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-rw-r--r--target-i386/cc_helper.c394
1 files changed, 394 insertions, 0 deletions
diff --git a/target-i386/cc_helper.c b/target-i386/cc_helper.c
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+++ b/target-i386/cc_helper.c
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+/*
+ * x86 condition code helpers
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cpu.h"
+#include "exec/helper-proto.h"
+
+const uint8_t parity_table[256] = {
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+};
+
+#define SHIFT 0
+#include "cc_helper_template.h"
+#undef SHIFT
+
+#define SHIFT 1
+#include "cc_helper_template.h"
+#undef SHIFT
+
+#define SHIFT 2
+#include "cc_helper_template.h"
+#undef SHIFT
+
+#ifdef TARGET_X86_64
+
+#define SHIFT 3
+#include "cc_helper_template.h"
+#undef SHIFT
+
+#endif
+
+static target_ulong compute_all_adcx(target_ulong dst, target_ulong src1,
+ target_ulong src2)
+{
+ return (src1 & ~CC_C) | (dst * CC_C);
+}
+
+static target_ulong compute_all_adox(target_ulong dst, target_ulong src1,
+ target_ulong src2)
+{
+ return (src1 & ~CC_O) | (src2 * CC_O);
+}
+
+static target_ulong compute_all_adcox(target_ulong dst, target_ulong src1,
+ target_ulong src2)
+{
+ return (src1 & ~(CC_C | CC_O)) | (dst * CC_C) | (src2 * CC_O);
+}
+
+target_ulong helper_cc_compute_all(target_ulong dst, target_ulong src1,
+ target_ulong src2, int op)
+{
+ switch (op) {
+ default: /* should never happen */
+ return 0;
+
+ case CC_OP_EFLAGS:
+ return src1;
+ case CC_OP_CLR:
+ return CC_Z | CC_P;
+
+ case CC_OP_MULB:
+ return compute_all_mulb(dst, src1);
+ case CC_OP_MULW:
+ return compute_all_mulw(dst, src1);
+ case CC_OP_MULL:
+ return compute_all_mull(dst, src1);
+
+ case CC_OP_ADDB:
+ return compute_all_addb(dst, src1);
+ case CC_OP_ADDW:
+ return compute_all_addw(dst, src1);
+ case CC_OP_ADDL:
+ return compute_all_addl(dst, src1);
+
+ case CC_OP_ADCB:
+ return compute_all_adcb(dst, src1, src2);
+ case CC_OP_ADCW:
+ return compute_all_adcw(dst, src1, src2);
+ case CC_OP_ADCL:
+ return compute_all_adcl(dst, src1, src2);
+
+ case CC_OP_SUBB:
+ return compute_all_subb(dst, src1);
+ case CC_OP_SUBW:
+ return compute_all_subw(dst, src1);
+ case CC_OP_SUBL:
+ return compute_all_subl(dst, src1);
+
+ case CC_OP_SBBB:
+ return compute_all_sbbb(dst, src1, src2);
+ case CC_OP_SBBW:
+ return compute_all_sbbw(dst, src1, src2);
+ case CC_OP_SBBL:
+ return compute_all_sbbl(dst, src1, src2);
+
+ case CC_OP_LOGICB:
+ return compute_all_logicb(dst, src1);
+ case CC_OP_LOGICW:
+ return compute_all_logicw(dst, src1);
+ case CC_OP_LOGICL:
+ return compute_all_logicl(dst, src1);
+
+ case CC_OP_INCB:
+ return compute_all_incb(dst, src1);
+ case CC_OP_INCW:
+ return compute_all_incw(dst, src1);
+ case CC_OP_INCL:
+ return compute_all_incl(dst, src1);
+
+ case CC_OP_DECB:
+ return compute_all_decb(dst, src1);
+ case CC_OP_DECW:
+ return compute_all_decw(dst, src1);
+ case CC_OP_DECL:
+ return compute_all_decl(dst, src1);
+
+ case CC_OP_SHLB:
+ return compute_all_shlb(dst, src1);
+ case CC_OP_SHLW:
+ return compute_all_shlw(dst, src1);
+ case CC_OP_SHLL:
+ return compute_all_shll(dst, src1);
+
+ case CC_OP_SARB:
+ return compute_all_sarb(dst, src1);
+ case CC_OP_SARW:
+ return compute_all_sarw(dst, src1);
+ case CC_OP_SARL:
+ return compute_all_sarl(dst, src1);
+
+ case CC_OP_BMILGB:
+ return compute_all_bmilgb(dst, src1);
+ case CC_OP_BMILGW:
+ return compute_all_bmilgw(dst, src1);
+ case CC_OP_BMILGL:
+ return compute_all_bmilgl(dst, src1);
+
+ case CC_OP_ADCX:
+ return compute_all_adcx(dst, src1, src2);
+ case CC_OP_ADOX:
+ return compute_all_adox(dst, src1, src2);
+ case CC_OP_ADCOX:
+ return compute_all_adcox(dst, src1, src2);
+
+#ifdef TARGET_X86_64
+ case CC_OP_MULQ:
+ return compute_all_mulq(dst, src1);
+ case CC_OP_ADDQ:
+ return compute_all_addq(dst, src1);
+ case CC_OP_ADCQ:
+ return compute_all_adcq(dst, src1, src2);
+ case CC_OP_SUBQ:
+ return compute_all_subq(dst, src1);
+ case CC_OP_SBBQ:
+ return compute_all_sbbq(dst, src1, src2);
+ case CC_OP_LOGICQ:
+ return compute_all_logicq(dst, src1);
+ case CC_OP_INCQ:
+ return compute_all_incq(dst, src1);
+ case CC_OP_DECQ:
+ return compute_all_decq(dst, src1);
+ case CC_OP_SHLQ:
+ return compute_all_shlq(dst, src1);
+ case CC_OP_SARQ:
+ return compute_all_sarq(dst, src1);
+ case CC_OP_BMILGQ:
+ return compute_all_bmilgq(dst, src1);
+#endif
+ }
+}
+
+uint32_t cpu_cc_compute_all(CPUX86State *env, int op)
+{
+ return helper_cc_compute_all(CC_DST, CC_SRC, CC_SRC2, op);
+}
+
+target_ulong helper_cc_compute_c(target_ulong dst, target_ulong src1,
+ target_ulong src2, int op)
+{
+ switch (op) {
+ default: /* should never happen */
+ case CC_OP_LOGICB:
+ case CC_OP_LOGICW:
+ case CC_OP_LOGICL:
+ case CC_OP_LOGICQ:
+ case CC_OP_CLR:
+ return 0;
+
+ case CC_OP_EFLAGS:
+ case CC_OP_SARB:
+ case CC_OP_SARW:
+ case CC_OP_SARL:
+ case CC_OP_SARQ:
+ case CC_OP_ADOX:
+ return src1 & 1;
+
+ case CC_OP_INCB:
+ case CC_OP_INCW:
+ case CC_OP_INCL:
+ case CC_OP_INCQ:
+ case CC_OP_DECB:
+ case CC_OP_DECW:
+ case CC_OP_DECL:
+ case CC_OP_DECQ:
+ return src1;
+
+ case CC_OP_MULB:
+ case CC_OP_MULW:
+ case CC_OP_MULL:
+ case CC_OP_MULQ:
+ return src1 != 0;
+
+ case CC_OP_ADCX:
+ case CC_OP_ADCOX:
+ return dst;
+
+ case CC_OP_ADDB:
+ return compute_c_addb(dst, src1);
+ case CC_OP_ADDW:
+ return compute_c_addw(dst, src1);
+ case CC_OP_ADDL:
+ return compute_c_addl(dst, src1);
+
+ case CC_OP_ADCB:
+ return compute_c_adcb(dst, src1, src2);
+ case CC_OP_ADCW:
+ return compute_c_adcw(dst, src1, src2);
+ case CC_OP_ADCL:
+ return compute_c_adcl(dst, src1, src2);
+
+ case CC_OP_SUBB:
+ return compute_c_subb(dst, src1);
+ case CC_OP_SUBW:
+ return compute_c_subw(dst, src1);
+ case CC_OP_SUBL:
+ return compute_c_subl(dst, src1);
+
+ case CC_OP_SBBB:
+ return compute_c_sbbb(dst, src1, src2);
+ case CC_OP_SBBW:
+ return compute_c_sbbw(dst, src1, src2);
+ case CC_OP_SBBL:
+ return compute_c_sbbl(dst, src1, src2);
+
+ case CC_OP_SHLB:
+ return compute_c_shlb(dst, src1);
+ case CC_OP_SHLW:
+ return compute_c_shlw(dst, src1);
+ case CC_OP_SHLL:
+ return compute_c_shll(dst, src1);
+
+ case CC_OP_BMILGB:
+ return compute_c_bmilgb(dst, src1);
+ case CC_OP_BMILGW:
+ return compute_c_bmilgw(dst, src1);
+ case CC_OP_BMILGL:
+ return compute_c_bmilgl(dst, src1);
+
+#ifdef TARGET_X86_64
+ case CC_OP_ADDQ:
+ return compute_c_addq(dst, src1);
+ case CC_OP_ADCQ:
+ return compute_c_adcq(dst, src1, src2);
+ case CC_OP_SUBQ:
+ return compute_c_subq(dst, src1);
+ case CC_OP_SBBQ:
+ return compute_c_sbbq(dst, src1, src2);
+ case CC_OP_SHLQ:
+ return compute_c_shlq(dst, src1);
+ case CC_OP_BMILGQ:
+ return compute_c_bmilgq(dst, src1);
+#endif
+ }
+}
+
+void helper_write_eflags(CPUX86State *env, target_ulong t0,
+ uint32_t update_mask)
+{
+ cpu_load_eflags(env, t0, update_mask);
+}
+
+target_ulong helper_read_eflags(CPUX86State *env)
+{
+ uint32_t eflags;
+
+ eflags = cpu_cc_compute_all(env, CC_OP);
+ eflags |= (env->df & DF_MASK);
+ eflags |= env->eflags & ~(VM_MASK | RF_MASK);
+ return eflags;
+}
+
+void helper_clts(CPUX86State *env)
+{
+ env->cr[0] &= ~CR0_TS_MASK;
+ env->hflags &= ~HF_TS_MASK;
+}
+
+void helper_reset_rf(CPUX86State *env)
+{
+ env->eflags &= ~RF_MASK;
+}
+
+void helper_cli(CPUX86State *env)
+{
+ env->eflags &= ~IF_MASK;
+}
+
+void helper_sti(CPUX86State *env)
+{
+ env->eflags |= IF_MASK;
+}
+
+void helper_clac(CPUX86State *env)
+{
+ env->eflags &= ~AC_MASK;
+}
+
+void helper_stac(CPUX86State *env)
+{
+ env->eflags |= AC_MASK;
+}
+
+#if 0
+/* vm86plus instructions */
+void helper_cli_vm(CPUX86State *env)
+{
+ env->eflags &= ~VIF_MASK;
+}
+
+void helper_sti_vm(CPUX86State *env)
+{
+ env->eflags |= VIF_MASK;
+ if (env->eflags & VIP_MASK) {
+ raise_exception(env, EXCP0D_GPF);
+ }
+}
+#endif
+
+void helper_set_inhibit_irq(CPUX86State *env)
+{
+ env->hflags |= HF_INHIBIT_IRQ_MASK;
+}
+
+void helper_reset_inhibit_irq(CPUX86State *env)
+{
+ env->hflags &= ~HF_INHIBIT_IRQ_MASK;
+}
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