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authorEric Anholt <[email protected]>2018-02-07 15:22:19 +0000
committerEric Anholt <[email protected]>2018-03-09 09:59:54 -0800
commit46a32e3d2e84bd4dfff9e76f0f1f21613e1bc5a9 (patch)
tree3df62f8ee9140c1bda3d1e8dfc69ed12267eeccf /src/gallium/drivers/vc4/vc4_program.c
parent2725ab2b12385eccfbdafe6f158661aca6bf778e (diff)
broadcom/vc4: Allow binding non-zero constant buffers.
We're going to use UBO loads for implementing YUV linear-to-T-format blits.
Diffstat (limited to 'src/gallium/drivers/vc4/vc4_program.c')
-rw-r--r--src/gallium/drivers/vc4/vc4_program.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c
index be80a851d2a..2ec6aa471d4 100644
--- a/src/gallium/drivers/vc4/vc4_program.c
+++ b/src/gallium/drivers/vc4/vc4_program.c
@@ -137,6 +137,32 @@ indirect_uniform_load(struct vc4_compile *c, nir_intrinsic_instr *intr)
return qir_TEX_RESULT(c);
}
+static struct qreg
+vc4_ubo_load(struct vc4_compile *c, nir_intrinsic_instr *intr)
+{
+ nir_const_value *buffer_index =
+ nir_src_as_const_value(intr->src[0]);
+ assert(buffer_index->u32[0] == 1);
+ assert(c->stage == QSTAGE_FRAG);
+
+ struct qreg offset = ntq_get_src(c, intr->src[1], 0);
+
+ /* Clamp to [0, array size). Note that MIN/MAX are signed. */
+ offset = qir_MAX(c, offset, qir_uniform_ui(c, 0));
+ offset = qir_MIN_NOIMM(c, offset,
+ qir_uniform_ui(c, c->fs_key->ubo_1_size - 4));
+
+ qir_ADD_dest(c, qir_reg(QFILE_TEX_S_DIRECT, 0),
+ offset,
+ qir_uniform(c, QUNIFORM_UBO_ADDR, buffer_index->u32[0]));
+
+ c->num_texture_samples++;
+
+ ntq_emit_thrsw(c);
+
+ return qir_TEX_RESULT(c);
+}
+
nir_ssa_def *
vc4_nir_get_swizzled_channel(nir_builder *b, nir_ssa_def **srcs, int swiz)
{
@@ -1775,6 +1801,11 @@ ntq_emit_intrinsic(struct vc4_compile *c, nir_intrinsic_instr *instr)
}
break;
+ case nir_intrinsic_load_ubo:
+ assert(instr->num_components == 1);
+ ntq_store_dest(c, &instr->dest, 0, vc4_ubo_load(c, instr));
+ break;
+
case nir_intrinsic_load_user_clip_plane:
for (int i = 0; i < instr->num_components; i++) {
ntq_store_dest(c, &instr->dest, i,
@@ -2726,7 +2757,8 @@ vc4_update_compiled_fs(struct vc4_context *vc4, uint8_t prim_mode)
VC4_DIRTY_RASTERIZER |
VC4_DIRTY_SAMPLE_MASK |
VC4_DIRTY_FRAGTEX |
- VC4_DIRTY_UNCOMPILED_FS))) {
+ VC4_DIRTY_UNCOMPILED_FS |
+ VC4_DIRTY_UBO_1_SIZE))) {
return;
}
@@ -2770,6 +2802,7 @@ vc4_update_compiled_fs(struct vc4_context *vc4, uint8_t prim_mode)
PIPE_SPRITE_COORD_UPPER_LEFT);
}
+ key->ubo_1_size = vc4->constbuf[PIPE_SHADER_FRAGMENT].cb[1].buffer_size;
key->light_twoside = vc4->rasterizer->base.light_twoside;
struct vc4_compiled_shader *old_fs = vc4->prog.fs;