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1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2011 |
3 | * |
4 | * This work is licensed under the terms of any of these licenses |
5 | * (at your option): |
6 | * - GNU GPL, version 2 or later. |
7 | * - GNU LGPL, version 2.1 or later. |
8 | * See the COPYING file in the top-level directory. |
9 | */ |
10 | |
11 | /* .equiv HAVE_ARMV7, 1 */ |
12 | |
13 | .text |
14 | .align 2 |
15 | |
16 | .macro sgnxt16 reg |
17 | .if HAVE_ARMV7 |
18 | sxth \reg, \reg |
19 | .else |
20 | lsl \reg, \reg, #16 |
21 | asr \reg, \reg, #16 |
22 | .endif |
23 | .endm |
24 | |
25 | |
26 | .global gteNCLIP_arm @ r0=CP2 (d,c), |
27 | gteNCLIP_arm: |
28 | push {r4-r6,lr} |
29 | |
30 | add r1, r0, #4*12 |
31 | ldmia r1, {r1-r3} |
32 | mov r4, r1, asr #16 |
33 | mov r5, r2, asr #16 |
34 | mov r6, r3, asr #16 |
35 | sub r12, r4, r5 @ 3: gteSY0 - gteSY1 |
36 | sub r5, r5, r6 @ 1: gteSY1 - gteSY2 |
37 | sgnxt16 r1 |
38 | smull r1, r5, r1, r5 @ RdLo, RdHi |
39 | sub r6, r4 @ 2: gteSY2 - gteSY0 |
40 | sgnxt16 r2 |
41 | smlal r1, r5, r2, r6 |
42 | mov lr, #0 @ gteFLAG |
43 | sgnxt16 r3 |
44 | smlal r1, r5, r3, r12 |
45 | mov r6, #1<<31 |
46 | orr r6, #1<<15 |
47 | movs r2, r1, lsl #1 |
48 | adc r5, r5 |
49 | cmp r5, #0 |
50 | .if HAVE_ARMV7 |
51 | movtgt lr, #((1<<31)|(1<<16))>>16 |
52 | .else |
53 | movgt lr, #(1<<31) |
54 | orrgt lr, #(1<<16) |
55 | .endif |
56 | mvngt r1, #1<<31 @ maxint |
57 | cmn r5, #1 |
58 | movmi r1, #1<<31 @ minint |
59 | orrmi lr, r6 |
60 | str r1, [r0, #4*24] |
61 | str lr, [r0, #4*(32+31)] @ gteFLAG |
62 | |
63 | pop {r4-r6,pc} |
64 | .size gteNCLIP_arm, .-gteNCLIP_arm |
65 | |
66 | |
67 | @ vim:filetype=armasm |
68 | |