av_cold void ff_ac3dsp_init_x86(AC3DSPContext *c, int bit_exact) { #if HAVE_YASM int mm_flags = av_get_cpu_flags(); if (mm_flags & AV_CPU_FLAG_MMX) { c->ac3_exponent_min = ff_ac3_exponent_min_mmx; c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmx; c->ac3_lshift_int16 = ff_ac3_lshift_int16_mmx; c->ac3_rshift_int32 = ff_ac3_rshift_int32_mmx; } if (mm_flags & AV_CPU_FLAG_3DNOW && HAVE_AMD3DNOW) { c->extract_exponents = ff_ac3_extract_exponents_3dnow; if (!bit_exact) { c->float_to_fixed24 = ff_float_to_fixed24_3dnow; } } if (mm_flags & AV_CPU_FLAG_MMX2 && HAVE_MMX2) { c->ac3_exponent_min = ff_ac3_exponent_min_mmxext; c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_mmxext; } if (mm_flags & AV_CPU_FLAG_SSE && HAVE_SSE) { c->float_to_fixed24 = ff_float_to_fixed24_sse; } if (mm_flags & AV_CPU_FLAG_SSE2 && HAVE_SSE) { c->ac3_exponent_min = ff_ac3_exponent_min_sse2; c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_sse2; c->float_to_fixed24 = ff_float_to_fixed24_sse2; c->compute_mantissa_size = ff_ac3_compute_mantissa_size_sse2; c->extract_exponents = ff_ac3_extract_exponents_sse2; if (!(mm_flags & AV_CPU_FLAG_SSE2SLOW)) { c->ac3_lshift_int16 = ff_ac3_lshift_int16_sse2; c->ac3_rshift_int32 = ff_ac3_rshift_int32_sse2; } } if (mm_flags & AV_CPU_FLAG_SSSE3 && HAVE_SSSE3) { c->ac3_max_msb_abs_int16 = ff_ac3_max_msb_abs_int16_ssse3; if (!(mm_flags & AV_CPU_FLAG_ATOM)) { c->extract_exponents = ff_ac3_extract_exponents_ssse3; } } #endif }