| 1 | /* |
| 2 | * (C) GraÅžvydas "notaz" Ignotas, 2010 |
| 3 | * |
| 4 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 5 | * See the COPYING file in the top-level directory. |
| 6 | */ |
| 7 | |
| 8 | .text |
| 9 | .align 2 |
| 10 | |
| 11 | .global bgr555_to_rgb565 |
| 12 | bgr555_to_rgb565: |
| 13 | mov r3, #0x03e0 |
| 14 | vdup.16 q15, r3 |
| 15 | mov r2, r2, lsr #6 |
| 16 | 0: |
| 17 | vldmia r1!, {q0-q3} |
| 18 | vshr.u16 q4, q0, #10 |
| 19 | vshr.u16 q5, q1, #10 |
| 20 | vshr.u16 q6, q2, #10 |
| 21 | vshr.u16 q7, q3, #10 |
| 22 | vshl.u16 q8, q0, #11 |
| 23 | vshl.u16 q9, q1, #11 |
| 24 | vshl.u16 q10, q2, #11 |
| 25 | vshl.u16 q11, q3, #11 |
| 26 | vand q0, q0, q15 |
| 27 | vand q1, q1, q15 |
| 28 | vand q2, q2, q15 |
| 29 | vand q3, q3, q15 |
| 30 | vshl.u16 q0, q0, #1 |
| 31 | vshl.u16 q1, q1, #1 |
| 32 | vshl.u16 q2, q2, #1 |
| 33 | vshl.u16 q3, q3, #1 |
| 34 | vorr q0, q0, q4 |
| 35 | vorr q1, q1, q5 |
| 36 | vorr q2, q2, q6 |
| 37 | vorr q3, q3, q7 |
| 38 | vorr q0, q0, q8 |
| 39 | vorr q1, q1, q9 |
| 40 | vorr q2, q2, q10 |
| 41 | vorr q3, q3, q11 |
| 42 | vstmia r0!, {q0-q3} |
| 43 | subs r2, r2, #1 |
| 44 | bne 0b |
| 45 | |
| 46 | bx lr |
| 47 | |
| 48 | |
| 49 | .global bgr888_to_rgb888 |
| 50 | bgr888_to_rgb888: |
| 51 | @ r2 /= 48 |
| 52 | mov r2, r2, lsr #4 |
| 53 | movw r3, #0x5556 |
| 54 | movt r3, #0x5555 |
| 55 | umull r12,r2, r3, r2 |
| 56 | 0: |
| 57 | vld3.8 {d0-d2}, [r1, :64]! |
| 58 | vld3.8 {d3-d5}, [r1, :64]! |
| 59 | vswp d0, d2 |
| 60 | vswp d3, d5 |
| 61 | vst3.8 {d0-d2}, [r0, :64]! |
| 62 | vst3.8 {d3-d5}, [r0, :64]! |
| 63 | subs r2, r2, #1 |
| 64 | bne 0b |
| 65 | |
| 66 | bx lr |
| 67 | |
| 68 | |
| 69 | @ vim:filetype=armasm |