- Revised non-overflow constraints on memory injections so that

  injections compose (Values, Memdata, Memory)
- Memory chunks: Mfloat64 now has alignment 8; introduced Mfloat64al32
  that works like old Mfloat64 (i.e. has alignment 4); simplified
  handling of memcpy builtin accordingly.


git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1983 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e

1 files changed, 7 insertions, 2 deletions

diff --git a/powerpc/Asmgenproof.v b/powerpc/Asmgenproof.v
index e7b7385..e99049c 100644
--- a/powerpc/Asmgenproof.v
+++ b/powerpc/Asmgenproof.v
@@ -827,9 +827,9 @@ Proof.
     rewrite <- H. apply eval_addressing_preserved. exact symbols_preserved.
   left; eapply exec_straight_steps; eauto with coqlib;
   destruct chunk; simpl; simpl in H6;
-  (* all cases but Mint8signed *)
+  (* all cases but Mint8signed and Mfloat64 *)
   try (eapply transl_load_correct; eauto;
-       intros; simpl; unfold preg_of; rewrite H6; auto).
+       intros; simpl; unfold preg_of; rewrite H6; auto; fail).
   (* Mint8signed *)
   exploit loadv_8_signed_unsigned; eauto. intros [v' [LOAD EQ]].
   assert (X1: forall (cst : constant) (r1 : ireg) (rs1 : regset),
@@ -849,6 +849,10 @@ Proof.
   eapply agree_set_twice_mireg; eauto.
   rewrite EQ. apply Val.sign_ext_lessdef. 
   generalize (ireg_val _ _ _ dst AG1 H6). rewrite Regmap.gss. auto.
+  (* Mfloat64 *)
+  exploit Mem.loadv_float64al32; eauto. intros. clear H0.
+  eapply transl_load_correct; eauto;
+  intros; simpl; unfold preg_of; rewrite H6; auto.
 Qed.
 
 Lemma storev_8_signed_unsigned:
@@ -883,6 +887,7 @@ Proof.
   rewrite <- (eval_addressing_preserved _ _ symbols_preserved) in H.
   left; eapply exec_straight_steps_bis; eauto with coqlib.
   destruct chunk; simpl; simpl in H6;
+  try (generalize (Mem.storev_float64al32 _ _ _ _ H0); intros);
   try (rewrite storev_8_signed_unsigned in H0);
   try (rewrite storev_16_signed_unsigned in H0);
   simpl; eapply transl_store_correct; eauto;