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i965: Add reads_accumulator_implicitly() function.

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Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner 2014-04-09 12:01:49 -07:00
parent cb6566f9df
commit 6541f1b4d0
2 changed files with 14 additions and 0 deletions
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13
src/mesa/drivers/dri/i965/brw_shader.cpp
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@ -662,6 +662,19 @@ backend_instruction::can_do_saturate() const
}
}
bool
backend_instruction::reads_accumulator_implicitly() const
{
switch (opcode) {
case BRW_OPCODE_MAC:
case BRW_OPCODE_MACH:
case BRW_OPCODE_SADA2:
return true;
default:
return false;
}
}
bool
backend_instruction::has_side_effects() const
{

1
src/mesa/drivers/dri/i965/brw_shader.h
View file

@ -47,6 +47,7 @@ public:
bool is_control_flow() const;
bool can_do_source_mods() const;
bool can_do_saturate() const;
bool reads_accumulator_implicitly() const;
/**
* True if the instruction has side effects other than writing to