[patch-2, rs6000] guard fctid on PPC64 and powerpc 476 [PR112707]

[HAO CHEN GUI]

Hi,
  The "fctid" is supported on 64-bit Power processors and powerpc 476. It
need a guard to check it. The patch fixes the issue.

  Bootstrapped and tested on x86 and powerpc64-linux BE and LE with
no regressions. Is this OK for trunk?

Thanks
Gui Haochen

ChangeLog
rs6000: guard fctid on PPC64 and powerpc 476

fctid is supported on 64-bit Power processors and powerpc 476. It should
be guarded by this condition. The patch fixes the issue.

gcc/
        PR target/112707
        * config/rs6000/rs6000.h (TARGET_FCTID): Define.
        * config/rs6000/rs6000.md (lrint<mode>di2): Add guard TARGET_FCTID.

gcc/testsuite/
        PR target/112707
        * gcc.target/powerpc/pr112707.h: New.
        * gcc.target/powerpc/pr112707-2.c: New.
        * gcc.target/powerpc/pr112707-3.c: New.


patch.diff
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h
index 22595f6..497ae3d 100644
--- a/gcc/config/rs6000/rs6000.h
+++ b/gcc/config/rs6000/rs6000.h
@@ -467,6 +467,8 @@ extern int rs6000_vector_align[];
 #define TARGET_FCFIDUS TARGET_POPCNTD
 #define TARGET_FCTIDUZ TARGET_POPCNTD
 #define TARGET_FCTIWUZ TARGET_POPCNTD
+/* Enable fctid on ppc64 and powerpc476.  */
+#define TARGET_FCTID   (TARGET_POWERPC64 | TARGET_FPRND)
 #define TARGET_CTZ     TARGET_MODULO
 #define TARGET_EXTSWSLI        (TARGET_MODULO && TARGET_POWERPC64)
 #define TARGET_MADDLD  TARGET_MODULO
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index d4337ce..4a5e63c 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -6718,7 +6718,7 @@ (define_insn "lrint<mode>di2"
   [(set (match_operand:DI 0 "gpc_reg_operand" "=d")
        (unspec:DI [(match_operand:SFDF 1 "gpc_reg_operand" "<rreg2>")]
                   UNSPEC_FCTID))]
-  "TARGET_HARD_FLOAT"
+  "TARGET_HARD_FLOAT && TARGET_FCTID"
   "fctid %0,%1"
   [(set_attr "type" "fp")])

diff --git a/gcc/testsuite/gcc.target/powerpc/pr112707-2.c 
b/gcc/testsuite/gcc.target/powerpc/pr112707-2.c
new file mode 100644
index 0000000..ae91913
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr112707-2.c
@@ -0,0 +1,6 @@
+/* { dg-do compile { target { powerpc*-*-* && be } } } */
+/* { dg-options "-O2 -mdejagnu-cpu=7450 -m32 -fno-math-errno" } */
+/* { dg-require-effective-target ilp32 } */
+/* { dg-final { scan-assembler-not {\mfctid\M} } }  */
+
+#include "pr112707.h"
diff --git a/gcc/testsuite/gcc.target/powerpc/pr112707-3.c 
b/gcc/testsuite/gcc.target/powerpc/pr112707-3.c
new file mode 100644
index 0000000..e47ce20
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr112707-3.c
@@ -0,0 +1,9 @@
+/* { dg-do compile { target { powerpc*-*-* && be } } } */
+/* { dg-options "-O2 -m32 -fno-math-errno -mdejagnu-cpu=476fp" } */
+/* { dg-require-effective-target ilp32 } */
+
+/* powerpc 476fp has hard float enabled which is required by fctid */
+
+#include "pr112707.h"
+
+/* { dg-final { scan-assembler-times {\mfctid\M} 2 } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/pr112707.h 
b/gcc/testsuite/gcc.target/powerpc/pr112707.h
new file mode 100644
index 0000000..e427dc6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr112707.h
@@ -0,0 +1,10 @@
+long long test1 (double a)
+{
+  return __builtin_llrint (a);
+}
+
+long long test2 (float a)
+{
+  return __builtin_llrint (a);
+}
+