PowerPC: Use __builtin_pack_ieee128 if long double is IEEE 128-bit.
This patch changes the __ibm128 emulator to use __builtin_pack_ieee128
instead of __builtin_pack_longdouble if long double is IEEE 128-bit, and
we need to use the __ibm128 type.
libgcc/
2020-09-23 Michael Meissner <meiss...@linux.ibm.com>
* config/rs6000/ibm-ldouble.c (pack_ldouble): Use
__builtin_pack_ieee128 if long double is IEEE 128-bit.
---
libgcc/config/rs6000/ibm-ldouble.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/libgcc/config/rs6000/ibm-ldouble.c
b/libgcc/config/rs6000/ibm-ldouble.c
index dd2a02373f2..767fdd72683 100644
--- a/libgcc/config/rs6000/ibm-ldouble.c
+++ b/libgcc/config/rs6000/ibm-ldouble.c
@@ -102,9 +102,17 @@ __asm__ (".symver __gcc_qadd,_xlqadd@GCC_3.4\n\t"
static inline IBM128_TYPE
pack_ldouble (double dh, double dl)
{
+ /* If we are building on a non-VSX system, the __ibm128 type is not defined.
+ This means we can't always use __builtin_pack_ibm128. Instead, we use
+ __builtin_pack_longdouble if long double uses the IBM extended double
+ 128-bit format, and use the explicit __builtin_pack_ibm128 if long double
+ is IEEE 128-bit. */
#if defined (__LONG_DOUBLE_128__) && defined (__LONG_DOUBLE_IBM128__) \
&& !(defined (_SOFT_FLOAT) || defined (__NO_FPRS__))
return __builtin_pack_longdouble (dh, dl);
+#elif defined (__LONG_DOUBLE_128__) && defined (__LONG_DOUBLE_IEEE128__) \
+ && !(defined (_SOFT_FLOAT) || defined (__NO_FPRS__))
+ return __builtin_pack_ibm128 (dh, dl);
#else
union
{
--
2.22.0
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.ibm.com, phone: +1 (978) 899-4797
