[PATCH, AArch64 6/6] aarch64: Define add_ssaaaa, sub_ddmmss, umul_ppmm

Richard Henderson rth@redhat.com
Wed Jan 8 18:14:00 GMT 2014


We have good support for TImode arithmetic, so no need to do anything
with inline assembly.

include/
	* longlong.h [__aarch64__] (add_ssaaaa, sub_ddmmss, umul_ppmm): New.
	[__aarch64__] (COUNT_LEADING_ZEROS_0): Define in terms of W_TYPE_SIZE.
---
 include/longlong.h | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/include/longlong.h b/include/longlong.h
index b4c1f400..1b11fc7 100644
--- a/include/longlong.h
+++ b/include/longlong.h
@@ -123,19 +123,35 @@ extern const UQItype __clz_tab[256] attribute_hidden;
 #endif /* __GNUC__ < 2 */
 
 #if defined (__aarch64__)
+#define add_ssaaaa(sh, sl, ah, al, bh, bl)				\
+  do {									\
+    UDWtype __x = (UDWtype)(UWtype)(ah) << 64 | (UWtype)(al);		\
+    __x += (UDWtype)(UWtype)(bh) << 64 | (UWtype)(bl);			\
+    (sh) = __x >> W_TYPE_SIZE;						\
+    (sl) = __x;								\
+  } while (0)
+#define sub_ddmmss(sh, sl, ah, al, bh, bl)				\
+  do {									\
+    UDWtype __x = (UDWtype)(UWtype)(ah) << 64 | (UWtype)(al);		\
+    __x -= (UDWtype)(UWtype)(bh) << 64 | (UWtype)(bl);			\
+    (sh) = __x >> W_TYPE_SIZE;						\
+    (sl) = __x;								\
+  } while (0)
+#define umul_ppmm(ph, pl, m0, m1)					\
+  do {									\
+    UDWtype __x = (UDWtype)(UWtype)(m0) * (UWtype)(m1);			\
+    (ph) = __x >> W_TYPE_SIZE;						\
+    (pl) = __x;								\
+  } while (0)
 
+#define COUNT_LEADING_ZEROS_0   W_TYPE_SIZE
 #if W_TYPE_SIZE == 32
 #define count_leading_zeros(COUNT, X)	((COUNT) = __builtin_clz (X))
 #define count_trailing_zeros(COUNT, X)   ((COUNT) = __builtin_ctz (X))
-#define COUNT_LEADING_ZEROS_0 32
-#endif /* W_TYPE_SIZE == 32 */
-
-#if W_TYPE_SIZE == 64
+#elif W_TYPE_SIZE == 64
 #define count_leading_zeros(COUNT, X)	((COUNT) = __builtin_clzll (X))
 #define count_trailing_zeros(COUNT, X)   ((COUNT) = __builtin_ctzll (X))
-#define COUNT_LEADING_ZEROS_0 64
 #endif /* W_TYPE_SIZE == 64 */
-
 #endif /* __aarch64__ */
 
 #if defined (__alpha) && W_TYPE_SIZE == 64
-- 
1.8.4.2



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