[Qemu-devel] [PATCH 5/5] tcg-sparc: Implement ext32[su]_i64

[Richard Henderson]

The 32-bit right-shift instructions is defined to extend the shifted
output to 64-bits.  A shift count of zero therefore is a simple
extension without actually shifting.

Signed-off-by: Richard Henderson <address@hidden>
---
 tcg/sparc/tcg-target.c |   16 ++++++++++++++++
 tcg/sparc/tcg-target.h |    5 +++++
 2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index 1bef2fb..bc28f43 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -1238,6 +1238,20 @@ static inline void tcg_out_op(TCGContext *s, int opc, 
const TCGArg *args,
                        ARITH_MULX);
         tcg_out_arith(s, args[0], args[1], TCG_REG_I5, ARITH_SUB);
         break;
+    case INDEX_op_ext32s_i64:
+        if (const_args[1]) {
+            tcg_out_movi(s, TCG_TYPE_I64, args[0], (int32_t)args[1]);
+        } else {
+            tcg_out_arithi(s, args[0], args[1], 0, SHIFT_SRA);
+        }
+        break;
+    case INDEX_op_ext32u_i64:
+        if (const_args[1]) {
+            tcg_out_movi_imm32(s, args[0], args[1]);
+        } else {
+            tcg_out_arithi(s, args[0], args[1], 0, SHIFT_SRL);
+        }
+        break;
 
     case INDEX_op_brcond_i64:
         tcg_out_brcond_i64(s, args[2], args[0], args[1], const_args[1],
@@ -1344,6 +1358,8 @@ static const TCGTargetOpDef sparc_op_defs[] = {
     { INDEX_op_shl_i64, { "r", "r", "rJ" } },
     { INDEX_op_shr_i64, { "r", "r", "rJ" } },
     { INDEX_op_sar_i64, { "r", "r", "rJ" } },
+    { INDEX_op_ext32s_i64, { "r", "ri" } },
+    { INDEX_op_ext32u_i64, { "r", "ri" } },
 
     { INDEX_op_brcond_i64, { "r", "rJ" } },
 #endif
diff --git a/tcg/sparc/tcg-target.h b/tcg/sparc/tcg-target.h
index e00707b..d27ed5a 100644
--- a/tcg/sparc/tcg-target.h
+++ b/tcg/sparc/tcg-target.h
@@ -91,6 +91,11 @@ enum {
 #define TCG_TARGET_HAS_div_i32
 #define TCG_TARGET_HAS_div_i64
 
+#if TCG_TARGET_REG_BITS == 64
+#define TCG_TARGET_HAS_ext32s_i64
+#define TCG_TARGET_HAS_ext32u_i64
+#endif
+
 //#define TCG_TARGET_HAS_bswap32_i32
 //#define TCG_TARGET_HAS_bswap64_i64
 //#define TCG_TARGET_HAS_neg_i32
-- 
1.6.5.2