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authorDavid Li <li.davidm96@gmail.com>2016-01-07 10:34:36 -0700
committerDavid Li <li.davidm96@gmail.com>2016-01-07 10:34:36 -0700
commit6f92b9ccda52387f0ab6dbfcc0d0b1bed742e9d4 (patch)
tree439cd06ad947099fba6b878fd776258ad4a7a446 /src/register_file.rs
parent7a3dae00d742394a114a9fafbdf25f08cd458ce4 (diff)
Let API user handle syscalls
Diffstat (limited to 'src/register_file.rs')
-rw-r--r--src/register_file.rs40
1 files changed, 40 insertions, 0 deletions
diff --git a/src/register_file.rs b/src/register_file.rs
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+++ b/src/register_file.rs
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+// Copyright 2016 David Li
+// This file is part of rustv.
+
+// rustv is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// rustv is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with rustv. If not, see <http://www.gnu.org/licenses/>.
+
+use isa;
+
+pub struct RegisterFile {
+ registers: [isa::Word; 32],
+}
+
+impl RegisterFile {
+ pub fn new() -> RegisterFile {
+ RegisterFile {
+ registers: [0; 32],
+ }
+ }
+
+ pub fn write_word<T: Into<isa::Register>>(&mut self, reg: T, value: isa::Word) {
+ // TODO: should be safe to use unchecked index
+ let reg = reg.into();
+ if reg == isa::Register::X0 { return; }
+ self.registers[reg.as_num()] = value;
+ }
+
+ pub fn read_word<T: Into<isa::Register>>(&mut self, reg: T) -> isa::Word {
+ self.registers[reg.into().as_num()]
+ }
+}