diff options
Diffstat (limited to 'libavcodec/x86/huffyuvencdsp.asm')
| -rw-r--r-- | libavcodec/x86/huffyuvencdsp.asm | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/libavcodec/x86/huffyuvencdsp.asm b/libavcodec/x86/huffyuvencdsp.asm new file mode 100644 index 0000000000..a55a1de65d --- /dev/null +++ b/libavcodec/x86/huffyuvencdsp.asm @@ -0,0 +1,150 @@ +;************************************************************************ +;* SIMD-optimized HuffYUV encoding functions +;* Copyright (c) 2000, 2001 Fabrice Bellard +;* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> +;* +;* MMX optimization by Nick Kurshev <nickols_k@mail.ru> +;* Conversion to NASM format by Tiancheng "Timothy" Gu <timothygu99@gmail.com> +;* +;* 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 +;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA +;****************************************************************************** + +%include "libavutil/x86/x86util.asm" + +section .text + +; void ff_diff_bytes(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, +; intptr_t w); +%macro DIFF_BYTES_PROLOGUE 0 +%if ARCH_X86_32 +cglobal diff_bytes, 3,5,2, dst, src1, src2 +%define wq r4q + DECLARE_REG_TMP 3 + mov wq, r3mp +%else +cglobal diff_bytes, 4,5,2, dst, src1, src2, w + DECLARE_REG_TMP 4 +%endif ; ARCH_X86_32 +%define i t0q +%endmacro + +; label to jump to if w < regsize +%macro DIFF_BYTES_LOOP_PREP 1 + mov i, wq + and i, -2 * regsize + jz %1 + add dstq, i + add src1q, i + add src2q, i + neg i +%endmacro + +; mov type used for src1q, dstq, first reg, second reg +%macro DIFF_BYTES_LOOP_CORE 4 +%if mmsize != 16 + mov%1 %3, [src1q + i] + mov%1 %4, [src1q + i + regsize] + psubb %3, [src2q + i] + psubb %4, [src2q + i + regsize] + mov%2 [dstq + i], %3 + mov%2 [regsize + dstq + i], %4 +%else + ; SSE enforces alignment of psubb operand + mov%1 %3, [src1q + i] + movu %4, [src2q + i] + psubb %3, %4 + mov%2 [dstq + i], %3 + mov%1 %3, [src1q + i + regsize] + movu %4, [src2q + i + regsize] + psubb %3, %4 + mov%2 [regsize + dstq + i], %3 +%endif +%endmacro + +%macro DIFF_BYTES_BODY 2 ; mov type used for src1q, for dstq + %define regsize mmsize +.loop_%1%2: + DIFF_BYTES_LOOP_CORE %1, %2, m0, m1 + add i, 2 * regsize + jl .loop_%1%2 +.skip_main_%1%2: + and wq, 2 * regsize - 1 + jz .end_%1%2 +%if mmsize > 16 + ; fall back to narrower xmm + %define regsize mmsize / 2 + DIFF_BYTES_LOOP_PREP .setup_loop_gpr_aa +.loop2_%1%2: + DIFF_BYTES_LOOP_CORE %1, %2, xm0, xm1 + add i, 2 * regsize + jl .loop2_%1%2 +.setup_loop_gpr_%1%2: + and wq, 2 * regsize - 1 + jz .end_%1%2 +%endif + add dstq, wq + add src1q, wq + add src2q, wq + neg wq +.loop_gpr_%1%2: + mov t0b, [src1q + wq] + sub t0b, [src2q + wq] + mov [dstq + wq], t0b + inc wq + jl .loop_gpr_%1%2 +.end_%1%2: + REP_RET +%endmacro + +%if ARCH_X86_32 +INIT_MMX mmx +DIFF_BYTES_PROLOGUE + %define regsize mmsize + DIFF_BYTES_LOOP_PREP .skip_main_aa + DIFF_BYTES_BODY a, a +%undef i +%endif + +INIT_XMM sse2 +DIFF_BYTES_PROLOGUE + %define regsize mmsize + DIFF_BYTES_LOOP_PREP .skip_main_aa + test dstq, regsize - 1 + jnz .loop_uu + test src1q, regsize - 1 + jnz .loop_ua + DIFF_BYTES_BODY a, a + DIFF_BYTES_BODY u, a + DIFF_BYTES_BODY u, u +%undef i + +%if HAVE_AVX2_EXTERNAL +INIT_YMM avx2 +DIFF_BYTES_PROLOGUE + %define regsize mmsize + ; Directly using unaligned SSE2 version is marginally faster than + ; branching based on arguments. + DIFF_BYTES_LOOP_PREP .skip_main_uu + test dstq, regsize - 1 + jnz .loop_uu + test src1q, regsize - 1 + jnz .loop_ua + DIFF_BYTES_BODY a, a + DIFF_BYTES_BODY u, a + DIFF_BYTES_BODY u, u +%undef i +%endif |