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dev:crosscompiler:backend_arm:register_allocation [2018/12/21 10:44] – [Parameter Passing] ursgraf | dev:crosscompiler:backend_arm:register_allocation [2019/08/29 16:01] – [Parameter Passing] ursgraf | ||
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| R15 | dedicated | PC | | | R15 | dedicated | PC | | ||
| D0 | dedicated| scratch register | | | D0 | dedicated| scratch register | | ||
- | | D1 | volatile | + | | D1 | dedicated| scratch register, return value | |
- | | D2-D6 | volatile | further | + | | D2-D6 | volatile | parameters, local variables | |
| D7-D10 | volatile | local variables | | | D7-D10 | volatile | local variables | | ||
| D11-D31 | nonvolatile | local variables | | | D11-D31 | nonvolatile | local variables | | ||
Line 34: | Line 34: | ||
Parameters are passed in R0..R5 and D1..D6.\\ | Parameters are passed in R0..R5 and D1..D6.\\ | ||
In the interface // | In the interface // | ||
- | ^S0^S1^S2^S3^S4^S5^S6^S7^S8^S9^ | + | |S0|S1|S2|S3|S4|S5|S6|S7|S8|S9|S10|S11| |
- | ^ | + | | |
- | ^ ^^a^ ^ b ^^c^ ^ d ^^ | + | | ^| ^^a| ^ b ^^c| ^ d ^^ |
===== Locals on the Stack ===== | ===== Locals on the Stack ===== | ||
Line 57: | Line 57: | ||
+ | When dividing numbers of type long, a large number of auxiliary registers are necessary. For these cases the register allocation is run with a reduced register set with the same reserved registers as above given above. |