tcg/i386: Split out constraint sets to tcg-target-con-set.h

This exports the constraint sets from tcg_target_op_def to
a place we will be able to manipulate more in future.

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

1 files changed, 119 insertions, 0 deletions

diff --git a/tcg/tcg.c b/tcg/tcg.c
index 39bcdff8dc..df9f32763e 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -69,7 +69,9 @@
 /* Forward declarations for functions declared in tcg-target.c.inc and
    used here. */
 static void tcg_target_init(TCGContext *s);
+#ifndef TCG_TARGET_CON_SET_H
 static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode);
+#endif
 static void tcg_target_qemu_prologue(TCGContext *s);
 static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
                         intptr_t value, intptr_t addend);
@@ -347,6 +349,112 @@ static void set_jmp_reset_offset(TCGContext *s, int which)
     s->tb_jmp_reset_offset[which] = tcg_current_code_size(s);
 }
 
+#ifdef TCG_TARGET_CON_SET_H
+#define C_PFX1(P, A)                    P##A
+#define C_PFX2(P, A, B)                 P##A##_##B
+#define C_PFX3(P, A, B, C)              P##A##_##B##_##C
+#define C_PFX4(P, A, B, C, D)           P##A##_##B##_##C##_##D
+#define C_PFX5(P, A, B, C, D, E)        P##A##_##B##_##C##_##D##_##E
+#define C_PFX6(P, A, B, C, D, E, F)     P##A##_##B##_##C##_##D##_##E##_##F
+
+/* Define an enumeration for the various combinations. */
+
+#define C_O0_I1(I1)                     C_PFX1(c_o0_i1_, I1),
+#define C_O0_I2(I1, I2)                 C_PFX2(c_o0_i2_, I1, I2),
+#define C_O0_I3(I1, I2, I3)             C_PFX3(c_o0_i3_, I1, I2, I3),
+#define C_O0_I4(I1, I2, I3, I4)         C_PFX4(c_o0_i4_, I1, I2, I3, I4),
+
+#define C_O1_I1(O1, I1)                 C_PFX2(c_o1_i1_, O1, I1),
+#define C_O1_I2(O1, I1, I2)             C_PFX3(c_o1_i2_, O1, I1, I2),
+#define C_O1_I3(O1, I1, I2, I3)         C_PFX4(c_o1_i3_, O1, I1, I2, I3),
+#define C_O1_I4(O1, I1, I2, I3, I4)     C_PFX5(c_o1_i4_, O1, I1, I2, I3, I4),
+
+#define C_N1_I2(O1, I1, I2)             C_PFX3(c_n1_i2_, O1, I1, I2),
+
+#define C_O2_I1(O1, O2, I1)             C_PFX3(c_o2_i1_, O1, O2, I1),
+#define C_O2_I2(O1, O2, I1, I2)         C_PFX4(c_o2_i2_, O1, O2, I1, I2),
+#define C_O2_I3(O1, O2, I1, I2, I3)     C_PFX5(c_o2_i3_, O1, O2, I1, I2, I3),
+#define C_O2_I4(O1, O2, I1, I2, I3, I4) C_PFX6(c_o2_i4_, O1, O2, I1, I2, I3, I4),
+
+typedef enum {
+#include "tcg-target-con-set.h"
+} TCGConstraintSetIndex;
+
+static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode);
+
+#undef C_O0_I1
+#undef C_O0_I2
+#undef C_O0_I3
+#undef C_O0_I4
+#undef C_O1_I1
+#undef C_O1_I2
+#undef C_O1_I3
+#undef C_O1_I4
+#undef C_N1_I2
+#undef C_O2_I1
+#undef C_O2_I2
+#undef C_O2_I3
+#undef C_O2_I4
+
+/* Put all of the constraint sets into an array, indexed by the enum. */
+
+#define C_O0_I1(I1)                     { .args_ct_str = { #I1 } },
+#define C_O0_I2(I1, I2)                 { .args_ct_str = { #I1, #I2 } },
+#define C_O0_I3(I1, I2, I3)             { .args_ct_str = { #I1, #I2, #I3 } },
+#define C_O0_I4(I1, I2, I3, I4)         { .args_ct_str = { #I1, #I2, #I3, #I4 } },
+
+#define C_O1_I1(O1, I1)                 { .args_ct_str = { #O1, #I1 } },
+#define C_O1_I2(O1, I1, I2)             { .args_ct_str = { #O1, #I1, #I2 } },
+#define C_O1_I3(O1, I1, I2, I3)         { .args_ct_str = { #O1, #I1, #I2, #I3 } },
+#define C_O1_I4(O1, I1, I2, I3, I4)     { .args_ct_str = { #O1, #I1, #I2, #I3, #I4 } },
+
+#define C_N1_I2(O1, I1, I2)             { .args_ct_str = { "&" #O1, #I1, #I2 } },
+
+#define C_O2_I1(O1, O2, I1)             { .args_ct_str = { #O1, #O2, #I1 } },
+#define C_O2_I2(O1, O2, I1, I2)         { .args_ct_str = { #O1, #O2, #I1, #I2 } },
+#define C_O2_I3(O1, O2, I1, I2, I3)     { .args_ct_str = { #O1, #O2, #I1, #I2, #I3 } },
+#define C_O2_I4(O1, O2, I1, I2, I3, I4) { .args_ct_str = { #O1, #O2, #I1, #I2, #I3, #I4 } },
+
+static const TCGTargetOpDef constraint_sets[] = {
+#include "tcg-target-con-set.h"
+};
+
+
+#undef C_O0_I1
+#undef C_O0_I2
+#undef C_O0_I3
+#undef C_O0_I4
+#undef C_O1_I1
+#undef C_O1_I2
+#undef C_O1_I3
+#undef C_O1_I4
+#undef C_N1_I2
+#undef C_O2_I1
+#undef C_O2_I2
+#undef C_O2_I3
+#undef C_O2_I4
+
+/* Expand the enumerator to be returned from tcg_target_op_def(). */
+
+#define C_O0_I1(I1)                     C_PFX1(c_o0_i1_, I1)
+#define C_O0_I2(I1, I2)                 C_PFX2(c_o0_i2_, I1, I2)
+#define C_O0_I3(I1, I2, I3)             C_PFX3(c_o0_i3_, I1, I2, I3)
+#define C_O0_I4(I1, I2, I3, I4)         C_PFX4(c_o0_i4_, I1, I2, I3, I4)
+
+#define C_O1_I1(O1, I1)                 C_PFX2(c_o1_i1_, O1, I1)
+#define C_O1_I2(O1, I1, I2)             C_PFX3(c_o1_i2_, O1, I1, I2)
+#define C_O1_I3(O1, I1, I2, I3)         C_PFX4(c_o1_i3_, O1, I1, I2, I3)
+#define C_O1_I4(O1, I1, I2, I3, I4)     C_PFX5(c_o1_i4_, O1, I1, I2, I3, I4)
+
+#define C_N1_I2(O1, I1, I2)             C_PFX3(c_n1_i2_, O1, I1, I2)
+
+#define C_O2_I1(O1, O2, I1)             C_PFX3(c_o2_i1_, O1, O2, I1)
+#define C_O2_I2(O1, O2, I1, I2)         C_PFX4(c_o2_i2_, O1, O2, I1, I2)
+#define C_O2_I3(O1, O2, I1, I2, I3)     C_PFX5(c_o2_i3_, O1, O2, I1, I2, I3)
+#define C_O2_I4(O1, O2, I1, I2, I3, I4) C_PFX6(c_o2_i4_, O1, O2, I1, I2, I3, I4)
+
+#endif /* TCG_TARGET_CON_SET_H */
+
 #include "tcg-target.c.inc"
 
 /* compare a pointer @ptr and a tb_tc @s */
@@ -2424,9 +2532,20 @@ static void process_op_defs(TCGContext *s)
             continue;
         }
 
+#ifdef TCG_TARGET_CON_SET_H
+        /*
+         * Macro magic should make it impossible, but double-check that
+         * the array index is in range.  Since the signness of an enum
+         * is implementation defined, force the result to unsigned.
+         */
+        unsigned con_set = tcg_target_op_def(op);
+        tcg_debug_assert(con_set < ARRAY_SIZE(constraint_sets));
+        tdefs = &constraint_sets[con_set];
+#else
         tdefs = tcg_target_op_def(op);
         /* Missing TCGTargetOpDef entry. */
         tcg_debug_assert(tdefs != NULL);
+#endif
 
         for (i = 0; i < nb_args; i++) {
             const char *ct_str = tdefs->args_ct_str[i];