[Qemu-devel] [PATCH v2 16/17] target-alpha: Raise IOV from CVTQL

[Richard Henderson <rth@twiddle.net>]

Even if an exception isn't taken, the status flags need updating
and the result should be written to the destination.  Move the body
of cvtql out of line, since we now always need a call.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 target-alpha/fpu_helper.c |  8 ++++++--
 target-alpha/helper.h     |  3 ++-
 target-alpha/translate.c  | 34 +++++-----------------------------
 3 files changed, 13 insertions(+), 32 deletions(-)

diff --git a/target-alpha/fpu_helper.c b/target-alpha/fpu_helper.c
index fa4401d..b091aa8 100644
--- a/target-alpha/fpu_helper.c
+++ b/target-alpha/fpu_helper.c
@@ -539,9 +539,13 @@ uint64_t helper_cvtqt(CPUAlphaState *env, uint64_t a)
     return float64_to_t(fr);
 }
 
-void helper_cvtql_v_input(CPUAlphaState *env, uint64_t val)
+uint64_t helper_cvtql(CPUAlphaState *env, uint64_t val)
 {
+    uint32_t exc = 0;
     if (val != (int32_t)val) {
-        arith_excp(env, GETPC(), EXC_M_IOV, 0);
+        exc = FPCR_IOV | FPCR_INE;
     }
+    env->error_code = exc;
+
+    return ((val & 0xc0000000) << 32) | ((val & 0x3fffffff) << 29);
 }
diff --git a/target-alpha/helper.h b/target-alpha/helper.h
index 780b0dc..d221f0d 100644
--- a/target-alpha/helper.h
+++ b/target-alpha/helper.h
@@ -79,6 +79,8 @@ DEF_HELPER_FLAGS_2(cvtqg, TCG_CALL_NO_RWG, i64, env, i64)
 DEF_HELPER_FLAGS_2(cvttq, TCG_CALL_NO_RWG, i64, env, i64)
 DEF_HELPER_FLAGS_2(cvttq_c, TCG_CALL_NO_RWG, i64, env, i64)
 
+DEF_HELPER_FLAGS_2(cvtql, TCG_CALL_NO_RWG, i64, env, i64)
+
 DEF_HELPER_FLAGS_2(setroundmode, TCG_CALL_NO_RWG, void, env, i32)
 DEF_HELPER_FLAGS_2(setflushzero, TCG_CALL_NO_RWG, void, env, i32)
 DEF_HELPER_FLAGS_3(fp_exc_raise, TCG_CALL_NO_WG, void, env, i32, i32)
@@ -87,7 +89,6 @@ DEF_HELPER_FLAGS_3(fp_exc_raise_s, TCG_CALL_NO_WG, void, env, i32, i32)
 DEF_HELPER_FLAGS_2(ieee_input, TCG_CALL_NO_WG, void, env, i64)
 DEF_HELPER_FLAGS_2(ieee_input_cmp, TCG_CALL_NO_WG, void, env, i64)
 DEF_HELPER_FLAGS_2(ieee_input_s, TCG_CALL_NO_WG, void, env, i64)
-DEF_HELPER_FLAGS_2(cvtql_v_input, TCG_CALL_NO_WG, void, env, i64)
 
 #if !defined (CONFIG_USER_ONLY)
 DEF_HELPER_2(hw_ret, void, env, i64)
diff --git a/target-alpha/translate.c b/target-alpha/translate.c
index 4c441a9..e9927b5 100644
--- a/target-alpha/translate.c
+++ b/target-alpha/translate.c
@@ -720,19 +720,6 @@ static void gen_cvtlq(TCGv vc, TCGv vb)
     tcg_temp_free(tmp);
 }
 
-static void gen_cvtql(TCGv vc, TCGv vb)
-{
-    TCGv tmp = tcg_temp_new();
-
-    tcg_gen_andi_i64(tmp, vb, (int32_t)0xc0000000);
-    tcg_gen_andi_i64(vc, vb, 0x3FFFFFFF);
-    tcg_gen_shli_i64(tmp, tmp, 32);
-    tcg_gen_shli_i64(vc, vc, 29);
-    tcg_gen_or_i64(vc, vc, tmp);
-
-    tcg_temp_free(tmp);
-}
-
 static void gen_ieee_arith2(DisasContext *ctx,
                             void (*helper)(TCGv, TCGv_ptr, TCGv),
                             int rb, int rc, int fn11)
@@ -2254,25 +2241,14 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
             /* FCMOVGT */
             gen_fcmov(ctx, TCG_COND_GT, ra, rb, rc);
             break;
-        case 0x030:
-            /* CVTQL */
-            REQUIRE_REG_31(ra);
-            vc = dest_fpr(ctx, rc);
-            vb = load_fpr(ctx, rb);
-            gen_cvtql(vc, vb);
-            break;
-        case 0x130:
-            /* CVTQL/V */
-        case 0x530:
-            /* CVTQL/SV */
+        case 0x030: /* CVTQL */
+        case 0x130: /* CVTQL/V */
+        case 0x530: /* CVTQL/SV */
             REQUIRE_REG_31(ra);
-            /* ??? I'm pretty sure there's nothing that /sv needs to do that
-               /v doesn't do.  The only thing I can think is that /sv is a
-               valid instruction merely for completeness in the ISA.  */
             vc = dest_fpr(ctx, rc);
             vb = load_fpr(ctx, rb);
-            gen_helper_cvtql_v_input(cpu_env, vb);
-            gen_cvtql(vc, vb);
+            gen_helper_cvtql(vc, cpu_env, vb);
+            gen_fp_exc_raise(rc, fn11);
             break;
         default:
             goto invalid_opc;
-- 
2.1.0