stormy16-lib2.c: Arrange for separate compilation of each function.

        * config/stormy16/stormy16-lib2.c: Arrange for separate
        compilation of each function.
        (__ffshi2): New function.
        (__stormy16_count_leading_zeros): New function.
        * config/stormy16/t-stormy16 (LIB2FUNCS_EXTRA): Use stub files to
        compile each function into its own object file.
        (stormy16-lib2-ashlsi3.c): New stub file.
        (stormy16-lib2-ashrsi3.c): New stub file.
        (stormy16-lib2-clzhi2.c): New stub file.
        (stormy16-lib2-count-leading-zeros.c): New stub file.
        (stormy16-lib2-ctzhi2.c): New stub file.
        (stormy16-lib2-divsi3.c): New stub file.
        (stormy16-lib2-ffshi2.c): New stub file.
        (stormy16-lib2-lshrsi3.c): New stub file.
        (stormy16-lib2-modsi3.c): New stub file.
        (stormy16-lib2-parityhi2.c): New stub file.
        (stormy16-lib2-popcounthi2.c): New stub file.
        (stormy16-lib2-udivmodsi4.c): New stub file.
        (stormy16-lib2-udivsi3.c): New stub file.
        (stormy16-lib2-umodsi3.c): New stub file.
        * longlong.h (count_leading_zeros): Define macro for stormy16
        target.
        (COUNT_LEADING_ZEROS_0): Likewise.

From-SVN: r154713

16 files changed, 115 insertions, 15 deletions

diff --git a/gcc/config/stormy16/stormy16-lib2-ashlsi3.c b/gcc/config/stormy16/stormy16-lib2-ashlsi3.c
new file mode 100644
index 0000000..d6cabc6
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-ashlsi3.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_ASHLSI3
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-ashrsi3.c b/gcc/config/stormy16/stormy16-lib2-ashrsi3.c
new file mode 100644
index 0000000..151e3d0
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-ashrsi3.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_ASHRSI3
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-clzhi2.c b/gcc/config/stormy16/stormy16-lib2-clzhi2.c
new file mode 100644
index 0000000..066fdf1
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-clzhi2.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_CLZHI2
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-count-leading-zeros.c b/gcc/config/stormy16/stormy16-lib2-count-leading-zeros.c
new file mode 100644
index 0000000..1b98d30
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-count-leading-zeros.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_COUNT_LEADING_ZEROS
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-ctzhi2.c b/gcc/config/stormy16/stormy16-lib2-ctzhi2.c
new file mode 100644
index 0000000..c1497db
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-ctzhi2.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_CTZHI2
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-divsi3.c b/gcc/config/stormy16/stormy16-lib2-divsi3.c
new file mode 100644
index 0000000..33c370d
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-divsi3.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_DIVSI3
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-ffshi2.c b/gcc/config/stormy16/stormy16-lib2-ffshi2.c
new file mode 100644
index 0000000..4b629dd
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-ffshi2.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_FFSHI2
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-lshrsi3.c b/gcc/config/stormy16/stormy16-lib2-lshrsi3.c
new file mode 100644
index 0000000..cd769ee
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-lshrsi3.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_LSHRSI3
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-modsi3.c b/gcc/config/stormy16/stormy16-lib2-modsi3.c
new file mode 100644
index 0000000..587d007
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-modsi3.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_MODSI3
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-parityhi2.c b/gcc/config/stormy16/stormy16-lib2-parityhi2.c
new file mode 100644
index 0000000..1d12817
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-parityhi2.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_PARITYHI2
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-popcounthi2.c b/gcc/config/stormy16/stormy16-lib2-popcounthi2.c
new file mode 100644
index 0000000..f07d668
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-popcounthi2.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_POPCOUNTHI2
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-udivmodsi4.c b/gcc/config/stormy16/stormy16-lib2-udivmodsi4.c
new file mode 100644
index 0000000..d555e64
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-udivmodsi4.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_UDIVMODSI4
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-udivsi3.c b/gcc/config/stormy16/stormy16-lib2-udivsi3.c
new file mode 100644
index 0000000..fdcd64a
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-udivsi3.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_UDIVSI3
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2-umodsi3.c b/gcc/config/stormy16/stormy16-lib2-umodsi3.c
new file mode 100644
index 0000000..87921f2
--- /dev/null
+++ b/gcc/config/stormy16/stormy16-lib2-umodsi3.c
@@ -0,0 +1,2 @@
+#define XSTORMY16_UMODSI3
+#include "stormy16-lib2.c"
diff --git a/gcc/config/stormy16/stormy16-lib2.c b/gcc/config/stormy16/stormy16-lib2.c
index d5ab1c3..91c3c3d 100644
--- a/gcc/config/stormy16/stormy16-lib2.c
+++ b/gcc/config/stormy16/stormy16-lib2.c
@@ -75,7 +75,7 @@ extern int __clzhi2 (UHWtype);
 extern int __ctzhi2 (UHWtype);
 
 
-
+#ifdef XSTORMY16_UDIVMODSI4
 USItype
 udivmodsi4 (USItype num, USItype den, word_type modwanted)
 {
@@ -102,7 +102,9 @@ udivmodsi4 (USItype num, USItype den, word_type modwanted)
     return num;
   return res;
 }
+#endif
 
+#ifdef XSTORMY16_DIVSI3
 SItype
 __divsi3 (SItype a, SItype b)
 {
@@ -128,7 +130,9 @@ __divsi3 (SItype a, SItype b)
 
   return res;
 }
+#endif
 
+#ifdef XSTORMY16_MODSI3
 SItype
 __modsi3 (SItype a, SItype b)
 {
@@ -151,19 +155,25 @@ __modsi3 (SItype a, SItype b)
 
   return res;
 }
+#endif
 
+#ifdef XSTORMY16_UDIVSI3
 SItype
 __udivsi3 (SItype a, SItype b)
 {
   return udivmodsi4 (a, b, 0);
 }
+#endif
 
+#ifdef XSTORMY16_UMODSI3
 SItype
 __umodsi3 (SItype a, SItype b)
 {
   return udivmodsi4 (a, b, 1);
 }
+#endif
 
+#ifdef XSTORMY16_ASHLSI3
 SItype
 __ashlsi3 (SItype a, SItype b)
 {
@@ -177,7 +187,9 @@ __ashlsi3 (SItype a, SItype b)
     a <<= 1;
   return a;
 }
+#endif
 
+#ifdef XSTORMY16_ASHRSI3
 SItype
 __ashrsi3 (SItype a, SItype b)
 {
@@ -191,7 +203,9 @@ __ashrsi3 (SItype a, SItype b)
     a >>= 1;
   return a;
 }
+#endif
 
+#ifdef XSTORMY16_LSHRSI3
 USItype
 __lshrsi3 (USItype a, USItype b)
 {
@@ -205,9 +219,11 @@ __lshrsi3 (USItype a, USItype b)
     a >>= 1;
   return a;
 }
+#endif
 
+#ifdef XSTORMY16_POPCOUNTHI2
 /* Returns the number of set bits in X.
-   FIXME:  The return type really should be unsigned,
+   FIXME:  The return type really should be "unsigned int"
    but this is not how the builtin is prototyped.  */
 int
 __popcounthi2 (UHWtype x)
@@ -219,9 +235,11 @@ __popcounthi2 (UHWtype x)
 
   return ret;
 }
+#endif
 
+#ifdef XSTORMY16_PARITYHI2
 /* Returns the number of set bits in X, modulo 2.
-   FIXME:  The return type really should be unsigned,
+   FIXME:  The return type really should be "unsigned int"
    but this is not how the builtin is prototyped.  */
 
 int
@@ -232,32 +250,72 @@ __parityhi2 (UHWtype x)
   x &= 0xf;
   return (0x6996 >> x) & 1;
 }
+#endif
 
+#ifdef XSTORMY16_CLZHI2
 /* Returns the number of leading zero bits in X.
-   FIXME:  The return type really should be unsigned,
+   FIXME:  The return type really should be "unsigned int"
    but this is not how the builtin is prototyped.  */
 
 int
 __clzhi2 (UHWtype x)
 {
-  if (x > 0xff)
-    return 8 - __clz_tab[x >> 8];
-  return 16 - __clz_tab[x];
+  return __stormy16_count_leading_zeros (x);
 }
+#endif
 
+#ifdef XSTORMY16_CTZHI2
 /* Returns the number of trailing zero bits in X.
-   FIXME:  The return type really should be unsigned,
-   but this is not how the builtin is prototyped.  */
+   FIXME:  The return type really should be "signed int" since
+   ctz(0) returns -1, but this is not how the builtin is prototyped.  */
 
 int
 __ctzhi2 (UHWtype x)
 {
   /* This is cunning.  It converts X into a number with only the one bit
-     set, the bit was the least significant bit in X.  From this we can
-     use the __clz_tab[] array to compute the number of trailing bits.  */
+     set, the bit that was the least significant bit in X.  From this we
+     can use the count_leading_zeros to compute the number of trailing
+     bits.  */
   x &= - x;
 
-  if (x > 0xff)
-    return __clz_tab[x >> 8] + 7;
-  return __clz_tab[x] - 1;
+  return 15 - __stormy16_count_leading_zeros (x);
+}
+#endif
+
+#ifdef XSTORMY16_FFSHI2
+/* Returns one plus the index of the least significant 1-bit of X,
+   or if X is zero, returns zero.  FIXME:  The return type really
+   should be "unsigned int" but this is not how the builtin is
+   prototyped.  */
+
+int
+__ffshi2 (UHWtype u)
+{
+  UHWtype count;
+
+  if (u == 0)
+    return 0;
+
+  return 16 - __stormy16_count_leading_zeros (u & - u);
+}
+#endif
+
+#ifdef XSTORMY16_COUNT_LEADING_ZEROS
+#undef unsigned
+/* Count the number of zero-bits from the most significant bit to the
+   first nonzero bit in VALUE.  Returns 16 for VALUE == 0.  Implemented
+   as a simple for loop in order to save space by removing the need for
+   the __clz_tab array.  */
+
+unsigned int
+__stormy16_count_leading_zeros (unsigned int value)
+{
+  unsigned int i;
+  unsigned int c;
+
+  for (c = 0, i = 1 << 15; i; i >>= 1, c++)
+    if (i & value)
+      break;
+  return c;
 }
+#endif /* XSTORMY16_COUNT_LEADING_ZEROS */
diff --git a/gcc/config/stormy16/t-stormy16 b/gcc/config/stormy16/t-stormy16
index 4e32c31..b103f88 100644
--- a/gcc/config/stormy16/t-stormy16
+++ b/gcc/config/stormy16/t-stormy16
@@ -21,7 +21,21 @@
 # SImode routines
 
 LIB2FUNCS_EXTRA = \
-	$(srcdir)/config/stormy16/stormy16-lib2.c
+	$(srcdir)/config/stormy16/stormy16-lib2-udivmodsi4.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-divsi3.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-modsi3.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-udivsi3.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-umodsi3.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-ashlsi3.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-ashrsi3.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-lshrsi3.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-popcounthi2.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-parityhi2.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-clzhi2.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-ctzhi2.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-ffshi2.c \
+	$(srcdir)/config/stormy16/stormy16-lib2-count-leading-zeros.c
+
 
 # floating point emulation libraries