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fixed docs on rsave()/rrestore() builtin functions
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@ -67,19 +67,6 @@ sys (part of syslib)
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Efficiently set a part of memory to the given (u)word value.
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Efficiently set a part of memory to the given (u)word value.
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But the most efficient will always be to write a specialized fill routine in assembly yourself!
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But the most efficient will always be to write a specialized fill routine in assembly yourself!
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``rsave()``
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Saves the CPU registers and the status flags.
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You can now more or less 'safely' use the registers directly, until you
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restore them again so the generated code can carry on normally.
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Note: it's not needed to rsave() before an asm subroutine that clobbers the X register
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(which is used as the internal evaluation stack pointer).
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The compiler will take care of this situation automatically.
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Note: the 16 bit 'virtual' registers of the Commander X16 are *not* saved.
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``rrestore()``
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Restores the CPU registers and the status flags from previously saved values.
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Note: the 16 bit 'virtual' registers of the Commander X16 are *not* restored.
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``read_flags() -> ubyte``
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``read_flags() -> ubyte``
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Returns the current value of the CPU status register.
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Returns the current value of the CPU status register.
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@ -960,9 +960,14 @@ callrom(bank, address, argumentaddress) ; NOTE: specific to cx16 compiler t
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rsave, rsavex
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rsave, rsavex
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Saves all registers including status (or only X) on the stack
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Saves all registers including status (or only X) on the stack
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It's not needed to rsave()/rsavex() before an asm subroutine that clobbers the X register
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(which is used by prog8 as the internal evaluation stack pointer);
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the compiler will take care of this situation automatically.
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Note: the 16 bit 'virtual' registers of the Commander X16 are *not* saved.
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rrestore, rrestorex
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rrestore, rrestorex
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Restore all registers including status (or only X) back from the cpu hardware stack
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Restore all registers including status (or only X) back from the cpu hardware stack
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Note: the 16 bit 'virtual' registers of the Commander X16 are *not* restored.
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Library routines
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Library routines
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