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| Structure variables with inline asm http://forums.purebasic.com/english/viewtopic.php?f=35&t=68905 |
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| Author: | wilbert [ Tue Aug 08, 2017 2:53 pm ] |
| Post subject: | Structure variables with inline asm |
Is it always valid to use structure variables like this Code: Structure test a.l b.l EndStructure v.test\a = 1 EnableASM mov edx, 1 mov eax, v\a add edx, eax mov v\b, edx DisableASM Debug v\b and if so, which registers are free to use (unaltered by the compiler when it encounters a structure variable) ? |
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| Author: | STARGÅTE [ Tue Aug 08, 2017 5:01 pm ] |
| Post subject: | Re: Structure variables with inline asm |
Quote: - On x86 processors, the available volatile registers are: eax, ecx and edx, xmm0, xmm1, xmm2 and xmm3. All others must be always preserved. http://www.purebasic.com/documentation/reference/inlinedasm.html
- On x64 processors, the available volatile registers are: rax, rcx, rdx, r8, r9, xmm0, xmm1, xmm2 and xmm3. All others must be always preserved. |
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