real.c (spu_single_format): New variable.

ChangeLog:

	* real.c (spu_single_format): New variable.
	* real.h (spu_single_format): Declare.

	* config/spu/spu.c (spu_override_options): Install SFmode format.
	(spu_split_immediate): Use integer mode to operate on pieces of
	floating-point values in all cases.

	* config/spu/spu.md (UNSPEC_FLOAT_EXTEND, UNSPEC_FLOAT_TRUNCATE): New.
	("extendsfdf2"): Use UNSPEC_FLOAT_EXTEND instead of FLOAT_EXTEND.
	("truncdfsf2"): Use UNSPEC_FLOAT_TRUNCATE instead of FLOAT_TRUNCATE.

testsuite/ChangeLog:

	* gcc.c-torture/execute/ieee/inf-2.c (testf): Skip on the SPU.

Co-Authored-By: Trevor Smigiel <Trevor_Smigiel@playstation.sony.com>

From-SVN: r139013

7 files changed, 75 insertions, 8 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 42afad2..cbd499e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,4 +1,18 @@
 2008-08-12  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
+	    Trevor Smigiel  <trevor_smigiel@playstation.sony.com>
+
+	* real.c (spu_single_format): New variable.
+	* real.h (spu_single_format): Declare.
+
+	* config/spu/spu.c (spu_override_options): Install SFmode format.
+	(spu_split_immediate): Use integer mode to operate on pieces of
+	floating-point values in all cases.
+
+	* config/spu/spu.md (UNSPEC_FLOAT_EXTEND, UNSPEC_FLOAT_TRUNCATE): New.
+	("extendsfdf2"): Use UNSPEC_FLOAT_EXTEND instead of FLOAT_EXTEND.
+	("truncdfsf2"): Use UNSPEC_FLOAT_TRUNCATE instead of FLOAT_TRUNCATE.
+
+2008-08-12  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
 
 	* config/spu/spu.c (spu_safe_dma): Respect TARGET_SAFE_DMA.
 
diff --git a/gcc/config/spu/spu.c b/gcc/config/spu/spu.c
index 230f4c0..1021a91 100644
--- a/gcc/config/spu/spu.c
+++ b/gcc/config/spu/spu.c
@@ -352,6 +352,8 @@ spu_override_options (void)
       else
         error ("Unknown architecture '%s'", &spu_tune_string[0]);
     }
+
+  REAL_MODE_FORMAT (SFmode) = &spu_single_format;
 }
 
 /* Handle an attribute requiring a FUNCTION_DECL; arguments as in
@@ -1519,10 +1521,18 @@ spu_split_immediate (rtx * ops)
       {
 	unsigned char arrhi[16];
 	unsigned char arrlo[16];
-	rtx to, hi, lo;
+	rtx to, temp, hi, lo;
 	int i;
+	enum machine_mode imode = mode;
+	/* We need to do reals as ints because the constant used in the
+	   IOR might not be a legitimate real constant. */
+	imode = int_mode_for_mode (mode);
 	constant_to_array (mode, ops[1], arrhi);
-	to = !can_create_pseudo_p () ? ops[0] : gen_reg_rtx (mode);
+	if (imode != mode)
+	  to = simplify_gen_subreg (imode, ops[0], mode, 0);
+	else
+	  to = ops[0];
+	temp = !can_create_pseudo_p () ? to : gen_reg_rtx (imode);
 	for (i = 0; i < 16; i += 4)
 	  {
 	    arrlo[i + 2] = arrhi[i + 2];
@@ -1530,11 +1540,11 @@ spu_split_immediate (rtx * ops)
 	    arrlo[i + 0] = arrlo[i + 1] = 0;
 	    arrhi[i + 2] = arrhi[i + 3] = 0;
 	  }
-	hi = array_to_constant (mode, arrhi);
-	lo = array_to_constant (mode, arrlo);
-	emit_move_insn (to, hi);
+	hi = array_to_constant (imode, arrhi);
+	lo = array_to_constant (imode, arrlo);
+	emit_move_insn (temp, hi);
 	emit_insn (gen_rtx_SET
-		   (VOIDmode, ops[0], gen_rtx_IOR (mode, to, lo)));
+		   (VOIDmode, to, gen_rtx_IOR (imode, temp, lo)));
 	return 1;
       }
     case IC_FSMBI2:
diff --git a/gcc/config/spu/spu.md b/gcc/config/spu/spu.md
index c267efd..e50a65a 100644
--- a/gcc/config/spu/spu.md
+++ b/gcc/config/spu/spu.md
@@ -153,6 +153,8 @@
  (UNSPEC_SPU_REALIGN_LOAD 49)
  (UNSPEC_SPU_MASK_FOR_LOAD 50)
  (UNSPEC_DFTSV		 51)
+ (UNSPEC_FLOAT_EXTEND	 52)
+ (UNSPEC_FLOAT_TRUNCATE	 53)
 ])
 
 (include "predicates.md")
@@ -648,14 +650,16 @@
 
 (define_insn "extendsfdf2"
   [(set (match_operand:DF 0 "spu_reg_operand" "=r")
-	(float_extend:DF (match_operand:SF 1 "spu_reg_operand" "r")))]
+	(unspec:DF [(match_operand:SF 1 "spu_reg_operand" "r")]
+                   UNSPEC_FLOAT_EXTEND))]
   ""
   "fesd\t%0,%1"
   [(set_attr "type" "fpd")])
 
 (define_insn "truncdfsf2"
   [(set (match_operand:SF 0 "spu_reg_operand" "=r")
-	(float_truncate:SF (match_operand:DF 1 "spu_reg_operand" "r")))]
+	(unspec:SF [(match_operand:DF 1 "spu_reg_operand" "r")]
+                   UNSPEC_FLOAT_TRUNCATE))]
   ""
   "frds\t%0,%1"
   [(set_attr "type" "fpd")])
diff --git a/gcc/real.c b/gcc/real.c
index b071756..49eb97d 100644
--- a/gcc/real.c
+++ b/gcc/real.c
@@ -2862,6 +2862,36 @@ const struct real_format motorola_single_format =
     true,
     true
   };
+
+/*  SPU Single Precision (Extended-Range Mode) format is the same as IEEE
+    single precision with the following differences:
+      - Infinities are not supported.  Instead MAX_FLOAT or MIN_FLOAT
+	are generated.
+      - NaNs are not supported.
+      - The range of non-zero numbers in binary is
+	(001)[1.]000...000 to (255)[1.]111...111.
+      - Denormals can be represented, but are treated as +0.0 when
+	used as an operand and are never generated as a result.
+      - -0.0 can be represented, but a zero result is always +0.0.
+      - the only supported rounding mode is trunction (towards zero).  */
+const struct real_format spu_single_format =
+  {
+    encode_ieee_single,
+    decode_ieee_single,
+    2,
+    24,
+    24,
+    -125,
+    129,
+    31,
+    31,
+    false,
+    false,
+    true,
+    true,
+    false,
+    false
+  };
 
 /* IEEE double-precision format.  */
 
diff --git a/gcc/real.h b/gcc/real.h
index 6332299..39522b6 100644
--- a/gcc/real.h
+++ b/gcc/real.h
@@ -259,6 +259,7 @@ extern unsigned int real_hash (const REAL_VALUE_TYPE *);
 extern const struct real_format ieee_single_format;
 extern const struct real_format mips_single_format;
 extern const struct real_format motorola_single_format;
+extern const struct real_format spu_single_format;
 extern const struct real_format ieee_double_format;
 extern const struct real_format mips_double_format;
 extern const struct real_format motorola_double_format;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d6f2811..8653a14 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2008-08-12  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
+
+	* gcc.c-torture/execute/ieee/inf-2.c (testf): Skip on the SPU.
+
 2008-08-12  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/36688
diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/inf-2.c b/gcc/testsuite/gcc.c-torture/execute/ieee/inf-2.c
index 40270c0..1823b35 100644
--- a/gcc/testsuite/gcc.c-torture/execute/ieee/inf-2.c
+++ b/gcc/testsuite/gcc.c-torture/execute/ieee/inf-2.c
@@ -25,6 +25,9 @@ void test(double f, double i)
 
 void testf(float f, float i)
 {
+#ifndef __SPU__
+  /* The SPU single-precision floating point format does not support Inf.  */
+
   if (f == __builtin_inff())
     abort ();
   if (f == -__builtin_inff())
@@ -44,6 +47,7 @@ void testf(float f, float i)
     abort ();
   if (f < -__builtin_inff())
     abort ();
+#endif
 }
 
 void testl(long double f, long double i)