mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-03 09:01:54 -05:00
cpu: add cpu support implementation
This commit is contained in:
Wim Taymans
parent
6f75c2d078
commit
9ca9fda253
3 changed files with 377 additions and 1 deletions
176
spa/plugins/support/cpu-x86.c
Normal file
176
spa/plugins/support/cpu-x86.c
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@ -0,0 +1,176 @@
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/* Spa
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*
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* Copyright © 2018 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <cpuid.h>
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static int
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x86_init(struct impl *impl)
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{
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uint32_t flags;
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unsigned int vendor;
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unsigned int model, family;
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unsigned int max_level, ext_level, has_osxsave;
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unsigned int eax, ebx, ecx, edx;
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max_level = __get_cpuid_max(0, &vendor);
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if (max_level < 1)
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return 0;
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__cpuid(1, eax, ebx, ecx, edx);
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model = (eax >> 4) & 0x0f;
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family = (eax >> 8) & 0x0f;
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if (vendor == signature_INTEL_ebx ||
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vendor == signature_AMD_ebx) {
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unsigned int extended_model, extended_family;
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extended_model = (eax >> 12) & 0xf0;
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extended_family = (eax >> 20) & 0xff;
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if (family == 0x0f) {
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family += extended_family;
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model += extended_model;
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} else if (family == 0x06)
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model += extended_model;
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}
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flags = 0;
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if (ecx & bit_SSE3)
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flags |= SPA_CPU_FLAG_SSE3;
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if (ecx & bit_SSSE3)
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flags |= SPA_CPU_FLAG_SSSE3;
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if (ecx & bit_SSE4_1)
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flags |= SPA_CPU_FLAG_SSE41;
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if (ecx & bit_SSE4_2)
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flags |= SPA_CPU_FLAG_SSE42;
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if (ecx & bit_AVX)
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flags |= SPA_CPU_FLAG_AVX;
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has_osxsave = ecx & bit_OSXSAVE;
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if (ecx & bit_FMA)
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flags |= SPA_CPU_FLAG_FMA3;
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if (edx & bit_CMOV)
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flags |= SPA_CPU_FLAG_CMOV;
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if (edx & bit_MMX)
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flags |= SPA_CPU_FLAG_MMX;
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if (edx & bit_SSE)
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flags |= SPA_CPU_FLAG_SSE;
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if (edx & bit_SSE2)
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flags |= SPA_CPU_FLAG_SSE2;
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if (max_level >= 7) {
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__cpuid_count(7, 0, eax, ebx, ecx, edx);
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if (ebx & bit_BMI)
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flags |= SPA_CPU_FLAG_BMI1;
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if (ebx & bit_AVX2)
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flags |= SPA_CPU_FLAG_AVX2;
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if (ebx & bit_BMI2)
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flags |= SPA_CPU_FLAG_BMI2;
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#define AVX512_BITS (bit_AVX512F | bit_AVX512DQ | bit_AVX512CD | bit_AVX512BW | bit_AVX512VL)
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if ((ebx & AVX512_BITS) == AVX512_BITS)
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flags |= SPA_CPU_FLAG_AVX512;
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}
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/* Check cpuid level of extended features. */
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__cpuid (0x80000000, ext_level, ebx, ecx, edx);
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if (ext_level >= 0x80000001) {
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__cpuid (0x80000001, eax, ebx, ecx, edx);
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if (edx & bit_3DNOW)
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flags |= SPA_CPU_FLAG_3DNOW;
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if (edx & bit_3DNOWP)
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flags |= SPA_CPU_FLAG_3DNOWEXT;
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if (edx & bit_MMX)
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flags |= SPA_CPU_FLAG_MMX;
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if (edx & bit_MMXEXT)
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flags |= SPA_CPU_FLAG_MMXEXT;
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if (ecx & bit_FMA4)
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flags |= SPA_CPU_FLAG_FMA4;
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if (ecx & bit_XOP)
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flags |= SPA_CPU_FLAG_XOP;
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}
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/* Get XCR_XFEATURE_ENABLED_MASK register with xgetbv. */
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#define XCR_XFEATURE_ENABLED_MASK 0x0
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#define XSTATE_FP 0x1
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#define XSTATE_SSE 0x2
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#define XSTATE_YMM 0x4
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#define XSTATE_OPMASK 0x20
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#define XSTATE_ZMM 0x40
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#define XSTATE_HI_ZMM 0x80
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#define XCR_AVX_ENABLED_MASK \
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(XSTATE_SSE | XSTATE_YMM)
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#define XCR_AVX512F_ENABLED_MASK \
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(XSTATE_SSE | XSTATE_YMM | XSTATE_OPMASK | XSTATE_ZMM | XSTATE_HI_ZMM)
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if (has_osxsave)
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asm (".byte 0x0f; .byte 0x01; .byte 0xd0"
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: "=a" (eax), "=d" (edx)
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: "c" (XCR_XFEATURE_ENABLED_MASK));
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else
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eax = 0;
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/* Check if AVX registers are supported. */
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if ((eax & XCR_AVX_ENABLED_MASK) != XCR_AVX_ENABLED_MASK) {
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flags &= ~(SPA_CPU_FLAG_AVX |
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SPA_CPU_FLAG_AVX2 |
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SPA_CPU_FLAG_FMA3 |
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SPA_CPU_FLAG_FMA4 |
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SPA_CPU_FLAG_XOP);
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}
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/* Check if AVX512F registers are supported. */
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if ((eax & XCR_AVX512F_ENABLED_MASK) != XCR_AVX512F_ENABLED_MASK) {
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flags &= ~SPA_CPU_FLAG_AVX512;
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}
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if (flags & SPA_CPU_FLAG_AVX512)
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impl->max_align = 64;
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else if (flags & (SPA_CPU_FLAG_AVX2 |
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SPA_CPU_FLAG_AVX |
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SPA_CPU_FLAG_XOP |
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SPA_CPU_FLAG_FMA4 |
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SPA_CPU_FLAG_FMA3))
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impl->max_align = 32;
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else if (flags & (SPA_CPU_FLAG_AESNI |
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SPA_CPU_FLAG_SSE42 |
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SPA_CPU_FLAG_SSE41 |
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SPA_CPU_FLAG_SSSE3 |
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SPA_CPU_FLAG_SSE3 |
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SPA_CPU_FLAG_SSE2 |
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SPA_CPU_FLAG_SSE))
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impl->max_align = 16;
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else
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impl->max_align = 8;
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impl->flags = flags;
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return 0;
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}
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199
spa/plugins/support/cpu.c
Normal file
199
spa/plugins/support/cpu.c
Normal file
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@ -0,0 +1,199 @@
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/* Spa
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*
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* Copyright © 2018 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#define _GNU_SOURCE
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#include <stddef.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <stdio.h>
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#include <sched.h>
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#include <spa/support/log.h>
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#include <spa/support/cpu.h>
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#include <spa/support/plugin.h>
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#include <spa/utils/type.h>
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#define NAME "cpu"
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struct impl {
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struct spa_handle handle;
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struct spa_cpu cpu;
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struct spa_log *log;
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uint32_t flags;
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uint32_t count;
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uint32_t max_align;
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};
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# if defined (__i386__) || defined (__x86_64__)
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#include "cpu-x86.c"
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#define init(t) x86_init(t)
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#endif
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static uint32_t
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impl_cpu_get_flags(struct spa_cpu *cpu)
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{
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struct impl *impl = SPA_CONTAINER_OF(cpu, struct impl, cpu);
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return impl->flags;
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}
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static uint32_t get_count(struct impl *this)
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{
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cpu_set_t cpuset;
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CPU_ZERO(&cpuset);
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if (sched_getaffinity(0, sizeof(cpuset), &cpuset) == 0)
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return CPU_COUNT(&cpuset);
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return 1;
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}
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static uint32_t
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impl_cpu_get_count(struct spa_cpu *cpu)
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{
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struct impl *impl = SPA_CONTAINER_OF(cpu, struct impl, cpu);
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return impl->count;
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}
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static uint32_t
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impl_cpu_get_max_align(struct spa_cpu *cpu)
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{
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struct impl *impl = SPA_CONTAINER_OF(cpu, struct impl, cpu);
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return impl->max_align;
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}
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static const struct spa_cpu impl_cpu = {
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SPA_VERSION_CPU,
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NULL,
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impl_cpu_get_flags,
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impl_cpu_get_count,
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impl_cpu_get_max_align,
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};
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static int impl_get_interface(struct spa_handle *handle, uint32_t type, void **interface)
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{
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struct impl *this;
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spa_return_val_if_fail(handle != NULL, -EINVAL);
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spa_return_val_if_fail(interface != NULL, -EINVAL);
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this = (struct impl *) handle;
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if (type == SPA_TYPE_INTERFACE_CPU)
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*interface = &this->cpu;
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else
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return -ENOENT;
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return 0;
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}
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static int impl_clear(struct spa_handle *handle)
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{
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return 0;
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}
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static size_t
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impl_get_size(const struct spa_handle_factory *factory,
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const struct spa_dict *params)
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{
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return sizeof(struct impl);
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}
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static int
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impl_init(const struct spa_handle_factory *factory,
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struct spa_handle *handle,
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const struct spa_dict *info,
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const struct spa_support *support,
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uint32_t n_support)
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{
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struct impl *this;
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uint32_t i;
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spa_return_val_if_fail(factory != NULL, -EINVAL);
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spa_return_val_if_fail(handle != NULL, -EINVAL);
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handle->get_interface = impl_get_interface;
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handle->clear = impl_clear;
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this = (struct impl *) handle;
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this->cpu = impl_cpu;
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for (i = 0; i < n_support; i++) {
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if (support[i].type == SPA_TYPE_INTERFACE_Log)
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this->log = support[i].data;
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}
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this->flags = 0;
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this->max_align = 16;
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this->count = get_count(this);
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init(this);
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spa_log_debug(this->log, NAME " %p: count:%d align:%d flags:%08x",
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this, this->count, this->max_align, this->flags);
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return 0;
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}
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static const struct spa_interface_info impl_interfaces[] = {
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{SPA_TYPE_INTERFACE_CPU,},
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};
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static int
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impl_enum_interface_info(const struct spa_handle_factory *factory,
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const struct spa_interface_info **info,
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uint32_t *index)
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{
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spa_return_val_if_fail(factory != NULL, -EINVAL);
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spa_return_val_if_fail(info != NULL, -EINVAL);
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spa_return_val_if_fail(index != NULL, -EINVAL);
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switch (*index) {
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case 0:
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*info = &impl_interfaces[*index];
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break;
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default:
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return 0;
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}
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(*index)++;
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return 1;
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}
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|
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static const struct spa_handle_factory cpu_factory = {
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SPA_VERSION_HANDLE_FACTORY,
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NAME,
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NULL,
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impl_get_size,
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impl_init,
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impl_enum_interface_info,
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};
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|
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int spa_handle_factory_register(const struct spa_handle_factory *factory);
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|
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static void reg(void) __attribute__ ((constructor));
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static void reg(void)
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{
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spa_handle_factory_register(&cpu_factory);
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}
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|
@ -1,4 +1,5 @@
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spa_support_sources = ['logger.c',
|
spa_support_sources = ['cpu.c',
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'logger.c',
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'loop.c',
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'loop.c',
|
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'plugin.c']
|
'plugin.c']
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||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue