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AMDGPU: Error if branch distance exceeds limit
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Authored by arsenm on May 12 2016, 9:55 PM.

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• tstellarAMD

arsenm retitled this revision from to AMDGPU: Error if branch distance exceeds limit.

arsenm updated this object.

arsenm added a subscriber: llvm-commits.

LGTM.

This revision is now accepted and ready to land.May 18 2016, 6:41 AM

r269951

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lib/

Target/

AMDGPU/

MCTargetDesc/

6 lines

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	}			}

	void AMDGPUAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,			void AMDGPUAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
	unsigned DataSize, uint64_t Value,			unsigned DataSize, uint64_t Value,
	bool IsPCRel) const {			bool IsPCRel) const {

	switch ((unsigned)Fixup.getKind()) {			switch ((unsigned)Fixup.getKind()) {
	case AMDGPU::fixup_si_sopp_br: {			case AMDGPU::fixup_si_sopp_br: {
				int64_t BrImm = (Value - 4) / 4;
				if (!isInt<16>(BrImm))
				report_fatal_error("branch size exceeds simm16");

	uint16_t Dst = (uint16_t)(Data + Fixup.getOffset());			uint16_t Dst = (uint16_t)(Data + Fixup.getOffset());
	*Dst = (Value - 4) / 4;			*Dst = BrImm;
	break;			break;
	}			}

	case AMDGPU::fixup_si_rodata: {			case AMDGPU::fixup_si_rodata: {
	uint32_t Dst = (uint32_t)(Data + Fixup.getOffset());			uint32_t Dst = (uint32_t)(Data + Fixup.getOffset());
	// We emit constant data at the end of the text section and generate its			// We emit constant data at the end of the text section and generate its
	// address using the following code sequence:			// address using the following code sequence:
	// s_getpc_b64 s[0:1]			// s_getpc_b64 s[0:1]
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