From 58884b0e451043ed2fb4d2fba18134f0fb451ce5 Mon Sep 17 00:00:00 2001 From: Peter Gavin Date: Sat, 9 Dec 2017 05:57:25 +0900 Subject: [PATCH] sim: cgen: add MUL2OFSI and MUL1OFSI functions (needed for OR1K l.mul[u]) sim/common/ChangeLog: 2017-12-12 Peter Gavin Stafford Horne * cgen-ops.h (MUL2OFSI): New function, 2's complement overflow flag. (MUL1OFSI): New function, 1's complement overflow flag. --- sim/common/ChangeLog | 7 +++++++ sim/common/cgen-ops.h | 18 ++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog index 091ca429298..313a467c36e 100644 --- a/sim/common/ChangeLog +++ b/sim/common/ChangeLog @@ -1,3 +1,10 @@ +2017-12-12 Peter Gavin + Stafford Horne + + * cgen-ops.h (MUL2OFSI): New function, 2's complement overflow + flag. + (MUL1OFSI): New function, 1's complement overflow flag. + 2017-12-12 Peter Gavin Stafford Horne diff --git a/sim/common/cgen-ops.h b/sim/common/cgen-ops.h index 97585d7943d..0fa327630c4 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 -- 2.30.2