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broadcom/vc5: Use SETMSF to handle discards.

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A bit of spec text suggested that (like vc4) condition codes should be
used for discards, and the simulator was fine with it, but the 7268
disagrees and you have to use SETMSF instead or the color comes through.
Fixes glsl-fs-discard-01 and many of the interpolation-with-clipping
tests.
This commit is contained in:
Eric Anholt
2017-10-20 14:00:11 -07:00
parent a48a38937c
commit 9b5fa214f4
2 changed files with 12 additions and 25 deletions
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34
src/broadcom/compiler/nir_to_vir.c
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@@ -1030,12 +1030,6 @@ ntq_emit_alu(struct v3d_compile *c, nir_alu_instr *instr)
static void
emit_frag_end(struct v3d_compile *c)
{
uint32_t discard_cond = V3D_QPU_COND_NONE;
if (c->s->info.fs.uses_discard) {
vir_PF(c, vir_MOV(c, c->discard), V3D_QPU_PF_PUSHZ);
discard_cond = V3D_QPU_COND_IFA;
}
/* XXX
if (c->output_sample_mask_index != -1) {
vir_MS_MASK(c, c->outputs[c->output_sample_mask_index]);
@@ -1046,7 +1040,6 @@ emit_frag_end(struct v3d_compile *c)
struct qinst *inst = vir_MOV_dest(c,
vir_reg(QFILE_TLBU, 0),
c->outputs[c->output_position_index]);
vir_set_cond(inst, discard_cond);
inst->src[vir_get_implicit_uniform_src(inst)] =
vir_uniform_ui(c,
@@ -1057,7 +1050,6 @@ emit_frag_end(struct v3d_compile *c)
struct qinst *inst = vir_MOV_dest(c,
vir_reg(QFILE_TLBU, 0),
vir_reg(QFILE_NULL, 0));
vir_set_cond(inst, discard_cond);
inst->src[vir_get_implicit_uniform_src(inst)] =
vir_uniform_ui(c,
@@ -1092,14 +1084,12 @@ emit_frag_end(struct v3d_compile *c)
TLB_VEC_SIZE_MINUS_1_SHIFT);
inst = vir_MOV_dest(c, vir_reg(QFILE_TLBU, 0), color[0]);
vir_set_cond(inst, discard_cond);
inst->src[vir_get_implicit_uniform_src(inst)] =
vir_uniform_ui(c, conf);
for (int i = 1; i < num_components; i++) {
inst = vir_MOV_dest(c, vir_reg(QFILE_TLB, 0),
color[i]);
vir_set_cond(inst, discard_cond);
}
break;
@@ -1129,14 +1119,12 @@ emit_frag_end(struct v3d_compile *c)
if (c->fs_key->f32_color_rb & (1 << rt)) {
inst = vir_MOV_dest(c, vir_reg(QFILE_TLBU, 0), color[0]);
vir_set_cond(inst, discard_cond);
inst->src[vir_get_implicit_uniform_src(inst)] =
vir_uniform_ui(c, conf);
for (int i = 1; i < num_components; i++) {
inst = vir_MOV_dest(c, vir_reg(QFILE_TLB, 0),
color[i]);
vir_set_cond(inst, discard_cond);
}
} else {
inst = vir_VFPACK_dest(c, vir_reg(QFILE_TLB, 0), r, g);
@@ -1145,10 +1133,8 @@ emit_frag_end(struct v3d_compile *c)
inst->src[vir_get_implicit_uniform_src(inst)] =
vir_uniform_ui(c, conf);
}
vir_set_cond(inst, discard_cond);
inst = vir_VFPACK_dest(c, vir_reg(QFILE_TLB, 0), b, a);
vir_set_cond(inst, discard_cond);
}
break;
}
@@ -1665,10 +1651,12 @@ ntq_emit_intrinsic(struct v3d_compile *c, nir_intrinsic_instr *instr)
case nir_intrinsic_discard:
if (c->execute.file != QFILE_NULL) {
vir_PF(c, c->execute, V3D_QPU_PF_PUSHZ);
vir_MOV_cond(c, V3D_QPU_COND_IFA, c->discard,
vir_uniform_ui(c, ~0));
vir_set_cond(vir_SETMSF_dest(c, vir_reg(QFILE_NULL, 0),
vir_uniform_ui(c, 0)),
V3D_QPU_COND_IFA);
} else {
vir_MOV_dest(c, c->discard, vir_uniform_ui(c, ~0));
vir_SETMSF_dest(c, vir_reg(QFILE_NULL, 0),
vir_uniform_ui(c, 0));
}
break;
@@ -1683,9 +1671,14 @@ ntq_emit_intrinsic(struct v3d_compile *c, nir_intrinsic_instr *instr)
*/
vir_PF(c, vir_AND(c, c->execute, vir_NOT(c, cond)),
V3D_QPU_PF_PUSHZ);
vir_MOV_cond(c, V3D_QPU_COND_IFA, c->discard, cond);
vir_set_cond(vir_SETMSF_dest(c, vir_reg(QFILE_NULL, 0),
vir_uniform_ui(c, 0)),
V3D_QPU_COND_IFA);
} else {
vir_OR_dest(c, c->discard, c->discard, cond);
vir_PF(c, cond, V3D_QPU_PF_PUSHZ);
vir_set_cond(vir_SETMSF_dest(c, vir_reg(QFILE_NULL, 0),
vir_uniform_ui(c, 0)),
V3D_QPU_COND_IFNA);
}
break;
@@ -1953,9 +1946,6 @@ nir_to_vir(struct v3d_compile *c)
c->payload_w_centroid = vir_MOV(c, vir_reg(QFILE_REG, 1));
c->payload_z = vir_MOV(c, vir_reg(QFILE_REG, 2));
if (c->s->info.fs.uses_discard)
c->discard = vir_MOV(c, vir_uniform_ui(c, 0));
if (c->fs_key->is_points) {
c->point_x = emit_fragment_varying(c, NULL, 0);
c->point_y = emit_fragment_varying(c, NULL, 0);