[Qemu-arm] [PATCH 1/3] target-arm: Correct misleading 'is_thumb' syn_* parameter names

[Peter Maydell]

In syndrome register values, the IL bit indicates the instruction
length, and is 1 for 4-byte instructions and 0 for 2-byte
instructions. All A64 and A32 instructions are 4-byte, but
Thumb instructions may be either 2 or 4 bytes long. Unfortunately
we named the parameter to the syn_* functions for constructing
syndromes "is_thumb", which falsely implies that it should be
set for all Thumb instructions, rather than only the 16-bit ones.
Fix the functions to name the parameter 'is_16bit' instead.

Signed-off-by: Peter Maydell <address@hidden>
---
 target-arm/internals.h | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/target-arm/internals.h b/target-arm/internals.h
index d226bbe..a648c1e 100644
--- a/target-arm/internals.h
+++ b/target-arm/internals.h
@@ -270,10 +270,10 @@ static inline uint32_t syn_aa64_smc(uint32_t imm16)
     return (EC_AA64_SMC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
 }
 
-static inline uint32_t syn_aa32_svc(uint32_t imm16, bool is_thumb)
+static inline uint32_t syn_aa32_svc(uint32_t imm16, bool is_16bit)
 {
     return (EC_AA32_SVC << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
-        | (is_thumb ? 0 : ARM_EL_IL);
+        | (is_16bit ? 0 : ARM_EL_IL);
 }
 
 static inline uint32_t syn_aa32_hvc(uint32_t imm16)
@@ -291,10 +291,10 @@ static inline uint32_t syn_aa64_bkpt(uint32_t imm16)
     return (EC_AA64_BKPT << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
 }
 
-static inline uint32_t syn_aa32_bkpt(uint32_t imm16, bool is_thumb)
+static inline uint32_t syn_aa32_bkpt(uint32_t imm16, bool is_16bit)
 {
     return (EC_AA32_BKPT << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
-        | (is_thumb ? 0 : ARM_EL_IL);
+        | (is_16bit ? 0 : ARM_EL_IL);
 }
 
 static inline uint32_t syn_aa64_sysregtrap(int op0, int op1, int op2,
@@ -308,48 +308,48 @@ static inline uint32_t syn_aa64_sysregtrap(int op0, int 
op1, int op2,
 
 static inline uint32_t syn_cp14_rt_trap(int cv, int cond, int opc1, int opc2,
                                         int crn, int crm, int rt, int isread,
-                                        bool is_thumb)
+                                        bool is_16bit)
 {
     return (EC_CP14RTTRAP << ARM_EL_EC_SHIFT)
-        | (is_thumb ? 0 : ARM_EL_IL)
+        | (is_16bit ? 0 : ARM_EL_IL)
         | (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
         | (crn << 10) | (rt << 5) | (crm << 1) | isread;
 }
 
 static inline uint32_t syn_cp15_rt_trap(int cv, int cond, int opc1, int opc2,
                                         int crn, int crm, int rt, int isread,
-                                        bool is_thumb)
+                                        bool is_16bit)
 {
     return (EC_CP15RTTRAP << ARM_EL_EC_SHIFT)
-        | (is_thumb ? 0 : ARM_EL_IL)
+        | (is_16bit ? 0 : ARM_EL_IL)
         | (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
         | (crn << 10) | (rt << 5) | (crm << 1) | isread;
 }
 
 static inline uint32_t syn_cp14_rrt_trap(int cv, int cond, int opc1, int crm,
                                          int rt, int rt2, int isread,
-                                         bool is_thumb)
+                                         bool is_16bit)
 {
     return (EC_CP14RRTTRAP << ARM_EL_EC_SHIFT)
-        | (is_thumb ? 0 : ARM_EL_IL)
+        | (is_16bit ? 0 : ARM_EL_IL)
         | (cv << 24) | (cond << 20) | (opc1 << 16)
         | (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
 }
 
 static inline uint32_t syn_cp15_rrt_trap(int cv, int cond, int opc1, int crm,
                                          int rt, int rt2, int isread,
-                                         bool is_thumb)
+                                         bool is_16bit)
 {
     return (EC_CP15RRTTRAP << ARM_EL_EC_SHIFT)
-        | (is_thumb ? 0 : ARM_EL_IL)
+        | (is_16bit ? 0 : ARM_EL_IL)
         | (cv << 24) | (cond << 20) | (opc1 << 16)
         | (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
 }
 
-static inline uint32_t syn_fp_access_trap(int cv, int cond, bool is_thumb)
+static inline uint32_t syn_fp_access_trap(int cv, int cond, bool is_16bit)
 {
     return (EC_ADVSIMDFPACCESSTRAP << ARM_EL_EC_SHIFT)
-        | (is_thumb ? 0 : ARM_EL_IL)
+        | (is_16bit ? 0 : ARM_EL_IL)
         | (cv << 24) | (cond << 20);
 }
 
-- 
1.9.1