[Qemu-devel] [PATCH v3 24/26] tcg-aarch64: Replace aarch64_ldst_op_data with AArch64LdstType

[Richard Henderson <rth@twiddle.net>]

The definition of op_type wasn't encoded for the proper shift for
the field, making the implementations confusing.

Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 tcg/aarch64/tcg-target.c | 42 +++++++++++++++++-------------------------
 1 file changed, 17 insertions(+), 25 deletions(-)

diff --git a/tcg/aarch64/tcg-target.c b/tcg/aarch64/tcg-target.c
index 9a2e4a6..a538a87 100644
--- a/tcg/aarch64/tcg-target.c
+++ b/tcg/aarch64/tcg-target.c
@@ -242,12 +242,12 @@ static const enum aarch64_cond_code tcg_cond_to_aarch64[] = {
     [TCG_COND_LEU] = COND_LS,
 };
 
-enum aarch64_ldst_op_type { /* type of operation */
-    LDST_ST = 0x0,    /* store */
-    LDST_LD = 0x4,    /* load */
-    LDST_LD_S_X = 0x8,  /* load and sign-extend into Xt */
-    LDST_LD_S_W = 0xc,  /* load and sign-extend into Wt */
-};
+typedef enum {
+    LDST_ST = 0,    /* store */
+    LDST_LD = 1,    /* load */
+    LDST_LD_S_X = 2,  /* load and sign-extend into Xt */
+    LDST_LD_S_W = 3,  /* load and sign-extend into Wt */
+} AArch64LdstType;
 
 /* We encode the format of the insn into the beginning of the name, so that
    we can have the preprocessor help "typecheck" the insn vs the output
@@ -483,22 +483,19 @@ static void tcg_out_insn_3509(TCGContext *s, AArch64Insn insn, TCGType ext,
 }
 
 
-static inline void tcg_out_ldst_9(TCGContext *s, TCGMemOp size,
-                                  enum aarch64_ldst_op_type op_type,
-                                  TCGReg rd, TCGReg rn, intptr_t offset)
+static void tcg_out_ldst_9(TCGContext *s, TCGMemOp size, AArch64LdstType type,
+                           TCGReg rd, TCGReg rn, intptr_t offset)
 {
     /* use LDUR with BASE register with 9bit signed unscaled offset */
-    tcg_out32(s, 0x38000000 | size << 30 | op_type << 20
+    tcg_out32(s, 0x38000000 | size << 30 | type << 22
               | (offset & 0x1ff) << 12 | rn << 5 | rd);
 }
 
 /* tcg_out_ldst_12 expects a scaled unsigned immediate offset */
-static inline void tcg_out_ldst_12(TCGContext *s, TCGMemOp size,
-                                   enum aarch64_ldst_op_type op_type,
-                                   TCGReg rd, TCGReg rn,
-                                   tcg_target_ulong scaled_uimm)
+static void tcg_out_ldst_12(TCGContext *s, TCGMemOp size, AArch64LdstType type,
+                            TCGReg rd, TCGReg rn, tcg_target_ulong scaled_uimm)
 {
-    tcg_out32(s, 0x39000000 | size << 30 | op_type << 20
+    tcg_out32(s, 0x39000000 | size << 30 | type << 22
               | scaled_uimm << 10 | rn << 5 | rd);
 }
 
@@ -637,21 +634,16 @@ static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd,
     }
 }
 
-static inline void tcg_out_ldst_r(TCGContext *s, TCGMemOp size,
-                                  enum aarch64_ldst_op_type op_type,
-                                  TCGReg rd, TCGReg base, TCGReg regoff)
+static void tcg_out_ldst_r(TCGContext *s, TCGMemOp size, AArch64LdstType type,
+                           TCGReg rd, TCGReg base, TCGReg regoff)
 {
-    /* load from memory to register using base + 64bit register offset */
-    /* using f.e. STR Wt, [Xn, Xm] 0xb8600800|(regoff << 16)|(base << 5)|rd */
-    /* the 0x6000 is for the "no extend field" */
-    tcg_out32(s, 0x38206800 | size << 30 | op_type << 20
+    tcg_out32(s, 0x38206800 | size << 30 | type << 22
               | regoff << 16 | base << 5 | rd);
 }
 
 /* solve the whole ldst problem */
-static inline void tcg_out_ldst(TCGContext *s, TCGMemOp size,
-                                enum aarch64_ldst_op_type type,
-                                TCGReg rd, TCGReg rn, intptr_t offset)
+static void tcg_out_ldst(TCGContext *s, TCGMemOp size, AArch64LdstType type,
+                         TCGReg rd, TCGReg rn, intptr_t offset)
 {
     if (offset >= -256 && offset < 256) {
         tcg_out_ldst_9(s, size, type, rd, rn, offset);
-- 
1.9.0