feat: migrate cpp/language/basic_concepts/as_if #88
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Lancern
reviewed
Dec 21, 2025
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| ``` | ||
| # full code of the main() function as produced by the GCC compiler | ||
| # x86 (Intel) platform: | ||
| movl input(%rip), %eax # eax = input | ||
| leal 3(%rax,%rax), %eax # eax = 3 + eax + eax | ||
| movl %eax, result(%rip) # result = eax | ||
| xorl %eax, %eax # eax = 0 (the return value of main()) | ||
| ret | ||
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| # PowerPC (IBM) platform: | ||
| lwz 9,LC..1(2) | ||
| li 3,0 # r3 = 0 (the return value of main()) | ||
| lwz 11,0(9) # r11 = input; | ||
| slwi 11,11,1 # r11 = r11 << 1; | ||
| addi 0,11,3 # r0 = r11 + 3; | ||
| stw 0,4(9) # result = r0; | ||
| blr | ||
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| # Sparc (Sun) platform: | ||
| sethi %hi(result), %g2 | ||
| sethi %hi(input), %g1 | ||
| mov 0, %o0 # o0 = 0 (the return value of main) | ||
| ld [%g1+%lo(input)], %g1 # g1 = input | ||
| add %g1, %g1, %g1 # g1 = g1 + g1 | ||
| add %g1, 3, %g1 # g1 = 3 + g1 | ||
| st %g1, [%g2+%lo(result)] # result = g1 | ||
| jmp %o7+8 | ||
| nop | ||
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| # in all cases, the side effects of preinc() were eliminated, and the | ||
| # entire main() function was reduced to the equivalent of result = 2 * input + 3; | ||
| ``` |
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Maybe we could split this code block into three tabs and each tab shows the code generated for a specific target platform.
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Maybe we could split this code block into three tabs and each tab shows the code generated for a specific target platform.
It's divided to 3 tabs now.
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