rs6000.c (direct_return): Check if we are saving altivec registers.

	* rs6000.c (direct_return): Check if we are saving altivec
	registers.
	(first_altivec_reg_to_save): New.
	Updated stack frame layout comments.
	(rs6000_stack_info): Calculate altivec register save size.
	Save link register if we saved some altivec registers.
	(rs6000_stack_info): Align save size to 16 if altivec abi or
	abi_darwin.
	(rs6000_stack_info): Calculate altivec register offsets.
	(rs6000_stack_info): Add altivec info to save_size.
	(debug_stack_info): Add altivec debug info.
	(rs6000_emit_prologue): Save altivec registers and vrsave.
	(compute_vrsave_mask): New.
	(altivec_expand_builtin): Remove unused variables.
	(rs6000_parse_abi_options): Add static qualifier.
	(rs6000_expand_builtin): Remove unused parameters.
	(altivec_expand_builtin): Cast bdesc_2arg to get rid of warning.
	(altivec_init_builtins): Same.
	(is_altivec_return_reg): New.
	(vrsave_operation): New.
	(ALTIVEC_REG_BIT): New.
	(generate_set_vrsave): New.

	* rs6000.md (get_vrsave): New.
	(set_vrsave): New.
	(*set_vrsave_internal): New.

	* rs6000.h (rs6000_stack): Add first_altivec_reg_save,
	altivec_save_offset, vrsave_save_offset, altive_size, vrsave_size,
	altivec_padding_size, vrsave_mask.
	(TOTAL_ALTIVEC_REGS): New.
	(EPILOGUE_USES): Add VRSAVE_REGNO.

From-SVN: r47228

gcc/ChangeLog

+2001-11-15  Aldy Hernandez  <aldyh@redhat.com>
+
+	* rs6000.c (direct_return): Check if we are saving altivec
+	registers.
+	(first_altivec_reg_to_save): New.
+	Updated stack frame layout comments.
+	(rs6000_stack_info): Calculate altivec register save size.
+	Save link register if we saved some altivec registers.
+	(rs6000_stack_info): Align save size to 16 if altivec abi or
+	abi_darwin.
+	(rs6000_stack_info): Calculate altivec register offsets.
+	(rs6000_stack_info): Add altivec info to save_size.
+	(debug_stack_info): Add altivec debug info.
+	(rs6000_emit_prologue): Save altivec registers and vrsave.
+	(compute_vrsave_mask): New.
+	(altivec_expand_builtin): Remove unused variables.
+	(rs6000_parse_abi_options): Add static qualifier.
+	(rs6000_expand_builtin): Remove unused parameters.
+	(altivec_expand_builtin): Cast bdesc_2arg to get rid of warning.
+	(altivec_init_builtins): Same.
+	(is_altivec_return_reg): New.
+	(vrsave_operation): New.
+	(ALTIVEC_REG_BIT): New.
+	(generate_set_vrsave): New.
+
+	* rs6000.md (get_vrsave): New.
+	(set_vrsave): New.
+	(*set_vrsave_internal): New.
+
+	* rs6000.h (rs6000_stack): Add first_altivec_reg_save,
+	altivec_save_offset, vrsave_save_offset, altive_size, vrsave_size,
+	altivec_padding_size, vrsave_mask.
+	(TOTAL_ALTIVEC_REGS): New.
+	(EPILOGUE_USES): Add VRSAVE_REGNO.
+
 2001-11-20  Jeff Law <law@redhat.com>
 
 	* unroll.c (copy_loop_body): Update LABEL_NUSES for the

gcc/config/rs6000/rs6000.h

@@ -736,6 +736,7 @@ extern int rs6000_debug_arg;		/* debug argument handling */
 #define XER_REGNO    76
 #define FIRST_ALTIVEC_REGNO	77
 #define LAST_ALTIVEC_REGNO	108
+#define TOTAL_ALTIVEC_REGS	(LAST_ALTIVEC_REGNO - FIRST_ALTIVEC_REGNO)
 #define VRSAVE_REGNO		109
 
 /* List the order in which to allocate registers.  Each register must be
@@ -1265,16 +1266,20 @@ extern enum rs6000_abi rs6000_current_abi;	/* available for use by subtarget */
 typedef struct rs6000_stack {
   int first_gp_reg_save;	/* first callee saved GP register used */
   int first_fp_reg_save;	/* first callee saved FP register used */
+  int first_altivec_reg_save;	/* first callee saved AltiVec register used */
   int lr_save_p;		/* true if the link reg needs to be saved */
   int cr_save_p;		/* true if the CR reg needs to be saved */
+  unsigned int vrsave_mask;	/* mask of vec registers to save */
   int toc_save_p;		/* true if the TOC needs to be saved */
   int push_p;			/* true if we need to allocate stack space */
   int calls_p;			/* true if the function makes any calls */
   enum rs6000_abi abi;		/* which ABI to use */
   int gp_save_offset;		/* offset to save GP regs from initial SP */
   int fp_save_offset;		/* offset to save FP regs from initial SP */
+  int altivec_save_offset;	/* offset to save AltiVec regs from inital SP */
   int lr_save_offset;		/* offset to save LR from initial SP */
   int cr_save_offset;		/* offset to save CR from initial SP */
+  int vrsave_save_offset;	/* offset to save VRSAVE from initial SP */
   int toc_save_offset;		/* offset to save the TOC pointer */
   int varargs_save_offset;	/* offset to save the varargs registers */
   int ehrd_offset;		/* offset to EH return data */
@@ -1286,8 +1291,12 @@ typedef struct rs6000_stack {
   int fixed_size;		/* fixed size of stack frame */
   int gp_size;			/* size of saved GP registers */
   int fp_size;			/* size of saved FP registers */
+  int altivec_size;		/* size of saved AltiVec registers */
   int cr_size;			/* size to hold CR if not in save_size */
   int lr_size;			/* size to hold LR if not in save_size */
+  int vrsave_size;		/* size to hold VRSAVE if not in save_size */
+  int altivec_padding_size;	/* size of altivec alignment padding if
+				   not in save_size */
   int toc_size;			/* size to hold TOC if not in save_size */
   int total_size;		/* total bytes allocated for stack */
 } rs6000_stack_t;
@@ -1685,6 +1694,7 @@ typedef struct rs6000_args
 
 #define	EPILOGUE_USES(REGNO)					\
   ((reload_completed && (REGNO) == LINK_REGISTER_REGNUM)	\
+   || (REGNO) == VRSAVE_REGNO					\
    || (current_function_calls_eh_return				\
        && TARGET_AIX						\
        && (REGNO) == TOC_REGISTER))
@@ -2792,6 +2802,7 @@ do {									\
 		     CONST_DOUBLE, SYMBOL_REF}},			   \
   {"load_multiple_operation", {PARALLEL}},				   \
   {"store_multiple_operation", {PARALLEL}},				   \
+  {"vrsave_operation", {PARALLEL}},					   \
   {"branch_comparison_operator", {EQ, NE, LE, LT, GE,			   \
 				  GT, LEU, LTU, GEU, GTU,		   \
 				  UNORDERED, ORDERED,			   \

gcc/config/rs6000/rs6000.md

@@ -13622,6 +13622,31 @@
    vor %0,%1,%1"
   [(set_attr "type" "altivec")])
 
+;; Copy VRSAVE into a GPR.
+(define_insn "get_vrsave"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+	(unspec:SI [(reg:SI 109)] 28))]
+  "TARGET_ALTIVEC"
+  "mfvrsave %0"
+  [(set_attr "type" "altivec")])
+
+(define_insn "*set_vrsave_internal"
+  [(match_parallel 0 "vrsave_operation"
+     [(set (reg:SI 109)
+	   (unspec:SI [(match_operand:SI 1 "register_operand" "r")
+		       (reg:SI 109)] 30))])]
+  "TARGET_ALTIVEC"
+  "mtvrsave %1"
+  [(set_attr "type" "altivec")])
+
+(define_insn "set_vrsave"
+  [(set (reg:SI 109)
+	(unspec:SI [(match_operand:SI 0 "register_operand" "r")
+		    (reg:SI 109)] 30))]
+  "TARGET_ALTIVEC"
+  "mtvrsave %0"
+  [(set_attr "type" "altivec")])
+
 ;; Simple binary operations.
 
 (define_insn "altivec_vaddubm"