X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Falpha-linux-os.c;h=e8e8ec0bef74e3019441517a719932c59fd6ed62;hb=57500f8641535b9b958abe1e8b65863941becf4f;hp=3cb67b3262b2942ac6da44aa1b843757fd5963ed;hpb=e48026257ea92807b2a5ee799476be198fc64dd6;p=sbcl.git

diff --git a/src/runtime/alpha-linux-os.c b/src/runtime/alpha-linux-os.c
index 3cb67b3..e8e8ec0 100644
--- a/src/runtime/alpha-linux-os.c
+++ b/src/runtime/alpha-linux-os.c
@@ -34,38 +34,43 @@
 #include <sys/time.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <asm/fpu.h>
 
 #include "validate.h"
 size_t os_vm_page_size;
 
-#if defined GENCGC		/* unlikely ... */
-#error SBCL Alpha does not work with the GENCGC
-#include "gencgc.h"
+#ifdef LISP_FEATURE_SB_THREAD
+#error "Define threading support functions"
+#else
+struct thread *arch_os_get_current_thread() {
+    return all_threads;
+}
+int arch_os_thread_init(struct thread *thread) {
+    return 1;			/* success */
+}
+int arch_os_thread_cleanup(struct thread *thread) {
+    return 1;			/* success */
+}
 #endif
 
-sigcontext_register_t   *
+
+os_context_register_t   *
 os_context_register_addr(os_context_t *context, int offset)
 {
     return &context->uc_mcontext.sc_regs[offset];
 }
 
-sigcontext_register_t *
-os_context_fpregister_addr(os_context_t *context, int offset)
+os_context_register_t *
+os_context_float_register_addr(os_context_t *context, int offset)
 {
     return &context->uc_mcontext.sc_fpregs[offset];
 }
 
-sigcontext_register_t *
+os_context_register_t *
 os_context_pc_addr(os_context_t *context)
 {
     return &((context->uc_mcontext).sc_pc);
 }
-sigcontext_register_t *
-os_context_sp_addr(os_context_t *context)
-{
-    lose("This was supposed to be an x86-only operation");
-    return 0;
-}
 
 sigset_t *
 os_context_sigmask_addr(os_context_t *context)
@@ -73,6 +78,29 @@ os_context_sigmask_addr(os_context_t *context)
     return &context->uc_sigmask;
 }
 
+unsigned long
+os_context_fp_control(os_context_t *context)
+{
+    return ieee_fpcr_to_swcr((context->uc_mcontext).sc_fpcr);
+}
+
+void
+os_restore_fp_control(os_context_t *context)
+{
+    /* FIXME (in two parts):
+       Firstly, what happens in alpha linux inside the signal handler?
+       Does the floating point control state get cleared as in other
+       Linuxes?
+    
+       Secondly, how do we put it back if so? It will probably involve
+       something to do with
+    
+       context->uc_mcontext.sc_fpcr
+
+       (maybe a simple assembly statement will be enough)
+    */ 
+}
+
 void os_flush_icache(os_vm_address_t address, os_vm_size_t length)
 {
     asm volatile ("imb" : : : "memory" );