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intel/compiler: also set F execution type for mixed float mode in BDW

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The section 'Execution Data Types' of 3D Media GPGPU volume, which
describes execution types, is exactly the same in BDW and SKL+.

Also, this section states that there is a single execution type, so it
makes sense that this is the wider of the two floating point types
involved in mixed float mode, which is what we do for SKL+ and CHV.

v2:
 - Make sure we also account for the destination type in mixed mode (Curro).

Acked-by: Francisco Jerez <currojerez@riseup.net>
This commit is contained in:
Iago Toral Quiroga
2019-02-05 13:50:09 +01:00
committed by Juan A. Suarez Romero
parent 100debc3c9
commit 6ff52f0628
1 changed files with 20 additions and 16 deletions
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36
src/intel/compiler/brw_eu_validate.c
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@@ -348,6 +348,17 @@ is_unsupported_inst(const struct gen_device_info *devinfo,
return brw_opcode_desc(devinfo, brw_inst_opcode(devinfo, inst)) == NULL;
}
/**
* Returns whether a combination of two types would qualify as mixed float
* operation mode
*/
static inline bool
types_are_mixed_float(enum brw_reg_type t0, enum brw_reg_type t1)
{
return (t0 == BRW_REGISTER_TYPE_F && t1 == BRW_REGISTER_TYPE_HF) ||
(t1 == BRW_REGISTER_TYPE_F && t0 == BRW_REGISTER_TYPE_HF);
}
static enum brw_reg_type
execution_type_for_type(enum brw_reg_type type)
{
@@ -390,20 +401,24 @@ execution_type(const struct gen_device_info *devinfo, const brw_inst *inst)
enum brw_reg_type src0_exec_type, src1_exec_type;
/* Execution data type is independent of destination data type, except in
* mixed F/HF instructions on CHV and SKL+.
* mixed F/HF instructions.
*/
enum brw_reg_type dst_exec_type = brw_inst_dst_type(devinfo, inst);
src0_exec_type = execution_type_for_type(brw_inst_src0_type(devinfo, inst));
if (num_sources == 1) {
if ((devinfo->gen >= 9 || devinfo->is_cherryview) &&
src0_exec_type == BRW_REGISTER_TYPE_HF) {
if (src0_exec_type == BRW_REGISTER_TYPE_HF)
return dst_exec_type;
}
return src0_exec_type;
}
src1_exec_type = execution_type_for_type(brw_inst_src1_type(devinfo, inst));
if (types_are_mixed_float(src0_exec_type, src1_exec_type) ||
types_are_mixed_float(src0_exec_type, dst_exec_type) ||
types_are_mixed_float(src1_exec_type, dst_exec_type)) {
return BRW_REGISTER_TYPE_F;
}
if (src0_exec_type == src1_exec_type)
return src0_exec_type;
@@ -431,18 +446,7 @@ execution_type(const struct gen_device_info *devinfo, const brw_inst *inst)
src1_exec_type == BRW_REGISTER_TYPE_DF)
return BRW_REGISTER_TYPE_DF;
if (devinfo->gen >= 9 || devinfo->is_cherryview) {
if (dst_exec_type == BRW_REGISTER_TYPE_F ||
src0_exec_type == BRW_REGISTER_TYPE_F ||
src1_exec_type == BRW_REGISTER_TYPE_F) {
return BRW_REGISTER_TYPE_F;
} else {
return BRW_REGISTER_TYPE_HF;
}
}
assert(src0_exec_type == BRW_REGISTER_TYPE_F);
return BRW_REGISTER_TYPE_F;
unreachable("not reached");
}
/**