mirror of
https://github.com/Motorhead1991/qemu.git
synced 2025-09-09 00:07:57 -06:00
5b80dcf95b
While Bochs's algorithms are pretty solid, there are small opportunities to improve them or to make their logic more similar to TCG's handling of condition codes. - use a single bit for the difference between bits 0..7 of result and PF. This is useful because "set only ZF" is not a common case. - place SD in the same place as SF - move CF and PO at bits 62 and 63 when target_ulong is 64-bits wide, so that 64-bit ALU operations need fewer shifts - use rotates to move CF and AF from auxbits to their eflags position Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
71 lines
3 KiB
C
71 lines
3 KiB
C
/////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (C) 2001-2012 The Bochs Project
|
|
// Copyright (C) 2017 Google Inc.
|
|
//
|
|
// 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 2.1 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, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA
|
|
/////////////////////////////////////////////////////////////////////////
|
|
/*
|
|
* x86 eflags functions
|
|
*/
|
|
|
|
#ifndef X86_EMU_FLAGS_H
|
|
#define X86_EMU_FLAGS_H
|
|
|
|
#include "cpu.h"
|
|
void lflags_to_rflags(CPUX86State *env);
|
|
void rflags_to_lflags(CPUX86State *env);
|
|
|
|
bool get_CF(CPUX86State *env);
|
|
void set_CF(CPUX86State *env, bool val);
|
|
|
|
void SET_FLAGS_OxxxxC(CPUX86State *env, bool new_of, bool new_cf);
|
|
|
|
void SET_FLAGS_OSZAPC_SUB32(CPUX86State *env, uint32_t v1, uint32_t v2,
|
|
uint32_t diff);
|
|
void SET_FLAGS_OSZAPC_SUB16(CPUX86State *env, uint16_t v1, uint16_t v2,
|
|
uint16_t diff);
|
|
void SET_FLAGS_OSZAPC_SUB8(CPUX86State *env, uint8_t v1, uint8_t v2,
|
|
uint8_t diff);
|
|
|
|
void SET_FLAGS_OSZAPC_ADD32(CPUX86State *env, uint32_t v1, uint32_t v2,
|
|
uint32_t diff);
|
|
void SET_FLAGS_OSZAPC_ADD16(CPUX86State *env, uint16_t v1, uint16_t v2,
|
|
uint16_t diff);
|
|
void SET_FLAGS_OSZAPC_ADD8(CPUX86State *env, uint8_t v1, uint8_t v2,
|
|
uint8_t diff);
|
|
|
|
void SET_FLAGS_OSZAP_SUB32(CPUX86State *env, uint32_t v1, uint32_t v2,
|
|
uint32_t diff);
|
|
void SET_FLAGS_OSZAP_SUB16(CPUX86State *env, uint16_t v1, uint16_t v2,
|
|
uint16_t diff);
|
|
void SET_FLAGS_OSZAP_SUB8(CPUX86State *env, uint8_t v1, uint8_t v2,
|
|
uint8_t diff);
|
|
|
|
void SET_FLAGS_OSZAP_ADD32(CPUX86State *env, uint32_t v1, uint32_t v2,
|
|
uint32_t diff);
|
|
void SET_FLAGS_OSZAP_ADD16(CPUX86State *env, uint16_t v1, uint16_t v2,
|
|
uint16_t diff);
|
|
void SET_FLAGS_OSZAP_ADD8(CPUX86State *env, uint8_t v1, uint8_t v2,
|
|
uint8_t diff);
|
|
|
|
void SET_FLAGS_OSZAPC_LOGIC32(CPUX86State *env, uint32_t v1, uint32_t v2,
|
|
uint32_t diff);
|
|
void SET_FLAGS_OSZAPC_LOGIC16(CPUX86State *env, uint16_t v1, uint16_t v2,
|
|
uint16_t diff);
|
|
void SET_FLAGS_OSZAPC_LOGIC8(CPUX86State *env, uint8_t v1, uint8_t v2,
|
|
uint8_t diff);
|
|
|
|
#endif /* X86_EMU_FLAGS_H */
|