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+From d9c99a9bfab6bc33850ad2d3c90219cce73c4170 Mon Sep 17 00:00:00 2001
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+From: Rebecca Chang Swee Fun <rebecca.chang@starfivetech.com>
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+Date: Thu, 9 Jun 2022 04:09:14 +0000
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+Subject: [PATCH] third_party/dav1d: enable riscv64 build
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+
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+Signed-off-by: Rebecca Chang Swee Fun <rebecca.chang@starfivetech.com>
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+Change-Id: I52af220f329c52f6e5bb55c08980ee77ab8fe88e
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+---
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+ third_party/dav1d/BUILD.gn | 2 +
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+ .../dav1d/config/linux-noasm/riscv64/config.h | 40 +++++++++++++++++++
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+ third_party/dav1d/generate_configs.py | 1 +
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+ 3 files changed, 43 insertions(+)
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+ create mode 100644 third_party/dav1d/config/linux-noasm/riscv64/config.h
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+
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+diff --git a/third_party/dav1d/BUILD.gn b/third_party/dav1d/BUILD.gn
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+index 82c828c68fb4f..bb14440154ec2 100644
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+--- a/third_party/dav1d/BUILD.gn
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++++ b/third_party/dav1d/BUILD.gn
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+@@ -17,6 +17,8 @@ if (is_win) {
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+ assert(current_cpu == "x64" && (is_linux || is_chromeos),
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+ "Only Linux X64 MSAN is supported")
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+ platform_config_root = "config/linux-noasm/$current_cpu"
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++} else if (current_cpu == "riscv64") {
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++ platform_config_root = "config/linux-noasm/$current_cpu"
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+ } else {
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+ # Linux configuration files seem to work on Mac, so just reuse them.
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+ platform_config_root = "config/linux/$current_cpu"
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+diff --git a/third_party/dav1d/config/linux-noasm/riscv64/config.h b/third_party/dav1d/config/linux-noasm/riscv64/config.h
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+new file mode 100644
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+index 0000000000000..04e9f42fc1ed6
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+--- /dev/null
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++++ b/third_party/dav1d/config/linux-noasm/riscv64/config.h
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+@@ -0,0 +1,40 @@
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++/*
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++ * Autogenerated by the Meson build system.
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++ * Do not edit, your changes will be lost.
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++ */
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++
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++#pragma once
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++
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++#define ARCH_AARCH64 0
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++
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++#define ARCH_ARM 0
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++
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++#define ARCH_PPC64LE 0
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++
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++#define ARCH_X86 0
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++
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++#define ARCH_X86_32 0
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++
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++#define ARCH_X86_64 0
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++
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++#define CONFIG_16BPC 1
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++
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++#define CONFIG_8BPC 1
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++
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++// #define CONFIG_LOG 1 -- Logging is controlled by Chromium
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++
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++#define ENDIANNESS_BIG 0
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++
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++#define HAVE_ASM 0
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++
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++#define HAVE_CLOCK_GETTIME 1
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++
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++#define HAVE_DLSYM 1
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++
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++#define HAVE_POSIX_MEMALIGN 1
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++
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++// #define HAVE_PTHREAD_GETAFFINITY_NP 1 -- Controlled by Chomium
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++
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++#define HAVE_UNISTD_H 1
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++
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++// #define STACK_ALIGNMENT 32 -- Stack alignment is controlled by Chromium
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+diff --git a/third_party/dav1d/generate_configs.py b/third_party/dav1d/generate_configs.py
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+index 609b11e47a726..3cc497235a82f 100755
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+--- a/third_party/dav1d/generate_configs.py
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++++ b/third_party/dav1d/generate_configs.py
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+@@ -194,6 +194,7 @@ def main():
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+
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+ GenerateConfig('config/linux/x64', linux_env)
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+ GenerateConfig('config/linux-noasm/x64', linux_env, ['-Denable_asm=false'])
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++ GenerateConfig('config/linux-noasm/riscv64', linux_env, ['-Denable_asm=false'])
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+
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+ GenerateConfig('config/linux/x86', linux_env,
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+ ['--cross-file', '../crossfiles/linux32.crossfile'])
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+--
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+2.25.1
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+
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