From 52a810b4d8a725a7edb2988f6c3813a9938362a5 Mon Sep 17 00:00:00 2001
From: eastb233 <xiezhiheng@huawei.com>
Date: Fri, 14 Jul 2023 11:10:24 +0800
Subject: [PATCH 04/22] [libquadmath] Enable libquadmath on kunpeng

This enable libquadmath on kunpeng platform to convenient
users that migrating from x86 platform. libquadmath uses "__float128"
as quad precision floating point type and with math functions with "q"
suffix like "cosq". For those who do not need to adapt to x86 platform,
you can use "long double" as quad precision floating point type and math
functions with "l" suffix like "cosl" in libm for quad precision math.
---
 libquadmath/Makefile.am  |  4 ++++
 libquadmath/Makefile.in  |  3 ++-
 libquadmath/configure    | 28 ++++++++++++++++++++++++++--
 libquadmath/configure.ac |  7 +++++++
 libquadmath/quadmath.h   | 13 +++++++++++--
 5 files changed, 50 insertions(+), 5 deletions(-)

diff --git a/libquadmath/Makefile.am b/libquadmath/Makefile.am
index 35dffb46f..bf0398d9c 100644
--- a/libquadmath/Makefile.am
+++ b/libquadmath/Makefile.am
@@ -2,6 +2,10 @@
 
 AUTOMAKE_OPTIONS = foreign info-in-builddir
 
+if ARCH_AARCH64
+DEFS += -D__float128="long double"
+endif
+
 ## Skip over everything if the quadlib is not available:
 if BUILD_LIBQUADMATH
 ACLOCAL_AMFLAGS = -I .. -I ../config
diff --git a/libquadmath/Makefile.in b/libquadmath/Makefile.in
index 8c0112122..449cc8a06 100644
--- a/libquadmath/Makefile.in
+++ b/libquadmath/Makefile.in
@@ -90,6 +90,7 @@ POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
 target_triplet = @target@
+@ARCH_AARCH64_TRUE@am__append_1 = -D__float128="long double"
 @BUILD_LIBQUADMATH_FALSE@libquadmath_la_DEPENDENCIES =
 subdir = .
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
@@ -337,7 +338,7 @@ CFLAGS = @CFLAGS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
-DEFS = @DEFS@
+DEFS = @DEFS@ $(am__append_1)
 DEPDIR = @DEPDIR@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
diff --git a/libquadmath/configure b/libquadmath/configure
index 603f2f131..13a9088fb 100755
--- a/libquadmath/configure
+++ b/libquadmath/configure
@@ -633,6 +633,8 @@ am__EXEEXT_TRUE
 LTLIBOBJS
 LIBOBJS
 get_gcc_base_ver
+ARCH_AARCH64_FALSE
+ARCH_AARCH64_TRUE
 GENINSRC_FALSE
 GENINSRC_TRUE
 XCFLAGS
@@ -10806,7 +10808,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10809 "configure"
+#line 10811 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10912,7 +10914,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10915 "configure"
+#line 10917 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12705,6 +12707,11 @@ else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+    #if defined(__aarch64__)
+    typedef long double __float128;
+    #define __builtin_huge_valq() (__extension__ 0x1.0p32767Q)
+    #endif
+
     #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
     typedef _Complex float __attribute__((mode(TC))) __complex128;
     #else
@@ -12756,6 +12763,11 @@ fi
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+    #if defined(__aarch64__)
+    typedef long double __float128;
+    #define __builtin_huge_valq() (__extension__ 0x1.0p32767Q)
+    #endif
+
     #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
     typedef _Complex float __attribute__((mode(TC))) __complex128;
     #else
@@ -13242,6 +13254,14 @@ else
   GENINSRC_FALSE=
 fi
 
+ if expr "$target_cpu" : "aarch64.*" > /dev/null; then
+  ARCH_AARCH64_TRUE=
+  ARCH_AARCH64_FALSE='#'
+else
+  ARCH_AARCH64_TRUE='#'
+  ARCH_AARCH64_FALSE=
+fi
+
 
 # Determine what GCC version number to use in filesystem paths.
 
@@ -13425,6 +13445,10 @@ if test -z "${GENINSRC_TRUE}" && test -z "${GENINSRC_FALSE}"; then
   as_fn_error $? "conditional \"GENINSRC\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${ARCH_AARCH64_TRUE}" && test -z "${ARCH_AARCH64_FALSE}"; then
+  as_fn_error $? "conditional \"ARCH_AARCH64\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 
 : "${CONFIG_STATUS=./config.status}"
 ac_write_fail=0
diff --git a/libquadmath/configure.ac b/libquadmath/configure.ac
index eec4084a4..507c247d6 100644
--- a/libquadmath/configure.ac
+++ b/libquadmath/configure.ac
@@ -218,6 +218,11 @@ AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun])
 
 AC_CACHE_CHECK([whether __float128 is supported], [libquad_cv_have_float128],
   [GCC_TRY_COMPILE_OR_LINK([
+    #if defined(__aarch64__)
+    typedef long double __float128;
+    #define __builtin_huge_valq() (__extension__ 0x1.0p32767Q)
+    #endif
+
     #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
     typedef _Complex float __attribute__((mode(TC))) __complex128;
     #else
@@ -393,6 +398,8 @@ AS_HELP_STRING([--enable-generated-files-in-srcdir],
 [enable_generated_files_in_srcdir=no])
 AC_MSG_RESULT($enable_generated_files_in_srcdir)
 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
+AM_CONDITIONAL(ARCH_AARCH64,
+               [expr "$target_cpu" : "aarch64.*" > /dev/null])
 
 # Determine what GCC version number to use in filesystem paths.
 GCC_BASE_VER
diff --git a/libquadmath/quadmath.h b/libquadmath/quadmath.h
index 81eb957d2..bb1b49df6 100644
--- a/libquadmath/quadmath.h
+++ b/libquadmath/quadmath.h
@@ -27,6 +27,12 @@ Boston, MA 02110-1301, USA.  */
 extern "C" {
 #endif
 
+#if defined(__aarch64__)
+#ifndef __float128
+typedef long double __float128;
+#endif
+#endif
+
 /* Define the complex type corresponding to __float128
    ("_Complex __float128" is not allowed) */
 #if (!defined(_ARCH_PPC)) || defined(__LONG_DOUBLE_IEEE128__)
@@ -160,10 +166,13 @@ extern int quadmath_snprintf (char *str, size_t size,
 #define FLT128_MAX_10_EXP 4932
 
 
-#define HUGE_VALQ __builtin_huge_valq()
+#if defined(__aarch64__)
 /* The following alternative is valid, but brings the warning:
    (floating constant exceeds range of ‘__float128’)  */
-/* #define HUGE_VALQ (__extension__ 0x1.0p32767Q) */
+# define HUGE_VALQ (__extension__ 0x1.0p32767Q)
+#else
+# define HUGE_VALQ __builtin_huge_valq()
+#endif
 
 #define M_Eq		2.718281828459045235360287471352662498Q  /* e */
 #define M_LOG2Eq	1.442695040888963407359924681001892137Q  /* log_2 e */
-- 
2.33.0