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broadcom/vc5: Do 16-bit unpacking of integer texture returns properly. 

We were doing f16 unpacks, which trashed "1" values.  Fixes many piglit
texwrap GL_EXT_texture_integer cases.
This commit is contained in:
Eric Anholt 2017-11-07 10:34:42 -08:00
parent 80da60947b
commit 50906e4583
1 changed files with 28 additions and 7 deletions
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35
src/broadcom/compiler/nir_to_vir.c
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@ -477,14 +477,35 @@ ntq_emit_tex(struct v3d_compile *c, nir_tex_instr *instr)
STATIC_ASSERT(PIPE_SWIZZLE_X == 0);
chan = return_values[i / 2];
enum v3d_qpu_input_unpack unpack;
if (i & 1)
unpack = V3D_QPU_UNPACK_H;
else
unpack = V3D_QPU_UNPACK_L;
if (nir_alu_type_get_base_type(instr->dest_type) ==
nir_type_float) {
enum v3d_qpu_input_unpack unpack;
if (i & 1)
unpack = V3D_QPU_UNPACK_H;
else
unpack = V3D_QPU_UNPACK_L;
chan = vir_FMOV(c, chan);
vir_set_unpack(c->defs[chan.index], 0, unpack);
chan = vir_FMOV(c, chan);
vir_set_unpack(c->defs[chan.index], 0, unpack);
} else {
/* If we're unpacking the low field, shift it
* up to the top first.
*/
if ((i & 1) == 0) {
chan = vir_SHL(c, chan,
vir_uniform_ui(c, 16));
}
/* Do proper sign extension to a 32-bit int. */
if (nir_alu_type_get_base_type(instr->dest_type) ==
nir_type_int) {
chan = vir_ASR(c, chan,
vir_uniform_ui(c, 16));
} else {
chan = vir_SHR(c, chan,
vir_uniform_ui(c, 16));
}
}
} else {
chan = vir_MOV(c, return_values[i]);
}