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| author | Stefan Liebler <stli@linux.ibm.com> | 2021-03-23 17:29:26 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2021-03-26 10:51:31 +0100 |
| commit | 7759be2593b689cb1eafc0f52ee7f59c639e5d2f (patch) | |
| tree | 9fe921acd60d3020da8dc14c6ed335ef6e92ae3d /sysdeps/s390/configure.ac | |
| parent | 1966f47a1e54f962a355a5f6a6b730c9848ab956 (diff) | |
| download | glibc-7759be2593b689cb1eafc0f52ee7f59c639e5d2f.tar.gz glibc-7759be2593b689cb1eafc0f52ee7f59c639e5d2f.tar.xz glibc-7759be2593b689cb1eafc0f52ee7f59c639e5d2f.zip | |
S390: Also check vector support in memmove ifunc-selector [BZ #27511]
The arch13 memmove variant is currently selected by the ifunc selector if the Miscellaneous-Instruction-Extensions Facility 3 facility bit is present, but the function is also using vector instructions. If the vector support is not present, one is receiving an operation exception. Therefore this patch also checks for vector support in the ifunc selector and in ifunc-impl-list.c. Just to be sure, the configure check is now also testing an arch13 vector instruction and an arch13 Miscellaneous-Instruction-Extensions Facility 3 instruction.
Diffstat (limited to 'sysdeps/s390/configure.ac')
| -rw-r--r-- | sysdeps/s390/configure.ac | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sysdeps/s390/configure.ac b/sysdeps/s390/configure.ac index dfe007a774..e6df624919 100644 --- a/sysdeps/s390/configure.ac +++ b/sysdeps/s390/configure.ac @@ -88,7 +88,9 @@ void testinsn (char *buf) __asm__ (".machine \"arch13\" \n\t" ".machinemode \"zarch_nohighgprs\" \n\t" "lghi %%r0,16 \n\t" - "mvcrl 0(%0),32(%0)" : : "a" (buf) : "memory", "r0"); + "mvcrl 0(%0),32(%0) \n\t" + "vstrs %%v20,%%v20,%%v20,%%v20,0,2" + : : "a" (buf) : "memory", "r0"); } EOF dnl test, if assembler supports S390 arch13 instructions @@ -195,7 +197,9 @@ cat > conftest.c <<\EOF void testinsn (char *buf) { __asm__ ("lghi %%r0,16 \n\t" - "mvcrl 0(%0),32(%0)" : : "a" (buf) : "memory", "r0"); + "mvcrl 0(%0),32(%0) \n\t" + "vstrs %%v20,%%v20,%%v20,%%v20,0,2" + : : "a" (buf) : "memory", "r0"); } EOF dnl test, if assembler supports S390 arch13 zarch instructions as default |