fix excessively slow TLS performance on some mips models

[musl] / arch / mips / pthread_arch.h

diff --git a/arch/mips/pthread_arch.h b/arch/mips/pthread_arch.h
index f75379c..376b774 100644 (file)
--- a/arch/mips/pthread_arch.h
+++ b/arch/mips/pthread_arch.h
@@ -1,8 +1,18 @@
-static inline struct pthread *__pthread_self()
+static inline uintptr_t __get_tp()
 {
-       struct pthread *self;
-       __asm__ __volatile__ (".word 0x7c03e83b" : "=v" (self) );
-       return self;
+       register uintptr_t tp __asm__("$3");
+#if __mips_isa_rev < 2
+       __asm__ (".word 0x7c03e83b" : "=r" (tp) );
+#else
+       __asm__ ("rdhwr %0, $29" : "=r" (tp) );
+#endif
+       return tp;
 }
 
-#define CANCEL_REG_IP (3-(union {int __i; char __b;}){1}.__b)
+#define TLS_ABOVE_TP
+#define GAP_ABOVE_TP 0
+
+#define TP_OFFSET 0x7000
+#define DTP_OFFSET 0x8000
+
+#define MC_PC pc