[PATCH v3 17/21] target/ppc: Remove msr_fe0 and msr_fe1 macros

[Víctor Colombo]

msr_fe0 and msr_fe1 macros hide the usage of env->msr, which is a bad
behavior. Substitute it with FIELD_EX64 calls that explicitly use
env->msr as a parameter.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Víctor Colombo <victor.colombo@eldorado.org.br>

---

v3: Added a combined macro for FE0 and FE1. Use it to simplify
    conditionals. Removed Richard's R-b because of this change.
Signed-off-by: Víctor Colombo <victor.colombo@eldorado.org.br>
---
 target/ppc/cpu.h         | 11 +++++++++--
 target/ppc/excp_helper.c | 18 ++++++------------
 2 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 9683e6a359..cc7ca1d47d 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -363,12 +363,21 @@ FIELD(MSR, EE, MSR_EE, 1)
 FIELD(MSR, PR, MSR_PR, 1)
 FIELD(MSR, FP, MSR_FP, 1)
 FIELD(MSR, ME, MSR_ME, 1)
+FIELD(MSR, FE0, MSR_FE0, 1)
+FIELD(MSR, FE1, MSR_FE1, 1)
 FIELD(MSR, EP, MSR_EP, 1)
 FIELD(MSR, IR, MSR_IR, 1)
 FIELD(MSR, DR, MSR_DR, 1)
 FIELD(MSR, DS, MSR_DS, 1)
 FIELD(MSR, LE, MSR_LE, 1)
 
+/*
+ * FE0 and FE1 bits are not side-by-side
+ * so we can't combine them using FIELD()
+ */
+#define FIELD_EX64_FE(msr) \
+    ((FIELD_EX64(msr, MSR, FE0) << 1) | FIELD_EX64(msr, MSR, FE1))
+
 /* PMU bits */
 #define MMCR0_FC     PPC_BIT(32)         /* Freeze Counters  */
 #define MMCR0_PMAO   PPC_BIT(56)         /* Perf Monitor Alert Ocurred */
@@ -484,8 +493,6 @@ FIELD(MSR, LE, MSR_LE, 1)
 #else
 #define msr_hv   (0)
 #endif
-#define msr_fe0  ((env->msr >> MSR_FE0)  & 1)
-#define msr_fe1  ((env->msr >> MSR_FE1)  & 1)
 #define msr_ts   ((env->msr >> MSR_TS1)  & 3)
 
 #define DBCR0_ICMP (1 << 27)
diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 30baad0489..aa201c63c6 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -478,8 +478,7 @@ static void powerpc_excp_40x(PowerPCCPU *cpu, int excp)
     case POWERPC_EXCP_PROGRAM:   /* Program exception                        */
         switch (env->error_code & ~0xF) {
         case POWERPC_EXCP_FP:
-            if ((msr_fe0 == 0 && msr_fe1 == 0) ||
-                !FIELD_EX64(env->msr, MSR, FP)) {
+            if (!FIELD_EX64_FE(env->msr) || !FIELD_EX64(env->msr, MSR, FP)) {
                 trace_ppc_excp_fp_ignore();
                 powerpc_reset_excp_state(cpu);
                 return;
@@ -616,8 +615,7 @@ static void powerpc_excp_6xx(PowerPCCPU *cpu, int excp)
     case POWERPC_EXCP_PROGRAM:   /* Program exception                        */
         switch (env->error_code & ~0xF) {
         case POWERPC_EXCP_FP:
-            if ((msr_fe0 == 0 && msr_fe1 == 0) ||
-                !FIELD_EX64(env->msr, MSR, FP)) {
+            if (!FIELD_EX64_FE(env->msr) || !FIELD_EX64(env->msr, MSR, FP)) {
                 trace_ppc_excp_fp_ignore();
                 powerpc_reset_excp_state(cpu);
                 return;
@@ -790,8 +788,7 @@ static void powerpc_excp_7xx(PowerPCCPU *cpu, int excp)
     case POWERPC_EXCP_PROGRAM:   /* Program exception                        */
         switch (env->error_code & ~0xF) {
         case POWERPC_EXCP_FP:
-            if ((msr_fe0 == 0 && msr_fe1 == 0) ||
-                !FIELD_EX64(env->msr, MSR, FP)) {
+            if (!FIELD_EX64_FE(env->msr) || !FIELD_EX64(env->msr, MSR, FP)) {
                 trace_ppc_excp_fp_ignore();
                 powerpc_reset_excp_state(cpu);
                 return;
@@ -976,8 +973,7 @@ static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
     case POWERPC_EXCP_PROGRAM:   /* Program exception                        */
         switch (env->error_code & ~0xF) {
         case POWERPC_EXCP_FP:
-            if ((msr_fe0 == 0 && msr_fe1 == 0) ||
-                !FIELD_EX64(env->msr, MSR, FP)) {
+            if (!FIELD_EX64_FE(env->msr) || !FIELD_EX64(env->msr, MSR, FP)) {
                 trace_ppc_excp_fp_ignore();
                 powerpc_reset_excp_state(cpu);
                 return;
@@ -1175,8 +1171,7 @@ static void powerpc_excp_booke(PowerPCCPU *cpu, int excp)
     case POWERPC_EXCP_PROGRAM:   /* Program exception                        */
         switch (env->error_code & ~0xF) {
         case POWERPC_EXCP_FP:
-            if ((msr_fe0 == 0 && msr_fe1 == 0) ||
-                !FIELD_EX64(env->msr, MSR, FP)) {
+            if (!FIELD_EX64_FE(env->msr) || !FIELD_EX64(env->msr, MSR, FP)) {
                 trace_ppc_excp_fp_ignore();
                 powerpc_reset_excp_state(cpu);
                 return;
@@ -1439,8 +1434,7 @@ static void powerpc_excp_books(PowerPCCPU *cpu, int excp)
     case POWERPC_EXCP_PROGRAM:   /* Program exception                        */
         switch (env->error_code & ~0xF) {
         case POWERPC_EXCP_FP:
-            if ((msr_fe0 == 0 && msr_fe1 == 0) ||
-                !FIELD_EX64(env->msr, MSR, FP)) {
+            if (!FIELD_EX64_FE(env->msr) || !FIELD_EX64(env->msr, MSR, FP)) {
                 trace_ppc_excp_fp_ignore();
                 powerpc_reset_excp_state(cpu);
                 return;
-- 
2.25.1