Correction in documentation regarding __A__ pseudo variable
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committed by
Oliver Schmidt
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e3fa247012
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0884278ae3
@@ -709,7 +709,7 @@ This cc65 version has some extensions to the ISO C standard.
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places.
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places.
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<p>
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<p>
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<item> There are two pseudo variables named <tt/__AX__/ and <tt/__EAX__/.
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<item> There are two pseudo variables named <tt/__A__, __AX__/ and <tt/__EAX__/.
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Both refer to the primary register that is used by the compiler to
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Both refer to the primary register that is used by the compiler to
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evaluate expressions or return function results. <tt/__AX__/ is of
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evaluate expressions or return function results. <tt/__AX__/ is of
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type <tt/unsigned int/ and <tt/__EAX__/ of type <tt/long unsigned int/
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type <tt/unsigned int/ and <tt/__EAX__/ of type <tt/long unsigned int/
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@@ -728,26 +728,6 @@ This cc65 version has some extensions to the ISO C standard.
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will give the high byte of any unsigned value.
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will give the high byte of any unsigned value.
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<p>
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<p>
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<item> There is pseudo variable named <tt/__A__/ that indicates accumulator register.
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It can be used to highlight the returned variable in non-void
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function where result is hidden in the <tt/asm/ section.
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For example, in the function below
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<tscreen><verb>
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BYTE get_key_via_atarixl_romcall_device_k(void) \
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asm("LDA $E425"); \
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asm("PHA"); \
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asm("LDA $E424"); \
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asm("PHA"); \
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asm("RTS"); \
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return __A__;
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</verb></tscreen>
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<tt/return __A__;/ will indicate that result is stored in the accumulator
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and suppress warning that function has no return statement. Instead, you can
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also use <tt/#pragma warn (return-type, off) ... pragma warn (return-type, on)/
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<p>
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<item> Inside a function, the identifier <tt/__func__/ gives the name of the
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<item> Inside a function, the identifier <tt/__func__/ gives the name of the
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current function as a string. Outside of functions, <tt/__func__/ is
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current function as a string. Outside of functions, <tt/__func__/ is
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undefined.
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undefined.
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