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gm107/ir: use lane 0 for manual textureGrad handling

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This is parallel to the pre-SM50 change which does this. Adjusts the
shuffles / quadops to make the values correct relative to lane 0, and
then splat the results to all lanes for the final move into the target
register.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Tested-By: Karol Herbst <kherbst@redhat.com>
This commit is contained in:
Ilia Mirkin 2017-12-19 23:37:25 -05:00
parent fbac9f86aa
commit 05944a392e
1 changed files with 34 additions and 21 deletions
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55
src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp
View file

@ -95,55 +95,58 @@ GM107LegalizeSSA::visit(Instruction *i)
bool
GM107LoweringPass::handleManualTXD(TexInstruction *i)
{
static const uint8_t qOps[4][2] =
{
{ QUADOP(MOV2, ADD, MOV2, ADD), QUADOP(MOV2, MOV2, ADD, ADD) }, // l0
{ QUADOP(SUBR, MOV2, SUBR, MOV2), QUADOP(MOV2, MOV2, ADD, ADD) }, // l1
{ QUADOP(MOV2, ADD, MOV2, ADD), QUADOP(SUBR, SUBR, MOV2, MOV2) }, // l2
{ QUADOP(SUBR, MOV2, SUBR, MOV2), QUADOP(SUBR, SUBR, MOV2, MOV2) }, // l3
};
// See NVC0LoweringPass::handleManualTXD for rationale. This function
// implements the same logic, but using SM50-friendly primitives.
static const uint8_t qOps[2] =
{ QUADOP(MOV2, ADD, MOV2, ADD), QUADOP(MOV2, MOV2, ADD, ADD) };
Value *def[4][4];
Value *crd[3];
Value *crd[3], *arr, *shadow;
Value *tmp;
Instruction *tex, *add;
Value *zero = bld.loadImm(bld.getSSA(), 0);
Value *quad = bld.mkImm(SHFL_BOUND_QUAD);
int l, c;
const int dim = i->tex.target.getDim() + i->tex.target.isCube();
const int array = i->tex.target.isArray();
const int indirect = i->tex.rIndirectSrc >= 0;
i->op = OP_TEX; // no need to clone dPdx/dPdy later
for (c = 0; c < dim; ++c)
crd[c] = bld.getScratch();
arr = bld.getScratch();
shadow = bld.getScratch();
tmp = bld.getScratch();
for (l = 0; l < 4; ++l) {
Value *src[3], *val;
// mov coordinates from lane l to all lanes
Value *lane = bld.mkImm(l);
bld.mkOp(OP_QUADON, TYPE_NONE, NULL);
// Make sure lane 0 has the appropriate array/depth compare values
if (l != 0) {
if (array)
bld.mkOp3(OP_SHFL, TYPE_F32, arr, i->getSrc(0), lane, quad);
if (i->tex.target.isShadow())
bld.mkOp3(OP_SHFL, TYPE_F32, shadow, i->getSrc(array + dim + indirect), lane, quad);
}
// mov coordinates from lane l to all lanes
for (c = 0; c < dim; ++c) {
bld.mkOp3(OP_SHFL, TYPE_F32, crd[c], i->getSrc(c + array),
bld.mkImm(l), bld.mkImm(SHFL_BOUND_QUAD));
add = bld.mkOp2(OP_QUADOP, TYPE_F32, crd[c], crd[c], zero);
add->subOp = 0x00;
add->lanes = 1; /* abused for .ndv */
bld.mkOp3(OP_SHFL, TYPE_F32, crd[c], i->getSrc(c + array), lane, quad);
}
// add dPdx from lane l to lanes dx
for (c = 0; c < dim; ++c) {
bld.mkOp3(OP_SHFL, TYPE_F32, tmp, i->dPdx[c].get(), bld.mkImm(l),
bld.mkImm(SHFL_BOUND_QUAD));
bld.mkOp3(OP_SHFL, TYPE_F32, tmp, i->dPdx[c].get(), lane, quad);
add = bld.mkOp2(OP_QUADOP, TYPE_F32, crd[c], tmp, crd[c]);
add->subOp = qOps[l][0];
add->subOp = qOps[0];
add->lanes = 1; /* abused for .ndv */
}
// add dPdy from lane l to lanes dy
for (c = 0; c < dim; ++c) {
bld.mkOp3(OP_SHFL, TYPE_F32, tmp, i->dPdy[c].get(), bld.mkImm(l),
bld.mkImm(SHFL_BOUND_QUAD));
bld.mkOp3(OP_SHFL, TYPE_F32, tmp, i->dPdy[c].get(), lane, quad);
add = bld.mkOp2(OP_QUADOP, TYPE_F32, crd[c], tmp, crd[c]);
add->subOp = qOps[l][1];
add->subOp = qOps[1];
add->lanes = 1; /* abused for .ndv */
}
@ -164,8 +167,18 @@ GM107LoweringPass::handleManualTXD(TexInstruction *i)
// texture
bld.insert(tex = cloneForward(func, i));
if (l != 0) {
if (array)
tex->setSrc(0, arr);
if (i->tex.target.isShadow())
tex->setSrc(array + dim + indirect, shadow);
}
for (c = 0; c < dim; ++c)
tex->setSrc(c + array, src[c]);
// broadcast results from lane 0 to all lanes
if (l != 0)
for (c = 0; i->defExists(c); ++c)
bld.mkOp3(OP_SHFL, TYPE_F32, tex->getDef(c), tex->getDef(c), bld.mkImm(0), quad);
bld.mkOp(OP_QUADPOP, TYPE_NONE, NULL);
// save results