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Source Register: Difference between revisions
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Any register from R<sub>0</sub> to R<sub>15</sub> can serve as S<sub>reg</sub>. R<sub>0</sub> is the default. | Any register from R<sub>0</sub> to R<sub>15</sub> can serve as S<sub>reg</sub>. R<sub>0</sub> is the default. | ||
Some instructions ignore the source register. No instructions modify its value. | |||
=== See Also === | === See Also === | ||
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[[Category:Registers]] | [[Category:Registers]] | ||
[[Category:Super FX]] | [[Category:Super FX]] | ||
[[Category:ASM]] | |||
Latest revision as of 20:11, 4 August 2024
The Source Register (Sreg) exists on the Super FX. It is assigned with FROM or WITH. It supplies the input for many instructions, including:
- ADC Rn
- ADC #n
- ADD Rn
- ADD #n
- AND Rn
- AND #n
- ASR
- BIC Rn
- BIC #n
- CMODE
- CMP Rn
- COLOR
- DIV2
- FMULT
- GETBH
- GETBL
- HIB
- LJMP
- LMULT
- LOB
- LSR
- MULT Rn
- MULT #n
- NOT
- OR Rn
- OR #n
- RAMB
- ROL
- ROMB
- ROR
- SBC Rn
- SBK
- SEX
- STB
- STW
- SUB Rn
- SUB #n
- SWAP
- UMULT
Any register from R0 to R15 can serve as Sreg. R0 is the default.
Some instructions ignore the source register. No instructions modify its value.