James Hogan | 086e9dc | 2012-10-05 17:02:09 +0100 | [diff] [blame] | 1 | ! Copyright (C) 2012 by Imagination Technologies Ltd. |
| 2 | ! |
| 3 | ! 64-bit unsigned compare routine. |
| 4 | ! |
| 5 | |
| 6 | .text |
| 7 | .global ___ucmpdi2 |
| 8 | .type ___ucmpdi2,function |
| 9 | |
| 10 | ! low high |
| 11 | ! u64 a (D0Ar2, D1Ar1) |
| 12 | ! u64 b (D0Ar4, D1Ar3) |
| 13 | ___ucmpdi2: |
| 14 | ! start at 1 (equal) and conditionally increment or decrement |
| 15 | MOV D0Re0,#1 |
| 16 | |
| 17 | ! high words |
| 18 | CMP D1Ar1,D1Ar3 |
| 19 | ! or if equal, low words |
| 20 | CMPEQ D0Ar2,D0Ar4 |
| 21 | |
| 22 | ! unsigned compare |
| 23 | SUBLO D0Re0,D0Re0,#1 |
| 24 | ADDHI D0Re0,D0Re0,#1 |
| 25 | |
| 26 | MOV PC,D1RtP |
| 27 | .size ___ucmpdi2,.-___ucmpdi2 |