disas: nanoMIPS: Comment the decoder of 'gpr2.reg1' gpr encoding type
Comment the decoder of 'gpr2.reg1' gpr encoding type in nanoMIPS disassembler. Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
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@ -468,6 +468,28 @@ uint64 NMD::decode_gpr_gpr4(uint64 d)
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}
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/*
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* NMD::decode_gpr_gpr2_reg1() - decoder for 'gpr2.reg1' gpr encoding type
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*
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* Map a 2-bit code to the 5-bit register space according to this pattern:
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*
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* 3 2 1 0
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* | | | |
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* | | | |
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* | | | └-------------------┐
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* | | └-------------------┐ |
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* | └-------------------┐ | |
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* └-------------------┐ | | |
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* | | | |
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* | | | |
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* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
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* 3 2 1 0
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*
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* Used in handling following instructions:
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*
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* - MOVEP
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* - MOVEP[REV]
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*/
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uint64 NMD::decode_gpr_gpr2_reg1(uint64 d)
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{
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static uint64 register_list[] = { 4, 5, 6, 7 };
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