Patchwork [09/13] target-alpha: Update commentary for opcode 0x1A.

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Submitter Richard Henderson
Date March 29, 2010, 5:48 p.m.
Message ID <c65b33d9d8d8ec6f255e0007a3496a0a3604d0b4.1270680209.git.rth@twiddle.net>
Download mbox | patch
Permalink /patch/49662/
State New
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Comments

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

Patch

diff --git a/target-alpha/translate.c b/target-alpha/translate.c
index dfe55c3..2360a0e 100644
--- a/target-alpha/translate.c
+++ b/target-alpha/translate.c
@@ -2534,13 +2534,16 @@  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: