smult_curve25519_donna_c64 Doesn't build on RHEL5 (gcc-Version 4.1.2 20080704 (Red Hat 4.1.2-54))

[Asmod4n]

This is with 0.4.2
only used ./configure && make and got this result.

  CC       libsodium_la-smult_curve25519_donna_c64.lo
crypto_scalarmult/curve25519/donna_c64/smult_curve25519_donna_c64.c: In function 'crypto_scalarmult_curve25519':
crypto_scalarmult/curve25519/donna_c64/smult_curve25519_donna_c64.c:424: error: unrecognizable insn:
(insn 9952 6932 9953 20 crypto_scalarmult/curve25519/donna_c64/smult_curve25519_donna_c64.c:236 (parallel [
            (set (reg:CC 17 flags)
                (unspec:CC [
                        (reg:DI 39 r10 [orig:375 t$0.844 ] [375])
                        (const_int 2251799813685229 [0x7ffffffffffed])
                    ] 24))
            (set (reg:DI 39 r10 [orig:375 t$0.844 ] [375])
                (plus:DI (reg:DI 39 r10 [orig:375 t$0.844 ] [375])
                    (const_int 2251799813685229 [0x7ffffffffffed])))
        ]) -1 (nil)
    (nil))
crypto_scalarmult/curve25519/donna_c64/smult_curve25519_donna_c64.c:424: internal compiler error: in extract_insn, at recog.c:2084

[jedisct1]

Is that on i386 or amd64?

[jedisct1]

I assume this is amd64.
Can you try lowering the optimization level?

env CFLAGS='-O' ./configure && make

[Asmod4n]

Yes its on x86_64, still crashes, but with a shorter error

>   CC     libsodium_la-smult_curve25519_donna_c64.lo
> crypto_scalarmult/curve25519/donna_c64/smult_curve25519_donna_c64.c: In function ‘crypto_scalarmult_curve25519’:
> crypto_scalarmult/curve25519/donna_c64/smult_curve25519_donna_c64.c:424: error: unrecognizable insn:
> (insn 10460 6929 10461 20 (parallel [
>             (set (reg:CC 17 flags)
>                 (unspec:CC [
>                         (reg:DI 4 si [orig:377 t$0.750 ] [377])
>                         (const_int 2251799813685229 [0x7ffffffffffed])
>                     ] 24))
>             (set (reg:DI 4 si [orig:376 t$0.751 ] [376])
>                 (plus:DI (reg:DI 4 si [orig:377 t$0.750 ] [377])
>                     (const_int 2251799813685229 [0x7ffffffffffed])))
>         ]) -1 (nil)
>     (nil))

On 06.09.2013, at 04:04, Frank Denis notifications@github.com wrote:

I assume this is amd64.
Can you try lowering the optimization level?

env CFLAGS='-O' ./configure && make

—
Reply to this email directly or view it on GitHub.

[jedisct1]

How about -O0 ?

[Asmod4n]

Compiled \o/

thanks for the Help

On 06.09.2013, at 05:28, Hendrik Beskow hendrik@beskow.de wrote:

Yes its on x86_64, still crashes, but with a shorter error

>  CC     libsodium_la-smult_curve25519_donna_c64.lo
> crypto_scalarmult/curve25519/donna_c64/smult_curve25519_donna_c64.c: In function ‘crypto_scalarmult_curve25519’:
> crypto_scalarmult/curve25519/donna_c64/smult_curve25519_donna_c64.c:424: error: unrecognizable insn:
> (insn 10460 6929 10461 20 (parallel [
>            (set (reg:CC 17 flags)
>                (unspec:CC [
>                        (reg:DI 4 si [orig:377 t$0.750 ] [377])
>                        (const_int 2251799813685229 [0x7ffffffffffed])
>                    ] 24))
>            (set (reg:DI 4 si [orig:376 t$0.751 ] [376])
>                (plus:DI (reg:DI 4 si [orig:377 t$0.750 ] [377])
>                    (const_int 2251799813685229 [0x7ffffffffffed])))
>        ]) -1 (nil)
>    (nil))

On 06.09.2013, at 04:04, Frank Denis notifications@github.com wrote:

I assume this is amd64.
Can you try lowering the optimization level?

env CFLAGS='-O' ./configure && make

—
Reply to this email directly or view it on GitHub.

[jedisct1]

So, that's a nasty compiler bug. gcc 4.1.2 is dead old (it was released in February 2007) and this bug has been fixed since, but I'll try to add some code to detect and work around this.
Thanks for your report!

[jedisct1]

Ok, this has been done in 7544cba
Thanks!