
64-bit PowerPC G5 processor now fully supported using Intel GCC Compiler

Use a header file like 

#define MR_BIG_ENDIAN
#define MIRACL 64
#define mr_utype long
#define MR_IBITS 32
#define MR_LBITS 64
#define mr_unsign32 unsigned int
#define mr_unsign64 unsigned long
#define MR_ALWAYS_BINARY
#define MAXBASE ((mr_small)1<<(MIRACL-1))
#define MR_BITSINCHAR 8

and use assembly language file mrmuldv.ppc renamed to mrmuldv.c
Or extract it from mrmuldv.any

To build the miracl library, extract below into a file "powerpc" and execute

bash powerpc

-------------------------------

rm miracl.a
gcc  -m64 -c -O2 mrcore.c
gcc  -m64 -c -O2 mrarth0.c
gcc  -m64 -c -O2 mrarth1.c
gcc  -m64 -c -O2 mrarth2.c
gcc  -m64 -c -O2 mralloc.c
gcc  -m64 -c -O2 mrsmall.c
gcc  -m64 -c -O2 mrio1.c
gcc  -m64 -c -O2 mrio2.c
gcc  -m64 -c -O2 mrgcd.c
gcc  -m64 -c -O2 mrjack.c
gcc  -m64 -c -O2 mrxgcd.c
gcc  -m64 -c -O2 mrarth3.c
gcc  -m64 -c -O2 mrrand.c
gcc  -m64 -c -O2 mrprime.c
gcc  -m64 -c -O2 mrcrt.c
gcc  -m64 -c -O2 mrscrt.c
gcc  -m64 -c -O2 mrmonty.c
gcc  -m64 -c -O2 mrpower.c
gcc  -m64 -c -O2 mrcurve.c
gcc  -m64 -c -O2 mrfast.c
gcc  -m64 -c -O2 mrshs.c
gcc  -m64 -c -O2 mrshs256.c
gcc  -m64 -c -O2 mrshs512.c
gcc  -m64 -c -O2 mraes.c
gcc  -m64 -c -O2 mrlucas.c
gcc  -m64 -c -O2 mrstrong.c
gcc  -m64 -c -O2 mrbrick.c
gcc  -m64 -c -O2 mrebrick.c
gcc  -m64 -c -O2 mrecgf2m.c
gcc  -m64 -c -O2 mrmuldv.c
ar rc miracl.a mrcore.o mrarth0.o mrarth1.o mrarth2.o mralloc.o mrsmall.o
ar r miracl.a mrio1.o mrio2.o mrjack.o mrgcd.o mrxgcd.o mrarth3.o
ar r miracl.a mrrand.o mrprime.o mrcrt.o mrscrt.o mrmonty.o mrcurve.o
ar r miracl.a mrpower.o mrfast.o mrshs.o mrshs256.o mraes.o mrlucas.o mrstrong.o       
ar r miracl.a mrbrick.o mrebrick.o mrecgf2m.o mrshs512.o mrmuldv.o
gcc -I. -O2 -m64 brent.c miracl.a -o brent
rm mr*.o

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There is also a macro file powerpc.mcs  - see kcmcomba.txt and makemcs.txt

