Re: [Arm-dev] Raspberry Pi 3 and Aarch64 image?

This program below compiles and executes successfully. It does not generate an "illegal instruction" like I thought would happen.

$ cat test.cc #include <arm_neon.h> int main(int argc, char* argv[]) { __asm__ __volatile__ ( ".code 32"

 // CRC using word
 ".byte 0x1a, 0xc1, 0x58, 0x00;\n"
 // CRC using half word
 ".byte 0x1a, 0xc1, 0x54, 0x00;\n"
 // CRC using byte
 ".byte 0x1a, 0xc1, 0x50, 0x00;\n"
 // PMULL
 ".byte 0x0e, 0xe1, 0xe0, 0x00;\n"
 // PMULL2
 ".byte 0x4e, 0xe1, 0xe0, 0x00;\n"
 // AES (aese)
 ".byte 0x4e, 0x28, 0x48, 0x20;\n"
 // AES (aesd)
 ".byte 0x4e, 0x28, 0x58, 0x20;\n"
 // SHA1 (sha1c)
 ".byte 0x5e, 0x02, 0x00, 0x20;\n"
 // SHA1 (sha1m)
 ".byte 0x5e, 0x02, 0x20, 0x20;\n"
 // SHA1 (sha1p)
 ".byte 0x5e, 0x02, 0x30, 0x20;\n"
 :
 :
 : "cc", "d0", "d1", "d2", "q0", "q1", "q2"
);

return 0; }

$ gcc -g3 -O0 -march=armv7-a -mfpu=neon test.cc -o test.exe $ ./test.exe $

All that silliness was not needed. All that was needed was:

gcc -march=armv8-a+crc -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 ...

I can't believe I could not piece that together from the man pages.... (Thanks to the GCC and SO folks).

Jeff