+static void emit_ia32_CmpCMov(ir_node *irn, ia32_emit_env_t *env) {
+ CMov_emitter(irn, env);
+}
+
+static void emit_ia32_PsiCondCMov(ir_node *irn, ia32_emit_env_t *env) {
+ CMov_emitter(irn, env);
+}
+
+static void emit_ia32_xCmpCMov(ir_node *irn, ia32_emit_env_t *env) {
+ CMov_emitter(irn, env);
+}
+
+static void Set_emitter(ir_node *irn, ir_mode *mode, ia32_emit_env_t *env) {
+ FILE *F = env->out;
+ const lc_arg_env_t *arg_env = ia32_get_arg_env();
+ int is_unsigned = mode_is_float(mode) || ! mode_is_signed(mode);
+ const char *cmp_suffix = get_cmp_suffix(get_ia32_pncode(irn), is_unsigned);
+ const char *reg8bit;
+
+ char cmd_buf[SNPRINTF_BUF_LEN];
+ char cmnt_buf[SNPRINTF_BUF_LEN];
+ const arch_register_t *out;
+
+ out = arch_get_irn_register(env->arch_env, irn);
+ reg8bit = ia32_get_mapped_reg_name(env->isa->regs_8bit, out);
+
+ if (is_ia32_CmpSet(irn)) {
+ lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
+ }
+ else if (is_ia32_xCmpSet(irn)) {
+ lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "ucomis%M %s", get_irn_n(irn, 2), ia32_emit_binop(irn, env));
+ }
+ else if (is_ia32_PsiCondSet(irn)) {
+ /* omit compare because flags are already set by And/Or */
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
+ }
+ else {
+ assert(0 && "unsupported Set");
+ }
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* calculate Psi condition */" );
+ IA32_DO_EMIT(irn);
+
+ /* use mov to clear target because it doesn't affect the eflags */
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, "mov %%%s, 0", arch_register_get_name(out));
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* clear target as set modifies only lower 8 bit */");
+ IA32_DO_EMIT(irn);
+
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, "set%s %%%s", cmp_suffix, reg8bit);
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* set 1 iff true, 0 otherweise */" );
+ IA32_DO_EMIT(irn);
+}
+
+static void emit_ia32_CmpSet(ir_node *irn, ia32_emit_env_t *env) {
+ Set_emitter(irn, get_irn_mode(get_irn_n(irn, 2)), env);
+}
+
+static void emit_ia32_PsiCondSet(ir_node *irn, ia32_emit_env_t *env) {
+ Set_emitter(irn, get_irn_mode(get_irn_n(irn, 0)), env);
+}
+
+static void emit_ia32_xCmpSet(ir_node *irn, ia32_emit_env_t *env) {
+ Set_emitter(irn, get_irn_mode(get_irn_n(irn, 2)), env);
+}
+
+static void emit_ia32_xCmp(ir_node *irn, ia32_emit_env_t *env) {
+ FILE *F = env->out;
+ const lc_arg_env_t *arg_env = ia32_get_arg_env();
+ int sse_pnc = -1;
+ long pnc = get_ia32_pncode(irn);
+ long unord = pnc & pn_Cmp_Uo;
+ char cmd_buf[SNPRINTF_BUF_LEN];
+ char cmnt_buf[SNPRINTF_BUF_LEN];
+
+ switch (pnc) {
+ case pn_Cmp_Leg: /* odered */
+ sse_pnc = 7;
+ break;
+ case pn_Cmp_Uo: /* unordered */
+ sse_pnc = 3;
+ break;
+ case pn_Cmp_Ue:
+ case pn_Cmp_Eq: /* == */
+ sse_pnc = 0;
+ break;
+ case pn_Cmp_Ul:
+ case pn_Cmp_Lt: /* < */
+ sse_pnc = 1;
+ break;
+ case pn_Cmp_Ule:
+ case pn_Cmp_Le: /* <= */
+ sse_pnc = 2;
+ break;
+ case pn_Cmp_Ug:
+ case pn_Cmp_Gt: /* > */
+ sse_pnc = 6;
+ break;
+ case pn_Cmp_Uge:
+ case pn_Cmp_Ge: /* >= */
+ sse_pnc = 5;
+ break;
+ case pn_Cmp_Ne:
+ case pn_Cmp_Lg: /* != */
+ sse_pnc = 4;
+ break;
+ }
+
+ assert(sse_pnc >= 0 && "unsupported compare");
+
+ if (unord && sse_pnc != 3) {
+ /*
+ We need a separate compare against unordered.
+ Quick and Dirty solution:
+ - get some memory on stack
+ - compare
+ - store result
+ - compare
+ - and result and stored result
+ - cleanup stack
+ */
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, "sub %%esp, 8");
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* reserve some space for unordered compare result */");
+ IA32_DO_EMIT(NULL);
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmpsd %s, 3", ia32_emit_binop(irn, env));
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* SSE compare: unordered */");
+ IA32_DO_EMIT(NULL);
+ lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "movsd [%%esp], %1D", irn);
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* store compare result */");
+ IA32_DO_EMIT(NULL);
+ }
+
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, "cmpsd %s, %d", ia32_emit_binop(irn, env), sse_pnc);
+ lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* SSE compare (%+F) with result in %1D */", irn, irn);
+ IA32_DO_EMIT(irn);
+
+ if (unord && sse_pnc != 3) {
+ lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "andpd %1D, [%%esp]", irn);
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* build the final result */");
+ IA32_DO_EMIT(NULL);
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, "add %%esp, 8");
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* free allocated space */");
+ IA32_DO_EMIT(NULL);
+ }
+}
+