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From: Julian Seward (julian_at_[hidden])
Date: 2006-03-12 07:24:32

r9191 (approximately Fri 3 March 06) does not build on ppc32-linux
due to use of register names of the form "r9" etc in
opal/include/opal/sys/powerpc/atomic.h, in opal_atomic_cmpset_64().
You must use either names of the form "%%r9" or just plain "9",
or give gcc the flag -mregnames (iirc). The plain-digit convention
is what the rest of the assembly fragments in that file use.
My inelegant fix is below.

This is with SuSE 10.0 running on a Mac Mini. (glibc 2.3.5, gcc 4.0.2)

Config args were --with-memory-manager=none --disable-mpi-f77


Index: opal/include/opal/sys/powerpc/atomic.h
--- opal/include/opal/sys/powerpc/atomic.h (revision 9191)
+++ opal/include/opal/sys/powerpc/atomic.h (working copy)
@@ -259,17 +259,17 @@
      * is very similar to the pure 64 bit version.
    __asm__ __volatile__ (
- "ld r4,%2 \n\t"
- "ld r5,%3 \n\t"
- "1: ldarx r9, 0, %1 \n\t"
- " cmpd 0, r9, r4 \n\t"
+ "ld %%r4,%2 \n\t"
+ "ld %%r5,%3 \n\t"
+ "1: ldarx %%r9, 0, %1 \n\t"
+ " cmpd 0, %%r9, %%r4 \n\t"
                          " bne- 2f \n\t"
- " stdcx. r5, 0, %1 \n\t"
+ " stdcx. %%r5, 0, %1 \n\t"
                          " bne- 1b \n\t"
                          "2: \n\t"
- "xor r5,r4,r9 \n\t"
- "subfic r9,r5,0 \n\t"
- "adde %0,r9,r5 \n\t"
+ "xor %%r5,%%r4,%%r9 \n\t"
+ "subfic %%r9,%%r5,0 \n\t"
+ "adde %0,%%r9,%%r5 \n\t"
                          : "=&r" (ret)
                          : "r"(addr),
                            "m"(oldval), "m"(newval)