+ * INT -> INT
+ * ============
+ * 1) n bit -> m bit n > m (downscale)
+ * a) target is signed: movsx
+ * b) target is unsigned: and with lower bits sets
+ * 2) n bit -> m bit n == m (sign change)
+ * always ignored
+ * 3) n bit -> m bit n < m (upscale)
+ * a) source is signed: movsx
+ * b) source is unsigned: and with lower bits sets
+ *
+ * INT -> FLOAT
+ * ==============
+ * SSE(1/2) convert to float or double (cvtsi2ss/sd)
+ *
+ * FLOAT -> INT
+ * ==============
+ * SSE(1/2) convert from float or double to 32bit int (cvtss/sd2si)
+ * if target mode < 32bit: additional INT -> INT conversion (see above)
+ *
+ * FLOAT -> FLOAT
+ * ================
+ * SSE(1/2) convert from float or double to double or float (cvtss/sd2sd/ss)
+ * x87 is mode_E internally, conversions happen only at load and store
+ * in non-strict semantic
+ */
+
+/**
+ * Create a conversion from x87 state register to general purpose.
+ */
+static ir_node *gen_x87_fp_to_gp(ia32_transform_env_t *env, ir_mode *tgt_mode) {
+ ia32_code_gen_t *cg = env->cg;
+ entity *ent = cg->fp_to_gp;
+ ir_graph *irg = env->irg;
+ ir_node *block = env->block;
+ ir_node *noreg = ia32_new_NoReg_gp(env->cg);
+ ir_node *op = get_Conv_op(env->irn);
+ ir_node *fist, *mem, *load;
+
+ if (! ent) {
+ int size = get_mode_size_bytes(ia32_reg_classes[CLASS_ia32_vfp].mode);
+ ent = cg->fp_to_gp =
+ frame_alloc_area(get_irg_frame_type(env->irg), size, 16, 0);
+ }
+
+ /* do a fist */
+ fist = new_rd_ia32_vfist(env->dbg, irg, block, get_irg_frame(irg), noreg, op, get_irg_no_mem(irg));
+
+ set_ia32_frame_ent(fist, ent);
+ set_ia32_use_frame(fist);
+ set_ia32_am_support(fist, ia32_am_Dest);
+ set_ia32_op_type(fist, ia32_AddrModeD);
+ set_ia32_am_flavour(fist, ia32_B);
+ set_ia32_ls_mode(fist, mode_F);
+
+ mem = new_r_Proj(irg, block, fist, mode_M, pn_ia32_vfist_M);
+
+ /* do a Load */
+ load = new_rd_ia32_Load(env->dbg, irg, block, get_irg_frame(irg), noreg, mem);
+
+ set_ia32_frame_ent(load, ent);
+ set_ia32_use_frame(load);
+ set_ia32_am_support(load, ia32_am_Source);
+ set_ia32_op_type(load, ia32_AddrModeS);
+ set_ia32_am_flavour(load, ia32_B);
+ set_ia32_ls_mode(load, tgt_mode);
+
+ return new_r_Proj(irg, block, load, tgt_mode, pn_ia32_Load_res);
+}
+
+/**
+ * Create a conversion from x87 state register to general purpose.
+ */
+static ir_node *gen_x87_gp_to_fp(ia32_transform_env_t *env, ir_mode *src_mode) {
+ ia32_code_gen_t *cg = env->cg;
+ entity *ent = cg->gp_to_fp;
+ ir_graph *irg = env->irg;
+ ir_node *block = env->block;
+ ir_node *noreg = ia32_new_NoReg_gp(env->cg);
+ ir_node *nomem = get_irg_no_mem(irg);
+ ir_node *op = get_Conv_op(env->irn);
+ ir_node *fild, *store, *mem;
+ int src_bits;
+
+ if (! ent) {
+ int size = get_mode_size_bytes(ia32_reg_classes[CLASS_ia32_gp].mode);
+ ent = cg->gp_to_fp =
+ frame_alloc_area(get_irg_frame_type(env->irg), size, size, 0);
+ }
+
+ /* first convert to 32 bit */
+ src_bits = get_mode_size_bits(src_mode);
+ if (src_bits == 8) {
+ op = new_rd_ia32_Conv_I2I8Bit(env->dbg, irg, block, noreg, noreg, op, nomem);
+ op = new_r_Proj(irg, block, op, mode_Is, 0);
+ }
+ else if (src_bits < 32) {
+ op = new_rd_ia32_Conv_I2I(env->dbg, irg, block, noreg, noreg, op, nomem);
+ op = new_r_Proj(irg, block, op, mode_Is, 0);
+ }
+
+ /* do a store */
+ store = new_rd_ia32_Store(env->dbg, irg, block, get_irg_frame(irg), noreg, op, nomem);
+
+ set_ia32_frame_ent(store, ent);
+ set_ia32_use_frame(store);
+
+ set_ia32_am_support(store, ia32_am_Dest);
+ set_ia32_op_type(store, ia32_AddrModeD);
+ set_ia32_am_flavour(store, ia32_B);
+ set_ia32_ls_mode(store, mode_Is);
+
+ mem = new_r_Proj(irg, block, store, mode_M, 0);
+
+ /* do a fild */
+ fild = new_rd_ia32_vfild(env->dbg, irg, block, get_irg_frame(irg), noreg, mem);
+
+ set_ia32_frame_ent(fild, ent);
+ set_ia32_use_frame(fild);
+ set_ia32_am_support(fild, ia32_am_Source);
+ set_ia32_op_type(fild, ia32_AddrModeS);
+ set_ia32_am_flavour(fild, ia32_B);
+ set_ia32_ls_mode(fild, mode_F);
+
+ return new_r_Proj(irg, block, fild, mode_F, 0);
+}
+
+/**
+ * Transforms a Conv node.
+ *
+ * @param env The transformation environment
+ * @return The created ia32 Conv node
+ */
+static ir_node *gen_Conv(ia32_transform_env_t *env) {
+ dbg_info *dbg = env->dbg;
+ ir_graph *irg = env->irg;
+ ir_node *op = get_Conv_op(env->irn);
+ ir_mode *src_mode = get_irn_mode(op);
+ ir_mode *tgt_mode = env->mode;
+ int src_bits = get_mode_size_bits(src_mode);
+ int tgt_bits = get_mode_size_bits(tgt_mode);
+ int pn = -1;
+ int kill = 0;
+ ir_node *block = env->block;
+ ir_node *new_op = NULL;
+ ir_node *noreg = ia32_new_NoReg_gp(env->cg);
+ ir_node *nomem = new_rd_NoMem(irg);
+ ir_node *proj;
+ DEBUG_ONLY(firm_dbg_module_t *mod = env->mod;)
+
+ if (src_mode == tgt_mode) {
+ /* this can happen when changing mode_P to mode_Is */
+ DB((mod, LEVEL_1, "killed Conv(mode, mode) ..."));
+ edges_reroute(env->irn, op, irg);
+ }
+ else if (mode_is_float(src_mode)) {
+ /* we convert from float ... */
+ if (mode_is_float(tgt_mode)) {
+ /* ... to float */
+ if (USE_SSE2(env->cg)) {
+ DB((mod, LEVEL_1, "create Conv(float, float) ..."));
+ new_op = new_rd_ia32_Conv_FP2FP(dbg, irg, block, noreg, noreg, op, nomem);
+ pn = pn_ia32_Conv_FP2FP_res;
+ }
+ else {
+ DB((mod, LEVEL_1, "killed Conv(float, float) ..."));
+ /*
+ remark: we create a intermediate conv here, so modes will be spread correctly
+ these convs will be killed later
+ */
+ new_op = new_rd_ia32_Conv_FP2FP(dbg, irg, block, noreg, noreg, op, nomem);
+ pn = pn_ia32_Conv_FP2FP_res;
+ kill = 1;
+ }
+ }
+ else {
+ /* ... to int */
+ DB((mod, LEVEL_1, "create Conv(float, int) ..."));
+ if (USE_SSE2(env->cg)) {
+ new_op = new_rd_ia32_Conv_FP2I(dbg, irg, block, noreg, noreg, op, nomem);
+ pn = pn_ia32_Conv_FP2I_res;
+ }
+ else
+ return gen_x87_fp_to_gp(env, tgt_mode);
+
+ /* if target mode is not int: add an additional downscale convert */
+ if (tgt_bits < 32) {
+ SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, env->irn));
+ set_ia32_am_support(new_op, ia32_am_Source);
+ set_ia32_tgt_mode(new_op, tgt_mode);
+ set_ia32_src_mode(new_op, src_mode);
+
+ proj = new_rd_Proj(dbg, irg, block, new_op, mode_Is, pn_ia32_Conv_FP2I_res);
+
+ if (tgt_bits == 8 || src_bits == 8) {
+ new_op = new_rd_ia32_Conv_I2I8Bit(dbg, irg, block, noreg, noreg, proj, nomem);
+ pn = pn_ia32_Conv_I2I8Bit_res;
+ }
+ else {
+ new_op = new_rd_ia32_Conv_I2I(dbg, irg, block, noreg, noreg, proj, nomem);
+ pn = pn_ia32_Conv_I2I_res;
+ }
+ }
+ }
+ }
+ else {
+ /* we convert from int ... */
+ if (mode_is_float(tgt_mode)) {
+ FP_USED(env->cg);
+ /* ... to float */
+ DB((mod, LEVEL_1, "create Conv(int, float) ..."));
+ if (USE_SSE2(env->cg)) {
+ new_op = new_rd_ia32_Conv_I2FP(dbg, irg, block, noreg, noreg, op, nomem);
+ pn = pn_ia32_Conv_I2FP_res;
+ }
+ else
+ return gen_x87_gp_to_fp(env, src_mode);
+ }
+ else {
+ /* ... to int */
+ if (get_mode_size_bits(src_mode) == tgt_bits) {
+ DB((mod, LEVEL_1, "omitting equal size Conv(%+F, %+F) ...", src_mode, tgt_mode));
+ /*
+ remark: we create a intermediate conv here, so modes will be spread correctly
+ these convs will be killed later
+ */
+ new_op = new_rd_ia32_Conv_I2I(dbg, irg, block, noreg, noreg, op, nomem);
+ pn = pn_ia32_Conv_I2I_res;
+ kill = 1;
+ }
+ else {
+ DB((mod, LEVEL_1, "create Conv(int, int) ...", src_mode, tgt_mode));
+ if (tgt_bits == 8 || src_bits == 8) {
+ new_op = new_rd_ia32_Conv_I2I8Bit(dbg, irg, block, noreg, noreg, op, nomem);
+ pn = pn_ia32_Conv_I2I8Bit_res;
+ }
+ else {
+ new_op = new_rd_ia32_Conv_I2I(dbg, irg, block, noreg, noreg, op, nomem);
+ pn = pn_ia32_Conv_I2I_res;
+ }
+ }
+ }
+ }
+
+ if (new_op) {
+ SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, env->irn));
+ set_ia32_tgt_mode(new_op, tgt_mode);
+ set_ia32_src_mode(new_op, src_mode);
+
+ set_ia32_am_support(new_op, ia32_am_Source);
+
+ new_op = new_rd_Proj(dbg, irg, block, new_op, tgt_mode, pn);
+
+ if (kill)
+ nodeset_insert(env->cg->kill_conv, new_op);
+ }
+
+ return new_op;
+}
+
+
+
+/********************************************
+ * _ _
+ * | | | |
+ * | |__ ___ _ __ ___ __| | ___ ___
+ * | '_ \ / _ \ '_ \ / _ \ / _` |/ _ \/ __|
+ * | |_) | __/ | | | (_) | (_| | __/\__ \
+ * |_.__/ \___|_| |_|\___/ \__,_|\___||___/
+ *
+ ********************************************/
+
+ /**
+ * Decides in which block the transformed StackParam should be placed.
+ * If the StackParam has more than one user, the dominator block of
+ * the users will be returned. In case of only one user, this is either
+ * the user block or, in case of a Phi, the predecessor block of the Phi.
+ */
+ static ir_node *get_block_transformed_stack_param(ir_node *irn) {
+ ir_node *dom_bl = NULL;
+
+ if (get_irn_n_edges(irn) == 1) {
+ ir_node *src = get_edge_src_irn(get_irn_out_edge_first(irn));
+
+ if (! is_Phi(src)) {
+ dom_bl = get_nodes_block(src);
+ }
+ else {
+ /* Determine on which in position of the Phi the irn is */
+ /* and get the corresponding cfg predecessor block. */
+
+ int i = get_irn_pred_pos(src, irn);
+ assert(i >= 0 && "kaputt");
+ dom_bl = get_Block_cfgpred_block(get_nodes_block(src), i);
+ }
+ }
+ else {
+ dom_bl = node_users_smallest_common_dominator(irn, 1);
+ }
+
+ assert(dom_bl && "dominator block not found");
+
+ return dom_bl;
+ }
+
+static ir_node *gen_be_StackParam(ia32_transform_env_t *env) {
+ ir_node *new_op = NULL;
+ ir_node *node = env->irn;
+ ir_node *noreg = ia32_new_NoReg_gp(env->cg);
+ ir_node *mem = new_rd_NoMem(env->irg);
+ ir_node *ptr = get_irn_n(node, 0);
+ entity *ent = arch_get_frame_entity(env->cg->arch_env, node);
+ ir_mode *mode = env->mode;
+
+ /* choose the block where to place the load */
+ env->block = get_block_transformed_stack_param(node);
+
+ if (mode_is_float(mode)) {
+ FP_USED(env->cg);
+ if (USE_SSE2(env->cg))
+ new_op = new_rd_ia32_xLoad(env->dbg, env->irg, env->block, ptr, noreg, mem);
+ else
+ new_op = new_rd_ia32_vfld(env->dbg, env->irg, env->block, ptr, noreg, mem);
+ }
+ else {
+ new_op = new_rd_ia32_Load(env->dbg, env->irg, env->block, ptr, noreg, mem);
+ }
+
+ set_ia32_frame_ent(new_op, ent);
+ set_ia32_use_frame(new_op);
+
+ set_ia32_am_support(new_op, ia32_am_Source);
+ set_ia32_op_type(new_op, ia32_AddrModeS);
+ set_ia32_am_flavour(new_op, ia32_B);
+ set_ia32_ls_mode(new_op, mode);
+ set_ia32_flags(new_op, get_ia32_flags(new_op) | arch_irn_flags_rematerializable);
+
+ SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, env->irn));
+
+ return new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode, pn_ia32_Load_res);
+}
+
+/**
+ * Transforms a FrameAddr into an ia32 Add.
+ */
+static ir_node *gen_be_FrameAddr(ia32_transform_env_t *env) {
+ ir_node *new_op = NULL;
+ ir_node *node = env->irn;
+ ir_node *op = get_irn_n(node, 0);
+ ir_node *noreg = ia32_new_NoReg_gp(env->cg);
+ ir_node *nomem = new_rd_NoMem(env->irg);
+
+ new_op = new_rd_ia32_Add(env->dbg, env->irg, env->block, noreg, noreg, op, noreg, nomem);
+ set_ia32_frame_ent(new_op, arch_get_frame_entity(env->cg->arch_env, node));
+ set_ia32_am_support(new_op, ia32_am_Full);
+ set_ia32_use_frame(new_op);
+ set_ia32_immop_type(new_op, ia32_ImmConst);
+ set_ia32_commutative(new_op);
+
+ SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, env->irn));
+
+ return new_rd_Proj(env->dbg, env->irg, env->block, new_op, env->mode, pn_ia32_Add_res);
+}
+
+/**
+ * Transforms a FrameLoad into an ia32 Load.
+ */
+static ir_node *gen_be_FrameLoad(ia32_transform_env_t *env) {
+ ir_node *new_op = NULL;
+ ir_node *node = env->irn;
+ ir_node *noreg = ia32_new_NoReg_gp(env->cg);
+ ir_node *mem = get_irn_n(node, 0);
+ ir_node *ptr = get_irn_n(node, 1);
+ entity *ent = arch_get_frame_entity(env->cg->arch_env, node);
+ ir_mode *mode = get_type_mode(get_entity_type(ent));
+
+ if (mode_is_float(mode)) {
+ FP_USED(env->cg);
+ if (USE_SSE2(env->cg))
+ new_op = new_rd_ia32_xLoad(env->dbg, env->irg, env->block, ptr, noreg, mem);
+ else
+ new_op = new_rd_ia32_vfld(env->dbg, env->irg, env->block, ptr, noreg, mem);
+ }
+ else
+ new_op = new_rd_ia32_Load(env->dbg, env->irg, env->block, ptr, noreg, mem);
+
+ set_ia32_frame_ent(new_op, ent);
+ set_ia32_use_frame(new_op);
+
+ set_ia32_am_support(new_op, ia32_am_Source);
+ set_ia32_op_type(new_op, ia32_AddrModeS);
+ set_ia32_am_flavour(new_op, ia32_B);
+ set_ia32_ls_mode(new_op, mode);
+
+ SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, env->irn));
+
+ return new_op;
+}
+
+
+/**
+ * Transforms a FrameStore into an ia32 Store.
+ */
+static ir_node *gen_be_FrameStore(ia32_transform_env_t *env) {
+ ir_node *new_op = NULL;
+ ir_node *node = env->irn;
+ ir_node *noreg = ia32_new_NoReg_gp(env->cg);
+ ir_node *mem = get_irn_n(node, 0);
+ ir_node *ptr = get_irn_n(node, 1);
+ ir_node *val = get_irn_n(node, 2);
+ entity *ent = arch_get_frame_entity(env->cg->arch_env, node);
+ ir_mode *mode = get_irn_mode(val);
+
+ if (mode_is_float(mode)) {
+ FP_USED(env->cg);
+ if (USE_SSE2(env->cg))
+ new_op = new_rd_ia32_xStore(env->dbg, env->irg, env->block, ptr, noreg, val, mem);
+ else
+ new_op = new_rd_ia32_vfst(env->dbg, env->irg, env->block, ptr, noreg, val, mem);
+ }
+ else if (get_mode_size_bits(mode) == 8) {
+ new_op = new_rd_ia32_Store8Bit(env->dbg, env->irg, env->block, ptr, noreg, val, mem);
+ }
+ else {
+ new_op = new_rd_ia32_Store(env->dbg, env->irg, env->block, ptr, noreg, val, mem);
+ }
+
+ set_ia32_frame_ent(new_op, ent);
+ set_ia32_use_frame(new_op);
+
+ set_ia32_am_support(new_op, ia32_am_Dest);
+ set_ia32_op_type(new_op, ia32_AddrModeD);
+ set_ia32_am_flavour(new_op, ia32_B);
+ set_ia32_ls_mode(new_op, mode);
+
+ SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, env->irn));
+
+ return new_op;
+}
+
+/**
+ * In case SSE is used we need to copy the result from FPU TOS.