Implement C23 logp1

C23 adds various <math.h> function families originally defined in TS
18661-4.  Add the logp1 functions (aliases for log1p functions - the
name is intended to be more consistent with the new log2p1 and
log10p1, where clearly it would have been very confusing to name those
functions log21p and log101p).  As aliases rather than new functions,
the content of this patch is somewhat different from those actually
adding new functions.

Tests are shared with log1p, so this patch *does* mechanically update
all affected libm-test-ulps files to expect the same errors for both
functions.

The vector versions of log1p on aarch64 and x86_64 are *not* updated
to have logp1 aliases (and thus there are no corresponding header,
tests, abilist or ulps changes for vector functions either).  It would
be reasonable for such vector aliases and corresponding changes to
other files to be made separately.  For now, the log1p tests instead
avoid testing logp1 in the vector case (a Makefile change is needed to
avoid problems with grep, used in generating the .c files for vector
function tests, matching more than one ALL_RM_TEST line in a file
testing multiple functions with the same inputs, when it assumes that
the .inc file only has a single such line).

Tested for x86_64 and x86, and with build-many-glibcs.py.

7 files changed, 7 insertions, 4 deletions

diff --git a/sysdeps/ieee754/float128/Makefile b/sysdeps/ieee754/float128/Makefile
index f869e80f26..f0f6aae6ae 100644
--- a/sysdeps/ieee754/float128/Makefile
+++ b/sysdeps/ieee754/float128/Makefile
@@ -100,7 +100,7 @@ CFLAGS-s_llrintf128.c += -fno-builtin-llrintf64x
 CFLAGS-s_llroundf128.c += -fno-builtin-llroundf64x
 CFLAGS-e_logf128.c += -fno-builtin-logf64x
 CFLAGS-w_log10f128.c += -fno-builtin-log10f64x
-CFLAGS-w_log1pf128.c += -fno-builtin-log1pf64x
+CFLAGS-w_log1pf128.c += -fno-builtin-log1pf64x -fno-builtin-logp1f64x
 CFLAGS-e_log2f128.c += -fno-builtin-log2f64x
 CFLAGS-s_logbf128.c += -fno-builtin-logbf64x
 CFLAGS-s_lrintf128.c += -fno-builtin-lrintf64x
diff --git a/sysdeps/ieee754/float128/float128_private.h b/sysdeps/ieee754/float128/float128_private.h
index 38a8bdd0fe..19aa6c46f2 100644
--- a/sysdeps/ieee754/float128/float128_private.h
+++ b/sysdeps/ieee754/float128/float128_private.h
@@ -358,6 +358,7 @@
 #define llroundl llroundf128
 #define log1pl log1pf128
 #define logbl logbf128
+#define logp1l logp1f128
 #define logl logf128
 #define lrintl lrintf128
 #define lroundl lroundf128
diff --git a/sysdeps/ieee754/ldbl-128/Makefile b/sysdeps/ieee754/ldbl-128/Makefile
index 9cbfc7ff6e..1901238c5b 100644
--- a/sysdeps/ieee754/ldbl-128/Makefile
+++ b/sysdeps/ieee754/ldbl-128/Makefile
@@ -89,7 +89,7 @@ CFLAGS-s_llrintl.c += -fno-builtin-llrintf64x -fno-builtin-llrintf128
 CFLAGS-s_llroundl.c += -fno-builtin-llroundf64x -fno-builtin-llroundf128
 CFLAGS-e_logl.c += -fno-builtin-logf64x -fno-builtin-logf128
 CFLAGS-w_log10l.c += -fno-builtin-log10f64x -fno-builtin-log10f128
-CFLAGS-w_log1pl.c += -fno-builtin-log1pf64x -fno-builtin-log1pf128
+CFLAGS-w_log1pl.c += -fno-builtin-log1pf64x -fno-builtin-log1pf128 -fno-builtin-logp1f64x -fno-builtin-logp1f128
 CFLAGS-e_log2l.c += -fno-builtin-log2f64x -fno-builtin-log2f128
 CFLAGS-s_logbl.c += -fno-builtin-logbf64x -fno-builtin-logbf128
 CFLAGS-s_lrintl.c += -fno-builtin-lrintf64x -fno-builtin-lrintf128
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/Versions b/sysdeps/ieee754/ldbl-128ibm-compat/Versions
index c9a74366fd..018e0a8871 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/Versions
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/Versions
@@ -139,6 +139,7 @@ libm {
   }
   GLIBC_2.40 {
     __log2p1ieee128;
+    __logp1ieee128;
   }
 }
 libc {
diff --git a/sysdeps/ieee754/ldbl-96/Makefile b/sysdeps/ieee754/ldbl-96/Makefile
index 170e77b2f9..a3ec2c54ca 100644
--- a/sysdeps/ieee754/ldbl-96/Makefile
+++ b/sysdeps/ieee754/ldbl-96/Makefile
@@ -110,7 +110,7 @@ CFLAGS-s_llrintl.c += -fno-builtin-llrintf64x
 CFLAGS-s_llroundl.c += -fno-builtin-llroundf64x
 CFLAGS-e_logl.c += -fno-builtin-logf64x
 CFLAGS-w_log10l.c += -fno-builtin-log10f64x
-CFLAGS-w_log1pl.c += -fno-builtin-log1pf64x
+CFLAGS-w_log1pl.c += -fno-builtin-log1pf64x -fno-builtin-logp1f64x
 CFLAGS-e_log2l.c += -fno-builtin-log2f64x
 CFLAGS-s_logbl.c += -fno-builtin-logbf64x
 CFLAGS-s_lrintl.c += -fno-builtin-lrintf64x
diff --git a/sysdeps/ieee754/ldbl-opt/Makefile b/sysdeps/ieee754/ldbl-opt/Makefile
index d1eda5d022..9c204ff9b3 100644
--- a/sysdeps/ieee754/ldbl-opt/Makefile
+++ b/sysdeps/ieee754/ldbl-opt/Makefile
@@ -341,7 +341,7 @@ CFLAGS-nldbl-llrint.c = -fno-builtin-llrintl
 CFLAGS-nldbl-llround.c = -fno-builtin-llroundl
 CFLAGS-nldbl-log.c = -fno-builtin-logl
 CFLAGS-nldbl-log10.c = -fno-builtin-log10l
-CFLAGS-nldbl-log1p.c = -fno-builtin-log1pl
+CFLAGS-nldbl-log1p.c = -fno-builtin-log1pl -fno-builtin-logp1l
 CFLAGS-nldbl-log2.c = -fno-builtin-log2l
 CFLAGS-nldbl-log2p1.c = -fno-builtin-log2p1l
 CFLAGS-nldbl-logb.c = -fno-builtin-logbl
diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-log1p.c b/sysdeps/ieee754/ldbl-opt/nldbl-log1p.c
index 455b25a9f4..b0de985183 100644
--- a/sysdeps/ieee754/ldbl-opt/nldbl-log1p.c
+++ b/sysdeps/ieee754/ldbl-opt/nldbl-log1p.c
@@ -6,3 +6,4 @@ log1pl (double x)
 {
   return log1p (x);
 }
+weak_alias (log1pl, logp1l)