User`s guide

Improving the Performance of Ported Code

4.4 Common-Based Referencing

By using the preﬁx ﬁle method shown in Section 4.4.1, an instruction sequence

with almost half of the memory accesses removed will result:

add r24 = BASE, r1

ld8 r24 = [r24]

mov r23 = r24

ld4 r9 = [r24]

adds r18 = 12, r24

adds r19 = 8, r24

adds r22 = 4, r24

adds r24 = 12, r24

ld4 r4 = [r24], -4

sxt4 r9 = r9

ld4 r3 = [r24], -4

sxt4 r4 = r4

sxt4 r3 = r3

ld4 r28 = [r24], -4

sxt4 r28 = r28

Improving the Performance of Ported Code 4–11