KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

intel/compiler: lower some 16-bit integer operations to 32-bit 

These are not supported in hardware for 16-bit integers.

We do the lowering pass after the optimization loop to ensure that we
lower ALU operations injected by algebraic optimizations too.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Iago Toral Quiroga 2018-04-26 10:07:56 +02:00
parent b9a3d8c23e
commit b11e9425df
1 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/intel/compiler/brw_nir.c
View File

@ -592,6 +592,25 @@ brw_nir_optimize(nir_shader *nir, const struct brw_compiler *compiler,
return nir;
}
static unsigned
lower_bit_size_callback(const nir_alu_instr *alu, void *data)
{
assert(alu->dest.dest.is_ssa);
if (alu->dest.dest.ssa.bit_size != 16)
return 0;
switch (alu->op) {
case nir_op_idiv:
case nir_op_imod:
case nir_op_irem:
case nir_op_udiv:
case nir_op_umod:
return 32;
default:
return 0;
}
}
/* Does some simple lowering and runs the standard suite of optimizations
*
* This is intended to be called more-or-less directly after you get the
@ -645,6 +664,8 @@ brw_preprocess_nir(const struct brw_compiler *compiler, nir_shader *nir)
nir = brw_nir_optimize(nir, compiler, is_scalar);
nir_lower_bit_size(nir, lower_bit_size_callback, NULL);
if (is_scalar) {
OPT(nir_lower_load_const_to_scalar);
}