dev:crosscompiler:backend_arm:code_generator
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| Both sides previous revisionPrevious revision | Next revisionBoth sides next revision | ||
| dev:crosscompiler:backend_arm:code_generator [2019/10/01 12:21] – [Stackframe] ursgraf | dev:crosscompiler:backend_arm:code_generator [2019/11/15 16:33] – [Stackframe] ursgraf | ||
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| Explanation: | Explanation: | ||
| - | LR is saved onto the stack together with the necessary nonvolatile GPRs. Even if method is a leaf method LR must be saved onto the stack because LR serves as a scratch register within a method. Considering the GPR's and EXTRs, all nonvolatile register, which are used within this method, must be saved on the stack. Nonvolatiles in EXTR registers occupy either 8 bytes (EXTRD) or 4 bytes (EXTRS). \\ | + | LR is saved onto the stack together with the necessary nonvolatile GPRs. Even if a method is a leaf method LR must be saved onto the stack because LR serves as a scratch register within a method. Considering the GPR's and EXTRs, all nonvolatile register, which are used within this method, must be saved on the stack. Nonvolatiles in EXTR registers occupy either 8 bytes (EXTRD) or 4 bytes (EXTRS). \\ |
| Important: volatile EXTR's must be saved as well if '' | Important: volatile EXTR's must be saved as well if '' | ||
dev/crosscompiler/backend_arm/code_generator.txt · Last modified: 2022/12/20 11:34 by ursgraf
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