powerpc64le: Enable support for IEEE long double

On platforms where long double may have two different formats, i.e.: the
same format as double (64-bits) or something else (128-bits), building
with -mlong-double-128 is the default and function calls in the user
program match the name of the function in Glibc.  When building with
-mlong-double-64, Glibc installed headers redirect such calls to the
appropriate function.

Likewise, the internals of glibc are now built against IEEE long double.
However, the only (minimally) notable usage of long double is difftime.

Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>

3 files changed, 218 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/ldbl-128ibm-compat-abi.h b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/ldbl-128ibm-compat-abi.h
new file mode 100644
index 0000000000..34c7b6bed6
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/ldbl-128ibm-compat-abi.h
@@ -0,0 +1,8 @@
+/* ABI version for long double switch to IEEE 128-bit floating point..
+   This is used by the Versions and math_ldbl_opt.h files in
+   sysdeps/ieee754/ldbl-128ibm-compat/.  It gives the ABI version where
+   long double == ibm128 was replaced with long double == _Float128
+   for libm *l functions and libc functions using long double.  */
+
+#define LDBL_IBM128_VERSION		GLIBC_2.32
+#define LDBL_IBM128_COMPAT_VERSION	GLIBC_2_32
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
index 2b6a76d9c2..0c2513a4b3 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
@@ -2248,4 +2248,97 @@ GLIBC_2.30 getdents64 F
 GLIBC_2.30 gettid F
 GLIBC_2.30 tgkill F
 GLIBC_2.30 twalk_r F
+GLIBC_2.32 __argp_errorieee128 F
+GLIBC_2.32 __argp_failureieee128 F
+GLIBC_2.32 __asprintf_chkieee128 F
+GLIBC_2.32 __asprintfieee128 F
+GLIBC_2.32 __dprintf_chkieee128 F
+GLIBC_2.32 __dprintfieee128 F
+GLIBC_2.32 __errieee128 F
+GLIBC_2.32 __error_at_lineieee128 F
+GLIBC_2.32 __errorieee128 F
+GLIBC_2.32 __errxieee128 F
+GLIBC_2.32 __fprintf_chkieee128 F
+GLIBC_2.32 __fprintfieee128 F
+GLIBC_2.32 __fscanfieee128 F
+GLIBC_2.32 __fwprintf_chkieee128 F
+GLIBC_2.32 __fwprintfieee128 F
+GLIBC_2.32 __fwscanfieee128 F
+GLIBC_2.32 __isoc99_fscanfieee128 F
+GLIBC_2.32 __isoc99_fwscanfieee128 F
+GLIBC_2.32 __isoc99_scanfieee128 F
+GLIBC_2.32 __isoc99_sscanfieee128 F
+GLIBC_2.32 __isoc99_swscanfieee128 F
+GLIBC_2.32 __isoc99_vfscanfieee128 F
+GLIBC_2.32 __isoc99_vfwscanfieee128 F
+GLIBC_2.32 __isoc99_vscanfieee128 F
+GLIBC_2.32 __isoc99_vsscanfieee128 F
+GLIBC_2.32 __isoc99_vswscanfieee128 F
+GLIBC_2.32 __isoc99_vwscanfieee128 F
+GLIBC_2.32 __isoc99_wscanfieee128 F
+GLIBC_2.32 __obstack_printf_chkieee128 F
+GLIBC_2.32 __obstack_printfieee128 F
+GLIBC_2.32 __obstack_vprintf_chkieee128 F
+GLIBC_2.32 __obstack_vprintfieee128 F
+GLIBC_2.32 __printf_chkieee128 F
+GLIBC_2.32 __printf_sizeieee128 F
+GLIBC_2.32 __printfieee128 F
+GLIBC_2.32 __qecvtieee128 F
+GLIBC_2.32 __qecvtieee128_r F
+GLIBC_2.32 __qfcvtieee128 F
+GLIBC_2.32 __qfcvtieee128_r F
+GLIBC_2.32 __qgcvtieee128 F
+GLIBC_2.32 __scanfieee128 F
+GLIBC_2.32 __snprintf_chkieee128 F
+GLIBC_2.32 __snprintfieee128 F
+GLIBC_2.32 __sprintf_chkieee128 F
+GLIBC_2.32 __sprintfieee128 F
+GLIBC_2.32 __sscanfieee128 F
+GLIBC_2.32 __strfmon_lieee128 F
+GLIBC_2.32 __strfmonieee128 F
+GLIBC_2.32 __strfromieee128 F
+GLIBC_2.32 __strtoieee128 F
+GLIBC_2.32 __strtoieee128_l F
+GLIBC_2.32 __swprintf_chkieee128 F
+GLIBC_2.32 __swprintfieee128 F
+GLIBC_2.32 __swscanfieee128 F
+GLIBC_2.32 __syslog_chkieee128 F
+GLIBC_2.32 __syslogieee128 F
+GLIBC_2.32 __vasprintf_chkieee128 F
+GLIBC_2.32 __vasprintfieee128 F
+GLIBC_2.32 __vdprintf_chkieee128 F
+GLIBC_2.32 __vdprintfieee128 F
+GLIBC_2.32 __verrieee128 F
+GLIBC_2.32 __verrxieee128 F
+GLIBC_2.32 __vfprintf_chkieee128 F
+GLIBC_2.32 __vfprintfieee128 F
+GLIBC_2.32 __vfscanfieee128 F
+GLIBC_2.32 __vfwprintf_chkieee128 F
+GLIBC_2.32 __vfwprintfieee128 F
+GLIBC_2.32 __vfwscanfieee128 F
+GLIBC_2.32 __vprintf_chkieee128 F
+GLIBC_2.32 __vprintfieee128 F
+GLIBC_2.32 __vscanfieee128 F
+GLIBC_2.32 __vsnprintf_chkieee128 F
+GLIBC_2.32 __vsnprintfieee128 F
+GLIBC_2.32 __vsprintf_chkieee128 F
+GLIBC_2.32 __vsprintfieee128 F
+GLIBC_2.32 __vsscanfieee128 F
+GLIBC_2.32 __vswprintf_chkieee128 F
+GLIBC_2.32 __vswprintfieee128 F
+GLIBC_2.32 __vswscanfieee128 F
+GLIBC_2.32 __vsyslog_chkieee128 F
+GLIBC_2.32 __vsyslogieee128 F
+GLIBC_2.32 __vwarnieee128 F
+GLIBC_2.32 __vwarnxieee128 F
+GLIBC_2.32 __vwprintf_chkieee128 F
+GLIBC_2.32 __vwprintfieee128 F
+GLIBC_2.32 __vwscanfieee128 F
+GLIBC_2.32 __warnieee128 F
+GLIBC_2.32 __warnxieee128 F
+GLIBC_2.32 __wcstoieee128 F
+GLIBC_2.32 __wcstoieee128_l F
+GLIBC_2.32 __wprintf_chkieee128 F
+GLIBC_2.32 __wprintfieee128 F
+GLIBC_2.32 __wscanfieee128 F
 GLIBC_2.32 pthread_sigmask F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libm.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libm.abilist
index d479a64fca..aa45e2639c 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libm.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libm.abilist
@@ -1097,3 +1097,120 @@ GLIBC_2.31 totalordermagf32x F
 GLIBC_2.31 totalordermagf64 F
 GLIBC_2.31 totalordermagf64x F
 GLIBC_2.31 totalordermagl F
+GLIBC_2.32 __acoshieee128 F
+GLIBC_2.32 __acosieee128 F
+GLIBC_2.32 __asinhieee128 F
+GLIBC_2.32 __asinieee128 F
+GLIBC_2.32 __atan2ieee128 F
+GLIBC_2.32 __atanhieee128 F
+GLIBC_2.32 __atanieee128 F
+GLIBC_2.32 __cabsieee128 F
+GLIBC_2.32 __cacoshieee128 F
+GLIBC_2.32 __cacosieee128 F
+GLIBC_2.32 __canonicalizeieee128 F
+GLIBC_2.32 __cargieee128 F
+GLIBC_2.32 __casinhieee128 F
+GLIBC_2.32 __casinieee128 F
+GLIBC_2.32 __catanhieee128 F
+GLIBC_2.32 __catanieee128 F
+GLIBC_2.32 __cbrtieee128 F
+GLIBC_2.32 __ccoshieee128 F
+GLIBC_2.32 __ccosieee128 F
+GLIBC_2.32 __ceilieee128 F
+GLIBC_2.32 __cexpieee128 F
+GLIBC_2.32 __cimagieee128 F
+GLIBC_2.32 __clog10ieee128 F
+GLIBC_2.32 __clogieee128 F
+GLIBC_2.32 __conjieee128 F
+GLIBC_2.32 __copysignieee128 F
+GLIBC_2.32 __coshieee128 F
+GLIBC_2.32 __cosieee128 F
+GLIBC_2.32 __cpowieee128 F
+GLIBC_2.32 __cprojieee128 F
+GLIBC_2.32 __crealieee128 F
+GLIBC_2.32 __csinhieee128 F
+GLIBC_2.32 __csinieee128 F
+GLIBC_2.32 __csqrtieee128 F
+GLIBC_2.32 __ctanhieee128 F
+GLIBC_2.32 __ctanieee128 F
+GLIBC_2.32 __erfcieee128 F
+GLIBC_2.32 __erfieee128 F
+GLIBC_2.32 __exp10ieee128 F
+GLIBC_2.32 __exp2ieee128 F
+GLIBC_2.32 __expieee128 F
+GLIBC_2.32 __expm1ieee128 F
+GLIBC_2.32 __f32addieee128 F
+GLIBC_2.32 __f32divieee128 F
+GLIBC_2.32 __f32mulieee128 F
+GLIBC_2.32 __f32subieee128 F
+GLIBC_2.32 __f64addieee128 F
+GLIBC_2.32 __f64divieee128 F
+GLIBC_2.32 __f64mulieee128 F
+GLIBC_2.32 __f64subieee128 F
+GLIBC_2.32 __fabsieee128 F
+GLIBC_2.32 __fdimieee128 F
+GLIBC_2.32 __floorieee128 F
+GLIBC_2.32 __fmaieee128 F
+GLIBC_2.32 __fmaxieee128 F
+GLIBC_2.32 __fmaxmagieee128 F
+GLIBC_2.32 __fminieee128 F
+GLIBC_2.32 __fminmagieee128 F
+GLIBC_2.32 __fmodieee128 F
+GLIBC_2.32 __frexpieee128 F
+GLIBC_2.32 __fromfpieee128 F
+GLIBC_2.32 __fromfpxieee128 F
+GLIBC_2.32 __getpayloadieee128 F
+GLIBC_2.32 __hypotieee128 F
+GLIBC_2.32 __ilogbieee128 F
+GLIBC_2.32 __j0ieee128 F
+GLIBC_2.32 __j1ieee128 F
+GLIBC_2.32 __jnieee128 F
+GLIBC_2.32 __ldexpieee128 F
+GLIBC_2.32 __lgammaieee128 F
+GLIBC_2.32 __lgammaieee128_r F
+GLIBC_2.32 __llogbieee128 F
+GLIBC_2.32 __llrintieee128 F
+GLIBC_2.32 __llroundieee128 F
+GLIBC_2.32 __log10ieee128 F
+GLIBC_2.32 __log1pieee128 F
+GLIBC_2.32 __log2ieee128 F
+GLIBC_2.32 __logbieee128 F
+GLIBC_2.32 __logieee128 F
+GLIBC_2.32 __lrintieee128 F
+GLIBC_2.32 __lroundieee128 F
+GLIBC_2.32 __modfieee128 F
+GLIBC_2.32 __nanieee128 F
+GLIBC_2.32 __nearbyintieee128 F
+GLIBC_2.32 __nextafterieee128 F
+GLIBC_2.32 __nextdownieee128 F
+GLIBC_2.32 __nexttoward_to_ieee128 F
+GLIBC_2.32 __nexttowardf_to_ieee128 F
+GLIBC_2.32 __nexttowardieee128 F
+GLIBC_2.32 __nextupieee128 F
+GLIBC_2.32 __powieee128 F
+GLIBC_2.32 __remainderieee128 F
+GLIBC_2.32 __remquoieee128 F
+GLIBC_2.32 __rintieee128 F
+GLIBC_2.32 __roundevenieee128 F
+GLIBC_2.32 __roundieee128 F
+GLIBC_2.32 __scalbieee128 F
+GLIBC_2.32 __scalblnieee128 F
+GLIBC_2.32 __scalbnieee128 F
+GLIBC_2.32 __setpayloadieee128 F
+GLIBC_2.32 __setpayloadsigieee128 F
+GLIBC_2.32 __significandieee128 F
+GLIBC_2.32 __sincosieee128 F
+GLIBC_2.32 __sinhieee128 F
+GLIBC_2.32 __sinieee128 F
+GLIBC_2.32 __sqrtieee128 F
+GLIBC_2.32 __tanhieee128 F
+GLIBC_2.32 __tanieee128 F
+GLIBC_2.32 __tgammaieee128 F
+GLIBC_2.32 __totalorderieee128 F
+GLIBC_2.32 __totalordermagieee128 F
+GLIBC_2.32 __truncieee128 F
+GLIBC_2.32 __ufromfpieee128 F
+GLIBC_2.32 __ufromfpxieee128 F
+GLIBC_2.32 __y0ieee128 F
+GLIBC_2.32 __y1ieee128 F
+GLIBC_2.32 __ynieee128 F