diff options
| author | Boris Brezillon <boris.brezillon@collabora.com> | 2020-10-14 14:10:14 +0200 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@collabora.com> | 2020-10-15 08:05:23 +0200 |
| commit | 0d40460757b809c8c28ee78f79e87a01e79bc518 (patch) | |
| tree | 4931156b98722cd7863a835718354ba81075d82e | |
| parent | 3432d0a3e53896348d840176722be46d080ad439 (diff) | |
pan/bi: Reserve r0-r3 in blend shaders
Blend shaders are passed the source color through r0-r3. Let's avoid
allocating those. The is definitely not the right solution but is good
enough for now.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7151>
| -rw-r--r-- | src/panfrost/bifrost/bi_ra.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/panfrost/bifrost/bi_ra.c b/src/panfrost/bifrost/bi_ra.c index 6760546f0aa..7a3b307eedc 100644 --- a/src/panfrost/bifrost/bi_ra.c +++ b/src/panfrost/bifrost/bi_ra.c @@ -69,8 +69,15 @@ bi_allocate_registers(bi_context *ctx, bool *success) struct lcra_state *l = lcra_alloc_equations(node_count, 1); - l->class_start[BI_REG_CLASS_WORK] = 0; - l->class_size[BI_REG_CLASS_WORK] = 64 * 4; /* R0 - R63, all 32-bit */ + if (ctx->is_blend) { + /* R0-R3 are reserved for the blend input */ + l->class_start[BI_REG_CLASS_WORK] = 4 * 4; + l->class_size[BI_REG_CLASS_WORK] = 64 * 4; + } else { + /* R0 - R63, all 32-bit */ + l->class_start[BI_REG_CLASS_WORK] = 0; + l->class_size[BI_REG_CLASS_WORK] = 64 * 4; + } bi_foreach_instr_global(ctx, ins) { unsigned dest = ins->dest; |