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[PATCH v2 02/15] target/m68k: Switch over exception type in m68k_interru
From: |
Richard Henderson |
Subject: |
[PATCH v2 02/15] target/m68k: Switch over exception type in m68k_interrupt_all |
Date: |
Thu, 2 Dec 2021 12:48:47 -0800 |
Replace an if ladder with a switch for clarity.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/m68k/op_helper.c | 45 +++++++++++++++++++++++++----------------
1 file changed, 28 insertions(+), 17 deletions(-)
diff --git a/target/m68k/op_helper.c b/target/m68k/op_helper.c
index 36662de149..71176eb3d8 100644
--- a/target/m68k/op_helper.c
+++ b/target/m68k/op_helper.c
@@ -332,7 +332,8 @@ static void m68k_interrupt_all(CPUM68KState *env, int is_hw)
sp &= ~1;
}
- if (cs->exception_index == EXCP_ACCESS) {
+ switch (cs->exception_index) {
+ case EXCP_ACCESS:
if (env->mmu.fault) {
cpu_abort(cs, "DOUBLE MMU FAULT\n");
}
@@ -390,26 +391,36 @@ static void m68k_interrupt_all(CPUM68KState *env, int
is_hw)
"ssw: %08x ea: %08x sfc: %d dfc: %d\n",
env->mmu.ssw, env->mmu.ar, env->sfc, env->dfc);
}
- } else if (cs->exception_index == EXCP_ADDRESS) {
+ break;
+
+ case EXCP_ADDRESS:
do_stack_frame(env, &sp, 2, oldsr, 0, retaddr);
- } else if (cs->exception_index == EXCP_ILLEGAL ||
- cs->exception_index == EXCP_DIV0 ||
- cs->exception_index == EXCP_CHK ||
- cs->exception_index == EXCP_TRAPCC ||
- cs->exception_index == EXCP_TRACE) {
+ break;
+
+ case EXCP_ILLEGAL:
+ case EXCP_DIV0:
+ case EXCP_CHK:
+ case EXCP_TRAPCC:
+ case EXCP_TRACE:
/* FIXME: addr is not only env->pc */
do_stack_frame(env, &sp, 2, oldsr, env->pc, retaddr);
- } else if (is_hw && oldsr & SR_M &&
- cs->exception_index >= EXCP_SPURIOUS &&
- cs->exception_index <= EXCP_INT_LEVEL_7) {
- do_stack_frame(env, &sp, 0, oldsr, 0, retaddr);
- oldsr = sr;
- env->aregs[7] = sp;
- cpu_m68k_set_sr(env, sr &= ~SR_M);
- sp = env->aregs[7] & ~1;
- do_stack_frame(env, &sp, 1, oldsr, 0, retaddr);
- } else {
+ break;
+
+ case EXCP_SPURIOUS ... EXCP_INT_LEVEL_7:
+ if (is_hw && oldsr & SR_M) {
+ do_stack_frame(env, &sp, 0, oldsr, 0, retaddr);
+ oldsr = sr;
+ env->aregs[7] = sp;
+ cpu_m68k_set_sr(env, sr &= ~SR_M);
+ sp = env->aregs[7] & ~1;
+ do_stack_frame(env, &sp, 1, oldsr, 0, retaddr);
+ break;
+ }
+ /* fall through */
+
+ default:
do_stack_frame(env, &sp, 0, oldsr, 0, retaddr);
+ break;
}
env->aregs[7] = sp;
--
2.25.1
- [PATCH v2 00/15] target/m68k: Conditional traps + trap cleanup, Richard Henderson, 2021/12/02
- [PATCH v2 01/15] target/m68k: Raise the TRAPn exception with the correct pc, Richard Henderson, 2021/12/02
- [PATCH v2 04/15] linux-user/m68k: Handle EXCP_TRAP1 through EXCP_TRAP15, Richard Henderson, 2021/12/02
- [PATCH v2 02/15] target/m68k: Switch over exception type in m68k_interrupt_all,
Richard Henderson <=
- [PATCH v2 09/15] target/m68k: Implement TRAPcc, Richard Henderson, 2021/12/02
- [PATCH v2 12/15] target/m68k: Fix stack frame for EXCP_ILLEGAL, Richard Henderson, 2021/12/02
- [PATCH v2 14/15] linux-user/strace: Fix print_syscall_err, Richard Henderson, 2021/12/02
- [PATCH v2 13/15] tests/tcg/m68k: Add trap.c, Richard Henderson, 2021/12/02
- [PATCH v2 08/15] target/m68k: Fix address argument for EXCP_TRACE, Richard Henderson, 2021/12/02
- [PATCH v2 05/15] target/m68k: Remove retaddr in m68k_interrupt_all, Richard Henderson, 2021/12/02