401 lines
14 KiB
C
401 lines
14 KiB
C
/*
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* AltiVec optimizations for libjpeg-turbo
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*
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* Copyright (C) 2015, D. R. Commander. All Rights Reserved.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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/* CHROMA UPSAMPLING */
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#include "jsimd_altivec.h"
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void jsimd_h2v1_fancy_upsample_altivec(int max_v_samp_factor,
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JDIMENSION downsampled_width,
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JSAMPARRAY input_data,
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JSAMPARRAY *output_data_ptr)
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{
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JSAMPARRAY output_data = *output_data_ptr;
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JSAMPROW inptr, outptr;
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int inrow, incol;
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__vector unsigned char this0, last0, p_last0, next0 = { 0 }, p_next0,
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out;
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__vector short this0e, this0o, this0l, this0h, last0l, last0h,
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next0l, next0h, outle, outhe, outlo, outho;
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/* Constants */
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__vector unsigned char pb_zero = { __16X(0) }, pb_three = { __16X(3) },
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last_index_col0 =
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{ 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 },
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last_index =
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{ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 },
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next_index =
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{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 },
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next_index_lastcol =
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{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 15 },
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#if __BIG_ENDIAN__
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merge_pack_index =
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{ 1, 17, 3, 19, 5, 21, 7, 23, 9, 25, 11, 27, 13, 29, 15, 31 };
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#else
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merge_pack_index =
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{ 0, 16, 2, 18, 4, 20, 6, 22, 8, 24, 10, 26, 12, 28, 14, 30 };
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#endif
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__vector short pw_one = { __8X(1) }, pw_two = { __8X(2) };
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for (inrow = 0; inrow < max_v_samp_factor; inrow++) {
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inptr = input_data[inrow];
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outptr = output_data[inrow];
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if (downsampled_width & 15)
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inptr[downsampled_width] = inptr[downsampled_width - 1];
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this0 = vec_ld(0, inptr);
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p_last0 = vec_perm(this0, this0, last_index_col0);
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last0 = this0;
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for (incol = downsampled_width; incol > 0;
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incol -= 16, inptr += 16, outptr += 32) {
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if (downsampled_width - incol > 0) {
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p_last0 = vec_perm(last0, this0, last_index);
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last0 = this0;
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}
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if (incol <= 16)
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p_next0 = vec_perm(this0, this0, next_index_lastcol);
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else {
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next0 = vec_ld(16, inptr);
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p_next0 = vec_perm(this0, next0, next_index);
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}
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this0e = (__vector short)vec_mule(this0, pb_three);
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this0o = (__vector short)vec_mulo(this0, pb_three);
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this0l = vec_mergeh(this0e, this0o);
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this0h = vec_mergel(this0e, this0o);
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last0l = (__vector short)VEC_UNPACKHU(p_last0);
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last0h = (__vector short)VEC_UNPACKLU(p_last0);
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last0l = vec_add(last0l, pw_one);
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next0l = (__vector short)VEC_UNPACKHU(p_next0);
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next0h = (__vector short)VEC_UNPACKLU(p_next0);
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next0l = vec_add(next0l, pw_two);
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outle = vec_add(this0l, last0l);
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outlo = vec_add(this0l, next0l);
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outle = vec_sr(outle, (__vector unsigned short)pw_two);
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outlo = vec_sr(outlo, (__vector unsigned short)pw_two);
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out = vec_perm((__vector unsigned char)outle,
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(__vector unsigned char)outlo, merge_pack_index);
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vec_st(out, 0, outptr);
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if (incol > 8) {
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last0h = vec_add(last0h, pw_one);
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next0h = vec_add(next0h, pw_two);
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outhe = vec_add(this0h, last0h);
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outho = vec_add(this0h, next0h);
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outhe = vec_sr(outhe, (__vector unsigned short)pw_two);
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outho = vec_sr(outho, (__vector unsigned short)pw_two);
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out = vec_perm((__vector unsigned char)outhe,
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(__vector unsigned char)outho, merge_pack_index);
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vec_st(out, 16, outptr);
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}
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this0 = next0;
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}
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}
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}
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void jsimd_h2v2_fancy_upsample_altivec(int max_v_samp_factor,
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JDIMENSION downsampled_width,
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JSAMPARRAY input_data,
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JSAMPARRAY *output_data_ptr)
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{
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JSAMPARRAY output_data = *output_data_ptr;
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JSAMPROW inptr_1, inptr0, inptr1, outptr0, outptr1;
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int inrow, outrow, incol;
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__vector unsigned char this_1, this0, this1, out;
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__vector short this_1l, this_1h, this0l, this0h, this1l, this1h,
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lastcolsum_1h, lastcolsum1h,
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p_lastcolsum_1l, p_lastcolsum_1h, p_lastcolsum1l, p_lastcolsum1h,
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thiscolsum_1l, thiscolsum_1h, thiscolsum1l, thiscolsum1h,
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nextcolsum_1l = { 0 }, nextcolsum_1h = { 0 },
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nextcolsum1l = { 0 }, nextcolsum1h = { 0 },
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p_nextcolsum_1l, p_nextcolsum_1h, p_nextcolsum1l, p_nextcolsum1h,
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tmpl, tmph, outle, outhe, outlo, outho;
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/* Constants */
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__vector unsigned char pb_zero = { __16X(0) },
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last_index_col0 =
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{ 0, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 },
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last_index =
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{ 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 },
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next_index =
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{ 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 },
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next_index_lastcol =
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{ 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 14, 15 },
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#if __BIG_ENDIAN__
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merge_pack_index =
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{ 1, 17, 3, 19, 5, 21, 7, 23, 9, 25, 11, 27, 13, 29, 15, 31 };
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#else
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merge_pack_index =
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{ 0, 16, 2, 18, 4, 20, 6, 22, 8, 24, 10, 26, 12, 28, 14, 30 };
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#endif
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__vector short pw_zero = { __8X(0) }, pw_three = { __8X(3) },
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pw_seven = { __8X(7) }, pw_eight = { __8X(8) };
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__vector unsigned short pw_four = { __8X(4) };
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for (inrow = 0, outrow = 0; outrow < max_v_samp_factor; inrow++) {
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inptr_1 = input_data[inrow - 1];
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inptr0 = input_data[inrow];
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inptr1 = input_data[inrow + 1];
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outptr0 = output_data[outrow++];
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outptr1 = output_data[outrow++];
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if (downsampled_width & 15) {
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inptr_1[downsampled_width] = inptr_1[downsampled_width - 1];
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inptr0[downsampled_width] = inptr0[downsampled_width - 1];
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inptr1[downsampled_width] = inptr1[downsampled_width - 1];
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}
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this0 = vec_ld(0, inptr0);
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this0l = (__vector short)VEC_UNPACKHU(this0);
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this0h = (__vector short)VEC_UNPACKLU(this0);
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this0l = vec_mladd(this0l, pw_three, pw_zero);
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this0h = vec_mladd(this0h, pw_three, pw_zero);
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this_1 = vec_ld(0, inptr_1);
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this_1l = (__vector short)VEC_UNPACKHU(this_1);
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this_1h = (__vector short)VEC_UNPACKLU(this_1);
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thiscolsum_1l = vec_add(this0l, this_1l);
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thiscolsum_1h = vec_add(this0h, this_1h);
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lastcolsum_1h = thiscolsum_1h;
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p_lastcolsum_1l = vec_perm(thiscolsum_1l, thiscolsum_1l, last_index_col0);
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p_lastcolsum_1h = vec_perm(thiscolsum_1l, thiscolsum_1h, last_index);
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this1 = vec_ld(0, inptr1);
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this1l = (__vector short)VEC_UNPACKHU(this1);
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this1h = (__vector short)VEC_UNPACKLU(this1);
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thiscolsum1l = vec_add(this0l, this1l);
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thiscolsum1h = vec_add(this0h, this1h);
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lastcolsum1h = thiscolsum1h;
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p_lastcolsum1l = vec_perm(thiscolsum1l, thiscolsum1l, last_index_col0);
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p_lastcolsum1h = vec_perm(thiscolsum1l, thiscolsum1h, last_index);
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for (incol = downsampled_width; incol > 0;
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incol -= 16, inptr_1 += 16, inptr0 += 16, inptr1 += 16,
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outptr0 += 32, outptr1 += 32) {
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if (downsampled_width - incol > 0) {
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p_lastcolsum_1l = vec_perm(lastcolsum_1h, thiscolsum_1l, last_index);
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p_lastcolsum_1h = vec_perm(thiscolsum_1l, thiscolsum_1h, last_index);
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p_lastcolsum1l = vec_perm(lastcolsum1h, thiscolsum1l, last_index);
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p_lastcolsum1h = vec_perm(thiscolsum1l, thiscolsum1h, last_index);
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lastcolsum_1h = thiscolsum_1h; lastcolsum1h = thiscolsum1h;
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}
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if (incol <= 16) {
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p_nextcolsum_1l = vec_perm(thiscolsum_1l, thiscolsum_1h, next_index);
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p_nextcolsum_1h = vec_perm(thiscolsum_1h, thiscolsum_1h,
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next_index_lastcol);
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p_nextcolsum1l = vec_perm(thiscolsum1l, thiscolsum1h, next_index);
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p_nextcolsum1h = vec_perm(thiscolsum1h, thiscolsum1h,
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next_index_lastcol);
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} else {
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this0 = vec_ld(16, inptr0);
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this0l = (__vector short)VEC_UNPACKHU(this0);
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this0h = (__vector short)VEC_UNPACKLU(this0);
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this0l = vec_mladd(this0l, pw_three, pw_zero);
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this0h = vec_mladd(this0h, pw_three, pw_zero);
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this_1 = vec_ld(16, inptr_1);
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this_1l = (__vector short)VEC_UNPACKHU(this_1);
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this_1h = (__vector short)VEC_UNPACKLU(this_1);
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nextcolsum_1l = vec_add(this0l, this_1l);
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nextcolsum_1h = vec_add(this0h, this_1h);
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p_nextcolsum_1l = vec_perm(thiscolsum_1l, thiscolsum_1h, next_index);
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p_nextcolsum_1h = vec_perm(thiscolsum_1h, nextcolsum_1l, next_index);
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this1 = vec_ld(16, inptr1);
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this1l = (__vector short)VEC_UNPACKHU(this1);
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this1h = (__vector short)VEC_UNPACKLU(this1);
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nextcolsum1l = vec_add(this0l, this1l);
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nextcolsum1h = vec_add(this0h, this1h);
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p_nextcolsum1l = vec_perm(thiscolsum1l, thiscolsum1h, next_index);
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p_nextcolsum1h = vec_perm(thiscolsum1h, nextcolsum1l, next_index);
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}
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/* Process the upper row */
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tmpl = vec_mladd(thiscolsum_1l, pw_three, pw_zero);
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outle = vec_add(tmpl, p_lastcolsum_1l);
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outle = vec_add(outle, pw_eight);
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outle = vec_sr(outle, pw_four);
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outlo = vec_add(tmpl, p_nextcolsum_1l);
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outlo = vec_add(outlo, pw_seven);
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outlo = vec_sr(outlo, pw_four);
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out = vec_perm((__vector unsigned char)outle,
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(__vector unsigned char)outlo, merge_pack_index);
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vec_st(out, 0, outptr0);
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if (incol > 8) {
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tmph = vec_mladd(thiscolsum_1h, pw_three, pw_zero);
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outhe = vec_add(tmph, p_lastcolsum_1h);
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outhe = vec_add(outhe, pw_eight);
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outhe = vec_sr(outhe, pw_four);
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outho = vec_add(tmph, p_nextcolsum_1h);
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outho = vec_add(outho, pw_seven);
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outho = vec_sr(outho, pw_four);
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out = vec_perm((__vector unsigned char)outhe,
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(__vector unsigned char)outho, merge_pack_index);
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vec_st(out, 16, outptr0);
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}
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/* Process the lower row */
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tmpl = vec_mladd(thiscolsum1l, pw_three, pw_zero);
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outle = vec_add(tmpl, p_lastcolsum1l);
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outle = vec_add(outle, pw_eight);
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outle = vec_sr(outle, pw_four);
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outlo = vec_add(tmpl, p_nextcolsum1l);
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outlo = vec_add(outlo, pw_seven);
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outlo = vec_sr(outlo, pw_four);
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out = vec_perm((__vector unsigned char)outle,
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(__vector unsigned char)outlo, merge_pack_index);
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vec_st(out, 0, outptr1);
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if (incol > 8) {
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tmph = vec_mladd(thiscolsum1h, pw_three, pw_zero);
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outhe = vec_add(tmph, p_lastcolsum1h);
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outhe = vec_add(outhe, pw_eight);
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outhe = vec_sr(outhe, pw_four);
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outho = vec_add(tmph, p_nextcolsum1h);
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outho = vec_add(outho, pw_seven);
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outho = vec_sr(outho, pw_four);
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out = vec_perm((__vector unsigned char)outhe,
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(__vector unsigned char)outho, merge_pack_index);
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vec_st(out, 16, outptr1);
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}
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thiscolsum_1l = nextcolsum_1l; thiscolsum_1h = nextcolsum_1h;
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thiscolsum1l = nextcolsum1l; thiscolsum1h = nextcolsum1h;
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}
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}
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}
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/* These are rarely used (mainly just for decompressing YCCK images) */
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void jsimd_h2v1_upsample_altivec(int max_v_samp_factor,
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JDIMENSION output_width,
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JSAMPARRAY input_data,
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JSAMPARRAY *output_data_ptr)
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{
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JSAMPARRAY output_data = *output_data_ptr;
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JSAMPROW inptr, outptr;
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int inrow, incol;
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__vector unsigned char in, inl, inh;
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for (inrow = 0; inrow < max_v_samp_factor; inrow++) {
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inptr = input_data[inrow];
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outptr = output_data[inrow];
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for (incol = (output_width + 31) & (~31); incol > 0;
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incol -= 64, inptr += 32, outptr += 64) {
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in = vec_ld(0, inptr);
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inl = vec_mergeh(in, in);
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inh = vec_mergel(in, in);
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vec_st(inl, 0, outptr);
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vec_st(inh, 16, outptr);
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if (incol > 32) {
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in = vec_ld(16, inptr);
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inl = vec_mergeh(in, in);
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inh = vec_mergel(in, in);
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vec_st(inl, 32, outptr);
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vec_st(inh, 48, outptr);
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}
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}
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}
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}
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void jsimd_h2v2_upsample_altivec(int max_v_samp_factor,
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JDIMENSION output_width,
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JSAMPARRAY input_data,
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JSAMPARRAY *output_data_ptr)
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{
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JSAMPARRAY output_data = *output_data_ptr;
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JSAMPROW inptr, outptr0, outptr1;
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int inrow, outrow, incol;
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__vector unsigned char in, inl, inh;
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for (inrow = 0, outrow = 0; outrow < max_v_samp_factor; inrow++) {
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inptr = input_data[inrow];
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outptr0 = output_data[outrow++];
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outptr1 = output_data[outrow++];
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for (incol = (output_width + 31) & (~31); incol > 0;
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incol -= 64, inptr += 32, outptr0 += 64, outptr1 += 64) {
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in = vec_ld(0, inptr);
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inl = vec_mergeh(in, in);
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inh = vec_mergel(in, in);
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vec_st(inl, 0, outptr0);
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vec_st(inl, 0, outptr1);
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vec_st(inh, 16, outptr0);
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vec_st(inh, 16, outptr1);
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if (incol > 32) {
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in = vec_ld(16, inptr);
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inl = vec_mergeh(in, in);
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inh = vec_mergel(in, in);
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vec_st(inl, 32, outptr0);
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vec_st(inl, 32, outptr1);
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vec_st(inh, 48, outptr0);
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vec_st(inh, 48, outptr1);
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}
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}
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}
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}
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