loongarch64_linuxsampler_patch

linuxsampler_loongarch64.patch

--- a/src/common/RTMath.cpp	2021-12-25 18:37:48.733719298 +0800
+++ b/src/common/RTMath.cpp	2021-12-25 21:54:21.914927577 +0800
@@ -73,6 +73,10 @@
     return t;
     #elif defined(__APPLE__)
     return (time_stamp_t) mach_absolute_time();
+    #elif defined(__loongarch64)
+    uint64_t t;
+    __asm__ __volatile__ ("rdtime.d %0, $zero":"=r"(t));
+    return time_stamp_t(t>>8);
     #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!"
--- a/linuxsampler/src/common/atomic.h	2021-12-29 04:22:34.535260312 +0800
+++ b/linuxsampler/src/common/atomic.h	2021-12-29 03:43:41.403752006 +0800
@@ -1186,6 +1186,63 @@
 #endif /* __ARCH_M68K_ATOMIC __ */
 
 #else
+#ifdef __loongarch64
+
+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)
+{
+ __asm__ __volatile__(
+ "amadd_db.w $zero, %1, %0"
+ :"+ZB" (v->counter)
+ :"r"(i)
+ :"memory");
+}
+
+static __inline__ void atomic_sub(int i, volatile atomic_t *v)
+{
+ __asm__ __volatile__(
+ "amadd_db.w $zero, %1, %0"
+ :"+ZB" (v->counter)
+ :"r"(-i)
+ :"memory");
+}
+
+#define atomic_inc(v) (atomic_add(1, (v)))
+#define atomic_dec(v) (atomic_sub(1, (v)))
+
+static __inline__ int haha(int i, volatile atomic_t *v)
+{
+ int result;
+ __asm__ __volatile__(
+ "amadd_db.w %1, %2, %0"
+ :"+ZB"(v->counter),"=&r"(result)
+ :"r"(-i)
+ :"memory");
+ return (result-i)==0;
+}
+#define atomic_dec_and_test(v) haha(1,(v))
+
+static inline int atomic_add_negative(int i, volatile atomic_t *v)
+{
+ int result;
+ __asm__ __volatile__(
+ "amadd_db.w %1, %2, %0"
+ :"+ZB"(v->counter),"=&r"(result)
+ :"r"(i)
+ :"memory");
+ return (result+i)<0;
+}
+
+#define mb() __asm__ __volatile__("dbar 0" : : : "memory")
+#define rmb() mb()
+#define wmb() mb()
+
+#else
 
 #warning libs/pbd has no implementation of strictly atomic operations for your hardware.
 
@@ -1231,6 +1288,7 @@
 }
 
 #  endif /* __NO_STRICT_ATOMIC */
+#  endif /* loongarch64 */
 #  endif /* m68k */
 #  endif /* mips */
 #  endif /* s390 */
@@ -1288,3 +1346,4 @@
 
 #endif /* linux */
 #endif /* __linuxsampler_atomic_h__ */
+