ref: c89eb564366dfe11da016a738e4fc609f17710c1
dir: /src/ctx.h/
/* * Copyright © 2018, VideoLAN and dav1d authors * Copyright © 2018, Two Orioles, LLC * 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. */ #ifndef DAV1D_SRC_CTX_H #define DAV1D_SRC_CTX_H #include <stdint.h> #include "common/attributes.h" union alias64 { uint64_t u64; uint8_t u8[8]; } ATTR_ALIAS; union alias32 { uint32_t u32; uint8_t u8[4]; } ATTR_ALIAS; union alias16 { uint16_t u16; uint8_t u8[2]; } ATTR_ALIAS; union alias8 { uint8_t u8; } ATTR_ALIAS; #define set_ctx_rep4(type, var, off, val) do { \ const uint64_t const_val = val; \ ((union alias64 *) &var[off + 0])->u64 = const_val; \ ((union alias64 *) &var[off + 8])->u64 = const_val; \ ((union alias64 *) &var[off + 16])->u64 = const_val; \ ((union alias64 *) &var[off + 24])->u64 = const_val; \ } while (0) #define set_ctx_rep2(type, var, off, val) do { \ const uint64_t const_val = val; \ ((union alias64 *) &var[off + 0])->u64 = const_val; \ ((union alias64 *) &var[off + 8])->u64 = const_val; \ } while (0) #define set_ctx_rep1(typesz, var, off, val) \ ((union alias##typesz *) &var[off])->u##typesz = val #define case_set(var, dir, diridx, off) \ switch (var) { \ case 1: set_ctx( 8, dir, diridx, off, 0x01, set_ctx_rep1); break; \ case 2: set_ctx(16, dir, diridx, off, 0x0101, set_ctx_rep1); break; \ case 4: set_ctx(32, dir, diridx, off, 0x01010101U, set_ctx_rep1); break; \ case 8: set_ctx(64, dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep1); break; \ case 16: set_ctx( , dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep2); break; \ case 32: set_ctx( , dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep4); break; \ } #define case_set_upto16(var, dir, diridx, off) \ switch (var) { \ case 1: set_ctx( 8, dir, diridx, off, 0x01, set_ctx_rep1); break; \ case 2: set_ctx(16, dir, diridx, off, 0x0101, set_ctx_rep1); break; \ case 4: set_ctx(32, dir, diridx, off, 0x01010101U, set_ctx_rep1); break; \ case 8: set_ctx(64, dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep1); break; \ case 16: set_ctx( , dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep2); break; \ } #define case_set_upto32_with_default(var, dir, diridx, off) \ switch (var) { \ case 1: set_ctx( 8, dir, diridx, off, 0x01, set_ctx_rep1); break; \ case 2: set_ctx(16, dir, diridx, off, 0x0101, set_ctx_rep1); break; \ case 4: set_ctx(32, dir, diridx, off, 0x01010101U, set_ctx_rep1); break; \ case 8: set_ctx(64, dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep1); break; \ case 16: set_ctx( , dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep2); break; \ case 32: set_ctx( , dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep4); break; \ default: default_memset(dir, diridx, off, var); break; \ } #define case_set_upto16_with_default(var, dir, diridx, off) \ switch (var) { \ case 1: set_ctx( 8, dir, diridx, off, 0x01, set_ctx_rep1); break; \ case 2: set_ctx(16, dir, diridx, off, 0x0101, set_ctx_rep1); break; \ case 4: set_ctx(32, dir, diridx, off, 0x01010101U, set_ctx_rep1); break; \ case 8: set_ctx(64, dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep1); break; \ case 16: set_ctx( , dir, diridx, off, 0x0101010101010101ULL, set_ctx_rep2); break; \ default: default_memset(dir, diridx, off, var); break; \ } #endif /* DAV1D_SRC_CTX_H */