From 2a0168fea37b68ad14e2cb60bf215111e49d4870 Mon Sep 17 00:00:00 2001 From: xleroy Date: Wed, 23 Jul 2014 08:54:56 +0000 Subject: Merge of "newspilling" branch: - Support single-precision floats as first-class values - Introduce chunks Many32, Many64 and types Tany32, Tany64 to support saving and restoring registers without knowing the exact types (int/single/float) of their contents, just their sizes. - Memory model: generalize the opaque encoding of pointers to apply to any value, not just pointers, if chunks Many32/Many64 are selected. - More properties of FP arithmetic proved. git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@2537 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e --- arm/Archi.v | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) (limited to 'arm/Archi.v') diff --git a/arm/Archi.v b/arm/Archi.v index e6935413..5657f31d 100644 --- a/arm/Archi.v +++ b/arm/Archi.v @@ -25,12 +25,24 @@ Definition big_endian := false. Notation align_int64 := 8%Z (only parsing). Notation align_float64 := 8%Z (only parsing). -Program Definition default_pl : bool * nan_pl 53 := (false, nat_iter 51 xO xH). +Program Definition default_pl_64 : bool * nan_pl 53 := + (false, nat_iter 51 xO xH). -Definition choose_binop_pl (s1: bool) (pl1: nan_pl 53) (s2: bool) (pl2: nan_pl 53) := +Definition choose_binop_pl_64 (s1: bool) (pl1: nan_pl 53) (s2: bool) (pl2: nan_pl 53) := (** Choose second NaN if pl2 is sNaN but pl1 is qNan. In all other cases, choose first NaN *) (Pos.testbit (proj1_sig pl1) 51 && negb (Pos.testbit (proj1_sig pl2) 51))%bool. -Global Opaque big_endian default_pl choose_binop_pl. +Program Definition default_pl_32 : bool * nan_pl 24 := + (false, nat_iter 22 xO xH). + +Definition choose_binop_pl_32 (s1: bool) (pl1: nan_pl 24) (s2: bool) (pl2: nan_pl 24) := + (** Choose second NaN if pl2 is sNaN but pl1 is qNan. + In all other cases, choose first NaN *) + (Pos.testbit (proj1_sig pl1) 22 && + negb (Pos.testbit (proj1_sig pl2) 22))%bool. + +Global Opaque big_endian + default_pl_64 choose_binop_pl_64 + default_pl_32 choose_binop_pl_32. -- cgit