Canonicalize mips nmadd/nmsub patterns.

* config/mips/mips.md: Add canonical nmadd and nmsub patterns for both
normal and -ffast-math code.

From-SVN: r86148

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d18d7989475e92e7c16732daeac2be8f3e6dd14d..2ed0288fb3f6e86f1346f2f20478818d0eafa868 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -4,7 +4,10 @@
        of VOIDmode for comparison code mode.
        * config/mips/mips.md: For conditional move patterns, use mode of
        first compare operand for comparison mode, instead of VOIDmode.
-       
+
+       * config/mips/mips.md: Add canonical nmadd and nmsub patterns for both
+       normal and -ffast-math code.
+
 2004-08-17  Mark Mitchell  <mark@codesourcery.com>
 
        PR c++/15871

diff --git a/gcc/config/mips/mips.md b/gcc/config/mips/mips.md
index b9c6f9209975cf35640c5a043d7a6a7f323dcc0b..8a6440e41c3d81ddcbd090692f37e74d8f826820 100644 (file)
--- a/gcc/config/mips/mips.md
+++ b/gcc/config/mips/mips.md
@@ -1904,7 +1904,19 @@
        (neg:DF (plus:DF (mult:DF (match_operand:DF 1 "register_operand" "f")
                                  (match_operand:DF 2 "register_operand" "f"))
                         (match_operand:DF 3 "register_operand" "f"))))]
-  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT && TARGET_FUSED_MADD"
+  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT
+   && TARGET_FUSED_MADD && HONOR_SIGNED_ZEROS (DFmode)"
+  "nmadd.d\t%0,%3,%1,%2"
+  [(set_attr "type"    "fmadd")
+   (set_attr "mode"    "DF")])
+
+(define_insn ""
+  [(set (match_operand:DF 0 "register_operand" "=f")
+       (minus:DF (mult:DF (neg:DF (match_operand:DF 1 "register_operand" "f"))
+                                  (match_operand:DF 2 "register_operand" "f"))
+                 (match_operand:DF 3 "register_operand" "f")))]
+  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT
+   && TARGET_FUSED_MADD && !HONOR_SIGNED_ZEROS (DFmode)"
   "nmadd.d\t%0,%3,%1,%2"
   [(set_attr "type"    "fmadd")
    (set_attr "mode"    "DF")])
@@ -1914,27 +1926,63 @@
        (neg:SF (plus:SF (mult:SF (match_operand:SF 1 "register_operand" "f")
                                  (match_operand:SF 2 "register_operand" "f"))
                         (match_operand:SF 3 "register_operand" "f"))))]
-  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_FUSED_MADD"
+  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_FUSED_MADD
+   && HONOR_SIGNED_ZEROS (SFmode)"
   "nmadd.s\t%0,%3,%1,%2"
   [(set_attr "type"    "fmadd")
    (set_attr "mode"    "SF")])
 
+(define_insn ""
+  [(set (match_operand:SF 0 "register_operand" "=f")
+       (minus:SF (mult:SF (neg:SF (match_operand:SF 1 "register_operand" "f"))
+                          (match_operand:SF 2 "register_operand" "f"))
+                 (match_operand:SF 3 "register_operand" "f")))]
+  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_FUSED_MADD
+   && !HONOR_SIGNED_ZEROS (SFmode)"
+  "nmadd.s\t%0,%3,%1,%2"
+  [(set_attr "type"    "fmadd")
+   (set_attr "mode"    "SF")])
+
+(define_insn ""
+  [(set (match_operand:DF 0 "register_operand" "=f")
+       (neg:DF (minus:DF (mult:DF (match_operand:DF 2 "register_operand" "f")
+                                  (match_operand:DF 3 "register_operand" "f"))
+                         (match_operand:DF 1 "register_operand" "f"))))]
+  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT
+   && TARGET_FUSED_MADD && HONOR_SIGNED_ZEROS (DFmode)"
+  "nmsub.d\t%0,%1,%2,%3"
+  [(set_attr "type"    "fmadd")
+   (set_attr "mode"    "DF")])
+
 (define_insn ""
   [(set (match_operand:DF 0 "register_operand" "=f")
        (minus:DF (match_operand:DF 1 "register_operand" "f")
                  (mult:DF (match_operand:DF 2 "register_operand" "f")
                           (match_operand:DF 3 "register_operand" "f"))))]
-  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT && TARGET_FUSED_MADD"
+  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT
+   && TARGET_FUSED_MADD && !HONOR_SIGNED_ZEROS (DFmode)"
   "nmsub.d\t%0,%1,%2,%3"
   [(set_attr "type"    "fmadd")
    (set_attr "mode"    "DF")])
 
+(define_insn ""
+  [(set (match_operand:SF 0 "register_operand" "=f")
+       (neg:SF (minus:SF (mult:SF (match_operand:SF 2 "register_operand" "f")
+                                  (match_operand:SF 3 "register_operand" "f"))
+                         (match_operand:SF 1 "register_operand" "f"))))]
+  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_FUSED_MADD
+   && HONOR_SIGNED_ZEROS (SFmode)"
+  "nmsub.s\t%0,%1,%2,%3"
+  [(set_attr "type"    "fmadd")
+   (set_attr "mode"    "SF")])
+
 (define_insn ""
   [(set (match_operand:SF 0 "register_operand" "=f")
        (minus:SF (match_operand:SF 1 "register_operand" "f")
                  (mult:SF (match_operand:SF 2 "register_operand" "f")
                           (match_operand:SF 3 "register_operand" "f"))))]
-  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_FUSED_MADD"
+  "ISA_HAS_NMADD_NMSUB && TARGET_HARD_FLOAT && TARGET_FUSED_MADD
+   && !HONOR_SIGNED_ZEROS (SFmode)"
   "nmsub.s\t%0,%1,%2,%3"
   [(set_attr "type"    "fmadd")
    (set_attr "mode"    "SF")])