| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| */ |
| .text |
| .balign 0 |
| |
| .global scanline_t32cb16blend_arm64 |
| |
| /* |
| * .macro pixel |
| * |
| * This macro alpha blends RGB565 original pixel located in either |
| * top or bottom 16 bits of DREG register with SRC 32 bit pixel value |
| * and writes the result to FB register |
| * |
| * \DREG is a 32-bit register containing *two* original destination RGB565 |
| * pixels, with the even one in the low-16 bits, and the odd one in the |
| * high 16 bits. |
| * |
| * \SRC is a 32-bit 0xAABBGGRR pixel value, with pre-multiplied colors. |
| * |
| * \FB is a target register that will contain the blended pixel values. |
| * |
| * \ODD is either 0 or 1 and indicates if we're blending the lower or |
| * upper 16-bit pixels in DREG into FB |
| * |
| * |
| * clobbered: w6, w7, w16, w17, w18 |
| * |
| */ |
| |
| .macro pixel, DREG, SRC, FB, ODD |
| |
| // SRC = 0xAABBGGRR |
| lsr w7, \SRC, #24 // sA |
| add w7, w7, w7, lsr #7 // sA + (sA >> 7) |
| mov w6, #0x100 |
| sub w7, w6, w7 // sA = 0x100 - (sA+(sA>>7)) |
| |
| 1: |
| |
| .if \ODD //Blending odd pixel present in top 16 bits of DREG register |
| |
| // red |
| lsr w16, \DREG, #(16 + 11) |
| mul w16, w7, w16 |
| lsr w6, \SRC, #3 |
| and w6, w6, #0x1F |
| add w16, w6, w16, lsr #8 |
| cmp w16, #0x1F |
| orr w17, \FB, #(0x1F<<(16 + 11)) |
| orr w18, \FB, w16, lsl #(16 + 11) |
| csel \FB, w17, w18, hi |
| // green |
| and w6, \DREG, #(0x3F<<(16 + 5)) |
| lsr w17,w6,#(16+5) |
| mul w6, w7, w17 |
| lsr w16, \SRC, #(8+2) |
| and w16, w16, #0x3F |
| add w6, w16, w6, lsr #8 |
| cmp w6, #0x3F |
| orr w17, \FB, #(0x3F<<(16 + 5)) |
| orr w18, \FB, w6, lsl #(16 + 5) |
| csel \FB, w17, w18, hi |
| // blue |
| and w16, \DREG, #(0x1F << 16) |
| lsr w17,w16,#16 |
| mul w16, w7, w17 |
| lsr w6, \SRC, #(8+8+3) |
| and w6, w6, #0x1F |
| add w16, w6, w16, lsr #8 |
| cmp w16, #0x1F |
| orr w17, \FB, #(0x1F << 16) |
| orr w18, \FB, w16, lsl #16 |
| csel \FB, w17, w18, hi |
| |
| .else //Blending even pixel present in bottom 16 bits of DREG register |
| |
| // red |
| lsr w16, \DREG, #11 |
| and w16, w16, #0x1F |
| mul w16, w7, w16 |
| lsr w6, \SRC, #3 |
| and w6, w6, #0x1F |
| add w16, w6, w16, lsr #8 |
| cmp w16, #0x1F |
| mov w17, #(0x1F<<11) |
| lsl w18, w16, #11 |
| csel \FB, w17, w18, hi |
| |
| |
| // green |
| and w6, \DREG, #(0x3F<<5) |
| mul w6, w7, w6 |
| lsr w16, \SRC, #(8+2) |
| and w16, w16, #0x3F |
| add w6, w16, w6, lsr #(5+8) |
| cmp w6, #0x3F |
| orr w17, \FB, #(0x3F<<5) |
| orr w18, \FB, w6, lsl #5 |
| csel \FB, w17, w18, hi |
| |
| // blue |
| and w16, \DREG, #0x1F |
| mul w16, w7, w16 |
| lsr w6, \SRC, #(8+8+3) |
| and w6, w6, #0x1F |
| add w16, w6, w16, lsr #8 |
| cmp w16, #0x1F |
| orr w17, \FB, #0x1F |
| orr w18, \FB, w16 |
| csel \FB, w17, w18, hi |
| |
| .endif // End of blending even pixel |
| |
| .endm // End of pixel macro |
| |
| |
| // x0: dst ptr |
| // x1: src ptr |
| // w2: count |
| // w3: d |
| // w4: s0 |
| // w5: s1 |
| // w6: pixel |
| // w7: pixel |
| // w8: free |
| // w9: free |
| // w10: free |
| // w11: free |
| // w12: scratch |
| // w14: pixel |
| |
| scanline_t32cb16blend_arm64: |
| |
| // align DST to 32 bits |
| tst x0, #0x3 |
| b.eq aligned |
| subs w2, w2, #1 |
| b.lo return |
| |
| last: |
| ldr w4, [x1], #4 |
| ldrh w3, [x0] |
| pixel w3, w4, w12, 0 |
| strh w12, [x0], #2 |
| |
| aligned: |
| subs w2, w2, #2 |
| b.lo 9f |
| |
| // The main loop is unrolled twice and processes 4 pixels |
| 8: |
| ldp w4,w5, [x1], #8 |
| add x0, x0, #4 |
| // it's all zero, skip this pixel |
| orr w3, w4, w5 |
| cbz w3, 7f |
| |
| // load the destination |
| ldr w3, [x0, #-4] |
| // stream the destination |
| pixel w3, w4, w12, 0 |
| pixel w3, w5, w12, 1 |
| str w12, [x0, #-4] |
| |
| // 2nd iteration of the loop, don't stream anything |
| subs w2, w2, #2 |
| csel w4, w5, w4, lt |
| blt 9f |
| ldp w4,w5, [x1], #8 |
| add x0, x0, #4 |
| orr w3, w4, w5 |
| cbz w3, 7f |
| ldr w3, [x0, #-4] |
| pixel w3, w4, w12, 0 |
| pixel w3, w5, w12, 1 |
| str w12, [x0, #-4] |
| |
| 7: subs w2, w2, #2 |
| bhs 8b |
| mov w4, w5 |
| |
| 9: adds w2, w2, #1 |
| b.lo return |
| b last |
| |
| return: |
| ret |
