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Start implementing setlocal_wc0

This commit is contained in:
Maxime Chevalier-Boisvert 2020-09-24 15:57:53 -04:00 committed by Alan Wu
parent 5ed7e59365
commit 4d72b9a2f7
2 changed files with 57 additions and 5 deletions
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1
ujit_asm_tests.c
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@ -86,6 +86,7 @@ void run_tests()
// and
cb_set_pos(cb, 0); and(cb, EBP, R12D); check_bytes(cb, "4421E5");
cb_set_pos(cb, 0); and(cb, mem_opnd(64, RAX, 0), imm_opnd(0x08)); check_bytes(cb, "48832008");
// call
{

61
ujit_compile.c
View File

@ -13,6 +13,9 @@
// eg ujit_hook.h
#include "ujit_examples.inc"
// Hash table of encoded instructions
extern st_table *rb_encoded_insn_data;
// Code generation context
typedef struct ctx_struct
{
@ -24,7 +27,7 @@ typedef struct ctx_struct
} ctx_t;
// Code generation function
// MicroJIT code generation function signature
typedef void (*codegen_fn)(codeblock_t* cb, ctx_t* ctx);
// Map from YARV opcodes to code generation functions
@ -34,9 +37,7 @@ static st_table *gen_fns;
static codeblock_t block;
static codeblock_t* cb = NULL;
// Hash table of encoded instructions
extern st_table *rb_encoded_insn_data;
// Initialize MicroJIT. Defined later in this file.
static void ujit_init();
// Ruby instruction entry
@ -312,7 +313,7 @@ void gen_putself(codeblock_t* cb, ctx_t* ctx)
void gen_getlocal_wc0(codeblock_t* cb, ctx_t* ctx)
{
// Load block pointer from CFP
// Load environment pointer EP from CFP
mov(cb, RDX, mem_opnd(64, RDI, 32));
// Compute the offset from BP to the local
@ -327,6 +328,55 @@ void gen_getlocal_wc0(codeblock_t* cb, ctx_t* ctx)
mov(cb, stack_top, RCX);
}
void gen_setlocal_wc0(codeblock_t* cb, ctx_t* ctx)
{
//vm_env_write(vm_get_ep(GET_EP(), level), -(int)idx, val);
/*
vm_env_write(const VALUE *ep, int index, VALUE v)
{
VALUE flags = ep[VM_ENV_DATA_INDEX_FLAGS];
if (LIKELY((flags & VM_ENV_FLAG_WB_REQUIRED) == 0)) {
VM_STACK_ENV_WRITE(ep, index, v);
}
else {
vm_env_write_slowpath(ep, index, v);
}
}
*/
// Load environment pointer EP from CFP
mov(cb, RDX, mem_opnd(64, RDI, 32));
// We could and the flags directly from the mem operand?
x86opnd_t flags_opnd = mem_opnd(64, RAX, 8 * VM_ENV_DATA_INDEX_FLAGS);
// flags & VM_ENV_FLAG_WB_REQUIRED
and(cb, flags_opnd, imm_opnd(VM_ENV_FLAG_WB_REQUIRED));
// TODO: you need a label_idx to jump to here
// if (flags & VM_ENV_FLAG_WB_REQUIRED) != 0
//jnz(cb)
// Get value to write from the stack
x86opnd_t stack_top = ctx_stack_pop(ctx, 1);
mov(cb, RCX, stack_top);
// Compute the offset from BP to the local
int32_t local_idx = (int32_t)ctx_get_arg(ctx, 0);
const int32_t offs = -8 * local_idx;
// Store the local to the block
mov(cb, mem_opnd(64, RDX, offs), RCX);
}
static void ujit_init()
{
// 64MB ought to be enough for anybody
@ -346,4 +396,5 @@ static void ujit_init()
st_insert(gen_fns, (st_data_t)BIN(putobject_INT2FIX_1_), (st_data_t)&gen_putobject_int2fix);
st_insert(gen_fns, (st_data_t)BIN(putself), (st_data_t)&gen_putself);
st_insert(gen_fns, (st_data_t)BIN(getlocal_WC_0), (st_data_t)&gen_getlocal_wc0);
//st_insert(gen_fns, (st_data_t)BIN(setlocal_WC_0), (st_data_t)&gen_setlocal_wc0);
}