* config/i386/i386.c (ix86_builtin_reciprocal): Remove check

        for TARGET_RECIP.
        (ix86_emit_swsqrtsf): Do not filter out infinity for rsqrt expansion.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@131342 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 633c096..85cdaca 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2008-01-05  Uros Bizjak  <ubizjak@gmail.com>
+
+       * config/i386/i386.c (ix86_builtin_reciprocal): Remove check
+       for TARGET_RECIP.
+       (ix86_emit_swsqrtsf): Do not filter out infinity for rsqrt expansion.
+
 2008-01-05  Richard Sandiford  <rsandifo@nildram.co.uk>
 
        * c-omp.c (check_omp_for_incr_expr): Handle CONVERT_EXPR.

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index f29df8d..2ca2872 100644 (file)
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -21466,7 +21466,7 @@ static tree
 ix86_builtin_reciprocal (unsigned int fn, bool md_fn,
                         bool sqrt ATTRIBUTE_UNUSED)
 {
-  if (! (TARGET_SSE_MATH && TARGET_RECIP && !optimize_size
+  if (! (TARGET_SSE_MATH && !optimize_size
         && flag_finite_math_only && !flag_trapping_math
         && flag_unsafe_math_optimizations))
     return NULL_TREE;
@@ -24239,16 +24239,18 @@ void ix86_emit_swsqrtsf (rtx res, rtx a, enum machine_mode mode,
      1.0 / sqrt(a) = 0.5 * rsqrtss(a) * (3.0 - a * rsqrtss(a) * rsqrtss(a)) */
 
   /* Compare a to zero.  */
-  emit_insn (gen_rtx_SET (VOIDmode, mask,
-                         gen_rtx_NE (mode, zero, a)));
+  if (!recip)
+    emit_insn (gen_rtx_SET (VOIDmode, mask,
+                           gen_rtx_NE (mode, zero, a)));
 
   /* x0 = 1./sqrt(a) estimate */
   emit_insn (gen_rtx_SET (VOIDmode, x0,
                          gen_rtx_UNSPEC (mode, gen_rtvec (1, a),
                                          UNSPEC_RSQRT)));
   /* Filter out infinity.  */
-  emit_insn (gen_rtx_SET (VOIDmode, x0,
-                         gen_rtx_AND (mode, x0, mask)));
+  if (!recip)
+    emit_insn (gen_rtx_SET (VOIDmode, x0,
+                           gen_rtx_AND (mode, x0, mask)));
   /* e0 = x0 * a */
   emit_insn (gen_rtx_SET (VOIDmode, e0,
                          gen_rtx_MULT (mode, x0, a)));