| /* |
| * Copyright © 2018, VideoLAN and dav1d authors |
| * Copyright © 2018, Martin Storsjo |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR |
| * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "src/arm/asm.S" |
| |
| // void dav1d_wiener_filter_h_neon(int16_t *dst, const pixel (*left)[4], |
| // const pixel *src, ptrdiff_t stride, |
| // const int16_t fh[7], const intptr_t w, |
| // int h, enum LrEdgeFlags edges); |
| function wiener_filter_h_neon, export=1 |
| mov w8, w5 |
| ld1 {v0.8h}, [x4] |
| mov w9, #(1 << 14) - (1 << 2) |
| dup v30.8h, w9 |
| movi v31.8h, #8, lsl #8 |
| // Calculate mid_stride |
| add w10, w5, #7 |
| bic w10, w10, #7 |
| lsl w10, w10, #1 |
| |
| // Clear the last unused element of v0, to allow filtering a single |
| // pixel with one plain mul+addv. |
| ins v0.h[7], wzr |
| |
| // Set up pointers for reading/writing alternate rows |
| add x12, x0, x10 |
| lsl w10, w10, #1 |
| add x13, x2, x3 |
| lsl x3, x3, #1 |
| |
| // Subtract the width from mid_stride |
| sub x10, x10, w5, uxtw #1 |
| |
| // For w >= 8, we read (w+5)&~7+8 pixels, for w < 8 we read 16 pixels. |
| cmp w5, #8 |
| add w11, w5, #13 |
| bic w11, w11, #7 |
| b.ge 1f |
| mov w11, #16 |
| 1: |
| sub x3, x3, w11, uxtw |
| |
| // Set up the src pointers to include the left edge, for LR_HAVE_LEFT, left == NULL |
| tst w7, #1 // LR_HAVE_LEFT |
| b.eq 2f |
| // LR_HAVE_LEFT |
| cbnz x1, 0f |
| // left == NULL |
| sub x2, x2, #3 |
| sub x13, x13, #3 |
| b 1f |
| 0: // LR_HAVE_LEFT, left != NULL |
| 2: // !LR_HAVE_LEFT, increase the stride. |
| // For this case we don't read the left 3 pixels from the src pointer, |
| // but shift it as if we had done that. |
| add x3, x3, #3 |
| |
| |
| 1: // Loop vertically |
| ld1 {v3.16b}, [x2], #16 |
| ld1 {v5.16b}, [x13], #16 |
| |
| tst w7, #1 // LR_HAVE_LEFT |
| b.eq 0f |
| cbz x1, 2f |
| // LR_HAVE_LEFT, left != NULL |
| ld1 {v2.s}[3], [x1], #4 |
| // Move x2/x13 back to account for the last 3 bytes we loaded earlier, |
| // which we'll shift out. |
| sub x2, x2, #3 |
| sub x13, x13, #3 |
| ld1 {v4.s}[3], [x1], #4 |
| ext v3.16b, v2.16b, v3.16b, #13 |
| ext v5.16b, v4.16b, v5.16b, #13 |
| b 2f |
| 0: |
| // !LR_HAVE_LEFT, fill v2 with the leftmost byte |
| // and shift v3 to have 3x the first byte at the front. |
| dup v2.16b, v3.b[0] |
| dup v4.16b, v5.b[0] |
| // Move x2 back to account for the last 3 bytes we loaded before, |
| // which we shifted out. |
| sub x2, x2, #3 |
| sub x13, x13, #3 |
| ext v3.16b, v2.16b, v3.16b, #13 |
| ext v5.16b, v4.16b, v5.16b, #13 |
| |
| 2: |
| uxtl v2.8h, v3.8b |
| uxtl2 v3.8h, v3.16b |
| uxtl v4.8h, v5.8b |
| uxtl2 v5.8h, v5.16b |
| |
| tst w7, #2 // LR_HAVE_RIGHT |
| b.ne 4f |
| // If we'll need to pad the right edge, load that byte to pad with |
| // here since we can find it pretty easily from here. |
| sub w9, w5, #14 |
| ldr b28, [x2, w9, sxtw] |
| ldr b29, [x13, w9, sxtw] |
| // Fill v28/v29 with the right padding pixel |
| dup v28.8b, v28.b[0] |
| dup v29.8b, v29.b[0] |
| uxtl v28.8h, v28.8b |
| uxtl v29.8h, v29.8b |
| 3: // !LR_HAVE_RIGHT |
| // If we'll have to pad the right edge we need to quit early here. |
| cmp w5, #11 |
| b.ge 4f // If w >= 11, all used input pixels are valid |
| cmp w5, #7 |
| b.ge 5f // If w >= 7, we can filter 4 pixels |
| b 6f |
| |
| 4: // Loop horizontally |
| .macro filter wd |
| // Interleaving the mul/mla chains actually hurts performance |
| // significantly on Cortex A53, thus keeping mul/mla tightly |
| // chained like this. |
| ext v16.16b, v2.16b, v3.16b, #2 |
| ext v17.16b, v2.16b, v3.16b, #4 |
| ext v18.16b, v2.16b, v3.16b, #6 |
| ext v19.16b, v2.16b, v3.16b, #8 |
| ext v20.16b, v2.16b, v3.16b, #10 |
| ext v21.16b, v2.16b, v3.16b, #12 |
| mul v6\wd, v2\wd, v0.h[0] |
| mla v6\wd, v16\wd, v0.h[1] |
| mla v6\wd, v17\wd, v0.h[2] |
| mla v6\wd, v18\wd, v0.h[3] |
| mla v6\wd, v19\wd, v0.h[4] |
| mla v6\wd, v20\wd, v0.h[5] |
| mla v6\wd, v21\wd, v0.h[6] |
| ext v22.16b, v4.16b, v5.16b, #2 |
| ext v23.16b, v4.16b, v5.16b, #4 |
| ext v24.16b, v4.16b, v5.16b, #6 |
| ext v25.16b, v4.16b, v5.16b, #8 |
| ext v26.16b, v4.16b, v5.16b, #10 |
| ext v27.16b, v4.16b, v5.16b, #12 |
| mul v7\wd, v4\wd, v0.h[0] |
| mla v7\wd, v22\wd, v0.h[1] |
| mla v7\wd, v23\wd, v0.h[2] |
| mla v7\wd, v24\wd, v0.h[3] |
| mla v7\wd, v25\wd, v0.h[4] |
| mla v7\wd, v26\wd, v0.h[5] |
| mla v7\wd, v27\wd, v0.h[6] |
| |
| shl v18\wd, v18\wd, #7 |
| shl v24\wd, v24\wd, #7 |
| sub v18\wd, v18\wd, v30\wd |
| sub v24\wd, v24\wd, v30\wd |
| sqadd v6\wd, v6\wd, v18\wd |
| sqadd v7\wd, v7\wd, v24\wd |
| sshr v6\wd, v6\wd, #3 |
| sshr v7\wd, v7\wd, #3 |
| add v6\wd, v6\wd, v31\wd |
| add v7\wd, v7\wd, v31\wd |
| .endm |
| filter .8h |
| st1 {v6.8h}, [x0], #16 |
| st1 {v7.8h}, [x12], #16 |
| |
| subs w5, w5, #8 |
| b.le 9f |
| tst w7, #2 // LR_HAVE_RIGHT |
| mov v2.16b, v3.16b |
| mov v4.16b, v5.16b |
| ld1 {v3.8b}, [x2], #8 |
| ld1 {v5.8b}, [x13], #8 |
| uxtl v3.8h, v3.8b |
| uxtl v5.8h, v5.8b |
| b.ne 4b // If we don't need to pad, just keep filtering. |
| b 3b // If we need to pad, check how many pixels we have left. |
| |
| 5: // Filter 4 pixels, 7 <= w < 11 |
| filter .4h |
| st1 {v6.4h}, [x0], #8 |
| st1 {v7.4h}, [x12], #8 |
| |
| subs w5, w5, #4 // 3 <= w < 7 |
| ext v2.16b, v2.16b, v3.16b, #8 |
| ext v3.16b, v3.16b, v3.16b, #8 |
| ext v4.16b, v4.16b, v5.16b, #8 |
| ext v5.16b, v5.16b, v5.16b, #8 |
| |
| 6: // Pad the right edge and filter the last few pixels. |
| // w < 7, w+3 pixels valid in v2-v3 |
| cmp w5, #5 |
| b.lt 7f |
| b.gt 8f |
| // w == 5, 8 pixels valid in v2, v3 invalid |
| mov v3.16b, v28.16b |
| mov v5.16b, v29.16b |
| b 88f |
| |
| 7: // 1 <= w < 5, 4-7 pixels valid in v2 |
| sub w9, w5, #1 |
| // w9 = (pixels valid - 4) |
| adr x11, L(variable_shift_tbl) |
| ldrh w9, [x11, w9, uxtw #1] |
| sub x11, x11, w9, uxth |
| mov v3.16b, v28.16b |
| mov v5.16b, v29.16b |
| br x11 |
| // Shift v2 right, shifting out invalid pixels, |
| // shift v2 left to the original offset, shifting in padding pixels. |
| 44: // 4 pixels valid |
| ext v2.16b, v2.16b, v2.16b, #8 |
| ext v2.16b, v2.16b, v3.16b, #8 |
| ext v4.16b, v4.16b, v4.16b, #8 |
| ext v4.16b, v4.16b, v5.16b, #8 |
| b 88f |
| 55: // 5 pixels valid |
| ext v2.16b, v2.16b, v2.16b, #10 |
| ext v2.16b, v2.16b, v3.16b, #6 |
| ext v4.16b, v4.16b, v4.16b, #10 |
| ext v4.16b, v4.16b, v5.16b, #6 |
| b 88f |
| 66: // 6 pixels valid |
| ext v2.16b, v2.16b, v2.16b, #12 |
| ext v2.16b, v2.16b, v3.16b, #4 |
| ext v4.16b, v4.16b, v4.16b, #12 |
| ext v4.16b, v4.16b, v5.16b, #4 |
| b 88f |
| 77: // 7 pixels valid |
| ext v2.16b, v2.16b, v2.16b, #14 |
| ext v2.16b, v2.16b, v3.16b, #2 |
| ext v4.16b, v4.16b, v4.16b, #14 |
| ext v4.16b, v4.16b, v5.16b, #2 |
| b 88f |
| |
| L(variable_shift_tbl): |
| .hword L(variable_shift_tbl) - 44b |
| .hword L(variable_shift_tbl) - 55b |
| .hword L(variable_shift_tbl) - 66b |
| .hword L(variable_shift_tbl) - 77b |
| |
| 8: // w > 5, w == 6, 9 pixels valid in v2-v3, 1 pixel valid in v3 |
| ins v28.h[0], v3.h[0] |
| ins v29.h[0], v5.h[0] |
| mov v3.16b, v28.16b |
| mov v5.16b, v29.16b |
| |
| 88: |
| // w < 7, v2-v3 padded properly |
| cmp w5, #4 |
| b.lt 888f |
| |
| // w >= 4, filter 4 pixels |
| filter .4h |
| st1 {v6.4h}, [x0], #8 |
| st1 {v7.4h}, [x12], #8 |
| subs w5, w5, #4 // 0 <= w < 4 |
| ext v2.16b, v2.16b, v3.16b, #8 |
| ext v4.16b, v4.16b, v5.16b, #8 |
| b.eq 9f |
| 888: // 1 <= w < 4, filter 1 pixel at a time |
| mul v6.8h, v2.8h, v0.8h |
| mul v7.8h, v4.8h, v0.8h |
| addv h6, v6.8h |
| addv h7, v7.8h |
| dup v16.4h, v2.h[3] |
| dup v17.4h, v4.h[3] |
| shl v16.4h, v16.4h, #7 |
| shl v17.4h, v17.4h, #7 |
| sub v16.4h, v16.4h, v30.4h |
| sub v17.4h, v17.4h, v30.4h |
| sqadd v6.4h, v6.4h, v16.4h |
| sqadd v7.4h, v7.4h, v17.4h |
| sshr v6.4h, v6.4h, #3 |
| sshr v7.4h, v7.4h, #3 |
| add v6.4h, v6.4h, v31.4h |
| add v7.4h, v7.4h, v31.4h |
| st1 {v6.h}[0], [x0], #2 |
| st1 {v7.h}[0], [x12], #2 |
| subs w5, w5, #1 |
| ext v2.16b, v2.16b, v3.16b, #2 |
| ext v4.16b, v4.16b, v5.16b, #2 |
| b.gt 888b |
| |
| 9: |
| subs w6, w6, #2 |
| b.le 0f |
| // Jump to the next row and loop horizontally |
| add x0, x0, x10 |
| add x12, x12, x10 |
| add x2, x2, x3 |
| add x13, x13, x3 |
| mov w5, w8 |
| b 1b |
| 0: |
| ret |
| .purgem filter |
| endfunc |
| |
| // void dav1d_wiener_filter_v_neon(pixel *dst, ptrdiff_t stride, |
| // const int16_t *mid, int w, int h, |
| // const int16_t fv[7], enum LrEdgeFlags edges, |
| // ptrdiff_t mid_stride); |
| function wiener_filter_v_neon, export=1 |
| mov w8, w4 |
| ld1 {v0.8h}, [x5] |
| movi v1.8h, #128 |
| add v1.8h, v1.8h, v0.8h |
| |
| // Calculate the number of rows to move back when looping vertically |
| mov w11, w4 |
| tst w6, #4 // LR_HAVE_TOP |
| b.eq 0f |
| sub x2, x2, x7, lsl #1 |
| add w11, w11, #2 |
| 0: |
| tst w6, #8 // LR_HAVE_BOTTOM |
| b.eq 1f |
| add w11, w11, #2 |
| |
| 1: // Start of horizontal loop; start one vertical filter slice. |
| // Load rows into v16-v19 and pad properly. |
| tst w6, #4 // LR_HAVE_TOP |
| ld1 {v16.8h}, [x2], x7 |
| b.eq 2f |
| // LR_HAVE_TOP |
| ld1 {v18.8h}, [x2], x7 |
| mov v17.16b, v16.16b |
| ld1 {v19.8h}, [x2], x7 |
| b 3f |
| 2: // !LR_HAVE_TOP |
| mov v17.16b, v16.16b |
| mov v18.16b, v16.16b |
| mov v19.16b, v16.16b |
| |
| 3: |
| cmp w4, #4 |
| b.lt 5f |
| // Start filtering normally; fill in v20-v22 with unique rows. |
| ld1 {v20.8h}, [x2], x7 |
| ld1 {v21.8h}, [x2], x7 |
| ld1 {v22.8h}, [x2], x7 |
| |
| 4: |
| .macro filter compare |
| subs w4, w4, #1 |
| // Interleaving the mul/mla chains actually hurts performance |
| // significantly on Cortex A53, thus keeping mul/mla tightly |
| // chained like this. |
| smull v2.4s, v16.4h, v0.h[0] |
| smlal v2.4s, v17.4h, v0.h[1] |
| smlal v2.4s, v18.4h, v0.h[2] |
| smlal v2.4s, v19.4h, v1.h[3] |
| smlal v2.4s, v20.4h, v0.h[4] |
| smlal v2.4s, v21.4h, v0.h[5] |
| smlal v2.4s, v22.4h, v0.h[6] |
| smull2 v3.4s, v16.8h, v0.h[0] |
| smlal2 v3.4s, v17.8h, v0.h[1] |
| smlal2 v3.4s, v18.8h, v0.h[2] |
| smlal2 v3.4s, v19.8h, v1.h[3] |
| smlal2 v3.4s, v20.8h, v0.h[4] |
| smlal2 v3.4s, v21.8h, v0.h[5] |
| smlal2 v3.4s, v22.8h, v0.h[6] |
| sqrshrun v2.4h, v2.4s, #11 |
| sqrshrun2 v2.8h, v3.4s, #11 |
| sqxtun v2.8b, v2.8h |
| st1 {v2.8b}, [x0], x1 |
| .if \compare |
| cmp w4, #4 |
| .else |
| b.le 9f |
| .endif |
| mov v16.16b, v17.16b |
| mov v17.16b, v18.16b |
| mov v18.16b, v19.16b |
| mov v19.16b, v20.16b |
| mov v20.16b, v21.16b |
| mov v21.16b, v22.16b |
| .endm |
| filter 1 |
| b.lt 7f |
| ld1 {v22.8h}, [x2], x7 |
| b 4b |
| |
| 5: // Less than 4 rows in total; not all of v20-v21 are filled yet. |
| tst w6, #8 // LR_HAVE_BOTTOM |
| b.eq 6f |
| // LR_HAVE_BOTTOM |
| cmp w4, #2 |
| // We load at least 2 rows in all cases. |
| ld1 {v20.8h}, [x2], x7 |
| ld1 {v21.8h}, [x2], x7 |
| b.gt 53f // 3 rows in total |
| b.eq 52f // 2 rows in total |
| 51: // 1 row in total, v19 already loaded, load edge into v20-v22. |
| mov v22.16b, v21.16b |
| b 8f |
| 52: // 2 rows in total, v19 already loaded, load v20 with content data |
| // and 2 rows of edge. |
| ld1 {v22.8h}, [x2], x7 |
| mov v23.16b, v22.16b |
| b 8f |
| 53: |
| // 3 rows in total, v19 already loaded, load v20 and v21 with content |
| // and 2 rows of edge. |
| ld1 {v22.8h}, [x2], x7 |
| ld1 {v23.8h}, [x2], x7 |
| mov v24.16b, v23.16b |
| b 8f |
| |
| 6: |
| // !LR_HAVE_BOTTOM |
| cmp w4, #2 |
| b.gt 63f // 3 rows in total |
| b.eq 62f // 2 rows in total |
| 61: // 1 row in total, v19 already loaded, pad that into v20-v22. |
| mov v20.16b, v19.16b |
| mov v21.16b, v19.16b |
| mov v22.16b, v19.16b |
| b 8f |
| 62: // 2 rows in total, v19 already loaded, load v20 and pad that into v21-v23. |
| ld1 {v20.8h}, [x2], x7 |
| mov v21.16b, v20.16b |
| mov v22.16b, v20.16b |
| mov v23.16b, v20.16b |
| b 8f |
| 63: |
| // 3 rows in total, v19 already loaded, load v20 and v21 and pad v21 into v22-v24. |
| ld1 {v20.8h}, [x2], x7 |
| ld1 {v21.8h}, [x2], x7 |
| mov v22.16b, v21.16b |
| mov v23.16b, v21.16b |
| mov v24.16b, v21.16b |
| b 8f |
| |
| 7: |
| // All registers up to v21 are filled already, 3 valid rows left. |
| // < 4 valid rows left; fill in padding and filter the last |
| // few rows. |
| tst w6, #8 // LR_HAVE_BOTTOM |
| b.eq 71f |
| // LR_HAVE_BOTTOM; load 2 rows of edge. |
| ld1 {v22.8h}, [x2], x7 |
| ld1 {v23.8h}, [x2], x7 |
| mov v24.16b, v23.16b |
| b 8f |
| 71: |
| // !LR_HAVE_BOTTOM, pad 3 rows |
| mov v22.16b, v21.16b |
| mov v23.16b, v21.16b |
| mov v24.16b, v21.16b |
| |
| 8: // At this point, all registers up to v22-v24 are loaded with |
| // edge/padding (depending on how many rows are left). |
| filter 0 // This branches to 9f when done |
| mov v22.16b, v23.16b |
| mov v23.16b, v24.16b |
| b 8b |
| |
| 9: // End of one vertical slice. |
| subs w3, w3, #8 |
| b.le 0f |
| // Move pointers back up to the top and loop horizontally. |
| msub x0, x1, x8, x0 |
| msub x2, x7, x11, x2 |
| add x0, x0, #8 |
| add x2, x2, #16 |
| mov w4, w8 |
| b 1b |
| |
| 0: |
| ret |
| .purgem filter |
| endfunc |
| |
| // void dav1d_copy_narrow_neon(pixel *dst, ptrdiff_t stride, |
| // const pixel *src, int w, int h); |
| function copy_narrow_neon, export=1 |
| adr x5, L(copy_narrow_tbl) |
| ldrh w6, [x5, w3, uxtw #1] |
| sub x5, x5, w6, uxth |
| br x5 |
| 10: |
| add x7, x0, x1 |
| lsl x1, x1, #1 |
| 18: |
| cmp w4, #8 |
| b.lt 110f |
| subs w4, w4, #8 |
| ld1 {v0.8b}, [x2], #8 |
| st1 {v0.b}[0], [x0], x1 |
| st1 {v0.b}[1], [x7], x1 |
| st1 {v0.b}[2], [x0], x1 |
| st1 {v0.b}[3], [x7], x1 |
| st1 {v0.b}[4], [x0], x1 |
| st1 {v0.b}[5], [x7], x1 |
| st1 {v0.b}[6], [x0], x1 |
| st1 {v0.b}[7], [x7], x1 |
| b.le 0f |
| b 18b |
| 110: |
| asr x1, x1, #1 |
| 11: |
| subs w4, w4, #1 |
| ld1 {v0.b}[0], [x2], #1 |
| st1 {v0.b}[0], [x0], x1 |
| b.gt 11b |
| 0: |
| ret |
| |
| 20: |
| add x7, x0, x1 |
| lsl x1, x1, #1 |
| 24: |
| cmp w4, #4 |
| b.lt 210f |
| subs w4, w4, #4 |
| ld1 {v0.4h}, [x2], #8 |
| st1 {v0.h}[0], [x0], x1 |
| st1 {v0.h}[1], [x7], x1 |
| st1 {v0.h}[2], [x0], x1 |
| st1 {v0.h}[3], [x7], x1 |
| b.le 0f |
| b 24b |
| 210: |
| asr x1, x1, #1 |
| 22: |
| subs w4, w4, #1 |
| ld1 {v0.h}[0], [x2], #2 |
| st1 {v0.h}[0], [x0], x1 |
| b.gt 22b |
| 0: |
| ret |
| |
| 30: |
| ldrh w5, [x2] |
| ldrb w6, [x2, #2] |
| add x2, x2, #3 |
| subs w4, w4, #1 |
| strh w5, [x0] |
| strb w6, [x0, #2] |
| add x0, x0, x1 |
| b.gt 30b |
| ret |
| |
| 40: |
| add x7, x0, x1 |
| lsl x1, x1, #1 |
| 42: |
| cmp w4, #2 |
| b.lt 41f |
| subs w4, w4, #2 |
| ld1 {v0.2s}, [x2], #8 |
| st1 {v0.s}[0], [x0], x1 |
| st1 {v0.s}[1], [x7], x1 |
| b.le 0f |
| b 42b |
| 41: |
| ld1 {v0.s}[0], [x2] |
| st1 {v0.s}[0], [x0] |
| 0: |
| ret |
| |
| 50: |
| ldr w5, [x2] |
| ldrb w6, [x2, #4] |
| add x2, x2, #5 |
| subs w4, w4, #1 |
| str w5, [x0] |
| strb w6, [x0, #4] |
| add x0, x0, x1 |
| b.gt 50b |
| ret |
| |
| 60: |
| ldr w5, [x2] |
| ldrh w6, [x2, #4] |
| add x2, x2, #6 |
| subs w4, w4, #1 |
| str w5, [x0] |
| strh w6, [x0, #4] |
| add x0, x0, x1 |
| b.gt 60b |
| ret |
| |
| 70: |
| ldr w5, [x2] |
| ldrh w6, [x2, #4] |
| ldrb w7, [x2, #6] |
| add x2, x2, #7 |
| subs w4, w4, #1 |
| str w5, [x0] |
| strh w6, [x0, #4] |
| strb w7, [x0, #6] |
| add x0, x0, x1 |
| b.gt 70b |
| ret |
| |
| L(copy_narrow_tbl): |
| .hword 0 |
| .hword L(copy_narrow_tbl) - 10b |
| .hword L(copy_narrow_tbl) - 20b |
| .hword L(copy_narrow_tbl) - 30b |
| .hword L(copy_narrow_tbl) - 40b |
| .hword L(copy_narrow_tbl) - 50b |
| .hword L(copy_narrow_tbl) - 60b |
| .hword L(copy_narrow_tbl) - 70b |
| endfunc |
