https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93449
Bug ID: 93449
Summary: PCC: Missing conversion builtin from vector to
_Decimal128 and vice versa
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jens.seifert at de dot ibm.com
Target Milestone: ---
I am currently porting an application from AIX to PPCLE and found that I am
lacking compiler builtins for transforming vector input into _Decimal128 and
vice versa. This can be done on PowerPC using xxlor + xxpermdi (2 instructions
on >= Power7).
The conversion routines __builtin_denbcdq/__builtin_ddedpdq are based on
_Decimal128 input and output. The missing piece is vector to _Decimal128 and
vice versa.
Background:
>From and to vector register I can load/store variable length BCD decimals.
BCD Decimal can be converted to _Decimal128. Then I can perform multiply and
divide. Then can be converted back to BCD, but then again I want to store a BCD
decimal which might not be 16-byte in size.
