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[Qemu-devel] [PATCH 04/14] ppc: introduce ppc_get_cr and ppc_set_cr
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From: |
Paolo Bonzini |
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Subject: |
[Qemu-devel] [PATCH 04/14] ppc: introduce ppc_get_cr and ppc_set_cr |
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Date: |
Mon, 15 Sep 2014 17:03:31 +0200 |
New functions to put together all 32 CR bits. Avoids easy
off-by-one mistakes such as the one fixed by commit f13f529
(ppc: fix monitor access to CR, 2014-08-28).
Signed-off-by: Paolo Bonzini <address@hidden>
---
v1->v2: replaces "ppc: use ARRAY_SIZE in gdbstub.c"
linux-user/elfload.c | 4 +---
linux-user/signal.c | 8 ++------
monitor.c | 9 +--------
target-ppc/cpu.h | 20 ++++++++++++++++++++
target-ppc/gdbstub.c | 42 ++++++++----------------------------------
target-ppc/kvm.c | 11 ++---------
6 files changed, 34 insertions(+), 60 deletions(-)
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index bea803b..a7d1714 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -857,9 +857,7 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs,
const CPUPPCState *en
(*regs)[36] = tswapreg(env->lr);
(*regs)[37] = tswapreg(env->xer);
- for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
- ccr |= env->crf[i] << (32 - ((i + 1) * 4));
- }
+ ccr = ppc_get_cr(env);
(*regs)[38] = tswapreg(ccr);
}
diff --git a/linux-user/signal.c b/linux-user/signal.c
index e11b208..97c3107 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -4534,9 +4534,7 @@ static void save_user_regs(CPUPPCState *env, struct
target_mcontext *frame)
__put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]);
__put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
- for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
- ccr |= env->crf[i] << (32 - ((i + 1) * 4));
- }
+ ccr = ppc_get_cr(env);
__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
/* Save Altivec registers if necessary. */
@@ -4616,9 +4614,7 @@ static void restore_user_regs(CPUPPCState *env,
__get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER]);
__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR]);
- for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
- env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf;
- }
+ ppc_set_cr(env, ccr);
if (!sig) {
env->gpr[2] = save_r2;
diff --git a/monitor.c b/monitor.c
index ec73dd4..80acf25 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2963,14 +2963,7 @@ static target_long monitor_get_pc (const struct
MonitorDef *md, int val)
static target_long monitor_get_ccr (const struct MonitorDef *md, int val)
{
CPUArchState *env = mon_get_cpu();
- unsigned int u;
- int i;
-
- u = 0;
- for (i = 0; i < 8; i++)
- u |= env->crf[i] << (32 - (4 * (i + 1)));
-
- return u;
+ return ppc_get_cr(env);
}
static target_long monitor_get_msr (const struct MonitorDef *md, int val)
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index c29ce3b..0c0196d 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -1197,6 +1197,26 @@ void ppc_tlb_invalidate_one (CPUPPCState *env,
target_ulong addr);
void store_fpscr(CPUPPCState *env, uint64_t arg, uint32_t mask);
+static inline uint32_t ppc_get_cr(const CPUPPCState *env)
+{
+ uint32_t cr = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
+ cr |= env->crf[i] << (32 - ((i + 1) * 4));
+ }
+ return cr;
+}
+
+static inline void ppc_set_cr(CPUPPCState *env, uint32_t cr)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
+ env->crf[i] = (cr >> (32 - ((i + 1) * 4))) & 0xF;
+ }
+}
+
static inline uint64_t ppc_dump_gpr(CPUPPCState *env, int gprn)
{
uint64_t gprv;
diff --git a/target-ppc/gdbstub.c b/target-ppc/gdbstub.c
index 14675f4..11d138e 100644
--- a/target-ppc/gdbstub.c
+++ b/target-ppc/gdbstub.c
@@ -135,15 +135,8 @@ int ppc_cpu_gdb_read_register(CPUState *cs, uint8_t
*mem_buf, int n)
gdb_get_regl(mem_buf, env->msr);
break;
case 66:
- {
- uint32_t cr = 0;
- int i;
- for (i = 0; i < 8; i++) {
- cr |= env->crf[i] << (32 - ((i + 1) * 4));
- }
- gdb_get_reg32(mem_buf, cr);
- break;
- }
+ gdb_get_reg32(mem_buf, ppc_get_cr(env));
+ break;
case 67:
gdb_get_regl(mem_buf, env->lr);
break;
@@ -191,15 +184,8 @@ int ppc_cpu_gdb_read_register_apple(CPUState *cs, uint8_t
*mem_buf, int n)
gdb_get_reg64(mem_buf, env->msr);
break;
case 66 + 32:
- {
- uint32_t cr = 0;
- int i;
- for (i = 0; i < 8; i++) {
- cr |= env->crf[i] << (32 - ((i + 1) * 4));
- }
- gdb_get_reg32(mem_buf, cr);
- break;
- }
+ gdb_get_reg32(mem_buf, ppc_get_cr(env));
+ break;
case 67 + 32:
gdb_get_reg64(mem_buf, env->lr);
break;
@@ -243,14 +229,8 @@ int ppc_cpu_gdb_write_register(CPUState *cs, uint8_t
*mem_buf, int n)
ppc_store_msr(env, ldtul_p(mem_buf));
break;
case 66:
- {
- uint32_t cr = ldl_p(mem_buf);
- int i;
- for (i = 0; i < 8; i++) {
- env->crf[i] = (cr >> (32 - ((i + 1) * 4))) & 0xF;
- }
- break;
- }
+ ppc_set_cr(env, ldl_p(mem_buf));
+ break;
case 67:
env->lr = ldtul_p(mem_buf);
break;
@@ -293,14 +273,8 @@ int ppc_cpu_gdb_write_register_apple(CPUState *cs, uint8_t
*mem_buf, int n)
ppc_store_msr(env, ldq_p(mem_buf));
break;
case 66 + 32:
- {
- uint32_t cr = ldl_p(mem_buf);
- int i;
- for (i = 0; i < 8; i++) {
- env->crf[i] = (cr >> (32 - ((i + 1) * 4))) & 0xF;
- }
- break;
- }
+ ppc_set_cr(env, ldl_p(mem_buf));
+ break;
case 67 + 32:
env->lr = ldq_p(mem_buf);
break;
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 9c23c6b..e541b9e 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -831,10 +831,7 @@ int kvm_arch_put_registers(CPUState *cs, int level)
for (i = 0;i < 32; i++)
regs.gpr[i] = env->gpr[i];
- regs.cr = 0;
- for (i = 0; i < 8; i++) {
- regs.cr |= (env->crf[i] & 15) << (4 * (7 - i));
- }
+ regs.cr = ppc_get_cr(env);
ret = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s);
if (ret < 0)
@@ -955,11 +952,7 @@ int kvm_arch_get_registers(CPUState *cs)
if (ret < 0)
return ret;
- cr = regs.cr;
- for (i = 7; i >= 0; i--) {
- env->crf[i] = cr & 15;
- cr >>= 4;
- }
+ ppc_set_cr(env, regs.cr);
env->ctr = regs.ctr;
env->lr = regs.lr;
--
1.8.3.1