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pan/midgard: Expand 64-bit writemasks 

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-11-04 22:20:59 -05:00
parent bda3ec5d55
commit 855eec93b1
2 changed files with 11 additions and 7 deletions
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12
src/panfrost/midgard/helpers.h
View File

@ -244,17 +244,19 @@ struct mir_ldst_op_props {
/* This file is common, so don't define the tables themselves. #include
* midgard_op.h if you need that, or edit midgard_ops.c directly */
/* Duplicate bits to convert a 4-bit writemask to duplicated 8-bit format,
* which is used for 32-bit vector units */
/* Duplicate bits to convert a per-component to duplicated 8-bit format,
* which is used for vector units */
static inline unsigned
expand_writemask_32(unsigned mask)
expand_writemask(unsigned mask, unsigned channels)
{
unsigned o = 0;
unsigned factor = 8 / channels;
unsigned expanded = (1 << factor) - 1;
for (int i = 0; i < 4; ++i)
for (unsigned i = 0; i < channels; ++i)
if (mask & (1 << i))
o |= (3 << (2 * i));
o |= (expanded << (factor * i));
return o;
}

6
src/panfrost/midgard/midgard_emit.c
View File

@ -279,8 +279,10 @@ emit_alu_bundle(compiler_context *ctx,
midgard_scalar_alu scalarized;
if (ins->unit & UNITS_ANY_VECTOR) {
if (ins->alu.reg_mode == midgard_reg_mode_32)
ins->alu.mask = expand_writemask_32(ins->mask);
if (ins->alu.reg_mode == midgard_reg_mode_64)
ins->alu.mask = expand_writemask(ins->mask, 2);
else if (ins->alu.reg_mode == midgard_reg_mode_32)
ins->alu.mask = expand_writemask(ins->mask, 4);
else
ins->alu.mask = ins->mask;