return env;
}
-static char *ia32_get_reg_name_for_mode(ia32_emit_env_t *env, ir_mode *mode, const arch_register_t *reg) {
+static const char *ia32_get_reg_name_for_mode(ia32_emit_env_t *env, ir_mode *mode, const arch_register_t *reg) {
switch(get_mode_size_bits(mode)) {
case 8:
return ia32_get_mapped_reg_name(env->isa->regs_8bit, reg);
is_ia32_Store8Bit(n) || \
is_ia32_CondJmp(n) || \
is_ia32_xCondJmp(n) || \
+ is_ia32_CmpSet(n) || \
+ is_ia32_xCmpSet(n) || \
is_ia32_SwitchJmp(n)))
if (! buf) {
snprintf(cmd_buf, SNPRINTF_BUF_LEN, "%s %s", instr, reg);
lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
IA32_DO_EMIT(irn);
-// lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "fnstsw %3D", irn);
lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "fnstsw %%ax", irn);
snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* Store x87 FPU Control Word */");
IA32_DO_EMIT(irn);
finish_CondJmp(F, irn, mode_Is);
}
-static void emit_ia32_CMov(ir_node *irn, ia32_emit_env_t *env) {
+static void CMov_emitter(ir_node *irn, ia32_emit_env_t *env) {
FILE *F = env->out;
const lc_arg_env_t *arg_env = ia32_get_arg_env();
- char *cmp_suffix = get_cmp_suffix(get_ia32_pncode(irn), ! mode_is_signed(get_irn_mode(get_irn_n(irn, 0))));
+ const char *cmp_suffix = get_cmp_suffix(get_ia32_pncode(irn), ! mode_is_signed(get_irn_mode(get_irn_n(irn, 0))));
char cmd_buf[SNPRINTF_BUF_LEN];
char cmnt_buf[SNPRINTF_BUF_LEN];
in1 = arch_get_irn_register(env->arch_env, get_irn_n(irn, 2));
in2 = arch_get_irn_register(env->arch_env, get_irn_n(irn, 3));
+ /* we have to emit the cmp first, because the destination register */
+ /* could be one of the compare registers */
+ if (is_ia32_CmpCMov(irn)) {
+ lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmp %1S, %2S", irn, irn);
+ }
+ else if (is_ia32_xCmpCMov(irn)) {
+ lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "ucomis%M %1S, %2S", get_irn_n(irn, 0), irn, irn);
+ }
+ else {
+ assert(0 && "unsupported CMov");
+ }
+ lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* Psi condition */" );
+ IA32_DO_EMIT(irn);
+
if (REGS_ARE_EQUAL(out, in2)) {
/* best case: default in == out -> do nothing */
}
IA32_DO_EMIT(irn);
}
- lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmp %1S, %2S", irn, irn);
- lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* Psi condition */" );
- IA32_DO_EMIT(irn);
-
lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmov%s %1D, %3S", cmp_suffix, irn, irn);
lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* condition is true case */" );
IA32_DO_EMIT(irn);
}
+static void emit_ia32_CmpCMov(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, ia32_emit_env_t *env) {
+ FILE *F = env->out;
+ const lc_arg_env_t *arg_env = ia32_get_arg_env();
+ const char *cmp_suffix = get_cmp_suffix(get_ia32_pncode(irn), ! mode_is_signed(get_irn_mode(get_irn_n(irn, 0))));
+ const char *instr = "xor";
+ 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 (env->isa->opt_arch == arch_pentium_4) {
+ /* P4 prefers sub r, r, others xor r, r */
+ instr = "sub";
+ }
+
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, "%s %%%s, %%%s", instr, arch_register_get_name(out), arch_register_get_name(out));
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* clear target as set modifies only lower 8 bit */");
+ IA32_DO_EMIT(irn);
+
+ 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, 0), ia32_emit_binop(irn, env));
+ }
+ else {
+ assert(0 && "unsupported Set");
+ }
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* calculate Psi condition */" );
+ 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, env);
+}
+
+static void emit_ia32_xCmpSet(ir_node *irn, ia32_emit_env_t *env) {
+ Set_emitter(irn, 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;
+ char cmd_buf[SNPRINTF_BUF_LEN];
+ char cmnt_buf[SNPRINTF_BUF_LEN];
+
+ switch (get_ia32_pncode(irn)) {
+ case pn_Cmp_Leg: /* odered */
+ sse_pnc = 7;
+ break;
+ case pn_Cmp_Uo: /* unordered */
+ sse_pnc = 3;
+ break;
+ case pn_Cmp_Ue: /* == */
+ sse_pnc = 0;
+ break;
+ case pn_Cmp_Ul: /* < */
+ sse_pnc = 1;
+ break;
+ case pn_Cmp_Ule: /* <= */
+ sse_pnc = 2;
+ break;
+ case pn_Cmp_Ug: /* > */
+ sse_pnc = 6;
+ break;
+ case pn_Cmp_Uge: /* >= */
+ sse_pnc = 5;
+ break;
+ case pn_Cmp_Ne: /* != */
+ sse_pnc = 4;
+ break;
+ }
+
+ assert(sse_pnc >= 0 && "unsupported floating point compare");
+
+ lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmps%M %s, %d", irn, ia32_emit_binop(irn, env), sse_pnc);
+ lc_esnprintf(arg_env, cmnt_buf, SNPRINTF_BUF_LEN, "/* SSE compare with result in %1D */", irn);
+ IA32_DO_EMIT(irn);
+}
+
/*********************************************************
* _ _ _
* (_) | (_)
IA32_EMIT(TestJmp);
IA32_EMIT(CJmp);
IA32_EMIT(CJmpAM);
- IA32_EMIT(CMov);
+ IA32_EMIT(CmpCMov);
+ IA32_EMIT(CmpSet);
IA32_EMIT(SwitchJmp);
IA32_EMIT(CopyB);
IA32_EMIT(CopyB_i);
IA32_EMIT(Conv_I2I);
IA32_EMIT(Conv_I2I8Bit);
IA32_EMIT(Const);
+ IA32_EMIT(xCmp);
+ IA32_EMIT(xCmpSet);
+ IA32_EMIT(xCmpCMov);
IA32_EMIT2(fcomJmp, x87CondJmp);
IA32_EMIT2(fcompJmp, x87CondJmp);
IA32_EMIT2(fcomppJmp, x87CondJmp);
projects / libfirm / blobdiff