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softpipe: Add support for TGSI_OPCODE_INTERP_OFFSET

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Since for this opcode the offsets are given manually the function
should actually also work for non-zero offsets, but the related piglits
only ever test with offset 0. Accordingly the patch satisfies
"fs-interpolateatoffset-*".

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
Gert Wollny 2019-04-24 09:53:56 +02:00
parent 27bfd57bc7
commit c3df4e0601
1 changed files with 32 additions and 0 deletions
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32
src/gallium/auxiliary/tgsi/tgsi_exec.c
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@ -5205,6 +5205,35 @@ exec_interp_at_sample(struct tgsi_exec_machine *mach,
store_dest(mach, &result[chan], &inst->Dst[0], inst, chan, TGSI_EXEC_DATA_FLOAT);
}
}
static void
exec_interp_at_offset(struct tgsi_exec_machine *mach,
const struct tgsi_full_instruction *inst)
{
union tgsi_exec_channel index;
union tgsi_exec_channel index2D;
union tgsi_exec_channel ofsx;
union tgsi_exec_channel ofsy;
const struct tgsi_full_src_register *reg = &inst->Src[0];
assert(reg->Register.File == TGSI_FILE_INPUT);
get_index_registers(mach, reg, &index, &index2D);
unsigned pos = index2D.i[0] * TGSI_EXEC_MAX_INPUT_ATTRIBS + index.i[0];
fetch_source(mach, &ofsx, &inst->Src[1], TGSI_CHAN_X, TGSI_EXEC_DATA_FLOAT);
fetch_source(mach, &ofsy, &inst->Src[1], TGSI_CHAN_Y, TGSI_EXEC_DATA_FLOAT);
for (int chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
if (!(inst->Dst[0].Register.WriteMask & (1 << chan)))
continue;
union tgsi_exec_channel result;
fetch_src_file_channel(mach, TGSI_FILE_INPUT, chan, &index, &index2D, &result);
mach->InputSampleOffsetApply[pos](mach, pos, chan, ofsx.f[chan], ofsy.f[chan], &result);
store_dest(mach, &result, &inst->Dst[0], inst, chan, TGSI_EXEC_DATA_FLOAT);
}
}
/**
* Execute a TGSI instruction.
* Returns TRUE if a barrier instruction is hit,
@ -6252,6 +6281,9 @@ exec_instruction(
case TGSI_OPCODE_INTERP_SAMPLE:
exec_interp_at_sample(mach, inst);
break;
case TGSI_OPCODE_INTERP_OFFSET:
exec_interp_at_offset(mach, inst);
break;
default:
assert( 0 );
}