| /* |
| * Alpha optimized IDCT-related routines |
| * Copyright (c) 2002 Falk Hueffner <falk@debian.org> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * These functions are scheduled for pca56. They should work |
| * reasonably on ev6, though. |
| */ |
| |
| #include "regdef.h" |
| |
| .set noat |
| .set noreorder |
| .arch pca56 |
| .text |
| |
| /************************************************************************ |
| * void put_pixels_clamped_mvi_asm(const int16_t *block, uint8_t *pixels, |
| * ptrdiff_t line_size) |
| */ |
| .align 6 |
| .globl put_pixels_clamped_mvi_asm |
| .ent put_pixels_clamped_mvi_asm |
| put_pixels_clamped_mvi_asm: |
| .frame sp, 0, ra |
| .prologue 0 |
| |
| lda t8, -1 |
| lda t9, 8 # loop counter |
| zap t8, 0xaa, t8 # 00ff00ff00ff00ff |
| |
| .align 4 |
| 1: ldq t0, 0(a0) |
| ldq t1, 8(a0) |
| ldq t2, 16(a0) |
| ldq t3, 24(a0) |
| |
| maxsw4 t0, zero, t0 |
| subq t9, 2, t9 |
| maxsw4 t1, zero, t1 |
| lda a0, 32(a0) |
| |
| maxsw4 t2, zero, t2 |
| addq a1, a2, ta |
| maxsw4 t3, zero, t3 |
| minsw4 t0, t8, t0 |
| |
| minsw4 t1, t8, t1 |
| minsw4 t2, t8, t2 |
| minsw4 t3, t8, t3 |
| pkwb t0, t0 |
| |
| pkwb t1, t1 |
| pkwb t2, t2 |
| pkwb t3, t3 |
| stl t0, 0(a1) |
| |
| stl t1, 4(a1) |
| addq ta, a2, a1 |
| stl t2, 0(ta) |
| stl t3, 4(ta) |
| |
| bne t9, 1b |
| ret |
| .end put_pixels_clamped_mvi_asm |
| |
| /************************************************************************ |
| * void add_pixels_clamped_mvi_asm(const int16_t *block, uint8_t *pixels, |
| * ptrdiff_t line_size) |
| */ |
| .align 6 |
| .globl add_pixels_clamped_mvi_asm |
| .ent add_pixels_clamped_mvi_asm |
| add_pixels_clamped_mvi_asm: |
| .frame sp, 0, ra |
| .prologue 0 |
| |
| lda t1, -1 |
| lda th, 8 |
| zap t1, 0x33, tg |
| nop |
| |
| srl tg, 1, t0 |
| xor tg, t0, tg # 0x8000800080008000 |
| zap t1, 0xaa, tf # 0x00ff00ff00ff00ff |
| |
| .align 4 |
| 1: ldl t1, 0(a1) # pix0 (try to hit cache line soon) |
| ldl t4, 4(a1) # pix1 |
| addq a1, a2, te # pixels += line_size |
| ldq t0, 0(a0) # shorts0 |
| |
| ldl t7, 0(te) # pix2 (try to hit cache line soon) |
| ldl ta, 4(te) # pix3 |
| ldq t3, 8(a0) # shorts1 |
| ldq t6, 16(a0) # shorts2 |
| |
| ldq t9, 24(a0) # shorts3 |
| unpkbw t1, t1 # 0 0 (quarter/op no.) |
| and t0, tg, t2 # 0 1 |
| unpkbw t4, t4 # 1 0 |
| |
| bic t0, tg, t0 # 0 2 |
| unpkbw t7, t7 # 2 0 |
| and t3, tg, t5 # 1 1 |
| addq t0, t1, t0 # 0 3 |
| |
| xor t0, t2, t0 # 0 4 |
| unpkbw ta, ta # 3 0 |
| and t6, tg, t8 # 2 1 |
| maxsw4 t0, zero, t0 # 0 5 |
| |
| bic t3, tg, t3 # 1 2 |
| bic t6, tg, t6 # 2 2 |
| minsw4 t0, tf, t0 # 0 6 |
| addq t3, t4, t3 # 1 3 |
| |
| pkwb t0, t0 # 0 7 |
| xor t3, t5, t3 # 1 4 |
| maxsw4 t3, zero, t3 # 1 5 |
| addq t6, t7, t6 # 2 3 |
| |
| xor t6, t8, t6 # 2 4 |
| and t9, tg, tb # 3 1 |
| minsw4 t3, tf, t3 # 1 6 |
| bic t9, tg, t9 # 3 2 |
| |
| maxsw4 t6, zero, t6 # 2 5 |
| addq t9, ta, t9 # 3 3 |
| stl t0, 0(a1) # 0 8 |
| minsw4 t6, tf, t6 # 2 6 |
| |
| xor t9, tb, t9 # 3 4 |
| maxsw4 t9, zero, t9 # 3 5 |
| lda a0, 32(a0) # block += 16; |
| pkwb t3, t3 # 1 7 |
| |
| minsw4 t9, tf, t9 # 3 6 |
| subq th, 2, th |
| pkwb t6, t6 # 2 7 |
| pkwb t9, t9 # 3 7 |
| |
| stl t3, 4(a1) # 1 8 |
| addq te, a2, a1 # pixels += line_size |
| stl t6, 0(te) # 2 8 |
| stl t9, 4(te) # 3 8 |
| |
| bne th, 1b |
| ret |
| .end add_pixels_clamped_mvi_asm |
