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allocator: Improve MIPS coverage of spinlocks

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klzgrad 2019-11-30 22:38:31 +08:00
parent 06d70db2e2
commit 7cbb8e866a
1 changed files with 2 additions and 2 deletions
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4
src/base/allocator/partition_allocator/yield_processor.h
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@ -17,12 +17,12 @@
#define YIELD_PROCESSOR __asm__ __volatile__("pause")
#elif (defined(ARCH_CPU_ARMEL) && __ARM_ARCH >= 6) || defined(ARCH_CPU_ARM64)
#define YIELD_PROCESSOR __asm__ __volatile__("yield")
#elif defined(ARCH_CPU_MIPSEL)
#elif defined(ARCH_CPU_MIPSEL) && __mips_isa_rev < 2
// The MIPS32 docs state that the PAUSE instruction is a no-op on older
// architectures (first added in MIPS32r2). To avoid assembler errors when
// targeting pre-r2, we must encode the instruction manually.
#define YIELD_PROCESSOR __asm__ __volatile__(".word 0x00000140")
#elif defined(ARCH_CPU_MIPS64EL) && __mips_isa_rev >= 2
#elif defined(ARCH_CPU_MIPS_FAMILY) && __mips_isa_rev >= 2
// Don't bother doing using .word here since r2 is the lowest supported mips64
// that Chromium supports.
#define YIELD_PROCESSOR __asm__ __volatile__("pause")