[PULL 17/41] target/ppc: Move isync instruction to decodetree

[Harsh Prateek Bora <harshpb@linux.ibm.com>]

From: Ojaswin Mujoo <ojaswin@linux.ibm.com>

Moving the following instructions to decodetree specification :
isync

The changes were verified by validating that the tcg ops generated by
those instructions remain the same, which were captured with the '-d
in_asm,op' flag.

Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reviewed-by: Nikhil Kumar Singh <nikhilks@linux.ibm.com>
Reviewed-by: Glenn Miles <milesg@linux.ibm.com>
Reviewed-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Signed-off-by: Chinmay Rath <rathc@linux.ibm.com>
Tested-by: Aniket Sahu <asahu1x@linux.ibm.com>
Link: https://lore.kernel.org/qemu-devel/20260827133010.278889-14-rathc@linux.ibm.com
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
---
 target/ppc/insn32.decode                     |  1 +
 target/ppc/translate.c                       | 15 ---------------
 target/ppc/translate/storage-ctrl-impl.c.inc | 17 +++++++++++++++++
 3 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index e8326a9d0b..6fb7754566 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -1470,6 +1470,7 @@ MSGSYNC         011111 ----- ----- ----- 1101110110 -
 @X_sync         ...... .. l:3 ... sc:2 ..... .......... .           &X_sync
 SYNC            011111 -- ... --- ..   ----- 1001010110 -           @X_sync
 EIEIO           011111 ----- ----- ----- 1101010110 -
+ISYNC           010011 ----- ----- ----- 0010010110 -
 
 # Condition Register Field Instruction
 
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index c44cffb5e8..84589716b3 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -2727,20 +2727,6 @@ static inline void gen_check_tlb_flush(DisasContext *ctx, bool global)
 static inline void gen_check_tlb_flush(DisasContext *ctx, bool global) { }
 #endif
 
-/* isync */
-static void gen_isync(DisasContext *ctx)
-{
-    /*
-     * We need to check for a pending TLB flush. This can only happen in
-     * kernel mode however so check MSR_PR
-     */
-    if (!ctx->pr) {
-        gen_check_tlb_flush(ctx, false);
-    }
-    tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
-    ctx->base.is_jmp = DISAS_EXIT_UPDATE;
-}
-
 /* wait */
 static void gen_wait(DisasContext *ctx)
 {
@@ -5364,7 +5350,6 @@ GEN_HANDLER(lswi, 0x1F, 0x15, 0x12, 0x00000001, PPC_STRING),
 GEN_HANDLER(lswx, 0x1F, 0x15, 0x10, 0x00000001, PPC_STRING),
 GEN_HANDLER(stswi, 0x1F, 0x15, 0x16, 0x00000001, PPC_STRING),
 GEN_HANDLER(stswx, 0x1F, 0x15, 0x14, 0x00000001, PPC_STRING),
-GEN_HANDLER(isync, 0x13, 0x16, 0x04, 0x03FFF801, PPC_MEM),
 /* ISA v3.0 changed the extended opcode from 62 to 30 */
 GEN_HANDLER(wait, 0x1F, 0x1E, 0x01, 0x039FF801, PPC_WAIT),
 GEN_HANDLER_E(wait, 0x1F, 0x1E, 0x00, 0x039CF801, PPC_NONE, PPC2_ISA300),
diff --git a/target/ppc/translate/storage-ctrl-impl.c.inc b/target/ppc/translate/storage-ctrl-impl.c.inc
index b8b4454663..943229c438 100644
--- a/target/ppc/translate/storage-ctrl-impl.c.inc
+++ b/target/ppc/translate/storage-ctrl-impl.c.inc
@@ -155,6 +155,23 @@ static bool trans_SLBFEE(DisasContext *ctx, arg_SLBFEE *a)
     return true;
 }
 
+static bool trans_ISYNC(DisasContext *ctx, arg_ISYNC *a)
+{
+    REQUIRE_INSNS_FLAGS(ctx, MEM);
+
+    /*
+     * We need to check for a pending TLB flush. This can only happen in
+     * kernel mode however so check MSR_PR
+     */
+    if (!ctx->pr) {
+        gen_check_tlb_flush(ctx, false);
+    }
+    tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
+    ctx->base.is_jmp = DISAS_EXIT_UPDATE;
+
+    return true;
+}
+
 static bool trans_SLBSYNC(DisasContext *ctx, arg_SLBSYNC *a)
 {
     REQUIRE_64BIT(ctx);
-- 
2.52.0