diff options
Diffstat (limited to 'mppa_k1c/Asmvliw.v')
| -rw-r--r-- | mppa_k1c/Asmvliw.v | 240 |
1 files changed, 144 insertions, 96 deletions
diff --git a/mppa_k1c/Asmvliw.v b/mppa_k1c/Asmvliw.v index 3bef1a5c..946007c1 100644 --- a/mppa_k1c/Asmvliw.v +++ b/mppa_k1c/Asmvliw.v @@ -17,8 +17,6 @@ (** Abstract syntax and semantics for VLIW semantics of K1c assembly language. *) -(* FIXME: develop/fix the comments in this file *) - Require Import Coqlib. Require Import Maps. Require Import AST. @@ -45,8 +43,7 @@ Require Import Chunks. this view induces our sequential semantics of bundles defined in [Asmblock]. *) -(** General Purpose registers. -*) +(** General Purpose registers. *) Inductive gpreg: Type := | GPR0: gpreg | GPR1: gpreg | GPR2: gpreg | GPR3: gpreg | GPR4: gpreg @@ -148,13 +145,10 @@ Definition gpreg_o_expand (x : gpreg_o) : gpreg * gpreg * gpreg * gpreg := | R56R57R58R59 => (GPR56, GPR57, GPR58, GPR59) | R60R61R62R63 => (GPR60, GPR61, GPR62, GPR63) end. - + Lemma gpreg_o_eq : forall (x y : gpreg_o), {x=y} + {x<>y}. Proof. decide equality. Defined. -(** We model the following registers of the RISC-V architecture. *) - -(** basic register *) Inductive preg: Type := | IR: gpreg -> preg (**r integer general purpose registers *) | RA: preg @@ -173,7 +167,7 @@ End PregEq. Module Pregmap := EMap(PregEq). -(** Conventional names for stack pointer ([SP]) and return address ([RA]). *) +(** Conventional names for stack pointer ([SP]), return address ([RA]), frame pointer ([FP]) and other temporaries used *) Notation "'SP'" := GPR12 (only parsing) : asm. Notation "'FP'" := GPR17 (only parsing) : asm. @@ -188,9 +182,7 @@ Inductive btest: Type := | BTdgez (**r Double Greater Than or Equal to Zero *) | BTdlez (**r Double Less Than or Equal to Zero *) | BTdgtz (**r Double Greater Than Zero *) -(*| BTodd (**r Odd (LSB Set) *) - | BTeven (**r Even (LSB Clear) *) -*)| BTwnez (**r Word Not Equal to Zero *) + | BTwnez (**r Word Not Equal to Zero *) | BTweqz (**r Word Equal to Zero *) | BTwltz (**r Word Less Than Zero *) | BTwgez (**r Word Greater Than or Equal to Zero *) @@ -211,11 +203,6 @@ Inductive itest: Type := | ITgeu (**r Greater Than or Equal Unsigned *) | ITleu (**r Less Than or Equal Unsigned *) | ITgtu (**r Greater Than Unsigned *) - (* Not used yet *) - | ITall (**r All Bits Set in Mask *) - | ITnall (**r Not All Bits Set in Mask *) - | ITany (**r Any Bits Set in Mask *) - | ITnone (**r Not Any Bits Set in Mask *) . Inductive ftest: Type := @@ -251,16 +238,7 @@ Definition offset : Type := ptrofs. Definition label := positive. -(* FIXME - rewrite the comment *) -(** A note on immediates: there are various constraints on immediate - operands to K1c instructions. We do not attempt to capture these - restrictions in the abstract syntax nor in the semantics. The - assembler will emit an error if immediate operands exceed the - representable range. Of course, our K1c generator (file - [Asmgen]) is careful to respect this range. *) - -(** Instructions to be expanded in control-flow -*) +(** Instructions to be expanded in control-flow *) Inductive ex_instruction : Type := (* Pseudo-instructions *) | Pbuiltin: external_function -> list (builtin_arg preg) @@ -330,6 +308,16 @@ Inductive cf_instruction : Type := . (** Loads **) +Definition concrete_default_notrap_load_value (chunk : memory_chunk) := + match chunk with + | Mint8signed | Mint8unsigned | Mint16signed | Mint16unsigned + | Mint32 => Vint Int.zero + | Mint64 => Vlong Int64.zero + | Many32 | Many64 => Vundef + | Mfloat32 => Vsingle Float32.zero + | Mfloat64 => Vfloat Float.zero + end. + Inductive load_name : Type := | Plb (**r load byte *) | Plbu (**r load byte unsigned *) @@ -344,9 +332,9 @@ Inductive load_name : Type := . Inductive ld_instruction : Type := - | PLoadRRO (i: load_name) (rd: ireg) (ra: ireg) (ofs: offset) - | PLoadRRR (i: load_name) (rd: ireg) (ra: ireg) (rofs: ireg) - | PLoadRRRXS (i: load_name) (rd: ireg) (ra: ireg) (rofs: ireg) + | PLoadRRO (trap: trapping_mode) (i: load_name) (rd: ireg) (ra: ireg) (ofs: offset) + | PLoadRRR (trap: trapping_mode) (i: load_name) (rd: ireg) (ra: ireg) (rofs: ireg) + | PLoadRRRXS (trap: trapping_mode) (i: load_name) (rd: ireg) (ra: ireg) (rofs: ireg) | PLoadQRRO (rd: gpreg_q) (ra: ireg) (ofs: offset) | PLoadORRO (rd: gpreg_o) (ra: ireg) (ofs: offset) . @@ -392,6 +380,7 @@ Inductive arith_name_rr : Type := | Pfabsw (**r float absolute word *) | Pfnegd (**r float negate double *) | Pfnegw (**r float negate word *) + | Pfinvw (**r float invert word *) | Pfnarrowdw (**r float narrow 64 -> 32 bits *) | Pfwidenlwd (**r Floating Point widen from 32 bits to 64 bits *) | Pfloatwrnsz (**r Floating Point conversion from integer (int -> SINGLE) *) @@ -429,7 +418,9 @@ Inductive arith_name_rrr : Type := | Pfcompl (ft: ftest) (**r comparison float64 *) | Paddw (**r add word *) - | Psubw (**r sub word *) + | Paddxw (shift : shift1_4) (**r add shift *) + | Psubw (**r sub word word *) + | Prevsubxw (shift : shift1_4) (**r sub shift word *) | Pmulw (**r mul word *) | Pandw (**r and word *) | Pnandw (**r nand word *) @@ -445,7 +436,9 @@ Inductive arith_name_rrr : Type := | Psllw (**r shift left logical word *) | Paddl (**r add long *) + | Paddxl (shift : shift1_4) (**r add shift long *) | Psubl (**r sub long *) + | Prevsubxl (shift : shift1_4) (**r sub shift long *) | Pandl (**r and long *) | Pnandl (**r nand long *) | Porl (**r or long *) @@ -466,12 +459,19 @@ Inductive arith_name_rrr : Type := | Pfsbfw (**r float sub word *) | Pfmuld (**r float multiply double *) | Pfmulw (**r float multiply word *) + | Pfmind (**r float min double *) + | Pfminw (**r float min word *) + | Pfmaxd (**r float max double *) + | Pfmaxw (**r float max word *) . Inductive arith_name_rri32 : Type := | Pcompiw (it: itest) (**r comparison imm word *) | Paddiw (**r add imm word *) + | Paddxiw (shift : shift1_4) + | Prevsubiw (**r add imm word *) + | Prevsubxiw (shift : shift1_4) | Pmuliw (**r add imm word *) | Pandiw (**r and imm word *) | Pnandiw (**r nand imm word *) @@ -495,6 +495,9 @@ Inductive arith_name_rri32 : Type := Inductive arith_name_rri64 : Type := | Pcompil (it: itest) (**r comparison imm long *) | Paddil (**r add immediate long *) + | Paddxil (shift : shift1_4) + | Prevsubil + | Prevsubxil (shift : shift1_4) | Pmulil (**r mul immediate long *) | Pandil (**r and immediate long *) | Pnandil (**r nand immediate long *) @@ -509,16 +512,26 @@ Inductive arith_name_rri64 : Type := Inductive arith_name_arrr : Type := | Pmaddw (**r multiply add word *) | Pmaddl (**r multiply add long *) + | Pmsubw (**r multiply subtract word *) + | Pmsubl (**r multiply subtract long *) | Pcmove (bt: btest) (**r conditional move *) | Pcmoveu (bt: btest) (**r conditional move, test on unsigned semantics *) + | Pfmaddfw (**r float fused multiply add word *) + | Pfmaddfl (**r float fused multiply add long *) + | Pfmsubfw (**r float fused multiply subtract word *) + | Pfmsubfl (**r float fused multiply subtract long *) . Inductive arith_name_arri32 : Type := | Pmaddiw (**r multiply add word *) + | Pcmoveiw (bt: btest) + | Pcmoveuiw (bt: btest) . Inductive arith_name_arri64 : Type := | Pmaddil (**r multiply add long *) + | Pcmoveil (bt: btest) + | Pcmoveuil (bt: btest) . Inductive arith_name_arr : Type := @@ -542,6 +555,8 @@ Inductive ar_instruction : Type := | PArithARRI64 (i: arith_name_arri64) (rd rs: ireg) (imm: int64) . +Module PArithCoercions. + Coercion PArithR: arith_name_r >-> Funclass. Coercion PArithRR: arith_name_rr >-> Funclass. Coercion PArithRI32: arith_name_ri32 >-> Funclass. @@ -556,6 +571,8 @@ Coercion PArithARR: arith_name_arr >-> Funclass. Coercion PArithARRI32: arith_name_arri32 >-> Funclass. Coercion PArithARRI64: arith_name_arri64 >-> Funclass. +End PArithCoercions. + Inductive basic : Type := | PArith (i: ar_instruction) | PLoad (i: ld_instruction) @@ -901,10 +918,6 @@ Definition compare_int (t: itest) (v1 v2: val): val := | ITgeu => Val_cmpu Cge v1 v2 | ITleu => Val_cmpu Cle v1 v2 | ITgtu => Val_cmpu Cgt v1 v2 - | ITall - | ITnall - | ITany - | ITnone => Vundef end. Definition compare_long (t: itest) (v1 v2: val): val := @@ -921,10 +934,6 @@ Definition compare_long (t: itest) (v1 v2: val): val := | ITgeu => Some (Val_cmplu Cge v1 v2) | ITleu => Some (Val_cmplu Cle v1 v2) | ITgtu => Some (Val_cmplu Cgt v1 v2) - | ITall - | ITnall - | ITany - | ITnone => Some Vundef end in match res with | Some v => v @@ -976,6 +985,7 @@ Definition arith_eval_rr n v := | Pfnegw => Val.negfs v | Pfabsd => Val.absf v | Pfabsw => Val.absfs v + | Pfinvw => ExtValues.invfs v | Pfnarrowdw => Val.singleoffloat v | Pfwidenlwd => Val.floatofsingle v | Pfloatwrnsz => match Val.singleofint v with Some f => f | _ => Vundef end @@ -1055,12 +1065,24 @@ Definition arith_eval_rrr n v1 v2 := | Pfsbfw => Val.subfs v1 v2 | Pfmuld => Val.mulf v1 v2 | Pfmulw => Val.mulfs v1 v2 + + | Pfmind => ExtValues.minf v1 v2 + | Pfminw => ExtValues.minfs v1 v2 + | Pfmaxd => ExtValues.maxf v1 v2 + | Pfmaxw => ExtValues.maxfs v1 v2 + + | Paddxw shift => ExtValues.addx (int_of_shift1_4 shift) v1 v2 + | Paddxl shift => ExtValues.addxl (int_of_shift1_4 shift) v1 v2 + + | Prevsubxw shift => ExtValues.revsubx (int_of_shift1_4 shift) v1 v2 + | Prevsubxl shift => ExtValues.revsubxl (int_of_shift1_4 shift) v1 v2 end. Definition arith_eval_rri32 n v i := match n with | Pcompiw c => compare_int c v (Vint i) | Paddiw => Val.add v (Vint i) + | Prevsubiw => Val.sub (Vint i) v | Pmuliw => Val.mul v (Vint i) | Pandiw => Val.and v (Vint i) | Pnandiw => Val.notint (Val.and v (Vint i)) @@ -1079,12 +1101,15 @@ Definition arith_eval_rri32 n v i := | Psrxil => ExtValues.val_shrxl v (Vint i) | Psrlil => Val.shrlu v (Vint i) | Psrail => Val.shrl v (Vint i) + | Paddxiw shift => ExtValues.addx (int_of_shift1_4 shift) v (Vint i) + | Prevsubxiw shift => ExtValues.revsubx (int_of_shift1_4 shift) v (Vint i) end. Definition arith_eval_rri64 n v i := match n with | Pcompil c => compare_long c v (Vlong i) | Paddil => Val.addl v (Vlong i) + | Prevsubil => Val.subl (Vlong i) v | Pmulil => Val.mull v (Vlong i) | Pandil => Val.andl v (Vlong i) | Pnandil => Val.notl (Val.andl v (Vlong i)) @@ -1094,44 +1119,56 @@ Definition arith_eval_rri64 n v i := | Pnxoril => Val.notl (Val.xorl v (Vlong i)) | Pandnil => Val.andl (Val.notl v) (Vlong i) | Pornil => Val.orl (Val.notl v) (Vlong i) + | Paddxil shift => ExtValues.addxl (int_of_shift1_4 shift) v (Vlong i) + | Prevsubxil shift => ExtValues.revsubxl (int_of_shift1_4 shift) v (Vlong i) + end. + +Definition cmove bt v1 v2 v3 := + match cmp_for_btest bt with + | (Some c, Int) => + match Val.cmp_bool c v2 (Vint Int.zero) with + | None => Vundef + | Some true => v3 + | Some false => v1 + end + | (Some c, Long) => + match Val.cmpl_bool c v2 (Vlong Int64.zero) with + | None => Vundef + | Some true => v3 + | Some false => v1 + end + | (None, _) => Vundef + end. + +Definition cmoveu bt v1 v2 v3 := + match cmpu_for_btest bt with + | (Some c, Int) => + match Val_cmpu_bool c v2 (Vint Int.zero) with + | None => Vundef + | Some true => v3 + | Some false => v1 + end + | (Some c, Long) => + match Val_cmplu_bool c v2 (Vlong Int64.zero) with + | None => Vundef + | Some true => v3 + | Some false => v1 + end + | (None, _) => Vundef end. Definition arith_eval_arrr n v1 v2 v3 := match n with | Pmaddw => Val.add v1 (Val.mul v2 v3) | Pmaddl => Val.addl v1 (Val.mull v2 v3) - | Pcmove bt => - match cmp_for_btest bt with - | (Some c, Int) => - match Val.cmp_bool c v2 (Vint Int.zero) with - | None => Vundef - | Some true => v3 - | Some false => v1 - end - | (Some c, Long) => - match Val.cmpl_bool c v2 (Vlong Int64.zero) with - | None => Vundef - | Some true => v3 - | Some false => v1 - end - | (None, _) => Vundef - end - | Pcmoveu bt => - match cmpu_for_btest bt with - | (Some c, Int) => - match Val_cmpu_bool c v2 (Vint Int.zero) with - | None => Vundef - | Some true => v3 - | Some false => v1 - end - | (Some c, Long) => - match Val_cmplu_bool c v2 (Vlong Int64.zero) with - | None => Vundef - | Some true => v3 - | Some false => v1 - end - | (None, _) => Vundef - end + | Pmsubw => Val.sub v1 (Val.mul v2 v3) + | Pmsubl => Val.subl v1 (Val.mull v2 v3) + | Pcmove bt => cmove bt v1 v2 v3 + | Pcmoveu bt => cmoveu bt v1 v2 v3 + | Pfmaddfw => ExtValues.fmaddfs v1 v2 v3 + | Pfmaddfl => ExtValues.fmaddf v1 v2 v3 + | Pfmsubfw => ExtValues.fmsubfs v1 v2 v3 + | Pfmsubfl => ExtValues.fmsubf v1 v2 v3 end. Definition arith_eval_arr n v1 v2 := @@ -1143,11 +1180,15 @@ Definition arith_eval_arr n v1 v2 := Definition arith_eval_arri32 n v1 v2 v3 := match n with | Pmaddiw => Val.add v1 (Val.mul v2 (Vint v3)) + | Pcmoveiw bt => cmove bt v1 v2 (Vint v3) + | Pcmoveuiw bt => cmoveu bt v1 v2 (Vint v3) end. Definition arith_eval_arri64 n v1 v2 v3 := match n with | Pmaddil => Val.addl v1 (Val.mull v2 (Vlong v3)) + | Pcmoveil bt => cmove bt v1 v2 (Vlong v3) + | Pcmoveuil bt => cmoveu bt v1 v2 (Vlong v3) end. Definition parexec_arith_instr (ai: ar_instruction) (rsr rsw: regset): regset := @@ -1175,10 +1216,16 @@ Definition eval_offset (ofs: offset) : res ptrofs := OK ofs. (** * load/store *) -Definition parexec_load_offset (chunk: memory_chunk) (rsr rsw: regset) (mr mw: mem) (d a: ireg) (ofs: offset) := +Definition parexec_incorrect_load trap chunk d rsw mw := + match trap with + | TRAP => Stuck + | NOTRAP => Next (rsw#d <- (concrete_default_notrap_load_value chunk)) mw + end. + +Definition parexec_load_offset (trap: trapping_mode) (chunk: memory_chunk) (rsr rsw: regset) (mr mw: mem) (d a: ireg) (ofs: offset) := match (eval_offset ofs) with | OK ptr => match Mem.loadv chunk mr (Val.offset_ptr (rsr a) ptr) with - | None => Stuck + | None => parexec_incorrect_load trap chunk d rsw mw | Some v => Next (rsw#d <- v) mw end | _ => Stuck @@ -1223,15 +1270,15 @@ Definition parexec_load_o_offset (rsr rsw: regset) (mr mw: mem) (d : gpreg_o) (a end end. -Definition parexec_load_reg (chunk: memory_chunk) (rsr rsw: regset) (mr mw: mem) (d a ro: ireg) := +Definition parexec_load_reg (trap: trapping_mode) (chunk: memory_chunk) (rsr rsw: regset) (mr mw: mem) (d a ro: ireg) := match Mem.loadv chunk mr (Val.addl (rsr a) (rsr ro)) with - | None => Stuck + | None => parexec_incorrect_load trap chunk d rsw mw | Some v => Next (rsw#d <- v) mw end. -Definition parexec_load_regxs (chunk: memory_chunk) (rsr rsw: regset) (mr mw: mem) (d a ro: ireg) := +Definition parexec_load_regxs (trap: trapping_mode) (chunk: memory_chunk) (rsr rsw: regset) (mr mw: mem) (d a ro: ireg) := match Mem.loadv chunk mr (Val.addl (rsr a) (Val.shll (rsr ro) (scale_of_chunk chunk))) with - | None => Stuck + | None => parexec_incorrect_load trap chunk d rsw mw | Some v => Next (rsw#d <- v) mw end. @@ -1244,7 +1291,8 @@ Definition parexec_store_offset (chunk: memory_chunk) (rsr rsw: regset) (mr mw: | _ => Stuck end. -Definition parexec_store_reg (chunk: memory_chunk) (rsr rsw: regset) (mr mw: mem) (s a ro: ireg) := +Definition parexec_store_reg + (chunk: memory_chunk) (rsr rsw: regset) (mr mw: mem) (s a ro: ireg) := match Mem.storev chunk mr (Val.addl (rsr a) (rsr ro)) (rsr s) with | None => Stuck | Some m' => Next rsw m' @@ -1302,7 +1350,7 @@ Definition load_chunk n := | Pfls => Mfloat32 | Pfld => Mfloat64 end. - + Definition store_chunk n := match n with | Psb => Mint8unsigned @@ -1317,16 +1365,16 @@ Definition store_chunk n := (** * basic instructions *) -Definition parexec_basic_instr (bi: basic) (rsr rsw: regset) (mr mw: mem) := +Definition bstep (bi: basic) (rsr rsw: regset) (mr mw: mem) := match bi with | PArith ai => Next (parexec_arith_instr ai rsr rsw) mw - | PLoadRRO n d a ofs => parexec_load_offset (load_chunk n) rsr rsw mr mw d a ofs - | PLoadRRR n d a ro => parexec_load_reg (load_chunk n) rsr rsw mr mw d a ro - | PLoadRRRXS n d a ro => parexec_load_regxs (load_chunk n) rsr rsw mr mw d a ro - | PLoadQRRO d a ofs => + | PLoad (PLoadRRO trap n d a ofs) => parexec_load_offset trap (load_chunk n) rsr rsw mr mw d a ofs + | PLoad (PLoadRRR trap n d a ro) => parexec_load_reg trap (load_chunk n) rsr rsw mr mw d a ro + | PLoad (PLoadRRRXS trap n d a ro) => parexec_load_regxs trap (load_chunk n) rsr rsw mr mw d a ro + | PLoad (PLoadQRRO d a ofs) => parexec_load_q_offset rsr rsw mr mw d a ofs - | PLoadORRO d a ofs => + | PLoad (PLoadORRO d a ofs) => parexec_load_o_offset rsr rsw mr mw d a ofs | PStoreRRO n s a ofs => parexec_store_offset (store_chunk n) rsr rsw mr mw s a ofs @@ -1376,7 +1424,7 @@ Fixpoint parexec_wio_body (body: list basic) (rsr rsw: regset) (mr mw: mem) := match body with | nil => Next rsw mw | bi::body' => - match parexec_basic_instr bi rsr rsw mr mw with + match bstep bi rsr rsw mr mw with | Next rsw mw => parexec_wio_body body' rsr rsw mr mw | Stuck => Stuck end @@ -1512,19 +1560,19 @@ Definition incrPC size_b (rs: regset) := rs#PC <- (Val.offset_ptr rs#PC size_b). (** parallel execution of the exit instruction of a bundle *) -Definition parexec_exit (f: function) ext size_b (rsr rsw: regset) (mw: mem) +Definition estep (f: function) ext size_b (rsr rsw: regset) (mw: mem) := parexec_control f ext (incrPC size_b rsr) rsw mw. -Definition parexec_wio_bblock_aux f bdy ext size_b (rsr rsw: regset) (mr mw: mem): outcome := - match parexec_wio_body bdy rsr rsw mr mw with - | Next rsw mw => parexec_exit f ext size_b rsr rsw mw +Definition parexec_wio f bdy ext size_b (rs: regset) (m: mem): outcome := + match parexec_wio_body bdy rs rs m m with + | Next rsw mw => estep f ext size_b rs rsw mw | Stuck => Stuck end. (** non-deterministic (out-of-order writes) parallel execution of bundles *) Definition parexec_bblock (f: function) (bundle: bblock) (rs: regset) (m: mem) (o: outcome): Prop := exists bdy1 bdy2, Permutation (bdy1++bdy2) (body bundle) /\ - o=match parexec_wio_bblock_aux f bdy1 (exit bundle) (Ptrofs.repr (size bundle)) rs rs m m with + o=match parexec_wio f bdy1 (exit bundle) (Ptrofs.repr (size bundle)) rs m with | Next rsw mw => parexec_wio_body bdy2 rs rsw m mw | Stuck => Stuck end. @@ -1651,7 +1699,7 @@ Inductive step: state -> trace -> state -> Prop := (** parallel in-order writes execution of bundles *) Definition parexec_wio_bblock (f: function) (b: bblock) (rs: regset) (m: mem): outcome := - parexec_wio_bblock_aux f (body b) (exit b) (Ptrofs.repr (size b)) rs rs m m. + parexec_wio f (body b) (exit b) (Ptrofs.repr (size b)) rs m. Lemma parexec_bblock_write_in_order f b rs m: @@ -1661,11 +1709,11 @@ Proof. constructor 1. - rewrite app_nil_r; auto. - unfold parexec_wio_bblock. - destruct (parexec_wio_bblock_aux f _ _ _ _ _); simpl; auto. + destruct (parexec_wio f _ _ _); simpl; auto. Qed. -Local Hint Resolve parexec_bblock_write_in_order. +Local Hint Resolve parexec_bblock_write_in_order: core. Lemma det_parexec_write_in_order f b rs m rs' m': det_parexec f b rs m rs' m' -> parexec_wio_bblock f b rs m = Next rs' m'. @@ -1739,9 +1787,9 @@ Ltac Det_WIO X := - (* determ *) intros s t1 s1 t2 s2 H H0. inv H; Det_WIO X1; inv H0; Det_WIO X2; Equalities. + split. constructor. auto. - + unfold parexec_wio_bblock, parexec_wio_bblock_aux in X1. destruct (parexec_wio_body _ _ _ _ _ _); try discriminate. + + unfold parexec_wio_bblock, parexec_wio in X1. destruct (parexec_wio_body _ _ _ _ _ _); try discriminate. rewrite H8 in X1. discriminate. - + unfold parexec_wio_bblock, parexec_wio_bblock_aux in X2. destruct (parexec_wio_body _ _ _ _ _ _); try discriminate. + + unfold parexec_wio_bblock, parexec_wio in X2. destruct (parexec_wio_body _ _ _ _ _ _); try discriminate. rewrite H4 in X2. discriminate. + assert (vargs0 = vargs) by (eapply eval_builtin_args_determ; eauto). subst vargs0. exploit external_call_determ. eexact H6. eexact H13. intros [A B]. |