Timeline for Evaluate left-or-right
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
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| Feb 6, 2021 at 2:43 | comment | added | user99151 | @640KB Hopefully fixed. | |
| Feb 6, 2021 at 2:40 | history | edited | user99151 | CC BY-SA 4.0 |
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| Feb 5, 2021 at 17:47 | comment | added | 640KB |
Hmm now I see what you mean about output at top of the stack. Unfortunately I don't think this is okay by the rules since you're now leaving things on the stack and SP not preserved - that RET will not actually return to caller. Specifically ESP/RSP must be call-preserved and x87 st0 is reasonable, but returning in st3 with garbage in other x87 register isn't. The caller would have to clean up the x87 stack. If it's too costly to unwind the stack in the code, maybe save SP in the beginning and restore SP at the end?
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| Feb 5, 2021 at 10:13 | history | edited | user99151 | CC BY-SA 4.0 |
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| Feb 5, 2021 at 10:05 | history | edited | user99151 | CC BY-SA 4.0 |
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| Feb 5, 2021 at 8:04 | history | edited | user99151 | CC BY-SA 4.0 |
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| Feb 5, 2021 at 8:00 | comment | added | user99151 | @Bubbler You're right! Silly me. :) | |
| Feb 5, 2021 at 7:59 | comment | added | Bubbler |
Good old stack-based expression evaluation, in one loop. Btw, can't you change ADD SP,2 to, say, POP BX?
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| Feb 5, 2021 at 7:16 | history | edited | user99151 | CC BY-SA 4.0 |
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| Feb 5, 2021 at 7:11 | history | edited | user99151 | CC BY-SA 4.0 |
added 260 characters in body
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| Feb 5, 2021 at 7:05 | history | edited | user99151 | CC BY-SA 4.0 |
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| Feb 5, 2021 at 6:58 | history | undeleted | user99151 | ||
| Feb 5, 2021 at 6:57 | history | deleted | user99151 | via Vote | |
| Feb 5, 2021 at 6:57 | history | answered | user99151 | CC BY-SA 4.0 |