diff mbox series

[v3,14/30] tcg/loongarch64: Implement bswap{16,32,64} ops

Message ID 20210922180927.666273-15-git@xen0n.name (mailing list archive)
State New, archived
Headers show
Series LoongArch64 port of QEMU TCG | expand

Commit Message

WANG Xuerui Sept. 22, 2021, 6:09 p.m. UTC 
Signed-off-by: WANG Xuerui <git@xen0n.name>
---
 tcg/loongarch64/tcg-target.c.inc | 32 ++++++++++++++++++++++++++++++++
 tcg/loongarch64/tcg-target.h     | 10 +++++-----
 2 files changed, 37 insertions(+), 5 deletions(-)

Comments

Richard Henderson Sept. 22, 2021, 6:23 p.m. UTC | #1 
On 9/22/21 11:09 AM, WANG Xuerui wrote:
> Signed-off-by: WANG Xuerui<git@xen0n.name>
> ---
>   tcg/loongarch64/tcg-target.c.inc | 32 ++++++++++++++++++++++++++++++++
>   tcg/loongarch64/tcg-target.h     | 10 +++++-----
>   2 files changed, 37 insertions(+), 5 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
diff mbox series

Patch

diff --git a/tcg/loongarch64/tcg-target.c.inc b/tcg/loongarch64/tcg-target.c.inc
index 938de8fe6f..be12cab2e3 100644
--- a/tcg/loongarch64/tcg-target.c.inc
+++ b/tcg/loongarch64/tcg-target.c.inc
@@ -497,6 +497,33 @@  static void tcg_out_op(TCGContext *s, TCGOpcode opc,
         tcg_out_opc_bstrins_d(s, a0, a2, args[3], args[3] + args[4] - 1);
         break;
 
+    case INDEX_op_bswap16_i32:
+    case INDEX_op_bswap16_i64:
+        tcg_out_opc_revb_2h(s, a0, a1);
+        if (a2 & TCG_BSWAP_OS) {
+            tcg_out_ext16s(s, a0, a0);
+        } else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) {
+            tcg_out_ext16u(s, a0, a0);
+        }
+        break;
+
+    case INDEX_op_bswap32_i32:
+        /* All 32-bit values are computed sign-extended in the register.  */
+        a2 = TCG_BSWAP_OS;
+        /* fallthrough */
+    case INDEX_op_bswap32_i64:
+        tcg_out_opc_revb_2w(s, a0, a1);
+        if (a2 & TCG_BSWAP_OS) {
+            tcg_out_ext32s(s, a0, a0);
+        } else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) {
+            tcg_out_ext32u(s, a0, a0);
+        }
+        break;
+
+    case INDEX_op_bswap64_i64:
+        tcg_out_opc_revb_d(s, a0, a1);
+        break;
+
     case INDEX_op_mov_i32:  /* Always emitted via tcg_out_mov.  */
     case INDEX_op_mov_i64:
     default:
@@ -528,6 +555,11 @@  static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op)
     case INDEX_op_not_i64:
     case INDEX_op_extract_i32:
     case INDEX_op_extract_i64:
+    case INDEX_op_bswap16_i32:
+    case INDEX_op_bswap16_i64:
+    case INDEX_op_bswap32_i32:
+    case INDEX_op_bswap32_i64:
+    case INDEX_op_bswap64_i64:
         return C_O1_I1(r, r);
 
     case INDEX_op_andc_i32:
diff --git a/tcg/loongarch64/tcg-target.h b/tcg/loongarch64/tcg-target.h
index 06a8f22792..cee457737a 100644
--- a/tcg/loongarch64/tcg-target.h
+++ b/tcg/loongarch64/tcg-target.h
@@ -111,8 +111,8 @@  typedef enum {
 #define TCG_TARGET_HAS_ext16s_i32       1
 #define TCG_TARGET_HAS_ext8u_i32        1
 #define TCG_TARGET_HAS_ext16u_i32       1
-#define TCG_TARGET_HAS_bswap16_i32      0
-#define TCG_TARGET_HAS_bswap32_i32      0
+#define TCG_TARGET_HAS_bswap16_i32      1
+#define TCG_TARGET_HAS_bswap32_i32      1
 #define TCG_TARGET_HAS_not_i32          1
 #define TCG_TARGET_HAS_neg_i32          0
 #define TCG_TARGET_HAS_andc_i32         1
@@ -146,9 +146,9 @@  typedef enum {
 #define TCG_TARGET_HAS_ext8u_i64        1
 #define TCG_TARGET_HAS_ext16u_i64       1
 #define TCG_TARGET_HAS_ext32u_i64       1
-#define TCG_TARGET_HAS_bswap16_i64      0
-#define TCG_TARGET_HAS_bswap32_i64      0
-#define TCG_TARGET_HAS_bswap64_i64      0
+#define TCG_TARGET_HAS_bswap16_i64      1
+#define TCG_TARGET_HAS_bswap32_i64      1
+#define TCG_TARGET_HAS_bswap64_i64      1
 #define TCG_TARGET_HAS_not_i64          1
 #define TCG_TARGET_HAS_neg_i64          0
 #define TCG_TARGET_HAS_andc_i64         1