arm.c (arm_fp_model, [...]): Remove.

2009-11-05  Paul Brook  <paul@codesourcery.com>

	gcc/
	* config/arm/arm.c (arm_fp_model, arm_fpu_arch, arm_fpu_tune): Remove.
	(arm_fpu_desc): New.
	(all_fpus): Add FPU details.
	(fp_model_for_fpu): Remove.
	(arm_override_options): Set and use arm_fpu_desc and arm_fpu_attr.
	(arm_output_epilogue, arm_save_coproc_regs): Use TARGET_FPA_EMU2.
	(arm_file_start): Use arm_fpu_desc.
	* config/arm/arm.h (TARGET_FPA, TARGET_MAVERICK, TARGET_VFP,
	TARGET_VFPD32, TARGET_VFP3, TARGET_NEON_FP16, TARGET_NEON): Use
	arm_fpu_desc.
	(TARGET_FPA_EMU2): Define.
	(arm_fp_model, fputype, arm_fpu_tune): Remove.
	(vfp_reg_type, arm_fpu_desc): New.
	* config/arm/arm.md (attr fpu): Simplify.
	* config/arm/fpa.md (movxf_fpa): Use TARGET_FPA_EMU2.
	* config/arm/linux-elf.h (FPUTYPE_DEFAULT): Use string value.
	* config/arm/bpabi.h (FPUTYPE_DEFAULT): Use string value.
	* config/arm/netbsd-elf.h (FPUTYPE_DEFAULT): Use string value.
	* config/arm/vxworks.h (FPUTYPE_DEFAULT): Use string value.

From-SVN: r153942

gcc/ChangeLog

+2009-11-05  Paul Brook  <paul@codesourcery.com>
+
+	* config/arm/arm.c (arm_fp_model, arm_fpu_arch, arm_fpu_tune): Remove.
+	(arm_fpu_desc): New.
+	(all_fpus): Add FPU details.
+	(fp_model_for_fpu): Remove.
+	(arm_override_options): Set and use arm_fpu_desc and arm_fpu_attr.
+	(arm_output_epilogue, arm_save_coproc_regs): Use TARGET_FPA_EMU2.
+	(arm_file_start): Use arm_fpu_desc.
+	* config/arm/arm.h (TARGET_FPA, TARGET_MAVERICK, TARGET_VFP,
+	TARGET_VFPD32, TARGET_VFP3, TARGET_NEON_FP16, TARGET_NEON): Use
+	arm_fpu_desc.
+	(TARGET_FPA_EMU2): Define.
+	(arm_fp_model, fputype, arm_fpu_tune): Remove.
+	(vfp_reg_type, arm_fpu_desc): New.
+	* config/arm/arm.md (attr fpu): Simplify.
+	* config/arm/fpa.md (movxf_fpa): Use TARGET_FPA_EMU2.
+	* config/arm/linux-elf.h (FPUTYPE_DEFAULT): Use string value.
+	* config/arm/bpabi.h (FPUTYPE_DEFAULT): Use string value.
+	* config/arm/netbsd-elf.h (FPUTYPE_DEFAULT): Use string value.
+	* config/arm/vxworks.h (FPUTYPE_DEFAULT): Use string value.
+
 2009-11-05  Michael Matz  <matz@suse.de>
 
 	* config/i386/i386.c (ix86_builtin_reciprocal): Remove dependency

gcc/config/arm/arm.c

@@ -524,14 +524,11 @@ enum processor_type arm_tune = arm_none;
 /* The default processor used if not overridden by commandline.  */
 static enum processor_type arm_default_cpu = arm_none;
 
-/* Which floating point model to use.  */
-enum arm_fp_model arm_fp_model;
-
-/* Which floating point hardware is available.  */
-enum fputype arm_fpu_arch;
-
 /* Which floating point hardware to schedule for.  */
-enum fputype arm_fpu_tune;
+int arm_fpu_attr;
+
+/* Which floating popint hardware to use.  */
+const struct arm_fpu_desc *arm_fpu_desc;
 
 /* Whether to use floating point hardware.  */
 enum float_abi_type arm_float_abi;
@@ -809,46 +806,21 @@ static struct arm_cpu_select arm_select[] =
 
 char arm_arch_name[] = "__ARM_ARCH_0UNK__";
 
-struct fpu_desc
-{
-  const char * name;
-  enum fputype fpu;
-};
-
-
 /* Available values for -mfpu=.  */
 
-static const struct fpu_desc all_fpus[] =
-{
-  {"fpa",		FPUTYPE_FPA},
-  {"fpe2",		FPUTYPE_FPA_EMU2},
-  {"fpe3",		FPUTYPE_FPA_EMU2},
-  {"maverick",		FPUTYPE_MAVERICK},
-  {"vfp",		FPUTYPE_VFP},
-  {"vfp3",		FPUTYPE_VFP3},
-  {"vfpv3",		FPUTYPE_VFP3},
-  {"vfpv3-d16",		FPUTYPE_VFP3D16},
-  {"neon",		FPUTYPE_NEON},
-  {"neon-fp16",		FPUTYPE_NEON_FP16}
-};
-
-
-/* Floating point models used by the different hardware.
-   See fputype in arm.h.  */
-
-static const enum arm_fp_model fp_model_for_fpu[] =
-{
-  /* No FP hardware.  */
-  ARM_FP_MODEL_UNKNOWN,		/* FPUTYPE_NONE  */
-  ARM_FP_MODEL_FPA,		/* FPUTYPE_FPA  */
-  ARM_FP_MODEL_FPA,		/* FPUTYPE_FPA_EMU2  */
-  ARM_FP_MODEL_FPA,		/* FPUTYPE_FPA_EMU3  */
-  ARM_FP_MODEL_MAVERICK,	/* FPUTYPE_MAVERICK  */
-  ARM_FP_MODEL_VFP,		/* FPUTYPE_VFP  */
-  ARM_FP_MODEL_VFP,		/* FPUTYPE_VFP3D16  */
-  ARM_FP_MODEL_VFP,		/* FPUTYPE_VFP3  */
-  ARM_FP_MODEL_VFP,		/* FPUTYPE_NEON  */
-  ARM_FP_MODEL_VFP		/* FPUTYPE_NEON_FP16  */
+static const struct arm_fpu_desc all_fpus[] =
+{
+  {"fpa",		ARM_FP_MODEL_FPA, 0, 0, false, false},
+  {"fpe2",		ARM_FP_MODEL_FPA, 2, 0, false, false},
+  {"fpe3",		ARM_FP_MODEL_FPA, 3, 0, false, false},
+  {"maverick",		ARM_FP_MODEL_MAVERICK, 0, 0, false, false},
+  {"vfp",		ARM_FP_MODEL_VFP, 2, VFP_REG_D16, false, false},
+  {"vfpv3",		ARM_FP_MODEL_VFP, 3, VFP_REG_D32, false, false},
+  {"vfpv3-d16",		ARM_FP_MODEL_VFP, 3, VFP_REG_D16, false, false},
+  {"neon",		ARM_FP_MODEL_VFP, 3, VFP_REG_D32, true , false},
+  {"neon-fp16",		ARM_FP_MODEL_VFP, 3, VFP_REG_D32, true , true },
+  /* Compatibility aliases.  */
+  {"vfp3",		ARM_FP_MODEL_VFP, 3, VFP_REG_D32, false, false},
 };
 
 
@@ -1615,7 +1587,6 @@ arm_override_options (void)
   if (TARGET_IWMMXT_ABI && !TARGET_IWMMXT)
     error ("iwmmxt abi requires an iwmmxt capable cpu");
 
-  arm_fp_model = ARM_FP_MODEL_UNKNOWN;
   if (target_fpu_name == NULL && target_fpe_name != NULL)
     {
       if (streq (target_fpe_name, "2"))
@@ -1626,46 +1597,52 @@ arm_override_options (void)
 	error ("invalid floating point emulation option: -mfpe=%s",
 	       target_fpe_name);
     }
-  if (target_fpu_name != NULL)
-    {
-      /* The user specified a FPU.  */
-      for (i = 0; i < ARRAY_SIZE (all_fpus); i++)
-	{
-	  if (streq (all_fpus[i].name, target_fpu_name))
-	    {
-	      arm_fpu_arch = all_fpus[i].fpu;
-	      arm_fpu_tune = arm_fpu_arch;
-	      arm_fp_model = fp_model_for_fpu[arm_fpu_arch];
-	      break;
-	    }
-	}
-      if (arm_fp_model == ARM_FP_MODEL_UNKNOWN)
-	error ("invalid floating point option: -mfpu=%s", target_fpu_name);
-    }
-  else
+
+  if (target_fpu_name == NULL)
     {
 #ifdef FPUTYPE_DEFAULT
-      /* Use the default if it is specified for this platform.  */
-      arm_fpu_arch = FPUTYPE_DEFAULT;
-      arm_fpu_tune = FPUTYPE_DEFAULT;
+      target_fpu_name = FPUTYPE_DEFAULT;
 #else
-      /* Pick one based on CPU type.  */
-      /* ??? Some targets assume FPA is the default.
-      if ((insn_flags & FL_VFP) != 0)
-	arm_fpu_arch = FPUTYPE_VFP;
-      else
-      */
       if (arm_arch_cirrus)
-	arm_fpu_arch = FPUTYPE_MAVERICK;
+	target_fpu_name = "maverick";
       else
-	arm_fpu_arch = FPUTYPE_FPA_EMU2;
+	target_fpu_name = "fpe2";
 #endif
-      if (tune_flags & FL_CO_PROC && arm_fpu_arch == FPUTYPE_FPA_EMU2)
-	arm_fpu_tune = FPUTYPE_FPA;
+    }
+
+  arm_fpu_desc = NULL;
+  for (i = 0; i < ARRAY_SIZE (all_fpus); i++)
+    {
+      if (streq (all_fpus[i].name, target_fpu_name))
+	{
+	  arm_fpu_desc = &all_fpus[i];
+	  break;
+	}
+    }
+  if (!arm_fpu_desc)
+    error ("invalid floating point option: -mfpu=%s", target_fpu_name);
+
+  switch (arm_fpu_desc->model)
+    {
+    case ARM_FP_MODEL_FPA:
+      if (arm_fpu_desc->rev == 2)
+	arm_fpu_attr = FPU_FPE2;
+      else if (arm_fpu_desc->rev == 3)
+	arm_fpu_attr = FPU_FPE3;
       else
-	arm_fpu_tune = arm_fpu_arch;
-      arm_fp_model = fp_model_for_fpu[arm_fpu_arch];
-      gcc_assert (arm_fp_model != ARM_FP_MODEL_UNKNOWN);
+	arm_fpu_attr = FPU_FPA;
+      break;
+
+    case ARM_FP_MODEL_MAVERICK:
+      arm_fpu_attr = FPU_MAVERICK;
+      break;
+
+    case ARM_FP_MODEL_VFP:
+      arm_fpu_attr = FPU_VFP;
+      break;
+
+    default:
+      gcc_unreachable();
     }
 
   if (target_float_abi_name != NULL)
@@ -1687,7 +1664,7 @@ arm_override_options (void)
     arm_float_abi = TARGET_DEFAULT_FLOAT_ABI;
 
   if (TARGET_AAPCS_BASED
-      && (arm_fp_model == ARM_FP_MODEL_FPA))
+      && (arm_fpu_desc->model == ARM_FP_MODEL_FPA))
     error ("FPA is unsupported in the AAPCS");
 
   if (TARGET_AAPCS_BASED)
@@ -1715,7 +1692,7 @@ arm_override_options (void)
 
   /* If soft-float is specified then don't use FPU.  */
   if (TARGET_SOFT_FLOAT)
-    arm_fpu_arch = FPUTYPE_NONE;
+    arm_fpu_attr = FPU_NONE;
 
   if (TARGET_AAPCS_BASED)
     {
@@ -1742,8 +1719,7 @@ arm_override_options (void)
   /* For arm2/3 there is no need to do any scheduling if there is only
      a floating point emulator, or we are doing software floating-point.  */
   if ((TARGET_SOFT_FLOAT
-       || arm_fpu_tune == FPUTYPE_FPA_EMU2
-       || arm_fpu_tune == FPUTYPE_FPA_EMU3)
+       || (TARGET_FPA && arm_fpu_desc->rev))
       && (tune_flags & FL_MODE32) == 0)
     flag_schedule_insns = flag_schedule_insns_after_reload = 0;
 
@@ -13305,7 +13281,7 @@ arm_output_epilogue (rtx sibling)
       /* This variable is for the Virtual Frame Pointer, not VFP regs.  */
       int vfp_offset = offsets->frame;
 
-      if (arm_fpu_arch == FPUTYPE_FPA_EMU2)
+      if (TARGET_FPA_EMU2)
 	{
 	  for (reg = LAST_FPA_REGNUM; reg >= FIRST_FPA_REGNUM; reg--)
 	    if (df_regs_ever_live_p (reg) && !call_used_regs[reg])
@@ -13528,7 +13504,7 @@ arm_output_epilogue (rtx sibling)
 			 SP_REGNUM, HARD_FRAME_POINTER_REGNUM);
 	}
 
-      if (arm_fpu_arch == FPUTYPE_FPA_EMU2)
+      if (TARGET_FPA_EMU2)
 	{
 	  for (reg = FIRST_FPA_REGNUM; reg <= LAST_FPA_REGNUM; reg++)
 	    if (df_regs_ever_live_p (reg) && !call_used_regs[reg])
@@ -14254,7 +14230,7 @@ arm_save_coproc_regs(void)
 
   /* Save any floating point call-saved registers used by this
      function.  */
-  if (arm_fpu_arch == FPUTYPE_FPA_EMU2)
+  if (TARGET_FPA_EMU2)
     {
       for (reg = LAST_FPA_REGNUM; reg >= FIRST_FPA_REGNUM; reg--)
 	if (df_regs_ever_live_p (reg) && !call_used_regs[reg])
@@ -19736,45 +19712,8 @@ arm_file_start (void)
 	}
       else
 	{
-	  int set_float_abi_attributes = 0;
-	  switch (arm_fpu_arch)
-	    {
-	    case FPUTYPE_FPA:
-	      fpu_name = "fpa";
-	      break;
-	    case FPUTYPE_FPA_EMU2:
-	      fpu_name = "fpe2";
-	      break;
-	    case FPUTYPE_FPA_EMU3:
-	      fpu_name = "fpe3";
-	      break;
-	    case FPUTYPE_MAVERICK:
-	      fpu_name = "maverick";
-	      break;
-	    case FPUTYPE_VFP:
-	      fpu_name = "vfp";
-	      set_float_abi_attributes = 1;
-	      break;
-	    case FPUTYPE_VFP3D16:
-	      fpu_name = "vfpv3-d16";
-	      set_float_abi_attributes = 1;
-	      break;
-	    case FPUTYPE_VFP3:
-	      fpu_name = "vfpv3";
-	      set_float_abi_attributes = 1;
-	      break;
-	    case FPUTYPE_NEON:
-	      fpu_name = "neon";
-	      set_float_abi_attributes = 1;
-	      break;
-	    case FPUTYPE_NEON_FP16:
-	      fpu_name = "neon-fp16";
-	      set_float_abi_attributes = 1;
-	      break;
-	    default:
-	      abort();
-	    }
-	  if (set_float_abi_attributes)
+	  fpu_name = arm_fpu_desc->name;
+	  if (arm_fpu_desc->model == ARM_FP_MODEL_VFP)
 	    {
 	      if (TARGET_HARD_FLOAT)
 		asm_fprintf (asm_out_file, "\t.eabi_attribute 27, 3\n");

gcc/config/arm/arm.h

@@ -190,9 +190,9 @@ extern void (*arm_lang_output_object_attributes_hook)(void);
 #define TARGET_HARD_FLOAT		(arm_float_abi != ARM_FLOAT_ABI_SOFT)
 /* Use hardware floating point calling convention.  */
 #define TARGET_HARD_FLOAT_ABI		(arm_float_abi == ARM_FLOAT_ABI_HARD)
-#define TARGET_FPA			(arm_fp_model == ARM_FP_MODEL_FPA)
-#define TARGET_MAVERICK			(arm_fp_model == ARM_FP_MODEL_MAVERICK)
-#define TARGET_VFP			(arm_fp_model == ARM_FP_MODEL_VFP)
+#define TARGET_FPA		(arm_fpu_desc->model == ARM_FP_MODEL_FPA)
+#define TARGET_MAVERICK		(arm_fpu_desc->model == ARM_FP_MODEL_MAVERICK)
+#define TARGET_VFP		(arm_fpu_desc->model == ARM_FP_MODEL_VFP)
 #define TARGET_IWMMXT			(arm_arch_iwmmxt)
 #define TARGET_REALLY_IWMMXT		(TARGET_IWMMXT && TARGET_32BIT)
 #define TARGET_IWMMXT_ABI (TARGET_32BIT && arm_abi == ARM_ABI_IWMMXT)
@@ -216,6 +216,8 @@ extern void (*arm_lang_output_object_attributes_hook)(void);
 #define TARGET_THUMB2			(TARGET_THUMB && arm_arch_thumb2)
 /* Thumb-1 only.  */
 #define TARGET_THUMB1_ONLY		(TARGET_THUMB1 && !arm_arch_notm)
+/* FPA emulator without LFM.  */
+#define TARGET_FPA_EMU2			(TARGET_FPA && arm_fpu_desc->rev == 2)
 
 /* The following two macros concern the ability to execute coprocessor
    instructions for VFPv3 or NEON.  TARGET_VFP3/TARGET_VFPD32 are currently
@@ -223,27 +225,21 @@ extern void (*arm_lang_output_object_attributes_hook)(void);
    to be more careful with TARGET_NEON as noted below.  */
 
 /* FPU is has the full VFPv3/NEON register file of 32 D registers.  */
-#define TARGET_VFPD32 (arm_fp_model == ARM_FP_MODEL_VFP \
-		       && (arm_fpu_arch == FPUTYPE_VFP3 \
-			   || arm_fpu_arch == FPUTYPE_NEON \
-			   || arm_fpu_arch == FPUTYPE_NEON_FP16))
+#define TARGET_VFPD32 (TARGET_VFP && arm_fpu_desc->regs == VFP_REG_D32)
 
 /* FPU supports VFPv3 instructions.  */
-#define TARGET_VFP3 (arm_fp_model == ARM_FP_MODEL_VFP \
-		     && (arm_fpu_arch == FPUTYPE_VFP3D16 \
-			 || TARGET_VFPD32))
+#define TARGET_VFP3 (TARGET_VFP && arm_fpu_desc->rev >= 3)
 
 /* FPU supports NEON/VFP half-precision floating-point.  */
-#define TARGET_NEON_FP16 (arm_fpu_arch == FPUTYPE_NEON_FP16)
+#define TARGET_NEON_FP16 \
+  (TARGET_VFP && arm_fpu_desc->neon && arm_fpu_desc->fp16)
 
 /* FPU supports Neon instructions.  The setting of this macro gets
    revealed via __ARM_NEON__ so we add extra guards upon TARGET_32BIT
    and TARGET_HARD_FLOAT to ensure that NEON instructions are
    available.  */
 #define TARGET_NEON (TARGET_32BIT && TARGET_HARD_FLOAT \
-		     && arm_fp_model == ARM_FP_MODEL_VFP \
-		     && (arm_fpu_arch == FPUTYPE_NEON \
-			 || arm_fpu_arch == FPUTYPE_NEON_FP16))
+		     && TARGET_VFP && arm_fpu_desc->neon)
 
 /* "DSP" multiply instructions, eg. SMULxy.  */
 #define TARGET_DSP_MULTIPLY \
@@ -300,42 +296,25 @@ enum arm_fp_model
   ARM_FP_MODEL_VFP
 };
 
-extern enum arm_fp_model arm_fp_model;
-
-/* Which floating point hardware is available.  Also update
-   fp_model_for_fpu in arm.c when adding entries to this list.  */
-enum fputype
+enum vfp_reg_type
 {
-  /* No FP hardware.  */
-  FPUTYPE_NONE,
-  /* Full FPA support.  */
-  FPUTYPE_FPA,
-  /* Emulated FPA hardware, Issue 2 emulator (no LFM/SFM).  */
-  FPUTYPE_FPA_EMU2,
-  /* Emulated FPA hardware, Issue 3 emulator.  */
-  FPUTYPE_FPA_EMU3,
-  /* Cirrus Maverick floating point co-processor.  */
-  FPUTYPE_MAVERICK,
-  /* VFP.  */
-  FPUTYPE_VFP,
-  /* VFPv3-D16.  */
-  FPUTYPE_VFP3D16,
-  /* VFPv3.  */
-  FPUTYPE_VFP3,
-  /* Neon.  */
-  FPUTYPE_NEON,
-  /* Neon with half-precision float extensions.  */
-  FPUTYPE_NEON_FP16
+  VFP_REG_D16,
+  VFP_REG_D32,
+  VFP_REG_SINGLE
 };
 
-/* Recast the floating point class to be the floating point attribute.  */
-#define arm_fpu_attr ((enum attr_fpu) arm_fpu_tune)
-
-/* What type of floating point to tune for */
-extern enum fputype arm_fpu_tune;
-
-/* What type of floating point instructions are available */
-extern enum fputype arm_fpu_arch;
+extern const struct arm_fpu_desc
+{
+  const char *name;
+  enum arm_fp_model model;
+  int rev;
+  enum vfp_reg_type regs;
+  int neon;
+  int fp16;
+} *arm_fpu_desc;
+
+/* Which floating point hardware to schedule for.  */
+extern int arm_fpu_attr;
 
 enum float_abi_type
 {

gcc/config/arm/arm.md

@@ -160,7 +160,7 @@
 ; Floating Point Unit.  If we only have floating point emulation, then there
 ; is no point in scheduling the floating point insns.  (Well, for best
 ; performance we should try and group them together).
-(define_attr "fpu" "none,fpa,fpe2,fpe3,maverick,vfp,vfpv3d16,vfpv3,neon,neon_fp16"
+(define_attr "fpu" "none,fpa,fpe2,fpe3,maverick,vfp"
   (const (symbol_ref "arm_fpu_attr")))
 
 ; LENGTH of an instruction (in bytes)

gcc/config/arm/bpabi.h

@@ -30,7 +30,7 @@
 
 /* Section 4.1 of the AAPCS requires the use of VFP format.  */
 #undef  FPUTYPE_DEFAULT
-#define FPUTYPE_DEFAULT FPUTYPE_VFP
+#define FPUTYPE_DEFAULT "vfp"
 
 /* TARGET_BIG_ENDIAN_DEFAULT is set in
    config.gcc for big endian configurations.  */

gcc/config/arm/fpa.md

@@ -599,10 +599,10 @@
     {
     default:
     case 0: return \"mvf%?e\\t%0, %1\";
-    case 1: if (arm_fpu_arch == FPUTYPE_FPA_EMU2)
+    case 1: if (TARGET_FPA_EMU2)
 	      return \"ldf%?e\\t%0, %1\";
 	    return \"lfm%?\\t%0, 1, %1\";
-    case 2: if (arm_fpu_arch == FPUTYPE_FPA_EMU2)
+    case 2: if (TARGET_FPA_EMU2)
 	      return \"stf%?e\\t%1, %0\";
 	    return \"sfm%?\\t%1, 1, %0\";
     }

gcc/config/arm/linux-elf.h

@@ -98,7 +98,7 @@
 
 /* NWFPE always understands FPA instructions.  */
 #undef  FPUTYPE_DEFAULT
-#define FPUTYPE_DEFAULT FPUTYPE_FPA_EMU3
+#define FPUTYPE_DEFAULT "fpe3"
 
 /* Call the function profiler with a given profile label.  */
 #undef  ARM_FUNCTION_PROFILER

gcc/config/arm/netbsd-elf.h

@@ -153,5 +153,5 @@ do									\
 while (0)
 
 #undef FPUTYPE_DEFAULT
-#define FPUTYPE_DEFAULT FPUTYPE_VFP
+#define FPUTYPE_DEFAULT "vfp"
 

gcc/config/arm/vxworks.h

@@ -97,7 +97,7 @@ along with GCC; see the file COPYING3.  If not see
 /* There is no default multilib.  */
 #undef MULTILIB_DEFAULTS
 
-#define FPUTYPE_DEFAULT FPUTYPE_VFP
+#define FPUTYPE_DEFAULT "vfp"
 
 #undef FUNCTION_PROFILER
 #define FUNCTION_PROFILER VXWORKS_FUNCTION_PROFILER