Added 32 bit atomic read.

Implemented all 64 bit atomic operations.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4357 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/libroot/os/arch/x86/atomic.S

@@ -61,28 +61,117 @@ _atomic_or1:
 	
 /* int32	atomic_read(vint32 *value) */
 FUNCTION(atomic_read):
+	movl		4(%esp), %edx
+_atomic_read1:
+	movl		(%edx), %eax
+	movl		%eax, %ecx
+	lock
+	cmpxchgl	%ecx, (%edx)
+	jnz			_atomic_read1
 	ret
 
 /* int64	atomic_set64(vint64 *value, int64 newValue) */
 FUNCTION(atomic_set64):
+	push		%ebp
+	push		%ebx
+	movl		12(%esp), %ebp	/* value */
+	movl		16(%esp), %ebx	/* newValue low */
+	movl		20(%esp), %ecx	/* newValue high */
+_atomic_set64_1:
+	movl		(%ebp), %eax	/* testAgainst low */
+	movl		4(%ebp), %edx	/* testAgainst high */
+	lock
+	cmpxchg8b	(%ebp)
+	jnz			_atomic_set64_1
+	pop			%ebx
+	pop			%ebp
 	ret
 
 /* int64	atomic_test_and_set64(vint64 *value, int64 newValue, int64 testAgainst) */
 FUNCTION(atomic_test_and_set64):
+	push		%ebp
+	push		%ebx
+	movl		12(%esp), %ebp	/* value */
+	movl		16(%esp), %ebx	/* newValue low */
+	movl		20(%esp), %ecx	/* newValue high */
+	movl		24(%esp), %eax	/* testAgainst low */
+	movl		28(%esp), %edx	/* testAgainst high */
+	lock
+	cmpxchg8b	(%ebp)
+	pop			%ebx
+	pop			%ebp
 	ret
 
 /* int64	atomic_add64(vint64 *value, int64 addValue) */
 FUNCTION(atomic_add64):
+	push		%ebp
+	push		%ebx
+	movl		12(%esp), %ebp
+_atomic_add64_1:
+	movl		(%ebp), %eax
+	movl		4(%ebp), %edx
+	movl		%eax, %ebx
+	movl		%edx, %ecx
+	addl		16(%esp), %ebx
+	adcl		20(%esp), %ecx
+	lock
+	cmpxchg8b	(%ebp)
+	jnz			_atomic_add64_1
+	pop			%ebx
+	pop			%ebp
 	ret
 
 /* int64	atomic_and64(vint64 *value, int64 andValue) */
 FUNCTION(atomic_and64):
+	push		%ebp
+	push		%ebx
+	movl		12(%esp), %ebp
+_atomic_and64_1:
+	movl		(%ebp), %eax
+	movl		4(%ebp), %edx
+	movl		%eax, %ebx
+	movl		%edx, %ecx
+	andl		16(%esp), %ebx
+	andl		20(%esp), %ecx
+	lock
+	cmpxchg8b	(%ebp)
+	jnz			_atomic_and64_1
+	pop			%ebx
+	pop			%ebp
 	ret
 
 /* int64	atomic_or64(vint64 *value, int64 orValue) */
 FUNCTION(atomic_or64):
+	push		%ebp
+	push		%ebx
+	movl		12(%esp), %ebp
+_atomic_or64_1:
+	movl		(%ebp), %eax
+	movl		4(%ebp), %edx
+	movl		%eax, %ebx
+	movl		%edx, %ecx
+	orl			16(%esp), %ebx
+	orl			20(%esp), %ecx
+	lock
+	cmpxchg8b	(%ebp)
+	jnz			_atomic_or64_1
+	pop			%ebx
+	pop			%ebp
 	ret
 
 /* int64	atomic_read64(vint64 *value) */
 FUNCTION(atomic_read64):
+	push		%ebp
+	push		%ebx
+	movl		12(%esp), %ebp
+_atomic_read64_1:
+	movl		(%ebp), %eax
+	movl		4(%ebp), %edx
+	movl		%eax, %ebx
+	movl		%edx, %ecx
+	lock
+	cmpxchg8b	(%ebp)
+	jnz			_atomic_read64_1
+	pop			%ebx
+	pop			%ebp
 	ret