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aco: use Info::definition_size instead of definition's regclass

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16-bit abs/neg creates v_xor_b32/v_and_b32 with v2b definitions. These
instructions never do partial writes without SDWA.

No shader-db changes.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5040>
This commit is contained in:
Rhys Perry 2020-05-15 15:25:44 +01:00 • committed by Marge Bot
parent 207c35cbe8
commit edf863d1d2
2 changed files with 5 additions and 4 deletions
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7
src/amd/compiler/aco_register_allocation.cpp
View file

@ -411,7 +411,7 @@ std::pair<unsigned, unsigned> get_subdword_definition_info(Program *program, con
else if (instr->format == Format::PSEUDO)
return std::make_pair(4, rc.size() * 4u);
bool can_do_partial = chip >= GFX10;
unsigned bytes_written = chip >= GFX10 ? rc.bytes() : 4u;
switch (instr->opcode) {
case aco_opcode::v_mad_f16:
case aco_opcode::v_mad_u16:
@ -419,11 +419,12 @@ std::pair<unsigned, unsigned> get_subdword_definition_info(Program *program, con
case aco_opcode::v_fma_f16:
case aco_opcode::v_div_fixup_f16:
case aco_opcode::v_interp_p2_f16:
can_do_partial = chip >= GFX9;
bytes_written = chip >= GFX9 ? rc.bytes() : 4u;
break;
default:
break;
}
bytes_written = MAX2(bytes_written, instr_info.definition_size[(int)instr->opcode] / 8u);
if (can_use_SDWA(chip, instr)) {
return std::make_pair(rc.bytes(), rc.bytes());
@ -450,7 +451,7 @@ std::pair<unsigned, unsigned> get_subdword_definition_info(Program *program, con
break;
}
return std::make_pair(4u, can_do_partial ? rc.bytes() : 4u);
return std::make_pair(4u, bytes_written);
}
void add_subdword_definition(Program *program, aco_ptr<Instruction>& instr, unsigned idx, PhysReg reg, bool is_partial)

2
src/amd/compiler/aco_validate.cpp
View file

@ -568,7 +568,7 @@ unsigned get_subdword_bytes_written(Program *program, const aco_ptr<Instruction>
break;
}
return chip >= GFX10 ? def.bytes() : 4;
return MAX2(chip >= GFX10 ? def.bytes() : 4, instr_info.definition_size[(int)instr->opcode] / 8u);
}
} /* end namespace */