Hey,
Thanks for your answer!
Diffs for src/common/atomic.h and src/common/RTMath.cpp are in attachment.
Hope the format is ok...
I'm working on a "hardware" sampler, to be used with a MIDI keyboard, and
easily suitable for rehearsals and shows (= not a computer). I started by
making a C (SDL, alsa) program from scratch, but I saw Linuxsampler was
already doing better. Only drawback: its minimum buffer length is 1024 on
RPi, vs 512 for my own program... Don't know why, as ALSA PCM should be
lower-level and faster than SDL...
Cheers,
Benoît
2014-09-29 12:33 GMT+02:00 raf <rmouney...@gmail.com>:
> Hello,
> you can send the diff for the two files here, Christian should grab them
> one day.
>
> what project are you working on ? (i'm interstingly curious)
>
> Raphaël
> 06 89 85 58 81
> http://www.jerashmusic.fr
>
>
> Le 26 sept. 2014 à 17:56, Benoît Guchet <benoit.guc...@gmail.com> a écrit
> :
>
> > Hi,
> >
> > I made a working fix for LinuxSampler to support ARM11 processors.
> > Only 2 files changed.
> > How could I submit it, so that somebody can review it and/or commit it?
> Here? On Bugzilla?
> >
> > Many thanks!
> > BG
> >
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>
--
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Index: RTMath.cpp
===================================================================
--- RTMath.cpp (revision 2676)
+++ RTMath.cpp (working copy)
@@ -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 +74,11 @@
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!"
Index: src/common/atomic.h
===================================================================
--- src/common/atomic.h (revision 2676)
+++ src/common/atomic.h (working copy)
@@ -1186,7 +1186,128 @@
#endif /* __ARCH_M68K_ATOMIC __ */
#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 +1352,7 @@
}
# endif /* __NO_STRICT_ATOMIC */
+# endif /* arm */
# endif /* m68k */
# endif /* mips */
# endif /* s390 */
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