cris.h (TARGET_HAS_LZ, [...]): Defined to describe availability and behavior of CLZ.

	* config/cris/cris.h (TARGET_HAS_LZ, CLZ_DEFINED_VALUE_AT_ZERO):
	Defined to describe availability and behavior of CLZ.
	* config/cris/cris.md (clzsi2): Implement using lz instruction.
	* config/cris/cris.opt: Tweak comment for "-metrax4".
	* config/cris/arit.c (LZ): When defined, define as __builtin_clz.
	* longlong.h [__CRIS__ && __CRIS_arch_version >= 3]
	(count_leading_zeros): Define.

Co-Authored-By: Hans-Peter Nilsson <hp@axis.com>
From-SVN: r128034

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a5d6a08f661ba5e50eec62ca6c2528e9b25272f4..df1be60ae9dacfb8ba2ab93ee1bbb1acb2c7c573 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,14 @@
+2007-09-03  Jesper Nilsson  <jesper.nilsson@axis.com>
+           Hans-Peter Nilsson  <hp@axis.com>
+
+       * config/cris/cris.h (TARGET_HAS_LZ, CLZ_DEFINED_VALUE_AT_ZERO):
+       Defined to describe availability and behavior of CLZ.
+       * config/cris/cris.md (clzsi2): Implement using lz instruction.
+       * config/cris/cris.opt: Tweak comment for "-metrax4".
+       * config/cris/arit.c (LZ): When defined, define as __builtin_clz.
+       * longlong.h [__CRIS__ && __CRIS_arch_version >= 3]
+       (count_leading_zeros): Define.
+
 2007-09-01  Laurynas Biveinis  <laurynas.biveinis@gmail.com>
 
        * ggc-page.c (ggc_pch_read): Call validate_free_objects.

diff --git a/gcc/config/cris/arit.c b/gcc/config/cris/arit.c
index e094ea76ec0f81ba09d450c2c5a324ec8542bafa..6e73a7480164a4dac292361eca976748a997db8b 100644 (file)
--- a/gcc/config/cris/arit.c
+++ b/gcc/config/cris/arit.c
@@ -48,8 +48,7 @@ Boston, MA 02110-1301, USA.
 #include "config.h"
 
 #if defined (__CRIS_arch_version) && __CRIS_arch_version >= 3
-#define LZ(v) __extension__ \
- ({ int tmp_; __asm__ ("lz %1,%0" : "=r" (tmp_) : "r" (v)); tmp_; })
+#define LZ(v) __builtin_clz (v)
 #endif
 
 

diff --git a/gcc/config/cris/cris.h b/gcc/config/cris/cris.h
index 2cb844855cc9420d6fd65151203c5ea81e5e5f1d..b7b4bba43e7207cf1f76d375a74d9ac38b865acf 100644 (file)
--- a/gcc/config/cris/cris.h
+++ b/gcc/config/cris/cris.h
@@ -278,6 +278,7 @@ extern int target_flags;
 #define CRIS_DEFAULT_CPU_VERSION CRIS_CPU_BASE
 
 #define TARGET_HAS_MUL_INSNS (cris_cpu_version >= CRIS_CPU_NG)
+#define TARGET_HAS_LZ (cris_cpu_version >= CRIS_CPU_ETRAX4)
 
 #define CRIS_SUBTARGET_HANDLE_OPTION(x, y, z)
 
@@ -1407,6 +1408,8 @@ enum cris_pic_symbol_type
 
 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 
+#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)
+
 #define Pmode SImode
 
 #define FUNCTION_MODE QImode

diff --git a/gcc/config/cris/cris.md b/gcc/config/cris/cris.md
index f9b0e927af3b377408194aae5300b0e70e1ae88f..974e1d685b3da0ab6e1086c435d91a562f249e53 100644 (file)
--- a/gcc/config/cris/cris.md
+++ b/gcc/config/cris/cris.md
@@ -2663,7 +2663,14 @@
        (subreg:BW (match_dup 3) 0))]
   ""
   "operands[2] = gen_reg_rtx (SImode); operands[3] = gen_reg_rtx (SImode);")
-\f
+
+(define_insn "clzsi2"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+       (clz:SI (match_operand:SI 1 "register_operand" "r")))]
+  "TARGET_HAS_LZ"
+  "lz %1,%0"
+  [(set_attr "slottable" "yes")])
+
 ;; Bound-insn.  Defined to be the same as an unsigned minimum, which is an
 ;; operation supported by gcc.  Used in casesi, but used now and then in
 ;; normal code too.

diff --git a/gcc/config/cris/cris.opt b/gcc/config/cris/cris.opt
index 9af5f84a42ac448ed705f554798cdcee2aaf12f0..9caa48924b9df53cadf2002c6618d3facfb64294 100644 (file)
--- a/gcc/config/cris/cris.opt
+++ b/gcc/config/cris/cris.opt
@@ -45,7 +45,7 @@ Target Report Mask(MUL_BUG)
 Work around bug in multiplication instruction
 
 ; TARGET_ETRAX4_ADD: Instruction-set additions from Etrax 4 and up.
-; (Just "lz", which we don't really generate from GCC -- yet).
+; (Just "lz".)
 metrax4
 Target Report Mask(ETRAX4_ADD)
 Compile for ETRAX 4 (CRIS v3)

diff --git a/gcc/longlong.h b/gcc/longlong.h
index 0d8e01d3bf2ba6d3a7bd1fff9e4260e07250ed86..edb9bfd5f3550b4ca56ef0522df350c1d9511cd0 100644 (file)
--- a/gcc/longlong.h
+++ b/gcc/longlong.h
@@ -226,6 +226,10 @@ UDItype __umulsidi3 (USItype, USItype);
 #define UDIV_TIME 100
 #endif /* __arm__ */
 
+#if defined (__CRIS__) && __CRIS_arch_version >= 3
+#define count_leading_zeros(COUNT, X) ((COUNT) = __builtin_clz (X))
+#endif /* __CRIS__ */
+
 #if defined (__hppa) && W_TYPE_SIZE == 32
 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
   __asm__ ("add %4,%5,%1\n\taddc %2,%3,%0"                             \