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[Qemu-devel] [PATCH v5 6/6] target-m68k, linux-user: manage FP registers
From: |
Laurent Vivier |
Subject: |
[Qemu-devel] [PATCH v5 6/6] target-m68k, linux-user: manage FP registers in ucontext |
Date: |
Tue, 20 Jun 2017 22:51:21 +0200 |
Signed-off-by: Laurent Vivier <address@hidden>
---
linux-user/signal.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 3d18d1b..d3753e4 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 +5717,30 @@ 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;
+
+ __get_user(env->fpcr, &fpregs->f_fpcntl[0]);
+ __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 +5772,8 @@ 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 v5 2/6] target-m68k: initialize FPU registers, Laurent Vivier, 2017/06/20
[Qemu-devel] [PATCH v5 5/6] target-m68k: add FPCR and FPSR, Laurent Vivier, 2017/06/20