From 1315596b510189b5159e742110b504177bdd4932 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 21 Jan 2016 19:08:54 +0000
Subject: refactor internal atomic.h

rather than having each arch provide its own atomic.h, there is a new
shared atomic.h in src/internal which pulls arch-specific definitions
from arc/$(ARCH)/atomic_arch.h. the latter can be extremely minimal,
defining only a_cas or new ll/sc type primitives which the shared
atomic.h will use to construct everything else.

this commit avoids making heavy changes to the individual archs'
atomic implementations. definitions which are identical or
near-identical to what the new shared atomic.h would produce have been
removed, but otherwise the changes made are just hooking up the
arch-specific files to the new infrastructure. major changes to take
advantage of the new system will come in subsequent commits.
---
 arch/x86_64/atomic.h | 105 ---------------------------------------------------
 1 file changed, 105 deletions(-)
 delete mode 100644 arch/x86_64/atomic.h

(limited to 'arch/x86_64/atomic.h')

diff --git a/arch/x86_64/atomic.h b/arch/x86_64/atomic.h
deleted file mode 100644
index 7690183d..00000000
--- a/arch/x86_64/atomic.h
+++ /dev/null
@@ -1,105 +0,0 @@
-#ifndef _INTERNAL_ATOMIC_H
-#define _INTERNAL_ATOMIC_H
-
-#include <stdint.h>
-
-static inline int a_ctz_64(uint64_t x)
-{
-	__asm__( "bsf %1,%0" : "=r"(x) : "r"(x) );
-	return x;
-}
-
-static inline int a_ctz_l(unsigned long x)
-{
-	__asm__( "bsf %1,%0" : "=r"(x) : "r"(x) );
-	return x;
-}
-
-static inline void a_and_64(volatile uint64_t *p, uint64_t v)
-{
-	__asm__( "lock ; and %1, %0"
-			 : "=m"(*p) : "r"(v) : "memory" );
-}
-
-static inline void a_or_64(volatile uint64_t *p, uint64_t v)
-{
-	__asm__( "lock ; or %1, %0"
-			 : "=m"(*p) : "r"(v) : "memory" );
-}
-
-static inline void a_or_l(volatile void *p, long v)
-{
-	__asm__( "lock ; or %1, %0"
-		: "=m"(*(long *)p) : "r"(v) : "memory" );
-}
-
-static inline void *a_cas_p(volatile void *p, void *t, void *s)
-{
-	__asm__( "lock ; cmpxchg %3, %1"
-		: "=a"(t), "=m"(*(long *)p) : "a"(t), "r"(s) : "memory" );
-	return t;
-}
-
-static inline int a_cas(volatile int *p, int t, int s)
-{
-	__asm__( "lock ; cmpxchg %3, %1"
-		: "=a"(t), "=m"(*p) : "a"(t), "r"(s) : "memory" );
-	return t;
-}
-
-static inline void a_or(volatile int *p, int v)
-{
-	__asm__( "lock ; or %1, %0"
-		: "=m"(*p) : "r"(v) : "memory" );
-}
-
-static inline void a_and(volatile int *p, int v)
-{
-	__asm__( "lock ; and %1, %0"
-		: "=m"(*p) : "r"(v) : "memory" );
-}
-
-static inline int a_swap(volatile int *x, int v)
-{
-	__asm__( "xchg %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
-	return v;
-}
-
-static inline int a_fetch_add(volatile int *x, int v)
-{
-	__asm__( "lock ; xadd %0, %1" : "=r"(v), "=m"(*x) : "0"(v) : "memory" );
-	return v;
-}
-
-static inline void a_inc(volatile int *x)
-{
-	__asm__( "lock ; incl %0" : "=m"(*x) : "m"(*x) : "memory" );
-}
-
-static inline void a_dec(volatile int *x)
-{
-	__asm__( "lock ; decl %0" : "=m"(*x) : "m"(*x) : "memory" );
-}
-
-static inline void a_store(volatile int *p, int x)
-{
-	__asm__( "mov %1, %0 ; lock ; orl $0,(%%rsp)" : "=m"(*p) : "r"(x) : "memory" );
-}
-
-static inline void a_spin()
-{
-	__asm__ __volatile__( "pause" : : : "memory" );
-}
-
-static inline void a_barrier()
-{
-	__asm__ __volatile__( "" : : : "memory" );
-}
-
-static inline void a_crash()
-{
-	__asm__ __volatile__( "hlt" : : : "memory" );
-}
-
-
-#endif
-- 
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