tcg/ppc: Adjust constraints on qemu_ld/st

The softmmu tlb uses TCG_REG_{TMP1,TMP2,R0}, not any of the normally
available registers.  Now that we handle overlap betwen inputs and
helper arguments, we can allow any allocatable reg.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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

@@ -12,18 +12,15 @@
 C_O0_I1(r)
 C_O0_I2(r, r)
 C_O0_I2(r, ri)
-C_O0_I2(S, S)
 C_O0_I2(v, r)
-C_O0_I3(S, S, S)
+C_O0_I3(r, r, r)
 C_O0_I4(r, r, ri, ri)
-C_O0_I4(S, S, S, S)
-C_O1_I1(r, L)
+C_O0_I4(r, r, r, r)
 C_O1_I1(r, r)
 C_O1_I1(v, r)
 C_O1_I1(v, v)
 C_O1_I1(v, vr)
 C_O1_I2(r, 0, rZ)
-C_O1_I2(r, L, L)
 C_O1_I2(r, rI, ri)
 C_O1_I2(r, rI, rT)
 C_O1_I2(r, r, r)
@@ -36,7 +33,7 @@ C_O1_I2(v, v, v)
 C_O1_I3(v, v, v, v)
 C_O1_I4(r, r, ri, rZ, rZ)
 C_O1_I4(r, r, r, ri, ri)
-C_O2_I1(L, L, L)
-C_O2_I2(L, L, L, L)
+C_O2_I1(r, r, r)
+C_O2_I2(r, r, r, r)
 C_O2_I4(r, r, rI, rZM, r, r)
 C_O2_I4(r, r, r, r, rI, rZM)

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

@@ -14,8 +14,6 @@ REGS('A', 1u << TCG_REG_R3)
 REGS('B', 1u << TCG_REG_R4)
 REGS('C', 1u << TCG_REG_R5)
 REGS('D', 1u << TCG_REG_R6)
-REGS('L', ALL_QLOAD_REGS)
-REGS('S', ALL_QSTORE_REGS)
 
 /*
  * Define constraint letters for constants:

tcg/ppc/tcg-target.c.inc

@@ -93,18 +93,6 @@
 #define ALL_GENERAL_REGS  0xffffffffu
 #define ALL_VECTOR_REGS   0xffffffff00000000ull
 
-#ifdef CONFIG_SOFTMMU
-#define ALL_QLOAD_REGS \
-    (ALL_GENERAL_REGS & \
-     ~((1 << TCG_REG_R3) | (1 << TCG_REG_R4) | (1 << TCG_REG_R5)))
-#define ALL_QSTORE_REGS \
-    (ALL_GENERAL_REGS & ~((1 << TCG_REG_R3) | (1 << TCG_REG_R4) | \
-                          (1 << TCG_REG_R5) | (1 << TCG_REG_R6)))
-#else
-#define ALL_QLOAD_REGS  (ALL_GENERAL_REGS & ~(1 << TCG_REG_R3))
-#define ALL_QSTORE_REGS ALL_QLOAD_REGS
-#endif
-
 TCGPowerISA have_isa;
 static bool have_isel;
 bool have_altivec;
@@ -3754,23 +3742,23 @@ static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op)
 
     case INDEX_op_qemu_ld_i32:
         return (TCG_TARGET_REG_BITS == 64 || TARGET_LONG_BITS == 32
-                ? C_O1_I1(r, L)
-                : C_O1_I2(r, L, L));
+                ? C_O1_I1(r, r)
+                : C_O1_I2(r, r, r));
 
     case INDEX_op_qemu_st_i32:
         return (TCG_TARGET_REG_BITS == 64 || TARGET_LONG_BITS == 32
-                ? C_O0_I2(S, S)
-                : C_O0_I3(S, S, S));
+                ? C_O0_I2(r, r)
+                : C_O0_I3(r, r, r));
 
     case INDEX_op_qemu_ld_i64:
-        return (TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, L)
-                : TARGET_LONG_BITS == 32 ? C_O2_I1(L, L, L)
-                : C_O2_I2(L, L, L, L));
+        return (TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, r)
+                : TARGET_LONG_BITS == 32 ? C_O2_I1(r, r, r)
+                : C_O2_I2(r, r, r, r));
 
     case INDEX_op_qemu_st_i64:
-        return (TCG_TARGET_REG_BITS == 64 ? C_O0_I2(S, S)
-                : TARGET_LONG_BITS == 32 ? C_O0_I3(S, S, S)
-                : C_O0_I4(S, S, S, S));
+        return (TCG_TARGET_REG_BITS == 64 ? C_O0_I2(r, r)
+                : TARGET_LONG_BITS == 32 ? C_O0_I3(r, r, r)
+                : C_O0_I4(r, r, r, r));
 
     case INDEX_op_add_vec:
     case INDEX_op_sub_vec: