3
Function: "acos_upward":
double: 1
-float: 1
ldouble: 2
Function: "acosh":
diff --git a/sysdeps/riscv/nofpu/libm-test-ulps b/sysdeps/riscv/nofpu/libm-test-ulps
index 84b9e15f43..8d3b048e84 100644
--- a/sysdeps/riscv/nofpu/libm-test-ulps
+++ b/sysdeps/riscv/nofpu/libm-test-ulps
@@ -3,22 +3,18 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
ldouble: 1
Function: "acos_downward":
double: 1
-float: 1
ldouble: 1
Function: "acos_towardzero":
double: 1
-float: 1
ldouble: 1
Function: "acos_upward":
double: 1
-float: 1
ldouble: 1
Function: "acosh":
diff --git a/sysdeps/riscv/rvd/libm-test-ulps b/sysdeps/riscv/rvd/libm-test-ulps
index b9446e5a7c..a1d85be3b6 100644
--- a/sysdeps/riscv/rvd/libm-test-ulps
+++ b/sysdeps/riscv/rvd/libm-test-ulps
@@ -3,22 +3,18 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
ldouble: 1
Function: "acos_downward":
double: 1
-float: 1
ldouble: 1
Function: "acos_towardzero":
double: 1
-float: 1
ldouble: 1
Function: "acos_upward":
double: 1
-float: 1
ldouble: 1
Function: "acosh":
diff --git a/sysdeps/s390/fpu/libm-test-ulps b/sysdeps/s390/fpu/libm-test-ulps
index 62d3f145fc..7a3d526d69 100644
--- a/sysdeps/s390/fpu/libm-test-ulps
+++ b/sysdeps/s390/fpu/libm-test-ulps
@@ -3,22 +3,18 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
ldouble: 1
Function: "acos_downward":
double: 1
-float: 1
ldouble: 1
Function: "acos_towardzero":
double: 1
-float: 1
ldouble: 1
Function: "acos_upward":
double: 1
-float: 1
ldouble: 1
Function: "acosh":
diff --git a/sysdeps/sh/libm-test-ulps b/sysdeps/sh/libm-test-ulps
index a6d271eb3f..d1e5b05531 100644
--- a/sysdeps/sh/libm-test-ulps
+++ b/sysdeps/sh/libm-test-ulps
@@ -2,11 +2,9 @@
# Maximal error of functions:
Function: "acos":
-float: 1
Function: "acos_towardzero":
double: 1
-float: 1
Function: "acosh":
double: 2
diff --git a/sysdeps/sparc/fpu/libm-test-ulps b/sysdeps/sparc/fpu/libm-test-ulps
index 9276ff9726..6a70b6f5ea 100644
--- a/sysdeps/sparc/fpu/libm-test-ulps
+++ b/sysdeps/sparc/fpu/libm-test-ulps
@@ -3,22 +3,18 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
ldouble: 1
Function: "acos_downward":
double: 1
-float: 1
ldouble: 1
Function: "acos_towardzero":
double: 1
-float: 1
ldouble: 1
Function: "acos_upward":
double: 1
-float: 1
ldouble: 1
Function: "acosh":
diff --git a/sysdeps/x86_64/fpu/libm-test-ulps b/sysdeps/x86_64/fpu/libm-test-ulps
index f4360598a9..ff532cea1e 100644
--- a/sysdeps/x86_64/fpu/libm-test-ulps
+++ b/sysdeps/x86_64/fpu/libm-test-ulps
@@ -3,25 +3,21 @@
# Maximal error of functions:
Function: "acos":
double: 1
-float: 1
float128: 1
ldouble: 2
Function: "acos_downward":
double: 1
-float: 1
float128: 1
ldouble: 2
Function: "acos_towardzero":
double: 1
-float: 1
float128: 1
ldouble: 2
Function: "acos_upward":
double: 1
-float: 1
float128: 1
ldouble: 2
--
2.43.0
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