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Fixed bug with ctx_stack_pop. Implemented dup bytecode.

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Maxime Chevalier-Boisvert 2020-09-18 12:40:05 -04:00 • committed by Alan Wu
parent d1c9ca86c1
commit 30c4237b06
1 changed files with 16 additions and 3 deletions
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19
ujit_compile.c
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@ -103,11 +103,13 @@ Return a pointer to the stack top before the pop operation
*/
x86opnd_t ctx_stack_pop(ctx_t* ctx, size_t n)
{
ctx->stack_diff -= n;
// SP points just above the topmost value
int32_t offset = (ctx->stack_diff - 1) * 8;
return mem_opnd(64, RSI, offset);
x86opnd_t top = mem_opnd(64, RSI, offset);
ctx->stack_diff -= n;
return top;
}
/*
@ -217,6 +219,16 @@ ujit_compile_insn(rb_iseq_t *iseq, unsigned int insn_idx, unsigned int* next_uji
return code_ptr;
}
void gen_dup(codeblock_t* cb, ctx_t* ctx)
{
x86opnd_t dup_val = ctx_stack_pop(ctx, 1);
x86opnd_t loc0 = ctx_stack_push(ctx, 1);
x86opnd_t loc1 = ctx_stack_push(ctx, 1);
mov(cb, RAX, dup_val);
mov(cb, loc0, RAX);
mov(cb, loc1, RAX);
}
void gen_nop(codeblock_t* cb, ctx_t* ctx)
{
// Do nothing
@ -294,6 +306,7 @@ static void ujit_init()
gen_fns = rb_st_init_numtable();
// Map YARV opcodes to the corresponding codegen functions
st_insert(gen_fns, (st_data_t)BIN(dup), (st_data_t)&gen_dup);
st_insert(gen_fns, (st_data_t)BIN(nop), (st_data_t)&gen_nop);
st_insert(gen_fns, (st_data_t)BIN(pop), (st_data_t)&gen_pop);
st_insert(gen_fns, (st_data_t)BIN(putnil), (st_data_t)&gen_putnil);