[PULL 41/67] target/ppc: simplify var usage in ppc_next_unmasked_interrupt

[Nicholas Piggin]

From: Harsh Prateek Bora <harshpb@linux.ibm.com>

As previously done for arch specific handlers, simplify var usage in
ppc_next_unmasked_interrupt by caching the env->pending_interrupts and
env->spr[SPR_LPCR] in local vars and using it later at multiple places.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 target/ppc/excp_helper.c | 54 ++++++++++++++++++++--------------------
 1 file changed, 27 insertions(+), 27 deletions(-)

diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 8d2e880c83..2806afd9bd 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -2022,31 +2022,31 @@ static int p9_next_unmasked_interrupt(CPUPPCState *env,
 
 static int ppc_next_unmasked_interrupt(CPUPPCState *env)
 {
+    uint32_t pending_interrupts = env->pending_interrupts;
+    target_ulong lpcr = env->spr[SPR_LPCR];
+    bool async_deliver;
+
 #ifdef TARGET_PPC64
     switch (env->excp_model) {
     case POWERPC_EXCP_POWER7:
-        return p7_next_unmasked_interrupt(env, env->pending_interrupts,
-                                          env->spr[SPR_LPCR]);
+        return p7_next_unmasked_interrupt(env, pending_interrupts, lpcr);
     case POWERPC_EXCP_POWER8:
-        return p8_next_unmasked_interrupt(env, env->pending_interrupts,
-                                          env->spr[SPR_LPCR]);
+        return p8_next_unmasked_interrupt(env, pending_interrupts, lpcr);
     case POWERPC_EXCP_POWER9:
     case POWERPC_EXCP_POWER10:
     case POWERPC_EXCP_POWER11:
-        return p9_next_unmasked_interrupt(env, env->pending_interrupts,
-                                          env->spr[SPR_LPCR]);
+        return p9_next_unmasked_interrupt(env, pending_interrupts, lpcr);
     default:
         break;
     }
 #endif
-    bool async_deliver;
 
     /* External reset */
-    if (env->pending_interrupts & PPC_INTERRUPT_RESET) {
+    if (pending_interrupts & PPC_INTERRUPT_RESET) {
         return PPC_INTERRUPT_RESET;
     }
     /* Machine check exception */
-    if (env->pending_interrupts & PPC_INTERRUPT_MCK) {
+    if (pending_interrupts & PPC_INTERRUPT_MCK) {
         return PPC_INTERRUPT_MCK;
     }
 #if 0 /* TODO */
@@ -2065,9 +2065,9 @@ static int ppc_next_unmasked_interrupt(CPUPPCState *env)
     async_deliver = FIELD_EX64(env->msr, MSR, EE) || env->resume_as_sreset;
 
     /* Hypervisor decrementer exception */
-    if (env->pending_interrupts & PPC_INTERRUPT_HDECR) {
+    if (pending_interrupts & PPC_INTERRUPT_HDECR) {
         /* LPCR will be clear when not supported so this will work */
-        bool hdice = !!(env->spr[SPR_LPCR] & LPCR_HDICE);
+        bool hdice = !!(lpcr & LPCR_HDICE);
         if ((async_deliver || !FIELD_EX64_HV(env->msr)) && hdice) {
             /* HDEC clears on delivery */
             return PPC_INTERRUPT_HDECR;
@@ -2075,18 +2075,18 @@ static int ppc_next_unmasked_interrupt(CPUPPCState *env)
     }
 
     /* Hypervisor virtualization interrupt */
-    if (env->pending_interrupts & PPC_INTERRUPT_HVIRT) {
+    if (pending_interrupts & PPC_INTERRUPT_HVIRT) {
         /* LPCR will be clear when not supported so this will work */
-        bool hvice = !!(env->spr[SPR_LPCR] & LPCR_HVICE);
+        bool hvice = !!(lpcr & LPCR_HVICE);
         if ((async_deliver || !FIELD_EX64_HV(env->msr)) && hvice) {
             return PPC_INTERRUPT_HVIRT;
         }
     }
 
     /* External interrupt can ignore MSR:EE under some circumstances */
-    if (env->pending_interrupts & PPC_INTERRUPT_EXT) {
-        bool lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0);
-        bool heic = !!(env->spr[SPR_LPCR] & LPCR_HEIC);
+    if (pending_interrupts & PPC_INTERRUPT_EXT) {
+        bool lpes0 = !!(lpcr & LPCR_LPES0);
+        bool heic = !!(lpcr & LPCR_HEIC);
         /* HEIC blocks delivery to the hypervisor */
         if ((async_deliver && !(heic && FIELD_EX64_HV(env->msr) &&
             !FIELD_EX64(env->msr, MSR, PR))) ||
@@ -2096,45 +2096,45 @@ static int ppc_next_unmasked_interrupt(CPUPPCState *env)
     }
     if (FIELD_EX64(env->msr, MSR, CE)) {
         /* External critical interrupt */
-        if (env->pending_interrupts & PPC_INTERRUPT_CEXT) {
+        if (pending_interrupts & PPC_INTERRUPT_CEXT) {
             return PPC_INTERRUPT_CEXT;
         }
     }
     if (async_deliver != 0) {
         /* Watchdog timer on embedded PowerPC */
-        if (env->pending_interrupts & PPC_INTERRUPT_WDT) {
+        if (pending_interrupts & PPC_INTERRUPT_WDT) {
             return PPC_INTERRUPT_WDT;
         }
-        if (env->pending_interrupts & PPC_INTERRUPT_CDOORBELL) {
+        if (pending_interrupts & PPC_INTERRUPT_CDOORBELL) {
             return PPC_INTERRUPT_CDOORBELL;
         }
         /* Fixed interval timer on embedded PowerPC */
-        if (env->pending_interrupts & PPC_INTERRUPT_FIT) {
+        if (pending_interrupts & PPC_INTERRUPT_FIT) {
             return PPC_INTERRUPT_FIT;
         }
         /* Programmable interval timer on embedded PowerPC */
-        if (env->pending_interrupts & PPC_INTERRUPT_PIT) {
+        if (pending_interrupts & PPC_INTERRUPT_PIT) {
             return PPC_INTERRUPT_PIT;
         }
         /* Decrementer exception */
-        if (env->pending_interrupts & PPC_INTERRUPT_DECR) {
+        if (pending_interrupts & PPC_INTERRUPT_DECR) {
             return PPC_INTERRUPT_DECR;
         }
-        if (env->pending_interrupts & PPC_INTERRUPT_DOORBELL) {
+        if (pending_interrupts & PPC_INTERRUPT_DOORBELL) {
             return PPC_INTERRUPT_DOORBELL;
         }
-        if (env->pending_interrupts & PPC_INTERRUPT_HDOORBELL) {
+        if (pending_interrupts & PPC_INTERRUPT_HDOORBELL) {
             return PPC_INTERRUPT_HDOORBELL;
         }
-        if (env->pending_interrupts & PPC_INTERRUPT_PERFM) {
+        if (pending_interrupts & PPC_INTERRUPT_PERFM) {
             return PPC_INTERRUPT_PERFM;
         }
         /* Thermal interrupt */
-        if (env->pending_interrupts & PPC_INTERRUPT_THERM) {
+        if (pending_interrupts & PPC_INTERRUPT_THERM) {
             return PPC_INTERRUPT_THERM;
         }
         /* EBB exception */
-        if (env->pending_interrupts & PPC_INTERRUPT_EBB) {
+        if (pending_interrupts & PPC_INTERRUPT_EBB) {
             /*
              * EBB exception must be taken in problem state and
              * with BESCR_GE set.
-- 
2.45.2