[PATCH v2 23/54] tcg/mips: Rationalize args to tcg_out_qemu_{ld,st}

[Richard Henderson]

Interpret the variable argument placement in the caller.
Mark the argument registers const, because they must be passed to
add_qemu_ldst_label unmodified.  There are several places where we
already convert back from bool to type.  Clean things up by using
type throughout.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/mips/tcg-target.c.inc | 188 ++++++++++++++++++++------------------
 1 file changed, 97 insertions(+), 91 deletions(-)

diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc
index a83ebe8729..ee5826c2b5 100644
--- a/tcg/mips/tcg-target.c.inc
+++ b/tcg/mips/tcg-target.c.inc
@@ -1479,7 +1479,7 @@ static bool tcg_out_qemu_st_slow_path(TCGContext *s, 
TCGLabelQemuLdst *l)
 #endif /* SOFTMMU */
 
 static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg lo, TCGReg hi,
-                                   TCGReg base, MemOp opc, bool is_64)
+                                   TCGReg base, MemOp opc, TCGType type)
 {
     switch (opc & (MO_SSIZE | MO_BSWAP)) {
     case MO_UB:
@@ -1503,7 +1503,7 @@ static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg 
lo, TCGReg hi,
         tcg_out_opc_imm(s, OPC_LH, lo, base, 0);
         break;
     case MO_UL | MO_BSWAP:
-        if (TCG_TARGET_REG_BITS == 64 && is_64) {
+        if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I64) {
             if (use_mips32r2_instructions) {
                 tcg_out_opc_imm(s, OPC_LWU, lo, base, 0);
                 tcg_out_bswap32(s, lo, lo, TCG_BSWAP_IZ | TCG_BSWAP_OZ);
@@ -1528,7 +1528,7 @@ static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg 
lo, TCGReg hi,
         }
         break;
     case MO_UL:
-        if (TCG_TARGET_REG_BITS == 64 && is_64) {
+        if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I64) {
             tcg_out_opc_imm(s, OPC_LWU, lo, base, 0);
             break;
         }
@@ -1583,7 +1583,7 @@ static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg 
lo, TCGReg hi,
 }
 
 static void tcg_out_qemu_ld_unalign(TCGContext *s, TCGReg lo, TCGReg hi,
-                                    TCGReg base, MemOp opc, bool is_64)
+                                    TCGReg base, MemOp opc, TCGType type)
 {
     const MIPSInsn lw1 = MIPS_BE ? OPC_LWL : OPC_LWR;
     const MIPSInsn lw2 = MIPS_BE ? OPC_LWR : OPC_LWL;
@@ -1623,7 +1623,7 @@ static void tcg_out_qemu_ld_unalign(TCGContext *s, TCGReg 
lo, TCGReg hi,
     case MO_UL:
         tcg_out_opc_imm(s, lw1, lo, base, 0);
         tcg_out_opc_imm(s, lw2, lo, base, 3);
-        if (TCG_TARGET_REG_BITS == 64 && is_64 && !sgn) {
+        if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I64 && !sgn) {
             tcg_out_ext32u(s, lo, lo);
         }
         break;
@@ -1634,18 +1634,18 @@ static void tcg_out_qemu_ld_unalign(TCGContext *s, 
TCGReg lo, TCGReg hi,
             tcg_out_opc_imm(s, lw1, lo, base, 0);
             tcg_out_opc_imm(s, lw2, lo, base, 3);
             tcg_out_bswap32(s, lo, lo,
-                            TCG_TARGET_REG_BITS == 64 && is_64
+                            TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I64
                             ? (sgn ? TCG_BSWAP_OS : TCG_BSWAP_OZ) : 0);
         } else {
             const tcg_insn_unit *subr =
-                (TCG_TARGET_REG_BITS == 64 && is_64 && !sgn
+                (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I64 && !sgn
                  ? bswap32u_addr : bswap32_addr);
 
             tcg_out_opc_imm(s, lw1, TCG_TMP0, base, 0);
             tcg_out_bswap_subr(s, subr);
             /* delay slot */
             tcg_out_opc_imm(s, lw2, TCG_TMP0, base, 3);
-            tcg_out_mov(s, is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32, lo, TCG_TMP3);
+            tcg_out_mov(s, type, lo, TCG_TMP3);
         }
         break;
 
@@ -1702,68 +1702,60 @@ static void tcg_out_qemu_ld_unalign(TCGContext *s, 
TCGReg lo, TCGReg hi,
     }
 }
 
-static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64)
+static void tcg_out_qemu_ld(TCGContext *s,
+                            const TCGReg datalo, const TCGReg datahi,
+                            const TCGReg addrlo, const TCGReg addrhi,
+                            const MemOpIdx oi, TCGType data_type)
 {
-    TCGReg addr_regl, addr_regh __attribute__((unused));
-    TCGReg data_regl, data_regh;
-    MemOpIdx oi;
-    MemOp opc;
-#if defined(CONFIG_SOFTMMU)
-    tcg_insn_unit *label_ptr[2];
-#else
-#endif
-    unsigned a_bits, s_bits;
-    TCGReg base = TCG_REG_A0;
-
-    data_regl = *args++;
-    data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0);
-    addr_regl = *args++;
-    addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0);
-    oi = *args++;
-    opc = get_memop(oi);
-    a_bits = get_alignment_bits(opc);
-    s_bits = opc & MO_SIZE;
+    MemOp opc = get_memop(oi);
+    unsigned a_bits = get_alignment_bits(opc);
+    unsigned s_bits = opc & MO_SIZE;
+    TCGReg base;
 
     /*
      * R6 removes the left/right instructions but requires the
      * system to support misaligned memory accesses.
      */
 #if defined(CONFIG_SOFTMMU)
-    tcg_out_tlb_load(s, base, addr_regl, addr_regh, oi, label_ptr, 1);
+    tcg_insn_unit *label_ptr[2];
+
+    base = TCG_REG_A0;
+    tcg_out_tlb_load(s, base, addrlo, addrhi, oi, label_ptr, 1);
     if (use_mips32r6_instructions || a_bits >= s_bits) {
-        tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64);
+        tcg_out_qemu_ld_direct(s, datalo, datahi, base, opc, data_type);
     } else {
-        tcg_out_qemu_ld_unalign(s, data_regl, data_regh, base, opc, is_64);
+        tcg_out_qemu_ld_unalign(s, datalo, datahi, base, opc, data_type);
     }
-    add_qemu_ldst_label(s, 1, oi,
-                        (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32),
-                        data_regl, data_regh, addr_regl, addr_regh,
-                        s->code_ptr, label_ptr);
+    add_qemu_ldst_label(s, true, oi, data_type, datalo, datahi,
+                        addrlo, addrhi, s->code_ptr, label_ptr);
 #else
+    base = addrlo;
     if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
-        tcg_out_ext32u(s, base, addr_regl);
-        addr_regl = base;
+        tcg_out_ext32u(s, TCG_REG_A0, base);
+        base = TCG_REG_A0;
     }
-    if (guest_base == 0 && data_regl != addr_regl) {
-        base = addr_regl;
-    } else if (guest_base == (int16_t)guest_base) {
-        tcg_out_opc_imm(s, ALIAS_PADDI, base, addr_regl, guest_base);
-    } else {
-        tcg_out_opc_reg(s, ALIAS_PADD, base, TCG_GUEST_BASE_REG, addr_regl);
+    if (guest_base) {
+        if (guest_base == (int16_t)guest_base) {
+            tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_A0, base, guest_base);
+        } else {
+            tcg_out_opc_reg(s, ALIAS_PADD, TCG_REG_A0, base,
+                            TCG_GUEST_BASE_REG);
+        }
+        base = TCG_REG_A0;
     }
     if (use_mips32r6_instructions) {
         if (a_bits) {
-            tcg_out_test_alignment(s, true, addr_regl, addr_regh, a_bits);
+            tcg_out_test_alignment(s, true, addrlo, addrhi, a_bits);
         }
-        tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64);
+        tcg_out_qemu_ld_direct(s, datalo, datahi, base, opc, data_type);
     } else {
         if (a_bits && a_bits != s_bits) {
-            tcg_out_test_alignment(s, true, addr_regl, addr_regh, a_bits);
+            tcg_out_test_alignment(s, true, addrlo, addrhi, a_bits);
         }
         if (a_bits >= s_bits) {
-            tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64);
+            tcg_out_qemu_ld_direct(s, datalo, datahi, base, opc, data_type);
         } else {
-            tcg_out_qemu_ld_unalign(s, data_regl, data_regh, base, opc, is_64);
+            tcg_out_qemu_ld_unalign(s, datalo, datahi, base, opc, data_type);
         }
     }
 #endif
@@ -1902,67 +1894,61 @@ static void tcg_out_qemu_st_unalign(TCGContext *s, 
TCGReg lo, TCGReg hi,
         g_assert_not_reached();
     }
 }
-static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64)
-{
-    TCGReg addr_regl, addr_regh __attribute__((unused));
-    TCGReg data_regl, data_regh;
-    MemOpIdx oi;
-    MemOp opc;
-#if defined(CONFIG_SOFTMMU)
-    tcg_insn_unit *label_ptr[2];
-#endif
-    unsigned a_bits, s_bits;
-    TCGReg base = TCG_REG_A0;
 
-    data_regl = *args++;
-    data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0);
-    addr_regl = *args++;
-    addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0);
-    oi = *args++;
-    opc = get_memop(oi);
-    a_bits = get_alignment_bits(opc);
-    s_bits = opc & MO_SIZE;
+static void tcg_out_qemu_st(TCGContext *s,
+                            const TCGReg datalo, const TCGReg datahi,
+                            const TCGReg addrlo, const TCGReg addrhi,
+                            const MemOpIdx oi, TCGType data_type)
+{
+    MemOp opc = get_memop(oi);
+    unsigned a_bits = get_alignment_bits(opc);
+    unsigned s_bits = opc & MO_SIZE;
+    TCGReg base;
 
     /*
      * R6 removes the left/right instructions but requires the
      * system to support misaligned memory accesses.
      */
 #if defined(CONFIG_SOFTMMU)
-    tcg_out_tlb_load(s, base, addr_regl, addr_regh, oi, label_ptr, 0);
+    tcg_insn_unit *label_ptr[2];
+
+    base = TCG_REG_A0;
+    tcg_out_tlb_load(s, base, addrlo, addrhi, oi, label_ptr, 0);
     if (use_mips32r6_instructions || a_bits >= s_bits) {
-        tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
+        tcg_out_qemu_st_direct(s, datalo, datahi, base, opc);
     } else {
-        tcg_out_qemu_st_unalign(s, data_regl, data_regh, base, opc);
+        tcg_out_qemu_st_unalign(s, datalo, datahi, base, opc);
     }
-    add_qemu_ldst_label(s, 0, oi,
-                        (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32),
-                        data_regl, data_regh, addr_regl, addr_regh,
-                        s->code_ptr, label_ptr);
+    add_qemu_ldst_label(s, false, oi, data_type, datalo, datahi,
+                        addrlo, addrhi, s->code_ptr, label_ptr);
 #else
+    base = addrlo;
     if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
-        tcg_out_ext32u(s, base, addr_regl);
-        addr_regl = base;
+        tcg_out_ext32u(s, TCG_REG_A0, base);
+        base = TCG_REG_A0;
     }
-    if (guest_base == 0) {
-        base = addr_regl;
-    } else if (guest_base == (int16_t)guest_base) {
-        tcg_out_opc_imm(s, ALIAS_PADDI, base, addr_regl, guest_base);
-    } else {
-        tcg_out_opc_reg(s, ALIAS_PADD, base, TCG_GUEST_BASE_REG, addr_regl);
+    if (guest_base) {
+        if (guest_base == (int16_t)guest_base) {
+            tcg_out_opc_imm(s, ALIAS_PADDI, TCG_REG_A0, base, guest_base);
+        } else {
+            tcg_out_opc_reg(s, ALIAS_PADD, TCG_REG_A0, base,
+                            TCG_GUEST_BASE_REG);
+        }
+        base = TCG_REG_A0;
     }
     if (use_mips32r6_instructions) {
         if (a_bits) {
-            tcg_out_test_alignment(s, true, addr_regl, addr_regh, a_bits);
+            tcg_out_test_alignment(s, true, addrlo, addrhi, a_bits);
         }
-        tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
+        tcg_out_qemu_st_direct(s, datalo, datahi, base, opc);
     } else {
         if (a_bits && a_bits != s_bits) {
-            tcg_out_test_alignment(s, true, addr_regl, addr_regh, a_bits);
+            tcg_out_test_alignment(s, true, addrlo, addrhi, a_bits);
         }
         if (a_bits >= s_bits) {
-            tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
+            tcg_out_qemu_st_direct(s, datalo, datahi, base, opc);
         } else {
-            tcg_out_qemu_st_unalign(s, data_regl, data_regh, base, opc);
+            tcg_out_qemu_st_unalign(s, datalo, datahi, base, opc);
         }
     }
 #endif
@@ -2425,16 +2411,36 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
         break;
 
     case INDEX_op_qemu_ld_i32:
-        tcg_out_qemu_ld(s, args, false);
+        if (TCG_TARGET_REG_BITS >= TARGET_LONG_BITS) {
+            tcg_out_qemu_ld(s, a0, -1, a1, -1, a2, TCG_TYPE_I32);
+        } else {
+            tcg_out_qemu_ld(s, a0, -1, a1, a2, args[3], TCG_TYPE_I32);
+        }
         break;
     case INDEX_op_qemu_ld_i64:
-        tcg_out_qemu_ld(s, args, true);
+        if (TCG_TARGET_REG_BITS == 64) {
+            tcg_out_qemu_ld(s, a0, -1, a1, -1, a2, TCG_TYPE_I64);
+        } else if (TARGET_LONG_BITS == 32) {
+            tcg_out_qemu_ld(s, a0, a1, a2, -1, args[3], TCG_TYPE_I64);
+        } else {
+            tcg_out_qemu_ld(s, a0, a1, a2, args[3], args[4], TCG_TYPE_I64);
+        }
         break;
     case INDEX_op_qemu_st_i32:
-        tcg_out_qemu_st(s, args, false);
+        if (TCG_TARGET_REG_BITS >= TARGET_LONG_BITS) {
+            tcg_out_qemu_st(s, a0, -1, a1, -1, a2, TCG_TYPE_I32);
+        } else {
+            tcg_out_qemu_st(s, a0, -1, a1, a2, args[3], TCG_TYPE_I32);
+        }
         break;
     case INDEX_op_qemu_st_i64:
-        tcg_out_qemu_st(s, args, true);
+        if (TCG_TARGET_REG_BITS == 64) {
+            tcg_out_qemu_st(s, a0, -1, a1, -1, a2, TCG_TYPE_I64);
+        } else if (TARGET_LONG_BITS == 32) {
+            tcg_out_qemu_st(s, a0, a1, a2, -1, args[3], TCG_TYPE_I64);
+        } else {
+            tcg_out_qemu_st(s, a0, a1, a2, args[3], args[4], TCG_TYPE_I64);
+        }
         break;
 
     case INDEX_op_add2_i32:
-- 
2.34.1