[PATCH 1/9] target/mips: Introduce ase_msa_available() helper

[Philippe Mathieu-Daudé <f4bug@xxxxxxxxx>]

Instead of accessing CP0_Config3 directly and checking
the 'MSA Present' bit, introduce an explicit helper,
making the code easier to read.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@xxxxxxxxx>
---
 target/mips/internal.h  |  6 ++++++
 target/mips/kvm.c       | 12 ++++++------
 target/mips/translate.c |  8 +++-----
 3 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/target/mips/internal.h b/target/mips/internal.h
index dd8a7809b64..f882ac1580c 100644
--- a/target/mips/internal.h
+++ b/target/mips/internal.h
@@ -80,6 +80,12 @@ enum CPUMIPSMSADataFormat {
     DF_DOUBLE
 };
 
+/* Check presence of MSA implementation */
+static inline bool ase_msa_available(CPUMIPSState *env)
+{
+    return env->CP0_Config3 & (1 << CP0C3_MSAP);
+}
+
 void mips_cpu_do_interrupt(CPUState *cpu);
 bool mips_cpu_exec_interrupt(CPUState *cpu, int int_req);
 void mips_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
diff --git a/target/mips/kvm.c b/target/mips/kvm.c
index 72637a1e021..9bfd67ede39 100644
--- a/target/mips/kvm.c
+++ b/target/mips/kvm.c
@@ -81,7 +81,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
         }
     }
 
-    if (kvm_mips_msa_cap && env->CP0_Config3 & (1 << CP0C3_MSAP)) {
+    if (kvm_mips_msa_cap && ase_msa_available(env)) {
         ret = kvm_vcpu_enable_cap(cs, KVM_CAP_MIPS_MSA, 0, 0);
         if (ret < 0) {
             /* mark unsupported so it gets disabled on reset */
@@ -107,7 +107,7 @@ void kvm_mips_reset_vcpu(MIPSCPU *cpu)
         warn_report("KVM does not support FPU, disabling");
         env->CP0_Config1 &= ~(1 << CP0C1_FP);
     }
-    if (!kvm_mips_msa_cap && env->CP0_Config3 & (1 << CP0C3_MSAP)) {
+    if (!kvm_mips_msa_cap && ase_msa_available(env)) {
         warn_report("KVM does not support MSA, disabling");
         env->CP0_Config3 &= ~(1 << CP0C3_MSAP);
     }
@@ -624,7 +624,7 @@ static int kvm_mips_put_fpu_registers(CPUState *cs, int level)
          * FPU register state is a subset of MSA vector state, so don't put FPU
          * registers if we're emulating a CPU with MSA.
          */
-        if (!(env->CP0_Config3 & (1 << CP0C3_MSAP))) {
+        if (!ase_msa_available(env)) {
             /* Floating point registers */
             for (i = 0; i < 32; ++i) {
                 if (env->CP0_Status & (1 << CP0St_FR)) {
@@ -643,7 +643,7 @@ static int kvm_mips_put_fpu_registers(CPUState *cs, int level)
     }
 
     /* Only put MSA state if we're emulating a CPU with MSA */
-    if (env->CP0_Config3 & (1 << CP0C3_MSAP)) {
+    if (ase_msa_available(env)) {
         /* MSA Control Registers */
         if (level == KVM_PUT_FULL_STATE) {
             err = kvm_mips_put_one_reg(cs, KVM_REG_MIPS_MSA_IR,
@@ -704,7 +704,7 @@ static int kvm_mips_get_fpu_registers(CPUState *cs)
          * FPU register state is a subset of MSA vector state, so don't save FPU
          * registers if we're emulating a CPU with MSA.
          */
-        if (!(env->CP0_Config3 & (1 << CP0C3_MSAP))) {
+        if (!ase_msa_available(env)) {
             /* Floating point registers */
             for (i = 0; i < 32; ++i) {
                 if (env->CP0_Status & (1 << CP0St_FR)) {
@@ -723,7 +723,7 @@ static int kvm_mips_get_fpu_registers(CPUState *cs)
     }
 
     /* Only get MSA state if we're emulating a CPU with MSA */
-    if (env->CP0_Config3 & (1 << CP0C3_MSAP)) {
+    if (ase_msa_available(env)) {
         /* MSA Control Registers */
         err = kvm_mips_get_one_reg(cs, KVM_REG_MIPS_MSA_IR,
                                    &env->msair);
diff --git a/target/mips/translate.c b/target/mips/translate.c
index c64a1bc42e1..a7c01c2ea5b 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -25049,8 +25049,7 @@ static void decode_opc_special(CPUMIPSState *env, DisasContext *ctx)
         gen_trap(ctx, op1, rs, rt, -1);
         break;
     case OPC_LSA: /* OPC_PMON */
-        if ((ctx->insn_flags & ISA_MIPS32R6) ||
-            (env->CP0_Config3 & (1 << CP0C3_MSAP))) {
+        if ((ctx->insn_flags & ISA_MIPS32R6) || ase_msa_available(env)) {
             decode_opc_special_r6(env, ctx);
         } else {
             /* Pmon entry point, also R4010 selsl */
@@ -25152,8 +25151,7 @@ static void decode_opc_special(CPUMIPSState *env, DisasContext *ctx)
         }
         break;
     case OPC_DLSA:
-        if ((ctx->insn_flags & ISA_MIPS32R6) ||
-            (env->CP0_Config3 & (1 << CP0C3_MSAP))) {
+        if ((ctx->insn_flags & ISA_MIPS32R6) || ase_msa_available(env)) {
             decode_opc_special_r6(env, ctx);
         }
         break;
@@ -32000,7 +31998,7 @@ void cpu_state_reset(CPUMIPSState *env)
     }
 
     /* MSA */
-    if (env->CP0_Config3 & (1 << CP0C3_MSAP)) {
+    if (ase_msa_available(env)) {
         msa_reset(env);
     }
 
-- 
2.26.2