Created
May 7, 2015 03:17
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ARM assembly population count using NEON instructions. compile with: gcc -mfpu=neon pop_count.s
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| .text | |
| .global main | |
| main: | |
| ldr r0, =value | |
| ldr r0, [r0] | |
| vmov.32 d0[0], r0 | |
| vcnt.8 d0, d0 | |
| vmov.32 r0, d0[0] | |
| add r0, r0, r0, lsr #16 | |
| add r0, r0, r0, lsr #8 | |
| and r0, r0, #31 | |
| mov r1, r0 | |
| ldr r0, =numberFormat | |
| bl printf | |
| mov r7, #1 | |
| swi 0 | |
| .data | |
| numberFormat: .asciz "%d\n" | |
| value: .word 123456 | |
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