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* in the generic implementation of fpc_mul_int64, fallback directly to

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fpc_mul_qword directly in case overflow checking is not used

git-svn-id: trunk@26483 -
This commit is contained in:
nickysn 2014-01-17 01:25:41 +00:00
parent e210d5f30e
commit 34cf432600
1 changed files with 32 additions and 25 deletions
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9
rtl/inc/int64.inc
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@ -310,6 +310,13 @@
q1,q2,q3 : qword; q1,q2,q3 : qword;
begin begin
{ there's no difference between signed and unsigned multiplication,
when the destination size is equal to the source size and overflow
checking is off }
if not checkoverflow then
{ qword(f1)*qword(f2) is coded as a call to mulqword }
fpc_mul_int64:=int64(qword(f1)*qword(f2))
else
begin begin
sign:=false; sign:=false;
if f1<0 then if f1<0 then
@ -329,7 +336,7 @@
{ the q1*q2 is coded as call to mulqword } { the q1*q2 is coded as call to mulqword }
q3:=q1*q2; q3:=q1*q2;
if checkoverflow and (q1 <> 0) and (q2 <>0) and if (q1 <> 0) and (q2 <>0) and
((q1>q3) or (q2>q3) or ((q1>q3) or (q2>q3) or
{ the bit 63 can be only set if we have $80000000 00000000 } { the bit 63 can be only set if we have $80000000 00000000 }
{ and sign is true } { and sign is true }