$NetBSD: patch-cg,v 1.1 2001/01/10 01:28:51 briggs Exp $

--- /dev/null	Tue Jan  9 17:03:11 2001
+++ machdep/engine-powerpc-netbsd.h	Tue Jan  9 16:54:05 2001
@@ -0,0 +1,109 @@
+/* ==== machdep.h ============================================================
+ * Copyright (c) 1994 Chris Provenzano (proven@athena.mit.edu) and
+ * Ken Raeburn (raeburn@mit.edu).
+ *
+ * engine-alpha-osf1.h,v 1.4.4.1 1995/12/13 05:41:42 proven Exp
+ *
+ */
+
+#include <unistd.h>
+#include <setjmp.h>
+#include <sys/time.h>
+#include <sys/cdefs.h>
+#include <sys/signal.h>  /* for _NSIG */
+
+/*
+ * The first machine dependent functions are the SEMAPHORES
+ * needing the test and set instruction.
+ */
+#define SEMAPHORE_CLEAR 0
+#define SEMAPHORE_SET   0xffff
+
+#define SEMAPHORE_TEST_AND_SET(lock)            \
+({                                              \
+        volatile long t1, temp = SEMAPHORE_SET; \
+        __asm__ volatile(                       \
+	  "1: lwarx  %0,0,%1;			\
+	      cmpwi  %0, 0;                     \
+	      bne    2f;                        \
+	      stwcx. %2,0,%1;                   \
+	      bne-   1b;                        \
+	   2: "                                 \
+          :"=r" (t1)                            \
+          :"m" (lock), "r" (temp));             \
+        t1;                                     \
+})
+
+#define SEMAPHORE_RESET(lock)           *lock = SEMAPHORE_CLEAR
+
+/*
+ * New types
+ */
+typedef int semaphore;
+
+/*
+ * sigset_t macros
+ */
+#define        SIG_ANY(sig)            (sig)
+#define        SIGMAX                  (_NSIG-1)
+
+/*
+ * New Strutures
+ */
+struct machdep_pthread {
+    void                       *(*start_routine)(void *);
+    void                       *start_argument;
+    void                       *machdep_stack;
+    struct itimerval           machdep_timer;
+    jmp_buf	               machdep_istate;
+    unsigned long              machdep_fstate[66];
+				/* 64-bit fp regs 0-31 + fpscr */
+				/* We pretend the fpscr is 64 bits */
+};
+
+/*
+ * Static machdep_pthread initialization values.
+ * For initial thread only.
+ */
+#define MACHDEP_PTHREAD_INIT    \
+       { NULL, NULL, NULL, { { 0, 0 }, { 0, 100000 } }, { 0 }, { 0 } }
+
+/*
+ * Minimum stack size
+ */
+#define PTHREAD_STACK_MIN      2048
+
+/*
+ * Some fd flag defines that are necessary to distinguish between posix
+ * behavior and bsd4.3 behavior.
+ */
+#define __FD_NONBLOCK          O_NONBLOCK
+
+/*
+ * New functions
+ */
+
+__BEGIN_DECLS
+
+#if defined(PTHREAD_KERNEL)
+
+#define __machdep_stack_get(x)      (x)->machdep_stack
+#define __machdep_stack_set(x, y)   (x)->machdep_stack = y
+#define __machdep_stack_repl(x, y)                          \
+{                                                           \
+    if ((stack = __machdep_stack_get(x))) {                 \
+        __machdep_stack_free(stack);                        \
+    }                                                       \
+    __machdep_stack_set(x, y);                              \
+}
+
+int machdep_save_state(void);
+
+void __machdep_save_fp_state(unsigned long *);
+void __machdep_restore_fp_state(unsigned long *);
+void *__machdep_stack_alloc(size_t);
+void __machdep_stack_free(void *);
+
+#endif
+
+__END_DECLS
