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| author | Tristan Gingold <tgingold@free.fr> | 2019-06-30 14:03:13 +0200 |
|---|---|---|
| committer | Tristan Gingold <tgingold@free.fr> | 2019-06-30 14:03:13 +0200 |
| commit | 33884b2801f3b9cd52a0e6c20ee0d1079982c43d (patch) | |
| tree | 2d6736f7232ac0f91a8c8fd5810ed2ec28b42bab /src | |
| parent | 181165f90d7ab05cff1c2bc5894d0143f03d3634 (diff) | |
| download | ghdl-33884b2801f3b9cd52a0e6c20ee0d1079982c43d.tar.gz ghdl-33884b2801f3b9cd52a0e6c20ee0d1079982c43d.tar.bz2 ghdl-33884b2801f3b9cd52a0e6c20ee0d1079982c43d.zip | |
synth: handle various enum ranges for case stmts.
Diffstat (limited to 'src')
| -rw-r--r-- | src/synth/synth-stmts.adb | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/src/synth/synth-stmts.adb b/src/synth/synth-stmts.adb index 7ac5053e2..f2d9f48e5 100644 --- a/src/synth/synth-stmts.adb +++ b/src/synth/synth-stmts.adb @@ -503,6 +503,7 @@ package body Synth.Stmts is S_Group : constant Uns64 := Els (Iels).Sel and Mask; S_El : Uns64; El_Idx : Natural; + Rsel : Net; begin G := (others => Default); for K in 0 .. 3 loop @@ -514,10 +515,29 @@ package body Synth.Stmts is G (El_Idx) := Els (Iels).Val; Iels := Iels + 1; end loop; - Els (Oels) := - (Sel => S_Group, - Val => Build_Mux4 (Build_Context, - Sub_Sel, G (0), G (1), G (2), G (3))); + if G (3) /= No_Net then + Rsel := Build_Mux4 (Build_Context, + Sub_Sel, G (0), G (1), G (2), G (3)); + elsif G (2) /= No_Net then + Rsel := Build_Mux2 + (Build_Context, + Build_Extract_Bit (Build_Context, + Sel, Width (2 * (I - 1)) + 1), + Build_Mux2 (Build_Context, + Build_Extract_Bit (Build_Context, + Sel, Width (2 * (I - 1))), + G (0), G (1)), + G (2)); + elsif G (1) /= No_Net then + Rsel := Build_Mux2 + (Build_Context, + Build_Extract_Bit (Build_Context, + Sel, Width (2 * (I - 1))), + G (0), G (1)); + else + Rsel := G (0); + end if; + Els (Oels) := (Sel => S_Group, Val => Rsel); Oels := Oels + 1; end; end loop; |