From 49342474c19558709c8cea6d70eaba9a4dd7a150 Mon Sep 17 00:00:00 2001 From: Xavier Leroy Date: Mon, 15 Apr 2019 17:50:30 +0200 Subject: Implement a `Osel` operation for ARM The operation comples down to conditional moves. Both integer and floating-point conditional moves are supported. --- arm/Asm.v | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arm/Asm.v') diff --git a/arm/Asm.v b/arm/Asm.v index e6d1b4fc..194074ac 100644 --- a/arm/Asm.v +++ b/arm/Asm.v @@ -220,6 +220,7 @@ Inductive instruction : Type := | Plabel: label -> instruction (**r define a code label *) | Ploadsymbol: ireg -> ident -> ptrofs -> instruction (**r load the address of a symbol *) | Pmovite: testcond -> ireg -> shift_op -> shift_op -> instruction (**r integer conditional move *) + | Pfmovite: testcond -> freg -> freg -> freg -> instruction (**r FP conditional move *) | Pbtbl: ireg -> list label -> instruction (**r N-way branch through a jump table *) | Pbuiltin: external_function -> list (builtin_arg preg) -> builtin_res preg -> instruction (**r built-in function (pseudo) *) | Padc: ireg -> ireg -> shift_op -> instruction (**r add with carry *) @@ -783,6 +784,14 @@ Definition exec_instr (f: function) (i: instruction) (rs: regset) (m: mem) : out | None => Vundef end in Next (nextinstr (rs#r1 <- v)) m + | Pfmovite cond r1 ifso ifnot => + let v := + match eval_testcond cond rs with + | Some true => rs#ifso + | Some false => rs#ifnot + | None => Vundef + end in + Next (nextinstr (rs#r1 <- v)) m | Pbtbl r tbl => match rs#r with | Vint n => -- cgit