From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stafford Horne Date: Fri, 17 Mar 2017 14:39:08 +0900 Subject: [OpenRISC] [PATCH v3 2/5] sim: cgen: add mul-o1flag, mul-o2flag RTL functions to CGEN In-Reply-To: References: Message-ID: <2b8e80d1edda828c3a11e1ffec5bfbb0a329e526.1489728533.git.shorne@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: openrisc@lists.librecores.org From: Peter Gavin * sim/common/ChangeLog 2012-03-14 Peter Gavin * 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