This is the mail archive of the
gdb-patches@sourceware.org
mailing list for the GDB project.
[PATCH v2 2/6] sim: cgen: add mul-o1flag, mul-o2flag RTL functions to CGEN
- From: Stafford Horne <shorne at gmail dot com>
- To: gdb-patches at sourceware dot org
- Cc: openrisc at lists dot librecores dot org, Peter Gavin <pgavin at gmail dot com>
- Date: Sat, 21 Jan 2017 12:03:51 +0900
- Subject: [PATCH v2 2/6] sim: cgen: add mul-o1flag, mul-o2flag RTL functions to CGEN
- Authentication-results: sourceware.org; auth=none
- References: <cover.1484967575.git.shorne@gmail.com>
- References: <cover.1484967575.git.shorne@gmail.com>
From: Peter Gavin <pgavin@gmail.com>
* sim/common/ChangeLog
2012-03-14 Peter Gavin <pgavin@gmail.com>
* add mul-o1flag (1's complement unsigned multiply overflow flag)
and mul-o2flag (2's complement signed multiply overflow flag)
* cgen-ops.h:
(MUL1OFSI) new function: 1's complement
(MUL2OFSI) new function: 2's complement
---
sim/common/cgen-ops.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/sim/common/cgen-ops.h b/sim/common/cgen-ops.h
index 97585d7..ffbdf3f 100644
--- a/sim/common/cgen-ops.h
+++ b/sim/common/cgen-ops.h
@@ -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
--
2.9.3