[PATCH] powerpc: Fix unrecognized instruction errors with recent GCC

["Paul A. Clarke via Libc-alpha" <libc-alpha@sourceware.org>]

Recent versions of GCC stopped passing "-many" to the assembler,
so some instructions which were under older, more stringent
"machine" directives no longer compile with unrecognized instructions
in that context.

In tst-ucontext-ppc64-vscr.c, while the instructions provoking the new
error messages are bracketed by ".machine power5", which is ostensibly
Power ISA 2.03 (POWER5), the POWER5 processor did not support the
VSX subset, so these instructions are not recognized as "power5".

Error: unrecognized opcode: `vspltisb'
Error: unrecognized opcode: `vpkuwus'
Error: unrecognized opcode: `mfvscr'
Error: unrecognized opcode: `stvx'

Manually adding the VSX subset via ".machine altivec" is sufficient.
---
 sysdeps/powerpc/powerpc64/tst-ucontext-ppc64-vscr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sysdeps/powerpc/powerpc64/tst-ucontext-ppc64-vscr.c b/sysdeps/powerpc/powerpc64/tst-ucontext-ppc64-vscr.c
index 28c87fcef72b..d3fc4ab589f4 100644
--- a/sysdeps/powerpc/powerpc64/tst-ucontext-ppc64-vscr.c
+++ b/sysdeps/powerpc/powerpc64/tst-ucontext-ppc64-vscr.c
@@ -50,6 +50,7 @@ do_test (void)
   /* Set SAT bit in VSCR register.  */
   asm volatile (".machine push;\n"
 		".machine \"power5\";\n"
+		".machine altivec;\n"
 		"vspltisb %0,0;\n"
 		"vspltisb %1,-1;\n"
 		"vpkuwus %0,%0,%1;\n"
-- 
2.27.0