Commit 431291ca authored by Christian Würdig's avatar Christian Würdig
Browse files

in case of SSE: copy xmm0 to FPU TOS

parent ae94c294
......@@ -2322,6 +2322,54 @@ static ir_node *gen_be_Call(ia32_transform_env_t *env) {
return NULL;
}
/**
* In case SSE is used we need to copy the result from XMM0 to FPU TOS before return.
*/
static ir_node *gen_be_Return(ia32_transform_env_t *env) {
ir_node *ret_val = get_irn_n(env->irn, be_pos_Return_val);
ir_node *ret_mem = get_irn_n(env->irn, be_pos_Return_mem);
ir_mode *mode;
if (! ret_val || ! USE_SSE2(env->cg))
return NULL;
mode = get_irn_mode(ret_val);
if (mode_is_float(mode)) {
ir_node *frame = get_irg_frame(env->irg);
entity *ent = frame_alloc_area(get_irg_frame_type(env->irg), get_mode_size_bytes(mode), 16, 0);
ir_node *sse_store, *fld, *mproj;
/* store xmm0 onto stack */
sse_store = new_rd_ia32_xStoreSimple(env->dbg, env->irg, env->block, frame, ret_val, ret_mem);
set_ia32_ls_mode(sse_store, mode);
set_ia32_op_type(sse_store, ia32_AddrModeD);
set_ia32_use_frame(sse_store);
set_ia32_frame_ent(sse_store, ent);
set_ia32_am_flavour(sse_store, ia32_B);
set_ia32_am_support(sse_store, ia32_am_Dest);
sse_store = new_r_Proj(env->irg, env->block, sse_store, mode_M, pn_ia32_xStore_M);
/* load into st0 */
fld = new_rd_ia32_SetST0(env->dbg, env->irg, env->block, frame, sse_store);
set_ia32_ls_mode(fld, mode);
set_ia32_op_type(fld, ia32_AddrModeS);
set_ia32_use_frame(fld);
set_ia32_frame_ent(fld, ent);
set_ia32_am_flavour(fld, ia32_B);
set_ia32_am_support(fld, ia32_am_Source);
mproj = new_r_Proj(env->irg, env->block, fld, mode_M, pn_ia32_SetST0_M);
fld = new_r_Proj(env->irg, env->block, fld, mode, pn_ia32_SetST0_res);
/* set new return value */
set_irn_n(env->irn, be_pos_Return_val, fld);
set_irn_n(env->irn, be_pos_Return_mem, mproj);
}
return NULL;
}
/**
* This function just sets the register for the Unknown node
* as this is not done during register allocation because Unknown
......@@ -2817,6 +2865,7 @@ void ia32_register_transformers(void) {
/* handle generic backend nodes */
GEN(be_FrameAddr);
GEN(be_Call);
GEN(be_Return);
GEN(be_FrameLoad);
GEN(be_FrameStore);
GEN(be_StackParam);
......
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