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R600: Implement a few simple TTI queries.
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Authored by arsenm on Jul 18 2014, 12:05 PM.

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arsenm

Summary

I'm not sure if these have any effect right now.

arsenm retitled this revision from to R600: Implement a few simple TTI queries. .

arsenm updated this object.

arsenm edited the test plan for this revision. (Show Details)

arsenm added a subscriber: Unknown Object (MLST).

r213455

This revision is now accepted and ready to land.Jul 19 2014, 11:24 AM

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lib/

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R600/

24 lines

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	PopcntSupportKind getPopcntSupport(unsigned IntTyWidthInBit) const override;	PopcntSupportKind getPopcntSupport(unsigned IntTyWidthInBit) const override;

		unsigned getNumberOfRegisters(bool Vector) const override;
		unsigned getRegisterBitWidth(bool Vector) const override;
		unsigned getMaximumUnrollFactor() const override;

	/// @}	/// @}
	};	};

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	assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2");	assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2");
	return ST->hasBCNT(TyWidth) ? PSK_FastHardware : PSK_Software;	return ST->hasBCNT(TyWidth) ? PSK_FastHardware : PSK_Software;
	}	}

		unsigned AMDGPUTTI::getNumberOfRegisters(bool Vec) const {
		if (Vec)
		return 0;

		// Number of VGPRs on SI.
		if (ST->getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS)
		return 256;

		return 4 * 128; // XXX - 4 channels. Should these count as vector instead?
		}

		unsigned AMDGPUTTI::getRegisterBitWidth(bool) const {
		return 32;
		}

		unsigned AMDGPUTTI::getMaximumUnrollFactor() const {
		// Semi-arbitrary large amount.
		return 64;
		}
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