https://gcc.gnu.org/g:1461a33efbfbdff7fe805581db5bf1bc9f3e00f2
commit 1461a33efbfbdff7fe805581db5bf1bc9f3e00f2
Author: Michael Meissner <meiss...@linux.ibm.com>
Date: Tue Jul 16 12:07:26 2024 -0400
Update ChangeLog.*
Diff:
---
gcc/ChangeLog.bugs | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 88 insertions(+)
diff --git a/gcc/ChangeLog.bugs b/gcc/ChangeLog.bugs
index e2530576840c..1c112f0c0ed6 100644
--- a/gcc/ChangeLog.bugs
+++ b/gcc/ChangeLog.bugs
@@ -1,3 +1,91 @@
+==================== Branch work171-bugs, patch #331 ====================
+
+Do not add -mvsx when testing the float128 support.
+
+In the past, we would add -mvsx when building the float128 support in libgcc.
+This allowed us to build the float128 support on a big endian system where the
+default cpu is power4. While the libgcc support can be built, given there is
no
+glibc support for float128 available.
+
+However, adding -mvsx and building the libgcc float128 support causes problems
+if you set the default cpu to something like a 7540, which does not have VSX
+support. The assembler complains that when the code does a ".machine 7450",
you
+cannot use VSX instructions.
+
+This patch changes the GCC tests so that it will only do the IEEE 128-bit tests
+if the default compiler enables the VSX instruction set by default. Otherwise
+all of the float128 tests will fail because the libgcc support is not
available.
+
+2024-07-16 Michael Meissner <meiss...@linux.ibm.com>
+
+gcc/testsuite/
+
+ PR target/115800
+ PR target/113652
+ * gcc.target/powerpc/abs128-1.c: Remove -mvsx option. Add explicit
+ check for the float128 support.
+ * gcc.target/powerpc/bfp/scalar-insert-exp-16.c: Likewise.
+ * gcc.target/powerpc/copysign128-1.c: Likewise.
+ * gcc.target/powerpc/divkc3-1.c: Likewise.
+ * gcc.target/powerpc/float128-3.c: Likewise.
+ * gcc.target/powerpc/float128-5.c: Likewise.
+ * gcc.target/powerpc/float128-complex-2.: Likewise.
+ * gcc.target/powerpc/float128-math.: Likewise.
+ * gcc.target/powerpc/inf128-1.: Likewise.
+ * gcc.target/powerpc/mulkc3-1.c: Likewise.
+ * gcc.target/powerpc/nan128-1.c: Likewise.
+ * gcc.target/powerpc/p9-lxvx-stxvx-3.: Likewise.
+ * gcc.target/powerpc/pr104253.: Likewise.
+ * gcc.target/powerpc/pr70669.c: Likewise.
+ * gcc.target/powerpc/pr79004.c: Likewise.
+ * gcc.target/powerpc/pr79038-1.c: Likewise.
+ * gcc.target/powerpc/pr81959.c: Likewise.
+ * gcc.target/powerpc/pr85657-1.: Likewise.
+ * gcc.target/powerpc/pr85657-2.c: Likewise.
+ * gcc.target/powerpc/pr99708.: Likewise.
+ * gcc.target/powerpc/signbit-1.c: Likewise.
+ * gcc.target/powerpc/signbit-2.c: Likewise.
+ * lib/target-supports.exp (check_ppc_float128_sw_available): Likewise.
+ (check_ppc_float128_hw_available): Likewise.
+ (add_options_for___float128): Likewise.
+ (check_effective_target___float128): Likewise.
+ (check_effective_target_base_quadfloat_support): Likewise.
+
+==================== Branch work171-bugs, patch #330 ====================
+
+Do not add -mvsx when building libgcc float128 support.
+
+In the past, we would add -mvsx when building the float128 support in libgcc.
+This allowed us to build the float128 support on a big endian system where the
+default cpu is power4. While the libgcc support can be built, given there is
no
+glibc support for float128 available.
+
+However, adding -mvsx and building the libgcc float128 support causes problems
+if you set the default cpu to something like a 7540, which does not have VSX
+support. The assembler complains that when the code does a ".machine 7450",
you
+cannot use VSX instructions.
+
+With these patches, the float128 libgcc support is only built if the default
+compiler has VSX support. If somebody wanted to enable the glibc support for
+big endian, they would need to set the base cpu to power8 to enable building
the
+libgcc float128 libraries.
+
+2024-07-16 Michael Meissner <meiss...@linux.ibm.com>
+
+libgcc/
+
+ PR target/115800
+ PR target/113652
+ * config.host (powerpc*-*-linux*): Do not add t-float128-hw or
+ t-float128-p10-hw if the default compiler does not support float128.
+ * config/rs6000/t-float128 (FP128_CFLAGS_SW): Do not add -mvsx when
+ building the basic float128 support.
+ * config/rs6000/t-float128-hw (FP128_CFLAGS_HW): Likewise.
+ * config/rs6000/t-float128-p10-hw (FP128_3_1_CFLAGS_HW): Likewise.
+ * configure.ac (powerpc*-*-linux*): Do not add -mvsx when testing
+ whether to build the float128 support.
+ * configure: Regenerate.
+
==================== Branch work171-bugs, patch #325 was reverted
====================
==================== Branch work171-bugs, patch #324 was reverted
====================
==================== Branch work171-bugs, patch #323 was reverted
====================
