With -xprefetch=explicit, the compiler will recognize the directives:
$PRAGMA SUN_PREFETCH_READ_ONCE (name) |
$PRAGMA SUN_PREFETCH_READ_MANY (name) |
$PRAGMA SUN_PREFETCH_WRITE_ONCE (name) |
$PRAGMA SUN_PREFETCH_WRITE_MANY (name) |
The -xchip setting effects the determination of the assumed latencies and therefore the result of a latx:factor setting.
The latx:factor suboption is valid only when automatic prefetching (auto) is enabled on SPARC processors.