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| author | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2009-01-11 11:57:02 +0000 |
|---|---|---|
| committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2009-01-11 11:57:02 +0000 |
| commit | bb9d14a3f95fc0e3c8cad10d8ea8e2b2738da7fc (patch) | |
| tree | 3efa5cb51e9bb3edc935f42dbd630fce9a170804 /powerpc/Asm.v | |
| parent | cd2449aabe7b259b0fdb8aaa2af65c2b8957ab32 (diff) | |
| download | compcert-kvx-bb9d14a3f95fc0e3c8cad10d8ea8e2b2738da7fc.tar.gz compcert-kvx-bb9d14a3f95fc0e3c8cad10d8ea8e2b2738da7fc.zip | |
- Added alignment constraints to memory loads and stores.
- In Cminor and below, removed pointer validity check in semantics of
comparisons, so that evaluation of expressions is independent of
memory state.
- In Cminor and below, removed "alloc" instruction.
- Cleaned up commented-away parts.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@945 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'powerpc/Asm.v')
| -rw-r--r-- | powerpc/Asm.v | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/powerpc/Asm.v b/powerpc/Asm.v index b4490afe..69085aa9 100644 --- a/powerpc/Asm.v +++ b/powerpc/Asm.v @@ -100,7 +100,6 @@ Inductive instruction : Set := | Paddi: ireg -> ireg -> constant -> instruction (**r add immediate *) | Paddis: ireg -> ireg -> constant -> instruction (**r add immediate high *) | Paddze: ireg -> ireg -> instruction (**r add Carry bit *) - | Pallocblock: instruction (**r allocate new heap block *) | Pallocframe: Z -> Z -> int -> instruction (**r allocate new stack frame *) | Pand_: ireg -> ireg -> ireg -> instruction (**r bitwise and *) | Pandc: ireg -> ireg -> ireg -> instruction (**r bitwise and-complement *) @@ -293,11 +292,6 @@ lbl: .long 0x43300000, 0x00000000 >> Again, our memory model cannot comprehend that this operation frees (logically) the current stack frame. -- [Pallocheap]: in the formal semantics, this pseudo-instruction - allocates a heap block of size the contents of [GPR3], and leaves - a pointer to this block in [GPR3]. In the generated assembly code, - it is turned into a call to the allocation function of the run-time - system. *) Definition code := list instruction. @@ -554,14 +548,6 @@ Definition exec_instr (c: code) (i: instruction) (rs: regset) (m: mem) : outcome OK (nextinstr (rs#rd <- (Val.add (gpr_or_zero rs r1) (const_high cst)))) m | Paddze rd r1 => OK (nextinstr (rs#rd <- (Val.add rs#r1 rs#CARRY))) m - | Pallocblock => - match rs#GPR3 with - | Vint n => - let (m', b) := Mem.alloc m 0 (Int.signed n) in - OK (nextinstr (rs#GPR3 <- (Vptr b Int.zero) - #LR <- (Val.add rs#PC Vone))) m' - | _ => Error - end | Pallocframe lo hi ofs => let (m1, stk) := Mem.alloc m lo hi in let sp := Vptr stk (Int.repr lo) in |