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gallium/tgsi/ureg: Support local temporary emission.

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This commit is contained in:
Francisco Jerez 2012-03-26 17:55:30 +02:00
parent 1b8aecc797
commit b52e374ad3
2 changed files with 60 additions and 6 deletions
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58
src/gallium/auxiliary/tgsi/tgsi_ureg.c
View file

@ -152,6 +152,7 @@ struct ureg_program
unsigned nr_sampler_views;
struct util_bitmask *free_temps;
struct util_bitmask *local_temps;
unsigned nr_temps;
struct const_decl const_decls;
@ -530,11 +531,19 @@ out:
return ureg_src_register(TGSI_FILE_CONSTANT, index);
}
struct ureg_dst ureg_DECL_temporary( struct ureg_program *ureg )
static struct ureg_dst alloc_temporary( struct ureg_program *ureg,
boolean local )
{
unsigned i;
/* Look for a released temporary.
*/
unsigned i = util_bitmask_get_first_index(ureg->free_temps);
for (i = util_bitmask_get_first_index(ureg->free_temps);
i != UTIL_BITMASK_INVALID_INDEX;
i = util_bitmask_get_next_index(ureg->free_temps, i + 1)) {
if (util_bitmask_get(ureg->local_temps, i) == local)
break;
}
/* Or allocate a new one.
*/
@ -543,9 +552,22 @@ struct ureg_dst ureg_DECL_temporary( struct ureg_program *ureg )
util_bitmask_clear(ureg->free_temps, i);
if (local)
util_bitmask_set(ureg->local_temps, i);
return ureg_dst_register( TGSI_FILE_TEMPORARY, i );
}
struct ureg_dst ureg_DECL_temporary( struct ureg_program *ureg )
{
return alloc_temporary(ureg, FALSE);
}
struct ureg_dst ureg_DECL_local_temporary( struct ureg_program *ureg )
{
return alloc_temporary(ureg, TRUE);
}
void ureg_release_temporary( struct ureg_program *ureg,
struct ureg_dst tmp )
{
@ -1239,6 +1261,25 @@ emit_decl_fs(struct ureg_program *ureg,
}
static void emit_decl( struct ureg_program *ureg,
unsigned file,
unsigned index,
boolean local )
{
union tgsi_any_token *out = get_tokens( ureg, DOMAIN_DECL, 2 );
out[0].value = 0;
out[0].decl.Type = TGSI_TOKEN_TYPE_DECLARATION;
out[0].decl.NrTokens = 2;
out[0].decl.File = file;
out[0].decl.UsageMask = TGSI_WRITEMASK_XYZW;
out[0].decl.Local = local;
out[1].value = 0;
out[1].decl_range.First = index;
out[1].decl_range.Last = index;
}
static void emit_decl_range( struct ureg_program *ureg,
unsigned file,
unsigned first,
@ -1493,10 +1534,9 @@ static void emit_decls( struct ureg_program *ureg )
}
}
if (ureg->nr_temps) {
emit_decl_range( ureg,
TGSI_FILE_TEMPORARY,
0, ureg->nr_temps );
for (i = 0; i < ureg->nr_temps; i++) {
emit_decl( ureg, TGSI_FILE_TEMPORARY, i,
util_bitmask_get(ureg->local_temps, i) );
}
if (ureg->nr_addrs) {
@ -1658,9 +1698,14 @@ struct ureg_program *ureg_create( unsigned processor )
if (ureg->free_temps == NULL)
goto fail;
ureg->local_temps = util_bitmask_create();
if (ureg->local_temps == NULL)
goto fail;
return ureg;
fail:
FREE(ureg->free_temps);
FREE(ureg);
return NULL;
}
@ -1677,6 +1722,7 @@ void ureg_destroy( struct ureg_program *ureg )
}
util_bitmask_destroy(ureg->free_temps);
util_bitmask_destroy(ureg->local_temps);
FREE(ureg);
}

8
src/gallium/auxiliary/tgsi/tgsi_ureg.h
View file

@ -272,6 +272,14 @@ ureg_DECL_constant( struct ureg_program *,
struct ureg_dst
ureg_DECL_temporary( struct ureg_program * );
/**
* Emit a temporary with the LOCAL declaration flag set. For use when
* the register value is not required to be preserved across
* subroutine boundaries.
*/
struct ureg_dst
ureg_DECL_local_temporary( struct ureg_program * );
void
ureg_release_temporary( struct ureg_program *ureg,
struct ureg_dst tmp );