[9fans] kenc vlong double

[cinap_lenrek]

the following code generates unhandled instructions
for the linker on 64 bit simulating archs (8c, 5c):

vlong v;
double d;
v += d;

 == cgen ==
ASADD DOUBLE (1) a.c:13
   NAME "v" -8 <11> VLONG a.c:13
   NAME "d" -16 <11> DOUBLE a.c:13

term% 8c -S a.c
        ...
        FMOVD   d+-16(SP),F0
        MOVL    v+-8(SP),F0                     <- nope.
        FADDDP  F0,F1
        MOVL    F0,v+-8(SP)                     <- nope.
        RET     ,
        END     ,

but works on amd64:

term% 6c -S a.c
        ...
        CVTSQ2SD        v+-8(SP),X0
        ADDSD   d+-16(SP),X0
        CVTTSD2SQ       X0,CX
        RET     ,

the following code works on 8c/5c:

v = v + d;

 == cgen ==
AS VLONG (100) a.c:13
   NAME "v" -8 <11> VLONG a.c:13
   FUNC VLONG (100) a.c:13
      NAME "_d2v" 0 <10> FUNC VLONG a.c:1
      ADD DOUBLE (100) a.c:13
         FUNC DOUBLE (100) a.c:13
            NAME "_v2d" 0 <10> FUNC DOUBLE a.c:1
            NAME "v" -8 <11> VLONG a.c:13
         NAME "d" -16 <11> DOUBLE a.c:13


term% 8c -S a.c
        ....
        MOVL    v+-8(SP),AX
        MOVL    AX,(SP)
        MOVL    v+-4(SP),AX
        MOVL    AX,4(SP)
        CALL    ,_v2d+0(SB)
        FADDD   d+-16(SP),F0
        FMOVDP  F0,.safe+-28(SP)
        LEAL    v+-8(SP),AX
        MOVL    AX,(SP)
        FMOVD   .safe+-28(SP),F0
        FMOVDP  F0,4(SP)
        CALL    ,_d2v+0(SB)

any ideas how to fix this?

--
cinap