tcg/i386: Split out target constraints to tcg-target-con-str.h

This eliminates the target-specific function target_parse_constraint
and folds it into the single caller, process_op_defs.  Since this is
done directly into the switch statement, duplicates are compilation
errors rather than silently ignored at runtime.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

3 files changed, 34 insertions, 69 deletions

diff --git a/tcg/i386/tcg-target-con-str.h b/tcg/i386/tcg-target-con-str.h
new file mode 100644
index 0000000..24e6bcb
--- /dev/null
+++ b/tcg/i386/tcg-target-con-str.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Define i386 target-specific operand constraints.
+ * Copyright (c) 2021 Linaro
+ *
+ */
+
+/*
+ * Define constraint letters for register sets:
+ * REGS(letter, register_mask)
+ */
+REGS('a', 1u << TCG_REG_EAX)
+REGS('b', 1u << TCG_REG_EBX)
+REGS('c', 1u << TCG_REG_ECX)
+REGS('d', 1u << TCG_REG_EDX)
+REGS('S', 1u << TCG_REG_ESI)
+REGS('D', 1u << TCG_REG_EDI)
+
+REGS('r', ALL_GENERAL_REGS)
+REGS('x', ALL_VECTOR_REGS)
+REGS('q', ALL_BYTEL_REGS)     /* regs that can be used as a byte operand */
+REGS('Q', ALL_BYTEH_REGS)     /* regs with a second byte (e.g. %ah) */
+REGS('L', ALL_GENERAL_REGS & ~SOFTMMU_RESERVE_REGS)  /* qemu_ld/st */
+REGS('s', ALL_BYTEL_REGS & ~SOFTMMU_RESERVE_REGS)    /* qemu_st8_i32 data */
+
+/*
+ * Define constraint letters for constants:
+ * CONST(letter, TCG_CT_CONST_* bit set)
+ */
+CONST('e', TCG_CT_CONST_S32)
+CONST('I', TCG_CT_CONST_I32)
+CONST('W', TCG_CT_CONST_WSZ)
+CONST('Z', TCG_CT_CONST_U32)
diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc
index 4feb7e2..d3cf977 100644
--- a/tcg/i386/tcg-target.c.inc
+++ b/tcg/i386/tcg-target.c.inc
@@ -209,75 +209,6 @@ static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
     return true;
 }
 
-/* parse target specific constraints */
-static const char *target_parse_constraint(TCGArgConstraint *ct,
-                                           const char *ct_str, TCGType type)
-{
-    switch(*ct_str++) {
-    case 'a':
-        tcg_regset_set_reg(ct->regs, TCG_REG_EAX);
-        break;
-    case 'b':
-        tcg_regset_set_reg(ct->regs, TCG_REG_EBX);
-        break;
-    case 'c':
-        tcg_regset_set_reg(ct->regs, TCG_REG_ECX);
-        break;
-    case 'd':
-        tcg_regset_set_reg(ct->regs, TCG_REG_EDX);
-        break;
-    case 'S':
-        tcg_regset_set_reg(ct->regs, TCG_REG_ESI);
-        break;
-    case 'D':
-        tcg_regset_set_reg(ct->regs, TCG_REG_EDI);
-        break;
-    case 'q':
-        /* A register that can be used as a byte operand.  */
-        ct->regs |= ALL_BYTEL_REGS;
-        break;
-    case 'Q':
-        /* A register with an addressable second byte (e.g. %ah).  */
-        ct->regs |= ALL_BYTEH_REGS;
-        break;
-    case 'r':
-        /* A general register.  */
-        ct->regs |= ALL_GENERAL_REGS;
-        break;
-    case 'W':
-        /* With TZCNT/LZCNT, we can have operand-size as an input.  */
-        ct->ct |= TCG_CT_CONST_WSZ;
-        break;
-    case 'x':
-        /* A vector register.  */
-        ct->regs |= ALL_VECTOR_REGS;
-        break;
-
-    case 'L':
-        /* qemu_ld/st data+address constraint */
-        ct->regs |= ALL_GENERAL_REGS & ~SOFTMMU_RESERVE_REGS;
-        break;
-    case 's':
-        /* qemu_st8_i32 data constraint */
-        ct->regs |= ALL_BYTEL_REGS & ~SOFTMMU_RESERVE_REGS;
-        break;
-
-    case 'e':
-        ct->ct |= TCG_CT_CONST_S32;
-        break;
-    case 'Z':
-        ct->ct |= TCG_CT_CONST_U32;
-        break;
-    case 'I':
-        ct->ct |= TCG_CT_CONST_I32;
-        break;
-
-    default:
-        return NULL;
-    }
-    return ct_str;
-}
-
 /* test if a constant matches the constraint */
 static inline int tcg_target_const_match(tcg_target_long val, TCGType type,
                                          const TCGArgConstraint *arg_ct)
diff --git a/tcg/i386/tcg-target.h b/tcg/i386/tcg-target.h
index b693d36..77693e1 100644
--- a/tcg/i386/tcg-target.h
+++ b/tcg/i386/tcg-target.h
@@ -235,5 +235,6 @@ static inline void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_rx,
 #define TCG_TARGET_NEED_LDST_LABELS
 #endif
 #define TCG_TARGET_NEED_POOL_LABELS
+#define TCG_TARGET_CON_STR_H
 
 #endif