[v6,2/6] sim: cgen: add MUL2OFSI and MUL1OFSI functions (needed for OR1K l.mul[u])
Commit Message
From: Peter Gavin <pgavin@gmail.com>
sim/common/ChangeLog:
2012-03-14 Peter Gavin <pgavin@gmail.com>
Stafford Horne <shorne@gmail.com>
* cgen-ops.h (MUL2OFSI): New function, 2's complement overflow
flag.
(MUL1OFSI): New function, 1's complement overflow flag.
---
sim/common/cgen-ops.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
@@ -631,6 +631,22 @@ SUBOFQI (QI a, QI b, BI c)
return res;
}
+SEMOPS_INLINE BI
+MUL2OFSI (SI a, SI b)
+{
+ DI tmp = MULDI (EXTSIDI (a), EXTSIDI (b));
+ BI res = tmp < -0x80000000LL || tmp > 0x7fffffffLL;
+ return res;
+}
+
+SEMOPS_INLINE BI
+MUL1OFSI (USI a, USI b)
+{
+ UDI tmp = MULDI (ZEXTSIDI (a), ZEXTSIDI (b));
+ BI res = (tmp > 0xFFFFFFFFULL);
+ return res;
+}
+
#else
SI ADDCSI (SI, SI, BI);
@@ -651,6 +667,8 @@ UBI ADDOFQI (QI, QI, BI);
QI SUBCQI (QI, QI, BI);
UBI SUBCFQI (QI, QI, BI);
UBI SUBOFQI (QI, QI, BI);
+BI MUL1OFSI (SI a, SI b);
+BI MUL2OFSI (SI a, SI b);
#endif