math: Use sinpif from CORE-MATH

The CORE-MATH implementation is correctly rounded (for any rounding mode)
and shows better performance to the generic sinpif.

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                      47.5710        38.4455        19.18%
x86_64v2                    46.8828        40.7563        13.07%
x86_64v3                    44.0034        34.1497        22.39%
aarch64 (Neoverse)          19.2493        14.1968        26.25%
power8                      23.5312        16.3854        30.37%
power10                     22.6485        10.2888        54.57%

reciprocal-throughput        master        patched   improvement
x86_64                      21.8858        11.6717        46.67%
x86_64v2                    22.0620        11.9853        45.67%
x86_64v3                    21.5653        11.3291        47.47%
aarch64 (Neoverse)          13.0615         6.5499        49.85%
power8                      16.2030         6.9580        57.06%
power10                     12.8911         4.2858        66.75%

Reviewed-by: DJ Delorie <dj@redhat.com>

19 files changed, 138 insertions, 59 deletions

diff --git a/SHARED-FILES b/SHARED-FILES
index 3ce38d1..c108f3b 100644
--- a/SHARED-FILES
+++ b/SHARED-FILES
@@ -354,3 +354,7 @@ sysdeps/ieee754/flt-32/s_cospif.c:
   (src/binary32/cospi/cospif.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_sinpif.c:
+  (src/binary32/sinpi/sinpif.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 a15f3ef..c6c93aa 100644
--- a/sysdeps/aarch64/libm-test-ulps
+++ b/sysdeps/aarch64/libm-test-ulps
@@ -1610,7 +1610,6 @@ ldouble: 4
 
 Function: "sinpi":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_advsimd":
@@ -1619,7 +1618,6 @@ float: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_sve":
@@ -1628,12 +1626,10 @@ float: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 ldouble: 2
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 ldouble: 2
 
 Function: "tan":
diff --git a/sysdeps/arc/fpu/libm-test-ulps b/sysdeps/arc/fpu/libm-test-ulps
index f2acbf4..65ebf6f 100644
--- a/sysdeps/arc/fpu/libm-test-ulps
+++ b/sysdeps/arc/fpu/libm-test-ulps
@@ -1101,19 +1101,15 @@ double: 3
 
 Function: "sinpi":
 double: 2
-float: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 
 Function: "tan":
 double: 1
diff --git a/sysdeps/arc/nofpu/libm-test-ulps b/sysdeps/arc/nofpu/libm-test-ulps
index 8716e5d..3ba4f01 100644
--- a/sysdeps/arc/nofpu/libm-test-ulps
+++ b/sysdeps/arc/nofpu/libm-test-ulps
@@ -265,7 +265,6 @@ double: 2
 
 Function: "sinpi":
 double: 2
-float: 2
 
 Function: "tanh":
 double: 2
diff --git a/sysdeps/arm/libm-test-ulps b/sysdeps/arm/libm-test-ulps
index 647f929..f887712 100644
--- a/sysdeps/arm/libm-test-ulps
+++ b/sysdeps/arm/libm-test-ulps
@@ -1097,19 +1097,15 @@ double: 3
 
 Function: "sinpi":
 double: 2
-float: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 
 Function: "tan_downward":
 double: 1
diff --git a/sysdeps/hppa/fpu/libm-test-ulps b/sysdeps/hppa/fpu/libm-test-ulps
index 88f7701..10f7f2e 100644
--- a/sysdeps/hppa/fpu/libm-test-ulps
+++ b/sysdeps/hppa/fpu/libm-test-ulps
@@ -1123,19 +1123,15 @@ double: 3
 
 Function: "sinpi":
 double: 2
-float: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 
 Function: "tan":
 double: 1
diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index 3906695..77aa715 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -1691,25 +1691,21 @@ ldouble: 5
 
 Function: "sinpi":
 double: 2
-float: 2
 float128: 2
 ldouble: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 float128: 2
 ldouble: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 float128: 2
 ldouble: 2
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 float128: 2
 ldouble: 2
 
diff --git a/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps b/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps
index a8c4723..7168d57 100644
--- a/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps
+++ b/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps
@@ -1696,25 +1696,21 @@ ldouble: 5
 
 Function: "sinpi":
 double: 2
-float: 2
 float128: 2
 ldouble: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 float128: 2
 ldouble: 3
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 float128: 2
 ldouble: 2
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 float128: 2
 ldouble: 2
 
diff --git a/sysdeps/ieee754/flt-32/s_sinpif.c b/sysdeps/ieee754/flt-32/s_sinpif.c
new file mode 100644
index 0000000..772ea42
--- /dev/null
+++ b/sysdeps/ieee754/flt-32/s_sinpif.c
@@ -0,0 +1,134 @@
+/* Correctly-rounded sine of binary32 value for angles in half-revolutions
+
+Copyright (c) 2022-2025 Alexei Sibidanov.
+
+The original version of this file was copied from the CORE-MATH
+project (src/binary32/sinpi/sinpif.c, revision f786e13).
+
+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 <math.h>
+#include <stdint.h>
+#include <errno.h>
+#include <fenv.h>
+#include <libm-alias-float.h>
+#include "math_config.h"
+
+float
+__sinpif (float x)
+{
+  static const double sn[] =
+    {
+      0x1.921fb54442d0fp-37, -0x1.4abbce6102b94p-112, 0x1.4669fa3c58463p-189
+    };
+  static const double cn[] =
+    {
+      -0x1.3bd3cc9be45cfp-74, 0x1.03c1f08088742p-150, -0x1.55d1e5eff55a5p-228
+    };
+  static const double S[] =
+    {
+       0x0p+0,                 0x1.91f65f10dd814p-5,    0x1.917a6bc29b42cp-4,
+       0x1.2c8106e8e613ap-3,   0x1.8f8b83c69a60bp-3,    0x1.f19f97b215f1bp-3,
+       0x1.294062ed59f06p-2,   0x1.58f9a75ab1fddp-2,    0x1.87de2a6aea963p-2,
+       0x1.b5d1009e15ccp-2,    0x1.e2b5d3806f63bp-2,    0x1.073879922ffeep-1,
+       0x1.1c73b39ae68c8p-1,   0x1.30ff7fce17035p-1,    0x1.44cf325091dd6p-1,
+       0x1.57d69348cecap-1,    0x1.6a09e667f3bcdp-1,    0x1.7b5df226aafafp-1,
+       0x1.8bc806b151741p-1,   0x1.9b3e047f38741p-1,    0x1.a9b66290ea1a3p-1,
+       0x1.b728345196e3ep-1,   0x1.c38b2f180bdb1p-1,    0x1.ced7af43cc773p-1,
+       0x1.d906bcf328d46p-1,   0x1.e212104f686e5p-1,    0x1.e9f4156c62ddap-1,
+       0x1.f0a7efb9230d7p-1,   0x1.f6297cff75cbp-1,     0x1.fa7557f08a517p-1,
+       0x1.fd88da3d12526p-1,   0x1.ff621e3796d7ep-1,    0x1p+0,
+       0x1.ff621e3796d7ep-1,   0x1.fd88da3d12526p-1,    0x1.fa7557f08a517p-1,
+       0x1.f6297cff75cbp-1,    0x1.f0a7efb9230d7p-1,    0x1.e9f4156c62ddap-1,
+       0x1.e212104f686e5p-1,   0x1.d906bcf328d46p-1,    0x1.ced7af43cc773p-1,
+       0x1.c38b2f180bdb1p-1,   0x1.b728345196e3ep-1,    0x1.a9b66290ea1a3p-1,
+       0x1.9b3e047f38741p-1,   0x1.8bc806b151741p-1,    0x1.7b5df226aafafp-1,
+       0x1.6a09e667f3bcdp-1,   0x1.57d69348cecap-1,     0x1.44cf325091dd6p-1,
+       0x1.30ff7fce17035p-1,   0x1.1c73b39ae68c8p-1,    0x1.073879922ffeep-1,
+       0x1.e2b5d3806f63bp-2,   0x1.b5d1009e15ccp-2,     0x1.87de2a6aea963p-2,
+       0x1.58f9a75ab1fddp-2,   0x1.294062ed59f06p-2,    0x1.f19f97b215f1bp-3,
+       0x1.8f8b83c69a60bp-3,   0x1.2c8106e8e613ap-3,    0x1.917a6bc29b42cp-4,
+       0x1.91f65f10dd814p-5,   0x0p+0,                 -0x1.91f65f10dd814p-5,
+      -0x1.917a6bc29b42cp-4,  -0x1.2c8106e8e613ap-3,   -0x1.8f8b83c69a60bp-3,
+      -0x1.f19f97b215f1bp-3,  -0x1.294062ed59f06p-2,   -0x1.58f9a75ab1fddp-2,
+      -0x1.87de2a6aea963p-2,  -0x1.b5d1009e15ccp-2,    -0x1.e2b5d3806f63bp-2,
+      -0x1.073879922ffeep-1,  -0x1.1c73b39ae68c8p-1,   -0x1.30ff7fce17035p-1,
+      -0x1.44cf325091dd6p-1,  -0x1.57d69348cecap-1,    -0x1.6a09e667f3bcdp-1,
+      -0x1.7b5df226aafafp-1,  -0x1.8bc806b151741p-1,   -0x1.9b3e047f38741p-1,
+      -0x1.a9b66290ea1a3p-1,  -0x1.b728345196e3ep-1,   -0x1.c38b2f180bdb1p-1,
+      -0x1.ced7af43cc773p-1,  -0x1.d906bcf328d46p-1,   -0x1.e212104f686e5p-1,
+      -0x1.e9f4156c62ddap-1,  -0x1.f0a7efb9230d7p-1,   -0x1.f6297cff75cbp-1,
+      -0x1.fa7557f08a517p-1,  -0x1.fd88da3d12526p-1,   -0x1.ff621e3796d7ep-1,
+      -0x1p+0,                -0x1.ff621e3796d7ep-1,   -0x1.fd88da3d12526p-1,
+      -0x1.fa7557f08a517p-1,  -0x1.f6297cff75cbp-1,    -0x1.f0a7efb9230d7p-1,
+      -0x1.e9f4156c62ddap-1,  -0x1.e212104f686e5p-1,   -0x1.d906bcf328d46p-1,
+      -0x1.ced7af43cc773p-1,  -0x1.c38b2f180bdb1p-1,   -0x1.b728345196e3ep-1,
+      -0x1.a9b66290ea1a3p-1,  -0x1.9b3e047f38741p-1,   -0x1.8bc806b151741p-1,
+      -0x1.7b5df226aafafp-1,  -0x1.6a09e667f3bcdp-1,   -0x1.57d69348cecap-1,
+      -0x1.44cf325091dd6p-1,  -0x1.30ff7fce17035p-1,   -0x1.1c73b39ae68c8p-1,
+      -0x1.073879922ffeep-1,  -0x1.e2b5d3806f63bp-2,   -0x1.b5d1009e15ccp-2,
+      -0x1.87de2a6aea963p-2,  -0x1.58f9a75ab1fddp-2,   -0x1.294062ed59f06p-2,
+      -0x1.f19f97b215f1bp-3,  -0x1.8f8b83c69a60bp-3,   -0x1.2c8106e8e613ap-3,
+      -0x1.917a6bc29b42cp-4,  -0x1.91f65f10dd814p-5
+    };
+
+  uint32_t ix = asuint (x);
+  int32_t e = (ix >> 23) & 0xff;
+  if (__glibc_unlikely (e == 0xff))
+    {
+      if (!(ix << 9))
+        return __math_invalidf (x);
+      return x + x; /* nan */
+    }
+  int32_t m = (ix & ~0u >> 9) | 1 << 23, sgn = ix;
+  sgn >>= 31;
+  m = (m ^ sgn) - sgn;
+  int32_t s = 143 - e;
+  if (__glibc_unlikely (s < 0))
+    {
+      if (__glibc_unlikely (s < -6))
+	return copysignf (0.0f, x);
+      int32_t iq = m << (-s - 1);
+      iq &= 127;
+      if (iq == 0 || iq == 64)
+	return copysignf (0.0f, x);
+      return S[iq];
+    }
+  else if (__glibc_unlikely (s > 30))
+    {
+      double z = x, z2 = z * z;
+      return z * (0x1.921fb54442d18p+1 + z2 * (-0x1.4abbce625be53p+2));
+    }
+  int32_t si = 25 - s;
+  if (__glibc_unlikely (si >= 0 && (m << si) == 0))
+    return copysignf (0.0f, x);
+
+  int32_t k = m << (31 - s);
+  double z = k, z2 = z * z;
+  double fs = sn[0] + z2 * (sn[1] + z2 * sn[2]);
+  double fc = cn[0] + z2 * (cn[1] + z2 * cn[2]);
+  uint32_t iq = m >> s;
+  iq = (iq + 1) >> 1;
+  uint32_t is = iq & 127, ic = (iq + 32) & 127;
+  double ts = S[is], tc = S[ic];
+  double r = ts + (ts * z2) * fc + (tc * z) * fs;
+  return r;
+}
+libm_alias_float (__sinpi, sinpi)
diff --git a/sysdeps/loongarch/lp64/libm-test-ulps b/sysdeps/loongarch/lp64/libm-test-ulps
index fe84c60..4fadba4 100644
--- a/sysdeps/loongarch/lp64/libm-test-ulps
+++ b/sysdeps/loongarch/lp64/libm-test-ulps
@@ -1389,22 +1389,18 @@ ldouble: 4
 
 Function: "sinpi":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 ldouble: 2
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 ldouble: 2
 
 Function: "tan":
diff --git a/sysdeps/mips/mips64/libm-test-ulps b/sysdeps/mips/mips64/libm-test-ulps
index ddc78d0..5177b54 100644
--- a/sysdeps/mips/mips64/libm-test-ulps
+++ b/sysdeps/mips/mips64/libm-test-ulps
@@ -1402,22 +1402,18 @@ ldouble: 4
 
 Function: "sinpi":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 ldouble: 2
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 ldouble: 2
 
 Function: "tan":
diff --git a/sysdeps/or1k/fpu/libm-test-ulps b/sysdeps/or1k/fpu/libm-test-ulps
index 884b4cc..1fb4ec5 100644
--- a/sysdeps/or1k/fpu/libm-test-ulps
+++ b/sysdeps/or1k/fpu/libm-test-ulps
@@ -1082,19 +1082,15 @@ double: 3
 
 Function: "sinpi":
 double: 2
-float: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 
 Function: "tan_downward":
 double: 1
diff --git a/sysdeps/or1k/nofpu/libm-test-ulps b/sysdeps/or1k/nofpu/libm-test-ulps
index aec66e0..aff11b5 100644
--- a/sysdeps/or1k/nofpu/libm-test-ulps
+++ b/sysdeps/or1k/nofpu/libm-test-ulps
@@ -991,7 +991,6 @@ double: 3
 
 Function: "sinpi":
 double: 2
-float: 2
 
 Function: "tan_downward":
 double: 1
diff --git a/sysdeps/powerpc/fpu/libm-test-ulps b/sysdeps/powerpc/fpu/libm-test-ulps
index bdf0c98..e59c3e4 100644
--- a/sysdeps/powerpc/fpu/libm-test-ulps
+++ b/sysdeps/powerpc/fpu/libm-test-ulps
@@ -1779,25 +1779,21 @@ ldouble: 6
 
 Function: "sinpi":
 double: 2
-float: 2
 float128: 2
 ldouble: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 float128: 2
 ldouble: 5
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 float128: 2
 ldouble: 8
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 float128: 2
 ldouble: 8
 
diff --git a/sysdeps/riscv/nofpu/libm-test-ulps b/sysdeps/riscv/nofpu/libm-test-ulps
index 08af249..2545d0e 100644
--- a/sysdeps/riscv/nofpu/libm-test-ulps
+++ b/sysdeps/riscv/nofpu/libm-test-ulps
@@ -1271,7 +1271,6 @@ ldouble: 4
 
 Function: "sinpi":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "tan":
diff --git a/sysdeps/riscv/rvd/libm-test-ulps b/sysdeps/riscv/rvd/libm-test-ulps
index 6644e38..94534a4 100644
--- a/sysdeps/riscv/rvd/libm-test-ulps
+++ b/sysdeps/riscv/rvd/libm-test-ulps
@@ -1401,22 +1401,18 @@ ldouble: 4
 
 Function: "sinpi":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 ldouble: 2
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 ldouble: 2
 
 Function: "tan":
diff --git a/sysdeps/s390/fpu/libm-test-ulps b/sysdeps/s390/fpu/libm-test-ulps
index 6318760..2c89048 100644
--- a/sysdeps/s390/fpu/libm-test-ulps
+++ b/sysdeps/s390/fpu/libm-test-ulps
@@ -1387,22 +1387,18 @@ ldouble: 4
 
 Function: "sinpi":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 ldouble: 2
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 ldouble: 2
 
 Function: "tan":
diff --git a/sysdeps/sparc/fpu/libm-test-ulps b/sysdeps/sparc/fpu/libm-test-ulps
index 2c319f8..3af2355 100644
--- a/sysdeps/sparc/fpu/libm-test-ulps
+++ b/sysdeps/sparc/fpu/libm-test-ulps
@@ -1402,22 +1402,18 @@ ldouble: 4
 
 Function: "sinpi":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 ldouble: 2
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 ldouble: 2
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 ldouble: 2
 
 Function: "tan":
diff --git a/sysdeps/x86_64/fpu/libm-test-ulps b/sysdeps/x86_64/fpu/libm-test-ulps
index e2cf3e0..f6da5ba 100644
--- a/sysdeps/x86_64/fpu/libm-test-ulps
+++ b/sysdeps/x86_64/fpu/libm-test-ulps
@@ -2197,25 +2197,21 @@ float: 1
 
 Function: "sinpi":
 double: 2
-float: 2
 float128: 2
 ldouble: 2
 
 Function: "sinpi_downward":
 double: 2
-float: 2
 float128: 2
 ldouble: 3
 
 Function: "sinpi_towardzero":
 double: 2
-float: 1
 float128: 2
 ldouble: 2
 
 Function: "sinpi_upward":
 double: 2
-float: 3
 float128: 2
 ldouble: 2