diff options
Diffstat (limited to 'ia32/Asmgen.v')
| -rw-r--r-- | ia32/Asmgen.v | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/ia32/Asmgen.v b/ia32/Asmgen.v index 4662f964..ccf2e6fd 100644 --- a/ia32/Asmgen.v +++ b/ia32/Asmgen.v @@ -53,6 +53,13 @@ Definition mk_shrximm (n: int) (k: code) : res code := Pcmov Cond_l RAX RCX :: Psarl_ri RAX n :: k). +Definition mk_shrxlimm (n: int) (k: code) : res code := + OK (if Int.eq n Int.zero then Pmov_rr RAX RAX :: k else + Pcqto :: + Pshrq_ri RDX (Int.sub (Int.repr 64) n) :: + Pleaq RAX (Addrmode (Some RAX) (Some(RDX, 1)) (inl _ 0)) :: + Psarq_ri RAX n :: k). + Definition low_ireg (r: ireg) : bool := match r with RAX | RBX | RCX | RDX => true | _ => false end. @@ -501,6 +508,10 @@ Definition transl_op | Oshrlimm n, a1 :: nil => assertion (mreg_eq a1 res); do r <- ireg_of res; OK (Psarq_ri r n :: k) + | Oshrxlimm n, a1 :: nil => + assertion (mreg_eq a1 AX); + assertion (mreg_eq res AX); + mk_shrxlimm n k | Oshrlu, a1 :: a2 :: nil => assertion (mreg_eq a1 res); assertion (mreg_eq a2 CX); |