Template:FUNU changes for 7.5: Difference between revisions
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<ul> | <ul> | ||
<li>In order to exploit QTBL above the 2G bar, any $functions which has arguments must be in AMODE 64. The ENTER macro should use ZMODE=GQ (the AMODE will remain as 64) and the code must be changed for proper addressing. | <li>In order to exploit QTBL above the 2G bar, any $functions which has arguments must be in AMODE 64. The ENTER macro should use ZMODE=GQ (the AMODE will remain as 64) and the code must be changed for proper addressing. | ||
<li> | <li>For the ENTER macro, the ZMODE operand default value (for FUNU only) is ZMODE=31. So if the $function does not have any arguments or if you will not exploit QTBL above the bar, and if the $function does not access any data structures above the bar, either specify ZMODE=31 or omit the ZMODE operand. (Note that most Model 204 data structures can be above the bar, including $function arguments.) The ZMODE=31 value will be used, causing your $function to switch to AMODE 31 at entry (and restore the AMODE upon exit). | ||
<li>In any case, the AMODE issues need to be accounted for in any routines which your $function routine does a CCALL to. | <li>In any case, the AMODE issues need to be accounted for in any routines which your $function routine does a CCALL to. | ||
</ul> | </ul> | ||
Latest revision as of 21:43, 5 December 2016
Starting with version 7.5 of Model 204, all $functions are entered in AMODE 64. This requires you to modify the ENTER macro for each $function, and may require you to modify the code for proper addressing in AMODE 64.
- In order to exploit QTBL above the 2G bar, any $functions which has arguments must be in AMODE 64. The ENTER macro should use ZMODE=GQ (the AMODE will remain as 64) and the code must be changed for proper addressing.
- For the ENTER macro, the ZMODE operand default value (for FUNU only) is ZMODE=31. So if the $function does not have any arguments or if you will not exploit QTBL above the bar, and if the $function does not access any data structures above the bar, either specify ZMODE=31 or omit the ZMODE operand. (Note that most Model 204 data structures can be above the bar, including $function arguments.) The ZMODE=31 value will be used, causing your $function to switch to AMODE 31 at entry (and restore the AMODE upon exit).
- In any case, the AMODE issues need to be accounted for in any routines which your $function routine does a CCALL to.