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 8a49965..376b774 100644 (file)
--- a/arch/mips/pthread_arch.h
+++ b/arch/mips/pthread_arch.h
@@ -1,19 +1,18 @@
-static inline struct pthread *__pthread_self()
+static inline uintptr_t __get_tp()
 {
-#ifdef __clang__
-       char *tp;
-       __asm__ __volatile__ (".word 0x7c03e83b ; move %0, $3" : "=r" (tp) : : "$3" );
+       register uintptr_t tp __asm__("$3");
+#if __mips_isa_rev < 2
+       __asm__ (".word 0x7c03e83b" : "=r" (tp) );
 #else
-       register char *tp __asm__("$3");
-       /* rdhwr $3,$29 */
-       __asm__ __volatile__ (".word 0x7c03e83b" : "=r" (tp) );
+       __asm__ ("rdhwr %0, $29" : "=r" (tp) );
 #endif
-       return (pthread_t)(tp - 0x7000 - sizeof(struct pthread));
+       return tp;
 }
 
 #define TLS_ABOVE_TP
-#define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread) + 0x7000)
+#define GAP_ABOVE_TP 0
 
+#define TP_OFFSET 0x7000
 #define DTP_OFFSET 0x8000
 
 #define MC_PC pc