tcg/riscv: Use 'z' constraint

Replace target-specific 'Z' with generic 'z'.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

tcg/riscv/tcg-target-con-set.h

@@ -10,17 +10,17 @@
  * tcg-target-con-str.h; the constraint combination is inclusive or.
  */
 C_O0_I1(r)
-C_O0_I2(rZ, r)
-C_O0_I2(rZ, rZ)
+C_O0_I2(rz, r)
+C_O0_I2(rz, rz)
 C_O1_I1(r, r)
 C_O1_I2(r, r, ri)
 C_O1_I2(r, r, rI)
 C_O1_I2(r, r, rJ)
-C_O1_I2(r, rZ, rN)
-C_O1_I2(r, rZ, rZ)
+C_O1_I2(r, rz, rN)
+C_O1_I2(r, rz, rz)
 C_N1_I2(r, r, rM)
 C_O1_I4(r, r, rI, rM, rM)
-C_O2_I4(r, r, rZ, rZ, rM, rM)
+C_O2_I4(r, r, rz, rz, rM, rM)
 C_O0_I2(v, r)
 C_O1_I1(v, r)
 C_O1_I1(v, v)

tcg/riscv/tcg-target-con-str.h

@@ -21,4 +21,3 @@ CONST('K', TCG_CT_CONST_S5)
 CONST('L', TCG_CT_CONST_CMP_VI)
 CONST('N', TCG_CT_CONST_N12)
 CONST('M', TCG_CT_CONST_M12)
-CONST('Z', TCG_CT_CONST_ZERO)

tcg/riscv/tcg-target.c.inc

@@ -112,13 +112,12 @@ static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
     return TCG_REG_A0 + slot;
 }
 
-#define TCG_CT_CONST_ZERO    0x100
-#define TCG_CT_CONST_S12     0x200
-#define TCG_CT_CONST_N12     0x400
-#define TCG_CT_CONST_M12     0x800
-#define TCG_CT_CONST_J12    0x1000
-#define TCG_CT_CONST_S5     0x2000
-#define TCG_CT_CONST_CMP_VI 0x4000
+#define TCG_CT_CONST_S12     0x100
+#define TCG_CT_CONST_N12     0x200
+#define TCG_CT_CONST_M12     0x400
+#define TCG_CT_CONST_J12     0x800
+#define TCG_CT_CONST_S5     0x1000
+#define TCG_CT_CONST_CMP_VI 0x2000
 
 #define ALL_GENERAL_REGS   MAKE_64BIT_MASK(0, 32)
 #define ALL_VECTOR_REGS    MAKE_64BIT_MASK(32, 32)
@@ -391,9 +390,6 @@ static bool tcg_target_const_match(int64_t val, int ct,
     if (ct & TCG_CT_CONST) {
         return 1;
     }
-    if ((ct & TCG_CT_CONST_ZERO) && val == 0) {
-        return 1;
-    }
     if (type >= TCG_TYPE_V64) {
         /* Val is replicated by VECE; extract the highest element. */
         val >>= (-8 << vece) & 63;
@@ -2681,7 +2677,7 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
     case INDEX_op_st16_i64:
     case INDEX_op_st32_i64:
     case INDEX_op_st_i64:
-        return C_O0_I2(rZ, r);
+        return C_O0_I2(rz, r);
 
     case INDEX_op_add_i32:
     case INDEX_op_and_i32:
@@ -2707,7 +2703,7 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
 
     case INDEX_op_sub_i32:
     case INDEX_op_sub_i64:
-        return C_O1_I2(r, rZ, rN);
+        return C_O1_I2(r, rz, rN);
 
     case INDEX_op_mul_i32:
     case INDEX_op_mulsh_i32:
@@ -2723,7 +2719,7 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
     case INDEX_op_divu_i64:
     case INDEX_op_rem_i64:
     case INDEX_op_remu_i64:
-        return C_O1_I2(r, rZ, rZ);
+        return C_O1_I2(r, rz, rz);
 
     case INDEX_op_shl_i32:
     case INDEX_op_shr_i32:
@@ -2745,7 +2741,7 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
 
     case INDEX_op_brcond_i32:
     case INDEX_op_brcond_i64:
-        return C_O0_I2(rZ, rZ);
+        return C_O0_I2(rz, rz);
 
     case INDEX_op_movcond_i32:
     case INDEX_op_movcond_i64:
@@ -2755,14 +2751,14 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
     case INDEX_op_add2_i64:
     case INDEX_op_sub2_i32:
     case INDEX_op_sub2_i64:
-        return C_O2_I4(r, r, rZ, rZ, rM, rM);
+        return C_O2_I4(r, r, rz, rz, rM, rM);
 
     case INDEX_op_qemu_ld_i32:
     case INDEX_op_qemu_ld_i64:
         return C_O1_I1(r, r);
     case INDEX_op_qemu_st_i32:
     case INDEX_op_qemu_st_i64:
-        return C_O0_I2(rZ, r);
+        return C_O0_I2(rz, r);
 
     case INDEX_op_st_vec:
         return C_O0_I2(v, r);