MOVD ivlo+32(FP), IV_LOW_LE MOVD ivhi+40(FP), IV_HIGH_LE {{/* Prepare plain from IV and blockIndex. */}} {{/* Copy to plaintext registers. */}} {{ range $i := xrange $N }} REV IV_LOW_LE, IV_LOW_BE REV IV_HIGH_LE, IV_HIGH_BE {{- /* https://developer.arm.com/documentation/dui0801/g/A64-SIMD-Vector-Instructions/MOV--vector--from-general- */}} VMOV IV_LOW_BE, V{{ block_reg $i }}.D[1] VMOV IV_HIGH_BE, V{{ block_reg $i }}.D[0] {{- if ne (add $i 1) $N }} ADDS $1, IV_LOW_LE ADC $0, IV_HIGH_LE {{ end }} {{...