Make functions take a parameter for CPUState instead of relying on global env. Pass CPUState pointer to TCG prologue, which moves it to AREG0. Thanks to Peter Maydell and Laurent Desnogues for the ARM prologue change. Revert the hacks to avoid AREG0 use on Sparc hosts. Move cpu_has_work() and cpu_pc_from_tb() from exec.h to cpu.h. Compile the file without HELPER_CFLAGS. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
524 lines
16 KiB
C
524 lines
16 KiB
C
/*
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* Tiny Code Generator for QEMU
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*
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* Copyright (c) 2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h"
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#include "tcg-target.h"
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#include "tcg-runtime.h"
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#if TCG_TARGET_REG_BITS == 32
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typedef int32_t tcg_target_long;
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typedef uint32_t tcg_target_ulong;
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#define TCG_PRIlx PRIx32
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#define TCG_PRIld PRId32
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#elif TCG_TARGET_REG_BITS == 64
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typedef int64_t tcg_target_long;
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typedef uint64_t tcg_target_ulong;
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#define TCG_PRIlx PRIx64
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#define TCG_PRIld PRId64
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#else
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#error unsupported
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#endif
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#if TCG_TARGET_NB_REGS <= 32
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typedef uint32_t TCGRegSet;
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#elif TCG_TARGET_NB_REGS <= 64
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typedef uint64_t TCGRegSet;
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#else
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#error unsupported
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#endif
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typedef enum TCGOpcode {
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#define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
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#include "tcg-opc.h"
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#undef DEF
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NB_OPS,
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} TCGOpcode;
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#define tcg_regset_clear(d) (d) = 0
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#define tcg_regset_set(d, s) (d) = (s)
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#define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
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#define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
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#define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (r))
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#define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
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#define tcg_regset_or(d, a, b) (d) = (a) | (b)
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#define tcg_regset_and(d, a, b) (d) = (a) & (b)
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#define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
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#define tcg_regset_not(d, a) (d) = ~(a)
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typedef struct TCGRelocation {
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struct TCGRelocation *next;
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int type;
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uint8_t *ptr;
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tcg_target_long addend;
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} TCGRelocation;
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typedef struct TCGLabel {
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int has_value;
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union {
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tcg_target_ulong value;
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TCGRelocation *first_reloc;
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} u;
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} TCGLabel;
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typedef struct TCGPool {
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struct TCGPool *next;
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int size;
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uint8_t data[0] __attribute__ ((aligned));
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} TCGPool;
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#define TCG_POOL_CHUNK_SIZE 32768
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#define TCG_MAX_LABELS 512
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#define TCG_MAX_TEMPS 512
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/* when the size of the arguments of a called function is smaller than
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this value, they are statically allocated in the TB stack frame */
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#define TCG_STATIC_CALL_ARGS_SIZE 128
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typedef enum TCGType {
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TCG_TYPE_I32,
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TCG_TYPE_I64,
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TCG_TYPE_COUNT, /* number of different types */
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/* An alias for the size of the host register. */
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#if TCG_TARGET_REG_BITS == 32
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TCG_TYPE_REG = TCG_TYPE_I32,
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#else
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TCG_TYPE_REG = TCG_TYPE_I64,
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#endif
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/* An alias for the size of the native pointer. We don't currently
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support any hosts with 64-bit registers and 32-bit pointers. */
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TCG_TYPE_PTR = TCG_TYPE_REG,
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/* An alias for the size of the target "long", aka register. */
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#if TARGET_LONG_BITS == 64
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TCG_TYPE_TL = TCG_TYPE_I64,
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#else
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TCG_TYPE_TL = TCG_TYPE_I32,
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#endif
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} TCGType;
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typedef tcg_target_ulong TCGArg;
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/* Define a type and accessor macros for varables. Using a struct is
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nice because it gives some level of type safely. Ideally the compiler
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be able to see through all this. However in practice this is not true,
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expecially on targets with braindamaged ABIs (e.g. i386).
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We use plain int by default to avoid this runtime overhead.
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Users of tcg_gen_* don't need to know about any of this, and should
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treat TCGv as an opaque type.
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In addition we do typechecking for different types of variables. TCGv_i32
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and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
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are aliases for target_ulong and host pointer sized values respectively.
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*/
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#ifdef CONFIG_DEBUG_TCG
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#define DEBUG_TCGV 1
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#endif
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#ifdef DEBUG_TCGV
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typedef struct
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{
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int i32;
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} TCGv_i32;
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typedef struct
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{
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int i64;
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} TCGv_i64;
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typedef struct {
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int iptr;
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} TCGv_ptr;
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#define MAKE_TCGV_I32(i) __extension__ \
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({ TCGv_i32 make_tcgv_tmp = {i}; make_tcgv_tmp;})
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#define MAKE_TCGV_I64(i) __extension__ \
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({ TCGv_i64 make_tcgv_tmp = {i}; make_tcgv_tmp;})
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#define MAKE_TCGV_PTR(i) __extension__ \
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({ TCGv_ptr make_tcgv_tmp = {i}; make_tcgv_tmp; })
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#define GET_TCGV_I32(t) ((t).i32)
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#define GET_TCGV_I64(t) ((t).i64)
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#define GET_TCGV_PTR(t) ((t).iptr)
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#if TCG_TARGET_REG_BITS == 32
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#define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
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#define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
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#endif
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#else /* !DEBUG_TCGV */
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typedef int TCGv_i32;
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typedef int TCGv_i64;
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#if TCG_TARGET_REG_BITS == 32
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#define TCGv_ptr TCGv_i32
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#else
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#define TCGv_ptr TCGv_i64
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#endif
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#define MAKE_TCGV_I32(x) (x)
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#define MAKE_TCGV_I64(x) (x)
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#define MAKE_TCGV_PTR(x) (x)
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#define GET_TCGV_I32(t) (t)
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#define GET_TCGV_I64(t) (t)
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#define GET_TCGV_PTR(t) (t)
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#if TCG_TARGET_REG_BITS == 32
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#define TCGV_LOW(t) (t)
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#define TCGV_HIGH(t) ((t) + 1)
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#endif
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#endif /* DEBUG_TCGV */
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#define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
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#define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
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/* Dummy definition to avoid compiler warnings. */
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#define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
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#define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
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/* call flags */
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#define TCG_CALL_TYPE_MASK 0x000f
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#define TCG_CALL_TYPE_STD 0x0000 /* standard C call */
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#define TCG_CALL_TYPE_REGPARM_1 0x0001 /* i386 style regparm call (1 reg) */
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#define TCG_CALL_TYPE_REGPARM_2 0x0002 /* i386 style regparm call (2 regs) */
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#define TCG_CALL_TYPE_REGPARM 0x0003 /* i386 style regparm call (3 regs) */
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/* A pure function only reads its arguments and TCG global variables
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and cannot raise exceptions. Hence a call to a pure function can be
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safely suppressed if the return value is not used. */
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#define TCG_CALL_PURE 0x0010
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/* A const function only reads its arguments and does not use TCG
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global variables. Hence a call to such a function does not
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save TCG global variables back to their canonical location. */
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#define TCG_CALL_CONST 0x0020
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/* used to align parameters */
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#define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
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#define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
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typedef enum {
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TCG_COND_EQ,
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TCG_COND_NE,
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TCG_COND_LT,
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TCG_COND_GE,
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TCG_COND_LE,
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TCG_COND_GT,
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/* unsigned */
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TCG_COND_LTU,
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TCG_COND_GEU,
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TCG_COND_LEU,
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TCG_COND_GTU,
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} TCGCond;
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/* Invert the sense of the comparison. */
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static inline TCGCond tcg_invert_cond(TCGCond c)
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{
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return (TCGCond)(c ^ 1);
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}
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/* Swap the operands in a comparison. */
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static inline TCGCond tcg_swap_cond(TCGCond c)
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{
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int mask = (c < TCG_COND_LT ? 0 : c < TCG_COND_LTU ? 7 : 15);
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return (TCGCond)(c ^ mask);
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}
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static inline TCGCond tcg_unsigned_cond(TCGCond c)
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{
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return (c >= TCG_COND_LT && c <= TCG_COND_GT ? c + 4 : c);
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}
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#define TEMP_VAL_DEAD 0
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#define TEMP_VAL_REG 1
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#define TEMP_VAL_MEM 2
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#define TEMP_VAL_CONST 3
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/* XXX: optimize memory layout */
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typedef struct TCGTemp {
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TCGType base_type;
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TCGType type;
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int val_type;
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int reg;
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tcg_target_long val;
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int mem_reg;
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tcg_target_long mem_offset;
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unsigned int fixed_reg:1;
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unsigned int mem_coherent:1;
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unsigned int mem_allocated:1;
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unsigned int temp_local:1; /* If true, the temp is saved across
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basic blocks. Otherwise, it is not
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preserved across basic blocks. */
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unsigned int temp_allocated:1; /* never used for code gen */
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/* index of next free temp of same base type, -1 if end */
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int next_free_temp;
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const char *name;
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} TCGTemp;
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typedef struct TCGHelperInfo {
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tcg_target_ulong func;
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const char *name;
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} TCGHelperInfo;
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typedef struct TCGContext TCGContext;
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struct TCGContext {
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uint8_t *pool_cur, *pool_end;
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TCGPool *pool_first, *pool_current;
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TCGLabel *labels;
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int nb_labels;
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TCGTemp *temps; /* globals first, temps after */
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int nb_globals;
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int nb_temps;
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/* index of free temps, -1 if none */
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int first_free_temp[TCG_TYPE_COUNT * 2];
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/* goto_tb support */
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uint8_t *code_buf;
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unsigned long *tb_next;
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uint16_t *tb_next_offset;
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uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
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/* liveness analysis */
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uint16_t *op_dead_args; /* for each operation, each bit tells if the
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corresponding argument is dead */
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/* tells in which temporary a given register is. It does not take
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into account fixed registers */
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int reg_to_temp[TCG_TARGET_NB_REGS];
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TCGRegSet reserved_regs;
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tcg_target_long current_frame_offset;
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tcg_target_long frame_start;
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tcg_target_long frame_end;
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int frame_reg;
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uint8_t *code_ptr;
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TCGTemp static_temps[TCG_MAX_TEMPS];
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TCGHelperInfo *helpers;
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int nb_helpers;
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int allocated_helpers;
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int helpers_sorted;
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#ifdef CONFIG_PROFILER
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/* profiling info */
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int64_t tb_count1;
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int64_t tb_count;
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int64_t op_count; /* total insn count */
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int op_count_max; /* max insn per TB */
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int64_t temp_count;
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int temp_count_max;
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int64_t del_op_count;
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int64_t code_in_len;
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int64_t code_out_len;
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int64_t interm_time;
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int64_t code_time;
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int64_t la_time;
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int64_t restore_count;
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int64_t restore_time;
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#endif
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#ifdef CONFIG_DEBUG_TCG
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int temps_in_use;
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#endif
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};
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extern TCGContext tcg_ctx;
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extern uint16_t *gen_opc_ptr;
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extern TCGArg *gen_opparam_ptr;
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extern uint16_t gen_opc_buf[];
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extern TCGArg gen_opparam_buf[];
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/* pool based memory allocation */
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void *tcg_malloc_internal(TCGContext *s, int size);
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void tcg_pool_reset(TCGContext *s);
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void tcg_pool_delete(TCGContext *s);
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static inline void *tcg_malloc(int size)
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{
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TCGContext *s = &tcg_ctx;
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uint8_t *ptr, *ptr_end;
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size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
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ptr = s->pool_cur;
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ptr_end = ptr + size;
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if (unlikely(ptr_end > s->pool_end)) {
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return tcg_malloc_internal(&tcg_ctx, size);
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} else {
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s->pool_cur = ptr_end;
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return ptr;
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}
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}
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void tcg_context_init(TCGContext *s);
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void tcg_prologue_init(TCGContext *s);
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void tcg_func_start(TCGContext *s);
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int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf);
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int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset);
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void tcg_set_frame(TCGContext *s, int reg,
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tcg_target_long start, tcg_target_long size);
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TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
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TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
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const char *name);
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TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
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static inline TCGv_i32 tcg_temp_new_i32(void)
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{
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return tcg_temp_new_internal_i32(0);
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}
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static inline TCGv_i32 tcg_temp_local_new_i32(void)
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{
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return tcg_temp_new_internal_i32(1);
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}
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void tcg_temp_free_i32(TCGv_i32 arg);
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char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
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TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
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TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
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const char *name);
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TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
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static inline TCGv_i64 tcg_temp_new_i64(void)
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{
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return tcg_temp_new_internal_i64(0);
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}
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static inline TCGv_i64 tcg_temp_local_new_i64(void)
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{
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return tcg_temp_new_internal_i64(1);
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}
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void tcg_temp_free_i64(TCGv_i64 arg);
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char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
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#if defined(CONFIG_DEBUG_TCG)
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/* If you call tcg_clear_temp_count() at the start of a section of
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* code which is not supposed to leak any TCG temporaries, then
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* calling tcg_check_temp_count() at the end of the section will
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* return 1 if the section did in fact leak a temporary.
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*/
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void tcg_clear_temp_count(void);
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int tcg_check_temp_count(void);
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#else
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#define tcg_clear_temp_count() do { } while (0)
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#define tcg_check_temp_count() 0
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#endif
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void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
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#define TCG_CT_ALIAS 0x80
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#define TCG_CT_IALIAS 0x40
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#define TCG_CT_REG 0x01
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#define TCG_CT_CONST 0x02 /* any constant of register size */
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typedef struct TCGArgConstraint {
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uint16_t ct;
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uint8_t alias_index;
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union {
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TCGRegSet regs;
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} u;
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} TCGArgConstraint;
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#define TCG_MAX_OP_ARGS 16
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#define TCG_OPF_BB_END 0x01 /* instruction defines the end of a basic
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block */
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#define TCG_OPF_CALL_CLOBBER 0x02 /* instruction clobbers call registers
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and potentially update globals. */
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#define TCG_OPF_SIDE_EFFECTS 0x04 /* instruction has side effects : it
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cannot be removed if its output
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are not used */
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typedef struct TCGOpDef {
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const char *name;
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uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
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uint8_t flags;
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TCGArgConstraint *args_ct;
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int *sorted_args;
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#if defined(CONFIG_DEBUG_TCG)
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int used;
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#endif
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} TCGOpDef;
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typedef struct TCGTargetOpDef {
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TCGOpcode op;
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const char *args_ct_str[TCG_MAX_OP_ARGS];
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} TCGTargetOpDef;
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#define tcg_abort() \
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do {\
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fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
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abort();\
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} while (0)
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void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
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#if TCG_TARGET_REG_BITS == 32
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#define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
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#define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
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#define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32(V))
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#define tcg_global_reg_new_ptr(R, N) \
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TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
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#define tcg_global_mem_new_ptr(R, O, N) \
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TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
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#define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
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#define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
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#else
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#define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
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#define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
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#define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64(V))
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#define tcg_global_reg_new_ptr(R, N) \
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TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
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#define tcg_global_mem_new_ptr(R, O, N) \
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TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
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#define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
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#define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
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#endif
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void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
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int sizemask, TCGArg ret, int nargs, TCGArg *args);
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void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
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int c, int right, int arith);
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/* only used for debugging purposes */
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void tcg_register_helper(void *func, const char *name);
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const char *tcg_helper_get_name(TCGContext *s, void *func);
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void tcg_dump_ops(TCGContext *s, FILE *outfile);
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void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
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TCGv_i32 tcg_const_i32(int32_t val);
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TCGv_i64 tcg_const_i64(int64_t val);
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TCGv_i32 tcg_const_local_i32(int32_t val);
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TCGv_i64 tcg_const_local_i64(int64_t val);
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extern uint8_t code_gen_prologue[];
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#if defined(_ARCH_PPC) && !defined(_ARCH_PPC64)
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#define tcg_qemu_tb_exec(env, tb_ptr) \
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((long REGPARM __attribute__ ((longcall)) (*)(void *, void *))code_gen_prologue)(env, tb_ptr)
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#else
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#define tcg_qemu_tb_exec(env, tb_ptr) \
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((long REGPARM (*)(void *, void *))code_gen_prologue)(env, tb_ptr)
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#endif
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