[PATCH v26 14/20] i386: separate fpu_helper sysemu-only parts

From: Claudio Fontana <cfontana@suse.de>
To: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Richard Henderson" <richard.henderson@linaro.org>,
	"Philippe Mathieu-Daudé" <philmd@redhat.com>,
	"Eduardo Habkost" <ehabkost@redhat.com>,
	"Peter Maydell" <peter.maydell@linaro.org>,
	"Alex Bennée" <alex.bennee@linaro.org>
Cc: Laurent Vivier <lvivier@redhat.com>,
	Thomas Huth <thuth@redhat.com>,
	Roman Bolshakov <r.bolshakov@yadro.com>,
	Claudio Fontana <cfontana@suse.de>,
	qemu-devel@nongnu.org
Subject: [PATCH v26 14/20] i386: separate fpu_helper sysemu-only parts
Date: Mon,  1 Mar 2021 09:54:44 +0100	[thread overview]
Message-ID: <20210301085450.1732-15-cfontana@suse.de> (raw)
In-Reply-To: <20210301085450.1732-1-cfontana@suse.de>

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>
---
 target/i386/cpu.h                   |  3 ++
 target/i386/tcg/fpu_helper.c        | 41 +--------------------
 target/i386/tcg/sysemu/fpu_helper.c | 57 +++++++++++++++++++++++++++++
 target/i386/tcg/sysemu/meson.build  |  1 +
 4 files changed, 63 insertions(+), 39 deletions(-)
 create mode 100644 target/i386/tcg/sysemu/fpu_helper.c

diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index c8a84a9033..3797789dc2 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1816,7 +1816,10 @@ 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);
 
diff --git a/target/i386/tcg/fpu_helper.c b/target/i386/tcg/fpu_helper.c
index 20e4d2e715..1b30f1bb73 100644
--- a/target/i386/tcg/fpu_helper.c
+++ b/target/i386/tcg/fpu_helper.c
@@ -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
 }
diff --git a/target/i386/tcg/sysemu/fpu_helper.c b/target/i386/tcg/sysemu/fpu_helper.c
new file mode 100644
index 0000000000..1c3610da3b
--- /dev/null
+++ b/target/i386/tcg/sysemu/fpu_helper.c
@@ -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);
+}
diff --git a/target/i386/tcg/sysemu/meson.build b/target/i386/tcg/sysemu/meson.build
index b2aaab6eef..f84519a213 100644
--- a/target/i386/tcg/sysemu/meson.build
+++ b/target/i386/tcg/sysemu/meson.build
@@ -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',
 ))
-- 
2.26.2


