diff options
Diffstat (limited to 'src/gallium/auxiliary/tgsi/tgsi_ureg.c')
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_ureg.c | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.c b/src/gallium/auxiliary/tgsi/tgsi_ureg.c index 368b7a6f9e..ba84a82b2b 100644 --- a/src/gallium/auxiliary/tgsi/tgsi_ureg.c +++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.c @@ -69,6 +69,7 @@ struct ureg_tokens { #define UREG_MAX_INPUT PIPE_MAX_ATTRIBS #define UREG_MAX_OUTPUT PIPE_MAX_ATTRIBS #define UREG_MAX_IMMEDIATE 32 +#define UREG_MAX_TEMP 256 #define DOMAIN_DECL 0 #define DOMAIN_INSN 1 @@ -94,12 +95,13 @@ struct ureg_program struct { float v[4]; unsigned nr; - } immediate[UREG_MAX_OUTPUT]; + } immediate[UREG_MAX_IMMEDIATE]; unsigned nr_immediates; + unsigned temps_active[UREG_MAX_TEMP / 32]; + unsigned nr_temps; unsigned nr_constants; - unsigned nr_temps; unsigned nr_samplers; struct ureg_tokens domain[2]; @@ -303,11 +305,41 @@ struct ureg_src ureg_DECL_constant(struct ureg_program *ureg ) } -/* Allocate a new temporary. No way to release temporaries in this code. +/* Allocate a new temporary. Temporaries greater than UREG_MAX_TEMP + * are legal, but will not be released. */ struct ureg_dst ureg_DECL_temporary( struct ureg_program *ureg ) { - return ureg_dst_register( TGSI_FILE_TEMPORARY, ureg->nr_temps++ ); + unsigned i; + + for (i = 0; i < UREG_MAX_TEMP; i += 32) { + int bit = ffs(~ureg->temps_active[i/32]); + if (bit != 0) { + i += bit - 1; + goto out; + } + } + + /* No reusable temps, so allocate a new one: + */ + i = ureg->nr_temps++; + +out: + if (i < UREG_MAX_TEMP) + ureg->temps_active[i/32] |= 1 << (i % 32); + + if (i >= ureg->nr_temps) + ureg->nr_temps = i + 1; + + return ureg_dst_register( TGSI_FILE_TEMPORARY, i ); +} + + +void ureg_release_temporary( struct ureg_program *ureg, + struct ureg_dst tmp ) +{ + if (tmp.Index < UREG_MAX_TEMP) + ureg->temps_active[tmp.Index/32] &= ~(1 << (tmp.Index % 32)); } |