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- /*
- * Alpha optimized DSP utils
- * Copyright (c) 2002 Falk Hueffner <falk@debian.org>
- *
- * This file is part of Libav.
- *
- * Libav 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.
- *
- * Libav 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 Libav; 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,
- * int 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,
- * int 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
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