rs6000: wm -> wa+p8v

	* config/rs6000/constraints.md (define_register_constraint "wm"):
	Delete.
	* config/rs6000/rs6000.h (enum r6000_reg_class_enum): Delete
	RS6000_CONSTRAINT_wm.
	* config/rs6000/rs6000.c (rs6000_debug_reg_global): Adjust.
	(rs6000_init_hard_regno_mode_ok): Adjust.
	* config/rs6000/vsx.md: Replace "wm" constraint by "wa" with "p8v".
	* doc/md.texi (Machine Constraints): Adjust.

From-SVN: r271486

gcc/ChangeLog

 2019-05-21  Segher Boessenkool  <segher@kernel.crashing.org>
 
+	* config/rs6000/constraints.md (define_register_constraint "wm"):
+	Delete.
+	* config/rs6000/rs6000.h (enum r6000_reg_class_enum): Delete
+	RS6000_CONSTRAINT_wm.
+	* config/rs6000/rs6000.c (rs6000_debug_reg_global): Adjust.
+	(rs6000_init_hard_regno_mode_ok): Adjust.
+	* config/rs6000/vsx.md: Replace "wm" constraint by "wa" with "p8v".
+	* doc/md.texi (Machine Constraints): Adjust.
+
+2019-05-21  Segher Boessenkool  <segher@kernel.crashing.org>
+
 	* config/rs6000/constraints.md (define_register_constraint "wk"):
 	Delete.
 	* config/rs6000/rs6000.h (enum r6000_reg_class_enum): Delete

gcc/config/rs6000/constraints.md

@@ -77,12 +77,9 @@
 (define_register_constraint "wl" "rs6000_constraints[RS6000_CONSTRAINT_wl]"
   "Floating point register if the LFIWAX instruction is enabled or NO_REGS.")
 
-(define_register_constraint "wm" "rs6000_constraints[RS6000_CONSTRAINT_wm]"
-  "VSX register if direct move instructions are enabled, or NO_REGS.")
-
 ;; NO_REGs register constraint, used to merge mov{sd,sf}, since movsd can use
 ;; direct move directly, and movsf can't to move between the register sets.
-;; There is a mode_attr that resolves to wm for SDmode and wn for SFmode
+;; There is a mode_attr that resolves to wa for SDmode and wn for SFmode
 (define_register_constraint "wn" "NO_REGS" "No register (NO_REGS).")
 
 (define_register_constraint "wp" "rs6000_constraints[RS6000_CONSTRAINT_wp]"

gcc/config/rs6000/rs6000.c

@@ -2514,7 +2514,6 @@ rs6000_debug_reg_global (void)
 	   "wg reg_class = %s\n"
 	   "wi reg_class = %s\n"
 	   "wl reg_class = %s\n"
-	   "wm reg_class = %s\n"
 	   "wp reg_class = %s\n"
 	   "wq reg_class = %s\n"
 	   "wr reg_class = %s\n"
@@ -2536,7 +2535,6 @@ rs6000_debug_reg_global (void)
 	   reg_class_names[rs6000_constraints[RS6000_CONSTRAINT_wg]],
 	   reg_class_names[rs6000_constraints[RS6000_CONSTRAINT_wi]],
 	   reg_class_names[rs6000_constraints[RS6000_CONSTRAINT_wl]],
-	   reg_class_names[rs6000_constraints[RS6000_CONSTRAINT_wm]],
 	   reg_class_names[rs6000_constraints[RS6000_CONSTRAINT_wp]],
 	   reg_class_names[rs6000_constraints[RS6000_CONSTRAINT_wq]],
 	   reg_class_names[rs6000_constraints[RS6000_CONSTRAINT_wr]],
@@ -3159,7 +3157,6 @@ rs6000_init_hard_regno_mode_ok (bool global_init_p)
 	wg - Float register for power6x move insns.
 	wi - FP or VSX register to hold 64-bit integers for VSX insns.
 	wl - Float register if we can do 32-bit signed int loads.
-	wm - VSX register for ISA 2.07 direct move operations.
 	wn - always NO_REGS.
 	wr - GPR if 64-bit mode is permitted.
 	ws - Register class to do ISA 2.06 DF operations.
@@ -3197,9 +3194,6 @@ rs6000_init_hard_regno_mode_ok (bool global_init_p)
   if (TARGET_LFIWAX)
     rs6000_constraints[RS6000_CONSTRAINT_wl] = FLOAT_REGS;	/* DImode  */
 
-  if (TARGET_DIRECT_MOVE)
-    rs6000_constraints[RS6000_CONSTRAINT_wm] = VSX_REGS;
-
   if (TARGET_POWERPC64)
     {
       rs6000_constraints[RS6000_CONSTRAINT_wr] = GENERAL_REGS;

gcc/config/rs6000/rs6000.h

@@ -1255,7 +1255,6 @@ enum r6000_reg_class_enum {
   RS6000_CONSTRAINT_wg,		/* FPR register for -mmfpgpr */
   RS6000_CONSTRAINT_wi,		/* FPR/VSX register to hold DImode */
   RS6000_CONSTRAINT_wl,		/* FPR register for LFIWAX */
-  RS6000_CONSTRAINT_wm,		/* VSX register for direct move */
   RS6000_CONSTRAINT_wp,		/* VSX reg for IEEE 128-bit fp TFmode. */
   RS6000_CONSTRAINT_wq,		/* VSX reg for IEEE 128-bit fp KFmode.  */
   RS6000_CONSTRAINT_wr,		/* GPR register if 64-bit  */

gcc/config/rs6000/vsx.md

@@ -3198,10 +3198,8 @@
 
 (define_insn "vsx_extract_<mode>"
   [(set (match_operand:<VS_scalar> 0 "gpc_reg_operand" "=d,    d,     wr, wr")
-
 	(vec_select:<VS_scalar>
-	 (match_operand:VSX_D 1 "gpc_reg_operand"      "<VSa>, <VSa>, wm, wa")
-
+	 (match_operand:VSX_D 1 "gpc_reg_operand"      "<VSa>, <VSa>, wa, wa")
 	 (parallel
 	  [(match_operand:QI 2 "const_0_to_1_operand"  "wD,    n,     wD, n")])))]
   "VECTOR_MEM_VSX_P (<MODE>mode)"
@@ -3250,7 +3248,7 @@
     gcc_unreachable ();
 }
   [(set_attr "type" "veclogical,mftgpr,mftgpr,vecperm")
-   (set_attr "isa" "*,*,*,p9v")])
+   (set_attr "isa" "*,*,p8v,p9v")])
 
 ;; Optimize extracting a single scalar element from memory.
 (define_insn_and_split "*vsx_extract_<P:mode>_<VSX_D:mode>_load"

gcc/doc/md.texi

@@ -3198,7 +3198,7 @@ Any VSX register if the @option{-mvsx} option was used or NO_REGS.
 
 When using any of the register constraints (@code{wa}, @code{wd},
 @code{wf}, @code{wg}, @code{wi},
-@code{wl}, @code{wm}, @code{wp}, @code{wq}, @code{ws},
+@code{wl}, @code{wp}, @code{wq}, @code{ws},
 @code{wt}, @code{wv}, or @code{ww})
 that take VSX registers, you must use @code{%x<n>} in the template so
 that the correct register is used.  Otherwise the register number
@@ -3265,9 +3265,6 @@ FP or VSX register to hold 64-bit integers for VSX insns or NO_REGS.
 @item wl
 Floating point register if the LFIWAX instruction is enabled or NO_REGS.
 
-@item wm
-VSX register if direct move instructions are enabled, or NO_REGS.
-
 @item wn
 No register (NO_REGS).