tcg-ops.h: add rotl/rotli and rotr/rotri TCG instructions

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5607 c046a42c-6fe2-441c-8c8c-71466251a162

2 files changed, 127 insertions, 1 deletions

diff --git a/tcg/README b/tcg/README
index 3efef6028c..7e7c06b41c 100644
--- a/tcg/README
+++ b/tcg/README
@@ -225,7 +225,7 @@ t0=~(t1|t2)
 
 t0=t1|~t2
 
-********* Shifts
+********* Shifts/Rotates
 
 * shl_i32/i64 t0, t1, t2
 
@@ -239,6 +239,14 @@ t0=t1 >> t2 (unsigned). Undefined behavior if t2 < 0 or t2 >= 32 (resp 64)
 
 t0=t1 >> t2 (signed). Undefined behavior if t2 < 0 or t2 >= 32 (resp 64)
 
+* rotl_i32/i64 t0, t1, t2
+
+Rotation of t2 bits to the left. Undefined behavior if t2 < 0 or t2 >= 32 (resp 64)
+
+* rotr_i32/i64 t0, t1, t2
+
+Rotation of t2 bits to the right. Undefined behavior if t2 < 0 or t2 >= 32 (resp 64)
+
 ********* Misc
 
 * mov_i32/i64 t0, t1
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index f199ce0131..58af59cc25 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -1518,6 +1518,116 @@ static inline void tcg_gen_orc_i64(TCGv ret, TCGv arg1, TCGv arg2)
     tcg_temp_free(t0);
 }
 
+static inline void tcg_gen_rotl_i32(TCGv ret, TCGv arg1, TCGv arg2)
+{
+    TCGv t0, t1;
+
+    t0 = tcg_temp_new(TCG_TYPE_I32);
+    t1 = tcg_temp_new(TCG_TYPE_I32);
+    tcg_gen_shl_i32(t0, arg1, arg2);
+    tcg_gen_subfi_i32(t1, 32, arg2);
+    tcg_gen_shr_i32(t1, arg1, t1);
+    tcg_gen_or_i32(ret, t0, t1);
+    tcg_temp_free(t0);
+    tcg_temp_free(t1);
+}
+
+static inline void tcg_gen_rotl_i64(TCGv ret, TCGv arg1, TCGv arg2)
+{
+    TCGv t0, t1;
+
+    t0 = tcg_temp_new(TCG_TYPE_I64);
+    t1 = tcg_temp_new(TCG_TYPE_I64);
+    tcg_gen_shl_i64(t0, arg1, arg2);
+    tcg_gen_subfi_i64(t1, 64, arg2);
+    tcg_gen_shr_i64(t1, arg1, t1);
+    tcg_gen_or_i64(ret, t0, t1);
+    tcg_temp_free(t0);
+    tcg_temp_free(t1);
+}
+
+static inline void tcg_gen_rotli_i32(TCGv ret, TCGv arg1, int32_t arg2)
+{
+    /* some cases can be optimized here */
+    if (arg2 == 0) {
+        tcg_gen_mov_i32(ret, arg1);
+    } else {
+        TCGv t0, t1;
+        t0 = tcg_temp_new(TCG_TYPE_I32);
+        t1 = tcg_temp_new(TCG_TYPE_I32);
+        tcg_gen_shli_i32(t0, arg1, arg2);
+        tcg_gen_shri_i32(t1, arg1, 32 - arg2);
+        tcg_gen_or_i32(ret, t0, t1);
+        tcg_temp_free(t0);
+        tcg_temp_free(t1);
+    }
+}
+
+static inline void tcg_gen_rotli_i64(TCGv ret, TCGv arg1, int64_t arg2)
+{
+    /* some cases can be optimized here */
+    if (arg2 == 0) {
+        tcg_gen_mov_i64(ret, arg1);
+    } else {
+        TCGv t0, t1;
+        t0 = tcg_temp_new(TCG_TYPE_I64);
+        t1 = tcg_temp_new(TCG_TYPE_I64);
+        tcg_gen_shli_i64(t0, arg1, arg2);
+        tcg_gen_shri_i64(t1, arg1, 64 - arg2);
+        tcg_gen_or_i64(ret, t0, t1);
+        tcg_temp_free(t0);
+        tcg_temp_free(t1);
+    }
+}
+
+static inline void tcg_gen_rotr_i32(TCGv ret, TCGv arg1, TCGv arg2)
+{
+    TCGv t0, t1;
+
+    t0 = tcg_temp_new(TCG_TYPE_I32);
+    t1 = tcg_temp_new(TCG_TYPE_I32);
+    tcg_gen_shr_i32(t0, arg1, arg2);
+    tcg_gen_subfi_i32(t1, 32, arg2);
+    tcg_gen_shl_i32(t1, arg1, t1);
+    tcg_gen_or_i32(ret, t0, t1);
+    tcg_temp_free(t0);
+    tcg_temp_free(t1);
+}
+
+static inline void tcg_gen_rotr_i64(TCGv ret, TCGv arg1, TCGv arg2)
+{
+    TCGv t0, t1;
+
+    t0 = tcg_temp_new(TCG_TYPE_I64);
+    t1 = tcg_temp_new(TCG_TYPE_I64);
+    tcg_gen_shl_i64(t0, arg1, arg2);
+    tcg_gen_subfi_i64(t1, 64, arg2);
+    tcg_gen_shl_i64(t1, arg1, t1);
+    tcg_gen_or_i64(ret, t0, t1);
+    tcg_temp_free(t0);
+    tcg_temp_free(t1);
+}
+
+static inline void tcg_gen_rotri_i32(TCGv ret, TCGv arg1, int32_t arg2)
+{
+    /* some cases can be optimized here */
+    if (arg2 == 0) {
+        tcg_gen_mov_i32(ret, arg1);
+    } else {
+        tcg_gen_rotli_i32(ret, arg1, 32 - arg2);
+    }
+}
+
+static inline void tcg_gen_rotri_i64(TCGv ret, TCGv arg1, int64_t arg2)
+{
+    /* some cases can be optimized here */
+    if (arg2 == 0) {
+        tcg_gen_mov_i32(ret, arg1);
+    } else {
+        tcg_gen_rotli_i64(ret, arg1, 64 - arg2);
+    }
+}
+
 /***************************************/
 /* QEMU specific operations. Their type depend on the QEMU CPU
    type. */
@@ -1777,6 +1887,10 @@ static inline void tcg_gen_qemu_st64(TCGv arg, TCGv addr, int mem_index)
 #define tcg_gen_nand_tl tcg_gen_nand_i64
 #define tcg_gen_nor_tl tcg_gen_nor_i64
 #define tcg_gen_orc_tl tcg_gen_orc_i64
+#define tcg_gen_rotl_tl tcg_gen_rotl_i64
+#define tcg_gen_rotli_tl tcg_gen_rotli_i64
+#define tcg_gen_rotr_tl tcg_gen_rotr_i64
+#define tcg_gen_rotri_tl tcg_gen_rotri_i64
 #define tcg_const_tl tcg_const_i64
 #define tcg_const_local_tl tcg_const_local_i64
 #else
@@ -1836,6 +1950,10 @@ static inline void tcg_gen_qemu_st64(TCGv arg, TCGv addr, int mem_index)
 #define tcg_gen_nand_tl tcg_gen_nand_i32
 #define tcg_gen_nor_tl tcg_gen_nor_i32
 #define tcg_gen_orc_tl tcg_gen_orc_i32
+#define tcg_gen_rotl_tl tcg_gen_rotl_i32
+#define tcg_gen_rotli_tl tcg_gen_rotli_i32
+#define tcg_gen_rotr_tl tcg_gen_rotr_i32
+#define tcg_gen_rotri_tl tcg_gen_rotri_i32
 #define tcg_const_tl tcg_const_i32
 #define tcg_const_local_tl tcg_const_local_i32
 #endif