* configure.in: Remove target-libstdc++-v3 from noconfigdirs for

[deliverable/binutils-gdb.git] / sim / ppc / bits.h

diff --git a/sim/ppc/bits.h b/sim/ppc/bits.h
index 06898e07e9b65d6b3ee83bc2afa1cf5ae7ef5ffc..35e4322b81835925896c59459cd2aba268b9d699 100644 (file)
--- a/sim/ppc/bits.h
+++ b/sim/ppc/bits.h
@@ -45,10 +45,15 @@
    MASKED*(VALUE, FIRST, LAST): Masks out all but bits [FIRST
    .. LAST].
 
+   LSMASKED*(VALUE, FIRST, LAST): Like MASKED - LS bit is zero.
+
    EXTRACTED*(VALUE, FIRST, LAST): Masks out bits [FIRST .. LAST] but
    also right shifts the masked value so that bit LAST becomes the
    least significant (right most).
 
+   LSEXTRACTED*(VALUE, FIRST, LAST): Same as extracted - LS bit is
+   zero.
+
    SHUFFLED**(VALUE, OLD, NEW): Mask then move a single bit from OLD
    new NEW.
 
@@ -77,6 +82,13 @@
 #define _MAKE_SHIFT(WIDTH, pos) ((WIDTH) - 1 - (pos))
 
 
+#if (WITH_TARGET_WORD_MSB == 0)
+#define _LSB_POS(WIDTH, SHIFT) (WIDTH - 1 - SHIFT)
+#else
+#define _LSB_POS(WIDTH, SHIFT) (SHIFT)
+#endif
+
+
 /* MakeBit */
 #define _BITn(WIDTH, pos) (((natural##WIDTH)(1)) \
                           << _MAKE_SHIFT(WIDTH, pos))
@@ -104,6 +116,14 @@
 #define MASK32(START, STOP)   _MASKn(32, START, STOP)
 #define MASK64(START, STOP)   _MASKn(64, START, STOP)
 
+/* Multi-bit mask on least significant bits */
+
+#define _LSMASKn(WIDTH, FIRST, LAST) _MASKn (WIDTH, \
+                                            _LSB_POS (WIDTH, FIRST), \
+                                            _LSB_POS (WIDTH, LAST))
+
+#define LSMASK64(FIRST, LAST)  _LSMASKn (64, (FIRST), (LAST))
+
 #if (WITH_TARGET_WORD_BITSIZE == 64)
 #define MASK(START, STOP) \
 (((START) <= (STOP)) \
@@ -149,6 +169,12 @@ INLINE_BITS\
  unsigned start,
  unsigned stop);
 
+INLINE_BITS\
+(unsigned64) LSMASKED64
+(unsigned64 word,
+ int first,
+  int last);
+
 
 /* extract the required bits aligning them with the lsb */
 #define _EXTRACTEDn(WIDTH, WORD, START, STOP) \
@@ -165,6 +191,11 @@ INLINE_BITS\
  unsigned start,
  unsigned stop);
 
+INLINE_BITS\
+(unsigned64) LSEXTRACTED64
+(unsigned64 val,
+ int start,
+ int stop);
 
 /* move a single bit around */
 /* NB: the wierdness (N>O?N-O:0) is to stop a warning from GCC */