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Implement swap instruction

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Maxime Chevalier-Boisvert 2021-06-30 16:04:25 -04:00 committed by Alan Wu
parent 9e0a56fb24
commit 6cb4edd73f
1 changed files with 23 additions and 0 deletions
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23
yjit_codegen.c
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@ -567,6 +567,28 @@ gen_dupn(jitstate_t* jit, ctx_t* ctx)
return YJIT_KEEP_COMPILING;
}
// Swap top 2 stack entries
static codegen_status_t
gen_swap(jitstate_t* jit, ctx_t* ctx)
{
val_type_t type0 = ctx_get_opnd_type(ctx, OPND_STACK(0));
x86opnd_t opnd0 = ctx_stack_opnd(ctx, 0);
val_type_t type1 = ctx_get_opnd_type(ctx, OPND_STACK(1));
x86opnd_t opnd1 = ctx_stack_opnd(ctx, 1);
mov(cb, REG0, opnd0);
mov(cb, REG1, opnd1);
ctx_set_opnd_type(ctx, OPND_STACK(0), type1);
ctx_set_opnd_type(ctx, OPND_STACK(1), type0);
mov(cb, opnd0, REG1);
mov(cb, opnd1, REG0);
return YJIT_KEEP_COMPILING;
}
// set Nth stack entry to stack top
static codegen_status_t
gen_setn(jitstate_t* jit, ctx_t* ctx)
@ -3406,6 +3428,7 @@ yjit_init_codegen(void)
yjit_reg_op(BIN(nop), gen_nop);
yjit_reg_op(BIN(dup), gen_dup);
yjit_reg_op(BIN(dupn), gen_dupn);
yjit_reg_op(BIN(swap), gen_swap);
yjit_reg_op(BIN(setn), gen_setn);
yjit_reg_op(BIN(topn), gen_topn);
yjit_reg_op(BIN(pop), gen_pop);