From: Jim Wilson <wilson@cygnus.com>
Date: Mon, 1 Dec 1997 22:24:11 +0000 (+0000)
Subject: mips.md (fix_truncdfsi2, [...]): Change *.
X-Git-Tag: releases/egcs-1.0.0~19
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=86d7f0480943b33d7ca87c86b158f696913ba07d;p=thirdparty%2Fgcc.git

mips.md (fix_truncdfsi2, [...]): Change *.

        * mips.md (fix_truncdfsi2, fix_truncsfsi2, fix_truncdfdi2,
        fix_truncsfdi2): Change *.

From-SVN: r16875
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f43343cd1492..1ccb9f80efd5 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Tue Nov 25 14:08:12 1997  Jim Wilson  <wilson@cygnus.com>
+
+	* mips.md (fix_truncdfsi2, fix_truncsfsi2, fix_truncdfdi2,
+	fix_truncsfdi2): Change *.
+
 Sun Nov 30 19:59:20 1997  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* stmt.c (expand_decl_cleanup): Update thisblock after eh_region_start.
diff --git a/gcc/config/mips/mips.md b/gcc/config/mips/mips.md
index 8bc70b770d8e..3d2b255c74b3 100644
--- a/gcc/config/mips/mips.md
+++ b/gcc/config/mips/mips.md
@@ -2731,11 +2731,17 @@ move\\t%0,%z4\\n\\
 ;; operand zero, because then the address in the move instruction will be
 ;; clobbered.  We mark the scratch register as early clobbered to prevent this.
 
+;; We need the ?X in alternative 1 so that it will be choosen only if the
+;; destination is a floating point register.  Otherwise, alternative 1 can
+;; have lower cost than alternative 0 (because there is one less loser), and
+;; can be choosen when it won't work (because integral reloads into FP
+;; registers are not supported).
+
 (define_insn "fix_truncdfsi2"
   [(set (match_operand:SI 0 "general_operand" "=d,*f,R,o")
 	(fix:SI (match_operand:DF 1 "register_operand" "f,*f,f,f")))
    (clobber (match_scratch:SI 2 "=d,*d,&d,&d"))
-   (clobber (match_scratch:DF 3 "=f,*X,f,f"))]
+   (clobber (match_scratch:DF 3 "=f,?*X,f,f"))]
   "TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT"
   "*
 {
@@ -2760,7 +2766,7 @@ move\\t%0,%z4\\n\\
   [(set (match_operand:SI 0 "general_operand" "=d,*f,R,o")
 	(fix:SI (match_operand:SF 1 "register_operand" "f,*f,f,f")))
    (clobber (match_scratch:SI 2 "=d,*d,&d,&d"))
-   (clobber (match_scratch:SF 3 "=f,*X,f,f"))]
+   (clobber (match_scratch:SF 3 "=f,?*X,f,f"))]
   "TARGET_HARD_FLOAT"
   "*
 {
@@ -2793,7 +2799,7 @@ move\\t%0,%z4\\n\\
 (define_insn "fix_truncdfdi2"
   [(set (match_operand:DI 0 "general_operand" "=d,*f,R,o")
 	(fix:DI (match_operand:DF 1 "register_operand" "f,*f,f,f")))
-   (clobber (match_scratch:DF 2 "=f,*X,f,f"))]
+   (clobber (match_scratch:DF 2 "=f,?*X,f,f"))]
   "TARGET_HARD_FLOAT && TARGET_64BIT && TARGET_DOUBLE_FLOAT"
   "*
 {
@@ -2820,7 +2826,7 @@ move\\t%0,%z4\\n\\
 (define_insn "fix_truncsfdi2"
   [(set (match_operand:DI 0 "general_operand" "=d,*f,R,o")
 	(fix:DI (match_operand:SF 1 "register_operand" "f,*f,f,f")))
-   (clobber (match_scratch:DF 2 "=f,*X,f,f"))]
+   (clobber (match_scratch:DF 2 "=f,?*X,f,f"))]
   "TARGET_HARD_FLOAT && TARGET_64BIT && TARGET_DOUBLE_FLOAT"
   "*
 {