}
}
+/* encode a logical immediate, mapping user parameter
+ M=set bits pattern length to S=M-1 */
+static inline unsigned int
+aarch64_limm(unsigned int m, unsigned int r)
+{
+ assert(m > 0);
+ return r << 16 | (m - 1) << 10;
+}
+
+/* test a register against an immediate bit pattern made of
+ M set bits rotated right by R.
+ Examples:
+ to test a 32/64 reg against 0x00000007, pass M = 3, R = 0.
+ to test a 32/64 reg against 0x000000ff, pass M = 8, R = 0.
+ to test a 32bit reg against 0xff000000, pass M = 8, R = 8.
+ to test a 32bit reg against 0xff0000ff, pass M = 16, R = 8.
+ */
+static inline void tcg_out_tst(TCGContext *s, int ext, TCGReg rn,
+ unsigned int m, unsigned int r)
+{
+ /* using TST alias of ANDS XZR, Xn,#bimm64 0x7200001f */
+ unsigned int base = ext ? 0xf240001f : 0x7200001f;
+ tcg_out32(s, base | aarch64_limm(m, r) | rn << 5);
+}
+
+/* and a register with a bit pattern, similarly to TST, no flags change */
+static inline void tcg_out_andi(TCGContext *s, int ext, TCGReg rd, TCGReg rn,
+ unsigned int m, unsigned int r)
+{
+ /* using AND 0x12000000 */
+ unsigned int base = ext ? 0x92400000 : 0x12000000;
+ tcg_out32(s, base | aarch64_limm(m, r) | rn << 5 | rd);
+}
+
static inline void tcg_out_ret(TCGContext *s)
{
/* emit RET { LR } */