* Re: [PATCH v6 2/6] sim: cgen: add MUL2OFSI and MUL1OFSI functions (needed for OR1K l.mul[u])
@ 2017-10-18 20:09 Doug Evans via gdb-patches
0 siblings, 0 replies; 2+ messages in thread
From: Doug Evans via gdb-patches @ 2017-10-18 20:09 UTC (permalink / raw)
To: Stafford Horne
Cc: GDB patches, Simon Marchi, Mike Frysinger, Openrisc, Peter Gavin
Stafford Horne writes:
> 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.
LGTM
^ permalink raw reply [flat|nested] 2+ messages in thread
* [PATCH v6 2/6] sim: cgen: add MUL2OFSI and MUL1OFSI functions (needed for OR1K l.mul[u])
2017-10-13 12:37 [PATCH v6 0/6] sim port for OpenRISC Stafford Horne
@ 2017-10-13 12:37 ` Stafford Horne
0 siblings, 0 replies; 2+ messages in thread
From: Stafford Horne @ 2017-10-13 12:37 UTC (permalink / raw)
To: GDB patches
Cc: Doug Evans, Simon Marchi, Mike Frysinger, Openrisc, Peter Gavin
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(+)
diff --git a/sim/common/cgen-ops.h b/sim/common/cgen-ops.h
index 97585d7943..0fa327630c 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
--
2.13.6
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