On 02/12/2014 01:23 PM, Tom Musta wrote:
> +#define PMSUM(name, srcfld, trgfld, trgtyp) \
> +void helper_##name(ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b) \
> +{ \
> + int i, j; \
> + trgtyp prod[sizeof(ppc_avr_t)/sizeof(a->srcfld[0])]; \
> + \
> + VECTOR_FOR_INORDER_I(i, srcfld) { \
> + prod[i] = 0; \
> + for (j = 0; j < sizeof(a->srcfld[0]) * 8; j++) { \
> + if (a->srcfld[i] & (1ull<<j)) { \
> + prod[i] ^= ((trgtyp)b->srcfld[i] << j); \
> + } \
> + } \
> + } \
> + \
> + VECTOR_FOR_INORDER_I(i, trgfld) { \
> + r->trgfld[i] = prod[2*i] ^ prod[2*i+1]; \
> + } \
> +}
> +
> +PMSUM(vpmsumb, u8, u16, uint16_t)
> +PMSUM(vpmsumh, u16, u32, uint32_t)
> +PMSUM(vpmsumw, u32, u64, uint64_t)
Given that we've now got three targets actually implementing poly multiply
(four if anyone ever gets around to implementing the sparc64-2011 insn),
perhaps it's time to implement this generically?
Perhaps declared in host-utils.c and implemented in util/?
Cleanup for another patchset, of course.
r~
