On 8/20/25 04:21, Kohei Tokunaga wrote:
+static void tcg_wasm_out_bswap64(
+ TCGContext *s, TCGReg dest, TCGReg src)
+{
+ tcg_wasm_out_op_idx(s, OPC_GLOBAL_GET, REG_IDX(src));
+ tcg_wasm_out_op_const(s, OPC_I64_CONST, 32);
+ tcg_wasm_out_op(s, OPC_I64_ROTR);
+ tcg_wasm_out_op_idx(s, OPC_LOCAL_SET, TMP64_LOCAL_0_IDX);
+
+ tcg_wasm_out_op_idx(s, OPC_LOCAL_GET, TMP64_LOCAL_0_IDX);
+ tcg_wasm_out_op_const(s, OPC_I64_CONST, 0xff000000ff000000);
+ tcg_wasm_out_op(s, OPC_I64_AND);
+ tcg_wasm_out_op_const(s, OPC_I64_CONST, 24);
+ tcg_wasm_out_op(s, OPC_I64_SHR_U);
+
+ tcg_wasm_out_op_idx(s, OPC_LOCAL_GET, TMP64_LOCAL_0_IDX);
+ tcg_wasm_out_op_const(s, OPC_I64_CONST, 0x00ff000000ff0000);
+ tcg_wasm_out_op(s, OPC_I64_AND);
+ tcg_wasm_out_op_const(s, OPC_I64_CONST, 8);
+ tcg_wasm_out_op(s, OPC_I64_SHR_U);
+
+ tcg_wasm_out_op(s, OPC_I64_OR);
+
+ tcg_wasm_out_op_idx(s, OPC_LOCAL_GET, TMP64_LOCAL_0_IDX);
+ tcg_wasm_out_op_const(s, OPC_I64_CONST, 0x0000ff000000ff00);
+ tcg_wasm_out_op(s, OPC_I64_AND);
+ tcg_wasm_out_op_const(s, OPC_I64_CONST, 8);
+ tcg_wasm_out_op(s, OPC_I64_SHL);
+
+ tcg_wasm_out_op_idx(s, OPC_LOCAL_GET, TMP64_LOCAL_0_IDX);
+ tcg_wasm_out_op_const(s, OPC_I64_CONST, 0x000000ff000000ff);
+ tcg_wasm_out_op(s, OPC_I64_AND);
+ tcg_wasm_out_op_const(s, OPC_I64_CONST, 24);
+ tcg_wasm_out_op(s, OPC_I64_SHL);
+
+ tcg_wasm_out_op(s, OPC_I64_OR);
+
+ tcg_wasm_out_op(s, OPC_I64_OR);
+ tcg_wasm_out_op_idx(s, OPC_GLOBAL_SET, REG_IDX(dest));
+}
Is this any better than the default expansion?
r~
