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i386: separate fpu_helper sysemu-only parts

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create a separate tcg/sysemu/fpu_helper.c for the sysemu-only parts.

For user mode, some small #ifdefs remain in tcg/fpu_helper.c
which do not seem worth splitting into their own user-mode module.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210322132800.7470-16-cfontana@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Claudio Fontana 2021-03-22 14:27:51 +01:00 committed by Paolo Bonzini
parent a4b1f4e611
commit 83a3d9c740
4 changed files with 63 additions and 39 deletions
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3
target/i386/cpu.h
View file

@ -1817,7 +1817,10 @@ int cpu_x86_support_mca_broadcast(CPUX86State *env);
int cpu_get_pic_interrupt(CPUX86State *s);
/* MSDOS compatibility mode FPU exception support */
void x86_register_ferr_irq(qemu_irq irq);
void fpu_check_raise_ferr_irq(CPUX86State *s);
void cpu_set_ignne(void);
void cpu_clear_ignne(void);
/* mpx_helper.c */
void cpu_sync_bndcs_hflags(CPUX86State *env);

41
target/i386/tcg/fpu_helper.c
View file

@ -21,17 +21,10 @@
#include <math.h>
#include "cpu.h"
#include "exec/helper-proto.h"
#include "qemu/host-utils.h"
#include "exec/exec-all.h"
#include "exec/cpu_ldst.h"
#include "fpu/softfloat.h"
#include "fpu/softfloat-macros.h"
#include "helper-tcg.h"
#ifdef CONFIG_SOFTMMU
#include "hw/irq.h"
#endif
/* float macros */
#define FT0 (env->ft0)
#define ST0 (env->fpregs[env->fpstt].d)
@ -75,36 +68,6 @@
#define floatx80_ln2_d make_floatx80(0x3ffe, 0xb17217f7d1cf79abLL)
#define floatx80_pi_d make_floatx80(0x4000, 0xc90fdaa22168c234LL)
#if !defined(CONFIG_USER_ONLY)
static qemu_irq ferr_irq;
void x86_register_ferr_irq(qemu_irq irq)
{
ferr_irq = irq;
}
static void cpu_clear_ignne(void)
{
CPUX86State *env = &X86_CPU(first_cpu)->env;
env->hflags2 &= ~HF2_IGNNE_MASK;
}
void cpu_set_ignne(void)
{
CPUX86State *env = &X86_CPU(first_cpu)->env;
env->hflags2 |= HF2_IGNNE_MASK;
/*
* We get here in response to a write to port F0h. The chipset should
* deassert FP_IRQ and FERR# instead should stay signaled until FPSW_SE is
* cleared, because FERR# and FP_IRQ are two separate pins on real
* hardware. However, we don't model FERR# as a qemu_irq, so we just
* do directly what the chipset would do, i.e. deassert FP_IRQ.
*/
qemu_irq_lower(ferr_irq);
}
#endif
static inline void fpush(CPUX86State *env)
{
env->fpstt = (env->fpstt - 1) & 7;
@ -202,8 +165,8 @@ static void fpu_raise_exception(CPUX86State *env, uintptr_t retaddr)
raise_exception_ra(env, EXCP10_COPR, retaddr);
}
#if !defined(CONFIG_USER_ONLY)
else if (ferr_irq && !(env->hflags2 & HF2_IGNNE_MASK)) {
qemu_irq_raise(ferr_irq);
else {
fpu_check_raise_ferr_irq(env);
}
#endif
}

57
target/i386/tcg/sysemu/fpu_helper.c Normal file
View file

@ -0,0 +1,57 @@
/*
* x86 FPU, MMX/3DNow!/SSE/SSE2/SSE3/SSSE3/SSE4/PNI helpers (sysemu code)
*
* 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 2.1 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, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "hw/irq.h"
static qemu_irq ferr_irq;
void x86_register_ferr_irq(qemu_irq irq)
{
ferr_irq = irq;
}
void fpu_check_raise_ferr_irq(CPUX86State *env)
{
if (ferr_irq && !(env->hflags2 & HF2_IGNNE_MASK)) {
qemu_irq_raise(ferr_irq);
return;
}
}
void cpu_clear_ignne(void)
{
CPUX86State *env = &X86_CPU(first_cpu)->env;
env->hflags2 &= ~HF2_IGNNE_MASK;
}
void cpu_set_ignne(void)
{
CPUX86State *env = &X86_CPU(first_cpu)->env;
env->hflags2 |= HF2_IGNNE_MASK;
/*
* We get here in response to a write to port F0h. The chipset should
* deassert FP_IRQ and FERR# instead should stay signaled until FPSW_SE is
* cleared, because FERR# and FP_IRQ are two separate pins on real
* hardware. However, we don't model FERR# as a qemu_irq, so we just
* do directly what the chipset would do, i.e. deassert FP_IRQ.
*/
qemu_irq_lower(ferr_irq);
}

1
target/i386/tcg/sysemu/meson.build
View file

@ -4,4 +4,5 @@ i386_softmmu_ss.add(when: ['CONFIG_TCG', 'CONFIG_SOFTMMU'], if_true: files(
'excp_helper.c',
'bpt_helper.c',
'misc_helper.c',
'fpu_helper.c',
))