File linuxsampler_arm.patch of Package linuxsampler

File linuxsampler_arm.patch of Package linuxsampler (Revision f6ba4cdd13d499daacbb6504a7ca2f1a)

Currently displaying revision f6ba4cdd13d499daacbb6504a7ca2f1a , Show latest

diff -U 3 -H -d -r -N -- linuxsampler.orig/src/common/RTMath.cpp linuxsampler/src/common/RTMath.cpp
--- linuxsampler.orig/src/common/RTMath.cpp	2012-04-16 15:49:24.000000000 +0300
+++ linuxsampler/src/common/RTMath.cpp	2014-10-20 03:13:40.251436023 +0300
@@ -22,6 +22,9 @@
  ***************************************************************************/
 
 #include "RTMath.h"
+#if defined(__arm__)
+#include <time.h>
+#endif
 
 static float CentsToFreqTable[CONFIG_MAX_PITCH * 1200 * 2 + 1]; // +-1200 cents per octave
 
@@ -71,6 +74,10 @@
     return t;
     #elif defined(__APPLE__)
     return GetMachTime();
+    #elif defined(__arm__)
+    timespec tp;
+    clock_gettime(CLOCK_MONOTONIC, &tp);
+    return tp.tv_nsec;
     #else // we don't want to use a slow generic solution
     #  error "Sorry, LinuxSampler lacks time stamp code for your system."
     #  error "Please report this error and the CPU you are using to the LinuxSampler developers mailing list!"
diff -U 3 -H -d -r -N -- linuxsampler.orig/src/common/atomic.h linuxsampler/src/common/atomic.h
--- linuxsampler.orig/src/common/atomic.h	2012-04-16 15:49:24.000000000 +0300
+++ linuxsampler/src/common/atomic.h	2014-10-20 03:33:34.813359536 +0300
@@ -1187,6 +1187,128 @@
 
 #else
 
+#ifdef __arm__
+ 
+/*
+ * That part of code for ARM11 was taken from ALSA's iatomic.h
+ */
+
+/*
+ * FIXME: bellow code is valid only for SA11xx
+ */
+
+/*
+ * Save the current interrupt enable state & disable IRQs
+ */
+#define local_irq_save(x)					\
+	({							\
+		unsigned long temp;				\
+	__asm__ __volatile__(					\
+	"mrs	%0, cpsr		@ local_irq_save\n"	\
+	"orr	%1, %0, #128\n"					\
+	"msr	cpsr_c, %1"					\
+	: "=r" (x), "=r" (temp)					\
+	:							\
+	: "memory");						\
+	})
+
+/*
+ * restore saved IRQ & FIQ state
+ */
+#define local_irq_restore(x)					\
+	__asm__ __volatile__(					\
+	"msr	cpsr_c, %0		@ local_irq_restore\n"	\
+	:							\
+	: "r" (x)						\
+	: "memory")
+
+#define __save_flags_cli(x) local_irq_save(x)
+#define __restore_flags(x) local_irq_restore(x)
+
+typedef struct { volatile int counter; } atomic_t;
+
+#define ATOMIC_INIT(i)	{ (i) }
+
+#define atomic_read(v)	((v)->counter)
+#define atomic_set(v,i)	(((v)->counter) = (i))
+
+static __inline__ void atomic_add(int i, volatile atomic_t *v)
+{
+	unsigned long flags;
+
+	__save_flags_cli(flags);
+	v->counter += i;
+	__restore_flags(flags);
+}
+
+static __inline__ void atomic_sub(int i, volatile atomic_t *v)
+{
+	unsigned long flags;
+
+	__save_flags_cli(flags);
+	v->counter -= i;
+	__restore_flags(flags);
+}
+
+static __inline__ void atomic_inc(volatile atomic_t *v)
+{
+	unsigned long flags;
+
+	__save_flags_cli(flags);
+	v->counter += 1;
+	__restore_flags(flags);
+}
+
+static __inline__ void atomic_dec(volatile atomic_t *v)
+{
+	unsigned long flags;
+
+	__save_flags_cli(flags);
+	v->counter -= 1;
+	__restore_flags(flags);
+}
+
+static __inline__ int atomic_dec_and_test(volatile atomic_t *v)
+{
+	unsigned long flags;
+	int result;
+
+	__save_flags_cli(flags);
+	v->counter -= 1;
+	result = (v->counter == 0);
+	__restore_flags(flags);
+
+	return result;
+}
+
+static inline int atomic_add_negative(int i, volatile atomic_t *v)
+{
+	unsigned long flags;
+	int result;
+
+	__save_flags_cli(flags);
+	v->counter += i;
+	result = (v->counter < 0);
+	__restore_flags(flags);
+
+	return result;
+}
+
+static __inline__ void atomic_clear_mask(unsigned long mask, unsigned long *addr)
+{
+	unsigned long flags;
+
+	__save_flags_cli(flags);
+	*addr &= ~mask;
+	__restore_flags(flags);
+}
+
+#define mb() __asm__ __volatile__ ("" : : : "memory")
+#define rmb() mb()
+#define wmb() mb()
+
+#else
+
 #warning libs/pbd has no implementation of strictly atomic operations for your hardware.
 
 #define __NO_STRICT_ATOMIC
@@ -1231,6 +1353,7 @@
 }
 
 #  endif /* __NO_STRICT_ATOMIC */
+#  endif /* arm */
 #  endif /* m68k */
 #  endif /* mips */
 #  endif /* s390 */