From 5c8844646d88eaf4ec6b9c682fc1a32757fd0c07 Mon Sep 17 00:00:00 2001
From: Matthew Green <mrg@redhat.com>
Date: Fri, 4 Jan 2002 00:00:54 +0000
Subject: * bits.c (LSMASKED64): New inline function. (LSEXTRACTED64):
 Likewise. * bits.h (_LSB_POS, _LSMASKn, LSMASK64): New macros from
 sim/common/sim-bits.h (LSMASKED64, LSEXTRACTED64): New functions definitions.
 * Makefile.in (sim-bits.o): Remove target.

* main.c (zalloc): Fix typo in error message.
---
 sim/ppc/bits.h | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'sim/ppc/bits.h')

diff --git a/sim/ppc/bits.h b/sim/ppc/bits.h
index 06898e0..35e4322 100644
--- 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 */
-- 
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