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[05/10] target-alpha: Update commentary for opcode 0x1A.

Message ID 610e07bf1f62694f92c4027cdf6fd4b9e00920ea.1271114639.git.rth@twiddle.net
State New
Headers show

Commit Message

Richard Henderson March 29, 2010, 5:48 p.m. UTC 
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 target-alpha/translate.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)
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Patch

diff --git a/target-alpha/translate.c b/target-alpha/translate.c
index 29152fa..2c29337 100644
--- a/target-alpha/translate.c
+++ b/target-alpha/translate.c
@@ -2535,13 +2535,16 @@  static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
         break;
 #endif
     case 0x1A:
-        if (rb != 31)
+        /* JMP, JSR, RET, JSR_COROUTINE.  These only differ by the branch
+           prediction stack action, which of course we don't implement.  */
+        if (rb != 31) {
             tcg_gen_andi_i64(cpu_pc, cpu_ir[rb], ~3);
-        else
+        } else {
             tcg_gen_movi_i64(cpu_pc, 0);
-        if (ra != 31)
+        }
+        if (ra != 31) {
             tcg_gen_movi_i64(cpu_ir[ra], ctx->pc);
-        /* Those four jumps only differ by the branch prediction hint */
+        }
         ret = EXIT_PC_UPDATED;
         break;
     case 0x1B: