Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

libgc/mips_sgi_mach_dep.s

@@ -0,0 +1,46 @@
+#include <sys/regdef.h>
+#include <sys/asm.h>
+/* This file must be preprocessed.  But the SGI assembler always does	*/
+/* that.  Furthermore, a generic preprocessor won't do, since some of	*/
+/* the SGI-supplied include files rely on behavior of the MIPS 		*/
+/* assembler.  Hence we treat and name this file as though it required	*/
+/* no preprocessing.							*/
+
+# define call_push(x)     move    $4,x;    jal     GC_push_one
+
+    .option pic2
+    .text
+/* Mark from machine registers that are saved by C compiler */
+#   define FRAMESZ 32
+#   define RAOFF FRAMESZ-SZREG
+#   define GPOFF FRAMESZ-(2*SZREG)
+    NESTED(GC_push_regs, FRAMESZ, ra)
+    .mask 0x80000000,-SZREG	# inform debugger of saved ra loc
+    move 	t0,gp
+    SETUP_GPX(t8)
+    PTR_SUBU	sp,FRAMESZ
+#   ifdef SETUP_GP64
+      SETUP_GP64(GPOFF, GC_push_regs)
+#   endif
+    SAVE_GP(GPOFF)
+    REG_S 	ra,RAOFF(sp)
+#   if (_MIPS_SIM == _MIPS_SIM_ABI32)
+    	call_push($2)
+    	call_push($3)
+#   endif
+    call_push($16)
+    call_push($17)
+    call_push($18)
+    call_push($19)
+    call_push($20)
+    call_push($21)
+    call_push($22)
+    call_push($23)
+    call_push($30)
+    REG_L	ra,RAOFF(sp)
+#   ifdef RESTORE_GP64
+      RESTORE_GP64
+#   endif
+    PTR_ADDU	sp,FRAMESZ
+    j		ra
+    .end    GC_push_regs