From 71e4f3812982dba2efb471283d310224e8db363e Mon Sep 17 00:00:00 2001 From: "Kartik K. Agaram" Date: Wed, 3 Mar 2021 22:09:50 -0800 Subject: 7842 - new directory organization Baremetal is now the default build target and therefore has its sources at the top-level. Baremetal programs build using the phase-2 Mu toolchain that requires a Linux kernel. This phase-2 codebase which used to be at the top-level is now under the linux/ directory. Finally, the phase-2 toolchain, while self-hosting, has a way to bootstrap from a C implementation, which is now stored in linux/bootstrap. The bootstrap C implementation uses some literate programming tools that are now in linux/bootstrap/tools. So the whole thing has gotten inverted. Each directory should build one artifact and include the main sources (along with standard library). Tools used for building it are relegated to sub-directories, even though those tools are often useful in their own right, and have had lots of interesting programs written using them. A couple of things have gotten dropped in this process: - I had old ways to run on just a Linux kernel, or with a Soso kernel. No more. - I had some old tooling for running a single test at the cursor. I haven't used that lately. Maybe I'll bring it back one day. The reorg isn't done yet. Still to do: - redo documentation everywhere. All the README files, all other markdown, particularly vocabulary.md. - clean up how-to-run comments at the start of programs everywhere - rethink what to do with the html/ directory. Do we even want to keep supporting it? In spite of these shortcomings, all the scripts at the top-level, linux/ and linux/bootstrap are working. The names of the scripts also feel reasonable. This is a good milestone to take stock at. --- 021div.cc | 38 -------------------------------------- 1 file changed, 38 deletions(-) delete mode 100644 021div.cc (limited to '021div.cc') diff --git a/021div.cc b/021div.cc deleted file mode 100644 index 15ed89d8..00000000 --- a/021div.cc +++ /dev/null @@ -1,38 +0,0 @@ -//: helper for division operations: sign-extend EAX into EDX - -:(before "End Initialize Op Names") -put_new(Name, "99", "sign-extend EAX into EDX (cdq)"); - -:(code) -void test_cdq() { - Reg[EAX].i = 10; - run( - "== code 0x1\n" - "99\n" - ); - CHECK_TRACE_CONTENTS( - "run: sign-extend EAX into EDX\n" - "run: EDX is now 0x00000000\n" - ); -} - -:(before "End Single-Byte Opcodes") -case 0x99: { // sign-extend EAX into EDX - trace(Callstack_depth+1, "run") << "sign-extend EAX into EDX" << end(); - Reg[EDX].i = (Reg[EAX].i < 0) ? -1 : 0; - trace(Callstack_depth+1, "run") << "EDX is now 0x" << HEXWORD << Reg[EDX].u << end(); - break; -} - -:(code) -void test_cdq_negative() { - Reg[EAX].i = -10; - run( - "== code 0x1\n" - "99\n" - ); - CHECK_TRACE_CONTENTS( - "run: sign-extend EAX into EDX\n" - "run: EDX is now 0xffffffff\n" - ); -} -- cgit 1.4.1-2-gfad0