mn10300: Add support in longlong.h.

This greatly helps out the DImode division, and to a lesser
extent the DImode multiplication routines in libgcc2.c.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@169018 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index edd22f1..00a9afe 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -3,6 +3,12 @@
        * config/mn10300/mn10300.md (mulsi3): Use reg_or_am33_const_operand.
        (*mulsi3): Likewise.
 
+       * longlong.h [__mn10300__] (count_leading_zeros): New.
+       [__mn10300__] (umul_ppmm, smul_ppmm): New.
+       [__mn10300__] (add_ssaaaa, subddmmss): New.
+       [__mn10300__] (udiv_qrnnd, sdiv_qrnnd): New.
+       [__mn10300__] (UMUL_TIME, UDIV_TIME): New.
+
 2011-01-19  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
 
        * config/spu/spu.h (MOVE_RATIO): Return 4 in the !speed case.

diff --git a/gcc/longlong.h b/gcc/longlong.h
index bb916ae..5937a48 100644 (file)
--- a/gcc/longlong.h
+++ b/gcc/longlong.h
@@ -718,6 +718,43 @@ UDItype __umulsidi3 (USItype, USItype);
 #endif /* __mc88110__ */
 #endif /* __m88000__ */
 
+#if defined (__mn10300__)
+# if defined (__AM33__)
+#  define count_leading_zeros(COUNT,X) ((COUNT) = __builtin_clz (X))
+#  define umul_ppmm(w1, w0, u, v)              \
+    asm("mulu %3,%2,%1,%0" : "=r"(w0), "=r"(w1) : "r"(u), "r"(v))
+#  define smul_ppmm(w1, w0, u, v)              \
+    asm("mul %3,%2,%1,%0" : "=r"(w0), "=r"(w1) : "r"(u), "r"(v))
+# else
+#  define umul_ppmm(w1, w0, u, v)              \
+    asm("nop; nop; mulu %3,%0" : "=d"(w0), "=z"(w1) : "%0"(u), "d"(v))
+#  define smul_ppmm(w1, w0, u, v)              \
+    asm("nop; nop; mul %3,%0" : "=d"(w0), "=z"(w1) : "%0"(u), "d"(v))
+# endif
+# define add_ssaaaa(sh, sl, ah, al, bh, bl)    \
+  do {                                         \
+    DWunion __s, __a, __b;                     \
+    __a.s.low = (al); __a.s.high = (ah);       \
+    __b.s.low = (bl); __b.s.high = (bh);       \
+    __s.ll = __a.ll + __b.ll;                  \
+    (sl) = __s.s.low; (sh) = __s.s.high;       \
+  } while (0)
+# define sub_ddmmss(sh, sl, ah, al, bh, bl)    \
+  do {                                         \
+    DWunion __s, __a, __b;                     \
+    __a.s.low = (al); __a.s.high = (ah);       \
+    __b.s.low = (bl); __b.s.high = (bh);       \
+    __s.ll = __a.ll - __b.ll;                  \
+    (sl) = __s.s.low; (sh) = __s.s.high;       \
+  } while (0)
+# define udiv_qrnnd(q, r, nh, nl, d)           \
+  asm("divu %2,%0" : "=D"(q), "=z"(r) : "D"(d), "0"(nl), "1"(nh))
+# define sdiv_qrnnd(q, r, nh, nl, d)           \
+  asm("div %2,%0" : "=D"(q), "=z"(r) : "D"(d), "0"(nl), "1"(nh))
+# define UMUL_TIME 3
+# define UDIV_TIME 38
+#endif
+
 #if defined (__mips__) && W_TYPE_SIZE == 32
 #define umul_ppmm(w1, w0, u, v)                                                \
   do {                                                                 \