ia64.md (UNSPEC_SETF_EXP,UNSPEC_FR_SQRT_RECIP_APPROX): New constants.

	* ia64.md (UNSPEC_SETF_EXP,UNSPEC_FR_SQRT_RECIP_APPROX): New constants.
	(*sqrt_approx): New instruction pattern for approximate square roots.
	(*setf_exp_xf): New instruction pattern for exponentiation.
	(*maddxf4_alts_truncsf): New instruction pattern for truncation.
	(sqrtsf2_internal_thr): New define_and_split implementing
	throughput-optimized inline calculation of SFmode square root.
	(sqrtdf2_internal_thr): Likewise for DFmode.
	(sqrtxf2_internal_thr): Likewise for XFmode.
	(sqrtsf2, sqrtdf2, sqrtxf2): New expanders to choose between
	latency- and throughput-optimized square root algorithms.
	* ia64.h (MASK_INLINE_SQRT_LAT, MASK_INLINE_SQRT_THR,
	TARGET_INLINE_SQRT_LAT, TARGET_INLINE_SQRT_THR, TARGET_INLINE_SQRT):
	New macros.
	(TARGET_SWITCHES): Add -minline-sqrt-min-latency and
	-minline-sqrt-max-throughput.
	* ia64.c (ia64_override_options): If both -minline-sqrt-min-latency
	and -minline-sqrt-max-throughput are given, notify the user
	that both options cannot be used simultaneously.
	If -minline-sqrt-min-latency is given, notify the user that
	this mode is not yet implemented.
	(rtx_needs_barrier): Reformat initial comment to obey
	72-character width limit.  Support UNSPEC_SETF_EXP and
	UNSPEC_FR_SQRT_RECIP_APPROX.

From-SVN: r73027

gcc/ChangeLog

+2003-10-28  Zack Weinberg  <zack@codesourcery.com>
+
+	* ia64.md (UNSPEC_SETF_EXP,UNSPEC_FR_SQRT_RECIP_APPROX): New constants.
+	(*sqrt_approx): New instruction pattern for approximate square roots.
+	(*setf_exp_xf): New instruction pattern for exponentiation.
+	(*maddxf4_alts_truncsf): New instruction pattern for truncation.
+	(sqrtsf2_internal_thr): New define_and_split implementing
+	throughput-optimized inline calculation of SFmode square root.
+	(sqrtdf2_internal_thr): Likewise for DFmode.
+	(sqrtxf2_internal_thr): Likewise for XFmode.
+	(sqrtsf2, sqrtdf2, sqrtxf2): New expanders to choose between
+	latency- and throughput-optimized square root algorithms.
+	* ia64.h (MASK_INLINE_SQRT_LAT, MASK_INLINE_SQRT_THR,
+	TARGET_INLINE_SQRT_LAT, TARGET_INLINE_SQRT_THR, TARGET_INLINE_SQRT):
+	New macros.
+	(TARGET_SWITCHES): Add -minline-sqrt-min-latency and
+	-minline-sqrt-max-throughput.
+	* ia64.c (ia64_override_options): If both -minline-sqrt-min-latency
+	and -minline-sqrt-max-throughput are given, notify the user
+	that both options cannot be used simultaneously.
+	If -minline-sqrt-min-latency is given, notify the user that
+	this mode is not yet implemented.
+	(rtx_needs_barrier): Reformat initial comment to obey
+	72-character width limit.  Support UNSPEC_SETF_EXP and
+	UNSPEC_FR_SQRT_RECIP_APPROX.
+
 2003-10-29  Alan Modra  <amodra@bigpond.net.au>
 
 	* config/rs6000/rs6000.md (movdf_softfloat64): Allow dummy ctr,ctr

gcc/config/ia64/ia64.c

@@ -4487,6 +4487,18 @@ ia64_override_options (void)
       target_flags &= ~MASK_INLINE_INT_DIV_THR;
     }
 
+  if (TARGET_INLINE_SQRT_LAT && TARGET_INLINE_SQRT_THR)
+    {
+      warning ("cannot optimize square root for both latency and throughput");
+      target_flags &= ~MASK_INLINE_SQRT_THR;
+    }
+
+  if (TARGET_INLINE_SQRT_LAT)
+    {
+      warning ("not yet implemented: latency-optimized inline square root");
+      target_flags &= ~MASK_INLINE_SQRT_LAT;
+    }
+
   if (ia64_fixed_range_string)
     fix_range (ia64_fixed_range_string);
 
@@ -4896,9 +4908,9 @@ set_src_needs_barrier (rtx x, struct reg_flags flags, int pred, rtx cond)
   return need_barrier;
 }
 
-/* Handle an access to rtx X of type FLAGS using predicate register PRED.
-   Return 1 is this access creates a dependency with an earlier instruction
-   in the same group.  */
+/* Handle an access to rtx X of type FLAGS using predicate register
+   PRED.  Return 1 if this access creates a dependency with an earlier
+   instruction in the same group.  */
 
 static int
 rtx_needs_barrier (rtx x, struct reg_flags flags, int pred)
@@ -5124,7 +5136,9 @@ rtx_needs_barrier (rtx x, struct reg_flags flags, int pred)
 	case UNSPEC_FR_SPILL:
 	case UNSPEC_FR_RESTORE:
 	case UNSPEC_GETF_EXP:
+	case UNSPEC_SETF_EXP:
         case UNSPEC_ADDP4:
+	case UNSPEC_FR_SQRT_RECIP_APPROX:
 	  need_barrier = rtx_needs_barrier (XVECEXP (x, 0, 0), flags, pred);
 	  break;
 

gcc/config/ia64/ia64.h

@@ -87,6 +87,10 @@ extern int target_flags;
 
 #define MASK_INLINE_INT_DIV_THR   0x00001000 /* inline div, max throughput.  */
 
+#define MASK_INLINE_SQRT_LAT      0x00002000 /* inline sqrt, min latency.  */
+
+#define MASK_INLINE_SQRT_THR      0x00004000 /* inline sqrt, max throughput. */
+
 #define MASK_DWARF2_ASM 0x40000000	/* test dwarf2 line info via gas.  */
 
 #define MASK_EARLY_STOP_BITS 0x00002000 /* tune stop bits for the model.  */
@@ -127,6 +131,13 @@ extern int target_flags;
 #define TARGET_INLINE_INT_DIV \
   (target_flags & (MASK_INLINE_INT_DIV_LAT | MASK_INLINE_INT_DIV_THR))
 
+#define TARGET_INLINE_SQRT_LAT (target_flags & MASK_INLINE_SQRT_LAT)
+
+#define TARGET_INLINE_SQRT_THR (target_flags & MASK_INLINE_SQRT_THR)
+
+#define TARGET_INLINE_SQRT \
+  (target_flags & (MASK_INLINE_SQRT_LAT | MASK_INLINE_SQRT_THR))
+
 #define TARGET_DWARF2_ASM	(target_flags & MASK_DWARF2_ASM)
 
 extern int ia64_tls_size;
@@ -186,6 +197,10 @@ extern int ia64_tls_size;
       N_("Generate inline integer division, optimize for latency") },	\
   { "inline-int-divide-max-throughput", MASK_INLINE_INT_DIV_THR,	\
       N_("Generate inline integer division, optimize for throughput") },\
+  { "inline-sqrt-min-latency", MASK_INLINE_SQRT_LAT,			\
+      N_("Generate inline square root, optimize for latency") },	\
+  { "inline-sqrt-max-throughput", MASK_INLINE_SQRT_THR,			\
+      N_("Generate inline square root, optimize for throughput") },     \
   { "dwarf2-asm", 	MASK_DWARF2_ASM,				\
       N_("Enable Dwarf 2 line debug info via GNU as")},			\
   { "no-dwarf2-asm", 	-MASK_DWARF2_ASM,				\