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[Qemu-devel] [PATCH v2] target-m68k, linux-user: manage FP registers in
From: |
Laurent Vivier |
Subject: |
[Qemu-devel] [PATCH v2] target-m68k, linux-user: manage FP registers in ucontext |
Date: |
Wed, 21 Jun 2017 23:07:04 +0200 |
Signed-off-by: Laurent Vivier <address@hidden>
---
v2:
add missing cpu_m68k_set_fpcr() to update FPU internal state
The v1 was in the v5 of the series "target-m68k: implement 680x0 FPU"
linux-user/signal.c | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 3d18d1b..197e8d1 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -5673,6 +5673,24 @@ give_sigsegv:
force_sigsegv(sig);
}
+static inline void target_rt_save_fpu_state(struct target_ucontext *uc,
+ CPUM68KState *env)
+{
+ int i;
+ target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
+
+ __put_user(env->fpcr, &fpregs->f_fpcntl[0]);
+ __put_user(env->fpsr, &fpregs->f_fpcntl[1]);
+ /* fpiar is not emulated */
+
+ for (i = 0; i < 8; i++) {
+ uint32_t high = env->fregs[i].d.high << 16;
+ __put_user(high, &fpregs->f_fpregs[i * 3]);
+ __put_user(env->fregs[i].d.low,
+ (uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
+ }
+}
+
static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
CPUM68KState *env)
{
@@ -5699,9 +5717,32 @@ static inline int target_rt_setup_ucontext(struct
target_ucontext *uc,
__put_user(env->pc, &gregs[16]);
__put_user(sr, &gregs[17]);
+ target_rt_save_fpu_state(uc, env);
+
return 0;
}
+static inline void target_rt_restore_fpu_state(CPUM68KState *env,
+ struct target_ucontext *uc)
+{
+ int i;
+ target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
+ uint32_t fpcr;
+
+ __get_user(fpcr, &fpregs->f_fpcntl[0]);
+ cpu_m68k_set_fpcr(env, fpcr);
+ __get_user(env->fpsr, &fpregs->f_fpcntl[1]);
+ /* fpiar is not emulated */
+
+ for (i = 0; i < 8; i++) {
+ uint32_t high;
+ __get_user(high, &fpregs->f_fpregs[i * 3]);
+ env->fregs[i].d.high = high >> 16;
+ __get_user(env->fregs[i].d.low,
+ (uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
+ }
+}
+
static inline int target_rt_restore_ucontext(CPUM68KState *env,
struct target_ucontext *uc)
{
@@ -5733,6 +5774,8 @@ static inline int target_rt_restore_ucontext(CPUM68KState
*env,
__get_user(temp, &gregs[17]);
cpu_m68k_set_ccr(env, temp);
+ target_rt_restore_fpu_state(env, uc);
+
return 0;
badframe:
--
2.9.4
- [Qemu-devel] [PATCH v2] target-m68k, linux-user: manage FP registers in ucontext,
Laurent Vivier <=