[Qemu-devel] [PATCH 3/9] tcg: add bswap16_i64 and bswap32_i64 TCG ops

[Aurelien Jarno]

Signed-off-by: Aurelien Jarno <address@hidden>
---
 tcg/tcg-op.h  |   58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tcg/tcg-opc.h |    6 +++++
 2 files changed, 64 insertions(+), 0 deletions(-)

diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index fa0f01c..652a374 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -1300,6 +1300,18 @@ static inline void tcg_gen_ext_i32_i64(TCGv_i64 ret, 
TCGv_i32 arg)
     tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31);
 }
 
+/* Note: we assume the six high bytes are set to zero */
+static inline void tcg_gen_bswap16_i64(TCGv_i64 ret, TCGv_i64 arg)
+{
+    tcg_gen_bswap16_i32(TCGV_LOW(ret), TCGV_LOW(arg));
+}
+
+/* Note: we assume the four high bytes are set to zero */
+static inline void tcg_gen_bswap32_i64(TCGv_i64 ret, TCGv_i64 arg)
+{
+    tcg_gen_bswap32_i32(TCGV_LOW(ret), TCGV_LOW(arg));
+}
+
 static inline void tcg_gen_bswap64_i64(TCGv_i64 ret, TCGv_i64 arg)
 {
     TCGv_i32 t0, t1;
@@ -1381,6 +1393,52 @@ static inline void tcg_gen_ext_i32_i64(TCGv_i64 ret, 
TCGv_i32 arg)
     tcg_gen_ext32s_i64(ret, MAKE_TCGV_I64(GET_TCGV_I32(arg)));
 }
 
+/* Note: we assume the six high bytes are set to zero */
+static inline void tcg_gen_bswap16_i64(TCGv_i64 ret, TCGv_i64 arg)
+{
+#ifdef TCG_TARGET_HAS_bswap16_i64
+    tcg_gen_op2_i64(INDEX_op_bswap16_i64, ret, arg);
+#else
+    TCGv_i64 t0, t1;
+    t0 = tcg_temp_new_i64();
+    t1 = tcg_temp_new_i64();
+
+    tcg_gen_shri_i64(t0, arg, 8);
+    tcg_gen_andi_i64(t1, arg, 0x000000ff);
+    tcg_gen_shli_i64(t1, t1, 8);
+    tcg_gen_or_i64(ret, t0, t1);
+    tcg_temp_free_i64(t0);
+    tcg_temp_free_i64(t1);
+#endif
+}
+
+/* Note: we assume the four high bytes are set to zero */
+static inline void tcg_gen_bswap32_i64(TCGv_i64 ret, TCGv_i64 arg)
+{
+#ifdef TCG_TARGET_HAS_bswap32_i64
+    tcg_gen_op2_i64(INDEX_op_bswap32_i64, ret, arg);
+#else
+    TCGv_i64 t0, t1;
+    t0 = tcg_temp_new_i64();
+    t1 = tcg_temp_new_i64();
+
+    tcg_gen_shli_i64(t0, arg, 24);
+
+    tcg_gen_andi_i64(t1, arg, 0x0000ff00);
+    tcg_gen_shli_i64(t1, t1, 8);
+    tcg_gen_or_i64(t0, t0, t1);
+
+    tcg_gen_shri_i64(t1, arg, 8);
+    tcg_gen_andi_i64(t1, t1, 0x0000ff00);
+    tcg_gen_or_i64(t0, t0, t1);
+
+    tcg_gen_shri_i64(t1, arg, 24);
+    tcg_gen_or_i64(ret, t0, t1);
+    tcg_temp_free_i64(t0);
+    tcg_temp_free_i64(t1);
+#endif
+}
+
 static inline void tcg_gen_bswap64_i64(TCGv_i64 ret, TCGv_i64 arg)
 {
 #ifdef TCG_TARGET_HAS_bswap64_i64
diff --git a/tcg/tcg-opc.h b/tcg/tcg-opc.h
index b5fc197..3a095fc 100644
--- a/tcg/tcg-opc.h
+++ b/tcg/tcg-opc.h
@@ -152,6 +152,12 @@ DEF2(ext16s_i64, 1, 1, 0, 0)
 #ifdef TCG_TARGET_HAS_ext32s_i64
 DEF2(ext32s_i64, 1, 1, 0, 0)
 #endif
+#ifdef TCG_TARGET_HAS_bswap16_i64
+DEF2(bswap16_i64, 1, 1, 0, 0)
+#endif
+#ifdef TCG_TARGET_HAS_bswap32_i64
+DEF2(bswap32_i64, 1, 1, 0, 0)
+#endif
 #ifdef TCG_TARGET_HAS_bswap64_i64
 DEF2(bswap64_i64, 1, 1, 0, 0)
 #endif
-- 
1.6.1.3