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Add memoryBase compiler option

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This allows having fixed-size application-specific memory in front, followed by compiler-generated static memory and the heap.
This commit is contained in:
dcodeIO
2018-02-17 00:16:08 +01:00
parent 48cbbbbd68
commit 6b459259f9
7 changed files with 17 additions and 5 deletions
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4
src/compiler.ts
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@ -141,6 +141,8 @@ export class Options {
noAssert: bool = false;
/** If true, does not set up a memory. */
noMemory: bool = false;
/** Static memory start offset. */
memoryBase: u32 = 0;
/** Memory allocation implementation to use. */
allocateImpl: string = "allocate_memory";
/** Memory freeing implementation to use. */
@ -210,7 +212,7 @@ export class Compiler extends DiagnosticEmitter {
super(program.diagnostics);
this.program = program;
this.options = options ? options : new Options();
this.memoryOffset = i64_new(this.options.usizeType.byteSize, 0); // leave space for `null`
this.memoryOffset = i64_new(max(this.options.memoryBase, this.options.usizeType.byteSize), 0); // leave space for `null`
this.module = Module.create();
}