/* Definitions of Tensilica's Xtensa target machine for GNU compiler.
- Copyright (C) 2001 Free Software Foundation, Inc.
+ Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* Get Xtensa configuration settings */
-#include "xtensa/xtensa-config.h"
-
-/* Standard GCC variables that we reference. */
-extern int current_function_calls_alloca;
-extern int target_flags;
-extern int optimize;
+#include "xtensa-config.h"
/* External variables defined in xtensa.c. */
-/* comparison type */
-enum cmp_type {
- CMP_SI, /* four byte integers */
- CMP_DI, /* eight byte integers */
- CMP_SF, /* single precision floats */
- CMP_DF, /* double precision floats */
- CMP_MAX /* max comparison type */
-};
-
-extern struct rtx_def * branch_cmp[2]; /* operands for compare */
-extern enum cmp_type branch_type; /* what type of branch to use */
extern unsigned xtensa_current_frame_size;
-/* Run-time compilation parameters selecting different hardware subsets. */
-
-#define MASK_BIG_ENDIAN 0x00000001 /* big or little endian */
-#define MASK_DENSITY 0x00000002 /* code density option */
-#define MASK_MAC16 0x00000004 /* MAC16 option */
-#define MASK_MUL16 0x00000008 /* 16-bit integer multiply */
-#define MASK_MUL32 0x00000010 /* integer multiply/divide */
-#define MASK_DIV32 0x00000020 /* integer multiply/divide */
-#define MASK_NSA 0x00000040 /* nsa instruction option */
-#define MASK_MINMAX 0x00000080 /* min/max instructions */
-#define MASK_SEXT 0x00000100 /* sign extend insn option */
-#define MASK_BOOLEANS 0x00000200 /* boolean register option */
-#define MASK_HARD_FLOAT 0x00000400 /* floating-point option */
-#define MASK_HARD_FLOAT_DIV 0x00000800 /* floating-point divide */
-#define MASK_HARD_FLOAT_RECIP 0x00001000 /* floating-point reciprocal */
-#define MASK_HARD_FLOAT_SQRT 0x00002000 /* floating-point sqrt */
-#define MASK_HARD_FLOAT_RSQRT 0x00004000 /* floating-point recip sqrt */
-#define MASK_NO_FUSED_MADD 0x00008000 /* avoid f-p mul/add */
-#define MASK_SERIALIZE_VOLATILE 0x00010000 /* serialize volatile refs */
-
-/* Macros used in the machine description to test the flags. */
-
-#define TARGET_BIG_ENDIAN (target_flags & MASK_BIG_ENDIAN)
-#define TARGET_DENSITY (target_flags & MASK_DENSITY)
-#define TARGET_MAC16 (target_flags & MASK_MAC16)
-#define TARGET_MUL16 (target_flags & MASK_MUL16)
-#define TARGET_MUL32 (target_flags & MASK_MUL32)
-#define TARGET_DIV32 (target_flags & MASK_DIV32)
-#define TARGET_NSA (target_flags & MASK_NSA)
-#define TARGET_MINMAX (target_flags & MASK_MINMAX)
-#define TARGET_SEXT (target_flags & MASK_SEXT)
-#define TARGET_BOOLEANS (target_flags & MASK_BOOLEANS)
-#define TARGET_HARD_FLOAT (target_flags & MASK_HARD_FLOAT)
-#define TARGET_HARD_FLOAT_DIV (target_flags & MASK_HARD_FLOAT_DIV)
-#define TARGET_HARD_FLOAT_RECIP (target_flags & MASK_HARD_FLOAT_RECIP)
-#define TARGET_HARD_FLOAT_SQRT (target_flags & MASK_HARD_FLOAT_SQRT)
-#define TARGET_HARD_FLOAT_RSQRT (target_flags & MASK_HARD_FLOAT_RSQRT)
-#define TARGET_NO_FUSED_MADD (target_flags & MASK_NO_FUSED_MADD)
-#define TARGET_SERIALIZE_VOLATILE (target_flags & MASK_SERIALIZE_VOLATILE)
-
-/* Default target_flags if no switches are specified */
-
-#define TARGET_DEFAULT ( \
- (XCHAL_HAVE_BE ? MASK_BIG_ENDIAN : 0) | \
- (XCHAL_HAVE_DENSITY ? MASK_DENSITY : 0) | \
- (XCHAL_HAVE_MAC16 ? MASK_MAC16 : 0) | \
- (XCHAL_HAVE_MUL16 ? MASK_MUL16 : 0) | \
- (XCHAL_HAVE_MUL32 ? MASK_MUL32 : 0) | \
- (XCHAL_HAVE_DIV32 ? MASK_DIV32 : 0) | \
- (XCHAL_HAVE_NSA ? MASK_NSA : 0) | \
- (XCHAL_HAVE_MINMAX ? MASK_MINMAX : 0) | \
- (XCHAL_HAVE_SEXT ? MASK_SEXT : 0) | \
- (XCHAL_HAVE_BOOLEANS ? MASK_BOOLEANS : 0) | \
- (XCHAL_HAVE_FP ? MASK_HARD_FLOAT : 0) | \
- (XCHAL_HAVE_FP_DIV ? MASK_HARD_FLOAT_DIV : 0) | \
- (XCHAL_HAVE_FP_RECIP ? MASK_HARD_FLOAT_RECIP : 0) | \
- (XCHAL_HAVE_FP_SQRT ? MASK_HARD_FLOAT_SQRT : 0) | \
- (XCHAL_HAVE_FP_RSQRT ? MASK_HARD_FLOAT_RSQRT : 0) | \
- MASK_SERIALIZE_VOLATILE)
-
-/* Macro to define tables used to set the flags. */
-
-#define TARGET_SWITCHES \
-{ \
- {"big-endian", MASK_BIG_ENDIAN, \
- N_("Use big-endian byte order")}, \
- {"little-endian", -MASK_BIG_ENDIAN, \
- N_("Use little-endian byte order")}, \
- {"density", MASK_DENSITY, \
- N_("Use the Xtensa code density option")}, \
- {"no-density", -MASK_DENSITY, \
- N_("Do not use the Xtensa code density option")}, \
- {"mac16", MASK_MAC16, \
- N_("Use the Xtensa MAC16 option")}, \
- {"no-mac16", -MASK_MAC16, \
- N_("Do not use the Xtensa MAC16 option")}, \
- {"mul16", MASK_MUL16, \
- N_("Use the Xtensa MUL16 option")}, \
- {"no-mul16", -MASK_MUL16, \
- N_("Do not use the Xtensa MUL16 option")}, \
- {"mul32", MASK_MUL32, \
- N_("Use the Xtensa MUL32 option")}, \
- {"no-mul32", -MASK_MUL32, \
- N_("Do not use the Xtensa MUL32 option")}, \
- {"div32", MASK_DIV32, \
- 0 /* undocumented */}, \
- {"no-div32", -MASK_DIV32, \
- 0 /* undocumented */}, \
- {"nsa", MASK_NSA, \
- N_("Use the Xtensa NSA option")}, \
- {"no-nsa", -MASK_NSA, \
- N_("Do not use the Xtensa NSA option")}, \
- {"minmax", MASK_MINMAX, \
- N_("Use the Xtensa MIN/MAX option")}, \
- {"no-minmax", -MASK_MINMAX, \
- N_("Do not use the Xtensa MIN/MAX option")}, \
- {"sext", MASK_SEXT, \
- N_("Use the Xtensa SEXT option")}, \
- {"no-sext", -MASK_SEXT, \
- N_("Do not use the Xtensa SEXT option")}, \
- {"booleans", MASK_BOOLEANS, \
- N_("Use the Xtensa boolean register option")}, \
- {"no-booleans", -MASK_BOOLEANS, \
- N_("Do not use the Xtensa boolean register option")}, \
- {"hard-float", MASK_HARD_FLOAT, \
- N_("Use the Xtensa floating-point unit")}, \
- {"soft-float", -MASK_HARD_FLOAT, \
- N_("Do not use the Xtensa floating-point unit")}, \
- {"hard-float-div", MASK_HARD_FLOAT_DIV, \
- 0 /* undocumented */}, \
- {"no-hard-float-div", -MASK_HARD_FLOAT_DIV, \
- 0 /* undocumented */}, \
- {"hard-float-recip", MASK_HARD_FLOAT_RECIP, \
- 0 /* undocumented */}, \
- {"no-hard-float-recip", -MASK_HARD_FLOAT_RECIP, \
- 0 /* undocumented */}, \
- {"hard-float-sqrt", MASK_HARD_FLOAT_SQRT, \
- 0 /* undocumented */}, \
- {"no-hard-float-sqrt", -MASK_HARD_FLOAT_SQRT, \
- 0 /* undocumented */}, \
- {"hard-float-rsqrt", MASK_HARD_FLOAT_RSQRT, \
- 0 /* undocumented */}, \
- {"no-hard-float-rsqrt", -MASK_HARD_FLOAT_RSQRT, \
- 0 /* undocumented */}, \
- {"no-fused-madd", MASK_NO_FUSED_MADD, \
- N_("Disable fused multiply/add and multiply/subtract FP instructions")}, \
- {"fused-madd", -MASK_NO_FUSED_MADD, \
- N_("Enable fused multiply/add and multiply/subtract FP instructions")}, \
- {"serialize-volatile", MASK_SERIALIZE_VOLATILE, \
- N_("Serialize volatile memory references with MEMW instructions")}, \
- {"no-serialize-volatile", -MASK_SERIALIZE_VOLATILE, \
- N_("Do not serialize volatile memory references with MEMW instructions")},\
- {"text-section-literals", 0, \
- N_("Intersperse literal pools with code in the text section")}, \
- {"no-text-section-literals", 0, \
- N_("Put literal pools in a separate literal section")}, \
- {"target-align", 0, \
- N_("Automatically align branch targets to reduce branch penalties")}, \
- {"no-target-align", 0, \
- N_("Do not automatically align branch targets")}, \
- {"longcalls", 0, \
- N_("Use indirect CALLXn instructions for large programs")}, \
- {"no-longcalls", 0, \
- N_("Use direct CALLn instructions for fast calls")}, \
- {"", TARGET_DEFAULT, 0} \
-}
-
-
-#define OVERRIDE_OPTIONS override_options ()
-
-#if XCHAL_HAVE_BE
-#define CPP_ENDIAN_SPEC "\
- %{mlittle-endian:-D__XTENSA_EL__} \
- %{!mlittle-endian:-D__XTENSA_EB__} "
-#else /* !XCHAL_HAVE_BE */
-#define CPP_ENDIAN_SPEC "\
- %{mbig-endian:-D__XTENSA_EB__} \
- %{!mbig-endian:-D__XTENSA_EL__} "
-#endif /* !XCHAL_HAVE_BE */
-
-#if XCHAL_HAVE_FP
-#define CPP_FLOAT_SPEC "%{msoft-float:-D__XTENSA_SOFT_FLOAT__}"
-#else
-#define CPP_FLOAT_SPEC "%{!mhard-float:-D__XTENSA_SOFT_FLOAT__}"
+/* Macros used in the machine description to select various Xtensa
+ configuration options. */
+#ifndef XCHAL_HAVE_MUL32_HIGH
+#define XCHAL_HAVE_MUL32_HIGH 0
+#endif
+#ifndef XCHAL_HAVE_RELEASE_SYNC
+#define XCHAL_HAVE_RELEASE_SYNC 0
+#endif
+#ifndef XCHAL_HAVE_S32C1I
+#define XCHAL_HAVE_S32C1I 0
+#endif
+#ifndef XCHAL_HAVE_THREADPTR
+#define XCHAL_HAVE_THREADPTR 0
+#endif
+#define TARGET_BIG_ENDIAN XCHAL_HAVE_BE
+#define TARGET_DENSITY XCHAL_HAVE_DENSITY
+#define TARGET_MAC16 XCHAL_HAVE_MAC16
+#define TARGET_MUL16 XCHAL_HAVE_MUL16
+#define TARGET_MUL32 XCHAL_HAVE_MUL32
+#define TARGET_MUL32_HIGH XCHAL_HAVE_MUL32_HIGH
+#define TARGET_DIV32 XCHAL_HAVE_DIV32
+#define TARGET_NSA XCHAL_HAVE_NSA
+#define TARGET_MINMAX XCHAL_HAVE_MINMAX
+#define TARGET_SEXT XCHAL_HAVE_SEXT
+#define TARGET_BOOLEANS XCHAL_HAVE_BOOLEANS
+#define TARGET_HARD_FLOAT XCHAL_HAVE_FP
+#define TARGET_HARD_FLOAT_DIV XCHAL_HAVE_FP_DIV
+#define TARGET_HARD_FLOAT_RECIP XCHAL_HAVE_FP_RECIP
+#define TARGET_HARD_FLOAT_SQRT XCHAL_HAVE_FP_SQRT
+#define TARGET_HARD_FLOAT_RSQRT XCHAL_HAVE_FP_RSQRT
+#define TARGET_ABS XCHAL_HAVE_ABS
+#define TARGET_ADDX XCHAL_HAVE_ADDX
+#define TARGET_RELEASE_SYNC XCHAL_HAVE_RELEASE_SYNC
+#define TARGET_S32C1I XCHAL_HAVE_S32C1I
+#define TARGET_ABSOLUTE_LITERALS XSHAL_USE_ABSOLUTE_LITERALS
+#define TARGET_THREADPTR XCHAL_HAVE_THREADPTR
+
+#define TARGET_DEFAULT \
+ ((XCHAL_HAVE_L32R ? 0 : MASK_CONST16) | \
+ MASK_SERIALIZE_VOLATILE)
+
+#ifndef HAVE_AS_TLS
+#define HAVE_AS_TLS 0
#endif
-#undef CPP_SPEC
-#define CPP_SPEC CPP_ENDIAN_SPEC CPP_FLOAT_SPEC
+\f
+/* Target CPU builtins. */
+#define TARGET_CPU_CPP_BUILTINS() \
+ do { \
+ builtin_assert ("cpu=xtensa"); \
+ builtin_assert ("machine=xtensa"); \
+ builtin_define ("__xtensa__"); \
+ builtin_define ("__XTENSA__"); \
+ builtin_define ("__XTENSA_WINDOWED_ABI__"); \
+ builtin_define (TARGET_BIG_ENDIAN ? "__XTENSA_EB__" : "__XTENSA_EL__"); \
+ if (!TARGET_HARD_FLOAT) \
+ builtin_define ("__XTENSA_SOFT_FLOAT__"); \
+ } while (0)
-/* Define this to set the endianness to use in libgcc2.c, which can
- not depend on target_flags. */
-#define LIBGCC2_WORDS_BIG_ENDIAN XCHAL_HAVE_BE
+#define CPP_SPEC " %(subtarget_cpp_spec) "
-/* Show we can debug even without a frame pointer. */
-#define CAN_DEBUG_WITHOUT_FP
+#ifndef SUBTARGET_CPP_SPEC
+#define SUBTARGET_CPP_SPEC ""
+#endif
+#define EXTRA_SPECS \
+ { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC },
/* Target machine storage layout */
in instructions that operate on numbered bit-fields. */
#define BITS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
-/* Define this if most significant byte of a word is the lowest numbered. */
+/* Define this if most significant byte of a word is the lowest numbered. */
#define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
-/* Define this if most significant word of a multiword number is the lowest. */
+/* Define this if most significant word of a multiword number is the lowest. */
#define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
#define MAX_BITS_PER_WORD 32
#define INT_TYPE_SIZE 32
#define SHORT_TYPE_SIZE 16
#define LONG_TYPE_SIZE 32
-#define MAX_LONG_TYPE_SIZE 32
#define LONG_LONG_TYPE_SIZE 64
#define FLOAT_TYPE_SIZE 32
#define DOUBLE_TYPE_SIZE 64
#define LONG_DOUBLE_TYPE_SIZE 64
-/* Tell the preprocessor the maximum size of wchar_t. */
-#ifndef MAX_WCHAR_TYPE_SIZE
-#ifndef WCHAR_TYPE_SIZE
-#endif
-#endif
-
/* Allocation boundary (in *bits*) for storing pointers in memory. */
#define POINTER_BOUNDARY 32
} \
} while (0)
-/* The promotion described by `PROMOTE_MODE' should also be done for
- outgoing function arguments. */
-#define PROMOTE_FUNCTION_ARGS
-
-/* The promotion described by `PROMOTE_MODE' should also be done for
- the return value of functions. Note: `FUNCTION_VALUE' must perform
- the same promotions done by `PROMOTE_MODE'. */
-#define PROMOTE_FUNCTION_RETURN
-
/* Imitate the way many other C compilers handle alignment of
bitfields and the structures that contain them. */
#define PCC_BITFIELD_TYPE_MATTERS 1
+/* Disable the use of word-sized or smaller complex modes for structures,
+ and for function arguments in particular, where they cause problems with
+ register a7. The xtensa_copy_incoming_a7 function assumes that there is
+ a single reference to an argument in a7, but with small complex modes the
+ real and imaginary components may be extracted separately, leading to two
+ uses of the register, only one of which would be replaced. */
+#define MEMBER_TYPE_FORCES_BLK(FIELD, MODE) \
+ ((MODE) == CQImode || (MODE) == CHImode)
+
/* Align string constants and constructors to at least a word boundary.
The typical use of this macro is to increase alignment for string
constants to be word aligned so that 'strcpy' calls that copy
|| TREE_CODE (TYPE) == UNION_TYPE \
|| TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
-/* An argument declared as 'char' or 'short' in a prototype should
- actually be passed as an 'int'. */
-#define PROMOTE_PROTOTYPES 1
-
/* Operations between registers always perform the operation
on the full register even if a narrower mode is specified. */
#define WORD_REGISTER_OPERATIONS
0 - 15 AR[0] - AR[15]
16 FRAME_POINTER (fake = initial sp)
17 ARG_POINTER (fake = initial sp + framesize)
- 18 LOOP_COUNT (loop count special register)
18 BR[0] for floating-point CC
19 - 34 FR[0] - FR[15]
35 MAC16 accumulator */
#define FIRST_PSEUDO_REGISTER 36
-/* Return the stabs register number to use for REGNO. */
+/* Return the stabs register number to use for REGNO. */
#define DBX_REGISTER_NUMBER(REGNO) xtensa_dbx_register_number (REGNO)
/* 1 for registers that have pervasive standard uses
- and are not available for the register allocator. */
+ and are not available for the register allocator. */
#define FIXED_REGISTERS \
{ \
1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
incoming argument in a2 is live throughout the function and
local-alloc decides to use a2, then the incoming argument must
either be spilled or copied to another register. To get around
- this, we define ORDER_REGS_FOR_LOCAL_ALLOC to redefine
+ this, we define ADJUST_REG_ALLOC_ORDER to redefine
reg_alloc_order for leaf functions such that lowest numbered
registers are used first with the exception that the incoming
argument registers are not used until after other register choices
have been exhausted. */
#define REG_ALLOC_ORDER \
-{ 8, 9, 10, 11, 12, 13, 14, 15, 7, 6, 5, 4, 3, 2, 19, \
- 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, \
+{ 8, 9, 10, 11, 12, 13, 14, 15, 7, 6, 5, 4, 3, 2, \
+ 18, \
+ 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, \
0, 1, 16, 17, \
- 36, \
+ 35, \
}
-#define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
+#define ADJUST_REG_ALLOC_ORDER order_regs_for_local_alloc ()
/* For Xtensa, the only point of this is to prevent GCC from otherwise
giving preference to call-used registers. To minimize window
overflows for the AR registers, we want to give preference to the
lower-numbered AR registers. For other register files, which are
- not windowed, we still prefer call-used registers, if there are any. */
+ not windowed, we still prefer call-used registers, if there are any. */
extern const char xtensa_leaf_regs[FIRST_PSEUDO_REGISTER];
#define LEAF_REGISTERS xtensa_leaf_regs
/* For Xtensa, no remapping is necessary, but this macro must be
- defined if LEAF_REGISTERS is defined. */
+ defined if LEAF_REGISTERS is defined. */
#define LEAF_REG_REMAP(REGNO) (REGNO)
-/* this must be declared if LEAF_REGISTERS is set */
+/* This must be declared if LEAF_REGISTERS is set. */
extern int leaf_function;
-/* Internal macros to classify a register number. */
+/* Internal macros to classify a register number. */
/* 16 address registers + fake registers */
#define GP_REG_FIRST 0
#define GP_REG_LAST 17
#define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1)
-/* Special registers */
-#define SPEC_REG_FIRST 18
-#define SPEC_REG_LAST 18
-#define SPEC_REG_NUM (SPEC_REG_LAST - SPEC_REG_FIRST + 1)
-
/* Coprocessor registers */
#define BR_REG_FIRST 18
#define BR_REG_LAST 18
((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
/* Value is 1 if hard register REGNO can hold a value of machine-mode
- MODE. */
+ MODE. */
extern char xtensa_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
#define HARD_REGNO_MODE_OK(REGNO, MODE) \
== (GET_MODE_CLASS (MODE2) == MODE_FLOAT || \
GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT))
-/* Register to use for LCOUNT special register. */
-#define COUNT_REGISTER_REGNUM (SPEC_REG_FIRST + 0)
-
/* Register to use for pushing function arguments. */
#define STACK_POINTER_REGNUM (GP_REG_FIRST + 1)
/* The register number of the frame pointer register, which is used to
access automatic variables in the stack frame. For Xtensa, this
register never appears in the output. It is always eliminated to
- either the stack pointer or the hard frame pointer. */
+ either the stack pointer or the hard frame pointer. */
#define FRAME_POINTER_REGNUM (GP_REG_FIRST + 16)
-/* Value should be nonzero if functions must have frame pointers.
- Zero means the frame pointer need not be set up (and parms
- may be accessed via the stack pointer) in functions that seem suitable.
- This is computed in 'reload', in reload1.c. */
-#define FRAME_POINTER_REQUIRED xtensa_frame_pointer_required ()
-
/* Base register for access to arguments of the function. */
#define ARG_POINTER_REGNUM (GP_REG_FIRST + 17)
-/* If the static chain is passed in memory, these macros provide rtx
- giving 'mem' expressions that denote where they are stored.
- 'STATIC_CHAIN' and 'STATIC_CHAIN_INCOMING' give the locations as
- seen by the calling and called functions, respectively. */
-
-#define STATIC_CHAIN \
- gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, -5 * UNITS_PER_WORD))
-
-#define STATIC_CHAIN_INCOMING \
- gen_rtx_MEM (Pmode, plus_constant (arg_pointer_rtx, -5 * UNITS_PER_WORD))
-
/* For now we don't try to use the full set of boolean registers. Without
software pipelining of FP operations, there's not much to gain and it's
a real pain to get them reloaded. */
#define FPCC_REGNUM (BR_REG_FIRST + 0)
-/* Pass structure value address as an "invisible" first argument. */
-#define STRUCT_VALUE 0
-
/* It is as good or better to call a constant function address than to
call an address kept in a register. */
#define NO_FUNCTION_CSE 1
-/* It is as good or better for a function to call itself with an
- explicit address than to call an address kept in a register. */
-#define NO_RECURSIVE_FUNCTION_CSE 1
-
/* Xtensa processors have "register windows". GCC does not currently
take advantage of the possibility for variable-sized windows; instead,
we use a fixed window size of 8. */
FP_REGS, /* floating point registers */
ACC_REG, /* MAC16 accumulator */
SP_REG, /* sp register (aka a1) */
+ RL_REGS, /* preferred reload regs (not sp or fp) */
GR_REGS, /* integer registers except sp */
AR_REGS, /* all integer registers */
ALL_REGS, /* all registers */
"FP_REGS", \
"ACC_REG", \
"SP_REG", \
+ "RL_REGS", \
"GR_REGS", \
"AR_REGS", \
"ALL_REGS" \
{ 0xfff80000, 0x00000007 }, /* floating-point registers */ \
{ 0x00000000, 0x00000008 }, /* MAC16 accumulator */ \
{ 0x00000002, 0x00000000 }, /* stack pointer register */ \
+ { 0x0000ff7d, 0x00000000 }, /* preferred reload registers */ \
{ 0x0000fffd, 0x00000000 }, /* general-purpose registers */ \
{ 0x0003ffff, 0x00000000 }, /* integer registers */ \
{ 0xffffffff, 0x0000000f } /* all registers */ \
}
+#define IRA_COVER_CLASSES \
+{ \
+ BR_REGS, FP_REGS, ACC_REG, AR_REGS, LIM_REG_CLASSES \
+}
+
/* A C expression whose value is a register class containing hard
register REGNO. In general there is more that one such class;
choose a class which is "minimal", meaning that no smaller class
#define BASE_REG_CLASS AR_REGS
#define INDEX_REG_CLASS NO_REGS
-/* SMALL_REGISTER_CLASSES is required for Xtensa, because all of the
- 16 AR registers may be explicitly used in the RTL, as either
- incoming or outgoing arguments. */
-#define SMALL_REGISTER_CLASSES 1
-
-
-/* REGISTER AND CONSTANT CLASSES */
-
-/* Get reg_class from a letter such as appears in the machine
- description.
-
- Available letters: a-f,h,j-l,q,t-z,A-D,W,Y-Z
-
- DEFINED REGISTER CLASSES:
-
- 'a' general-purpose registers except sp
- 'q' sp (aka a1)
- 'D' general-purpose registers (only if density option enabled)
- 'd' general-purpose registers, including sp (only if density enabled)
- 'A' MAC16 accumulator (only if MAC16 option enabled)
- 'B' general-purpose registers (only if sext instruction enabled)
- 'C' general-purpose registers (only if mul16 option enabled)
- 'b' coprocessor boolean registers
- 'f' floating-point registers
-*/
-
-extern enum reg_class xtensa_char_to_class[256];
-
-#define REG_CLASS_FROM_LETTER(C) xtensa_char_to_class[ (int) (C) ]
-
-/* The letters I, J, K, L, M, N, O, and P in a register constraint
- string can be used to stand for particular ranges of immediate
- operands. This macro defines what the ranges are. C is the
- letter, and VALUE is a constant value. Return 1 if VALUE is
- in the range specified by C.
-
- For Xtensa:
-
- I = 12-bit signed immediate for movi
- J = 8-bit signed immediate for addi
- K = 4-bit value in (b4const U {0})
- L = 4-bit value in b4constu
- M = 7-bit value in simm7
- N = 8-bit unsigned immediate shifted left by 8 bits for addmi
- O = 4-bit value in ai4const
- P = valid immediate mask value for extui */
-
-#define CONST_OK_FOR_LETTER_P(VALUE, C) \
- ((C) == 'I' ? (xtensa_simm12b (VALUE)) \
- : (C) == 'J' ? (xtensa_simm8 (VALUE)) \
- : (C) == 'K' ? (((VALUE) == 0) || xtensa_b4const (VALUE)) \
- : (C) == 'L' ? (xtensa_b4constu (VALUE)) \
- : (C) == 'M' ? (xtensa_simm7 (VALUE)) \
- : (C) == 'N' ? (xtensa_simm8x256 (VALUE)) \
- : (C) == 'O' ? (xtensa_ai4const (VALUE)) \
- : (C) == 'P' ? (xtensa_mask_immediate (VALUE)) \
- : FALSE)
-
-
-/* Similar, but for floating constants, and defining letters G and H.
- Here VALUE is the CONST_DOUBLE rtx itself. */
-#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) (0)
-
-
-/* Other letters can be defined in a machine-dependent fashion to
- stand for particular classes of registers or other arbitrary
- operand types.
-
- R = memory that can be accessed with a 4-bit unsigned offset
- S = memory where the second word can be addressed with a 4-bit offset
- T = memory in a constant pool (addressable with a pc-relative load)
- U = memory *NOT* in a constant pool
-
- The offset range should not be checked here (except to distinguish
- denser versions of the instructions for which more general versions
- are available). Doing so leads to problems in reloading: an
- argptr-relative address may become invalid when the phony argptr is
- eliminated in favor of the stack pointer (the offset becomes too
- large to fit in the instruction's immediate field); a reload is
- generated to fix this but the RTL is not immediately updated; in
- the meantime, the constraints are checked and none match. The
- solution seems to be to simply skip the offset check here. The
- address will be checked anyway because of the code in
- GO_IF_LEGITIMATE_ADDRESS. */
-
-#define EXTRA_CONSTRAINT(OP, CODE) \
- ((GET_CODE (OP) != MEM) ? \
- ((CODE) >= 'R' && (CODE) <= 'U' \
- && reload_in_progress && GET_CODE (OP) == REG \
- && REGNO (OP) >= FIRST_PSEUDO_REGISTER) \
- : ((CODE) == 'R') ? smalloffset_mem_p (OP) \
- : ((CODE) == 'S') ? smalloffset_double_mem_p (OP) \
- : ((CODE) == 'T') ? constantpool_mem_p (OP) \
- : ((CODE) == 'U') ? !constantpool_mem_p (OP) \
- : FALSE)
+/* The small_register_classes_for_mode_p hook must always return true for
+ Xtrnase, because all of the 16 AR registers may be explicitly used in
+ the RTL, as either incoming or outgoing arguments. */
+#define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true
#define PREFERRED_RELOAD_CLASS(X, CLASS) \
- xtensa_preferred_reload_class (X, CLASS)
+ xtensa_preferred_reload_class (X, CLASS, 0)
#define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
- (CLASS)
+ xtensa_preferred_reload_class (X, CLASS, 1)
-#define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
- xtensa_secondary_reload_class (CLASS, MODE, X, 0)
-
-#define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
- xtensa_secondary_reload_class (CLASS, MODE, X, 1)
-
/* Return the maximum number of consecutive registers
needed to represent mode MODE in a register of class CLASS. */
#define CLASS_UNITS(mode, size) \
/* Offset within stack frame to start allocating local variables at. */
#define STARTING_FRAME_OFFSET \
- current_function_outgoing_args_size
+ crtl->outgoing_args_size
/* The ARG_POINTER and FRAME_POINTER are not real Xtensa registers, so
they are eliminated to either the stack pointer or hard frame pointer. */
{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
{ FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}}
-#define CAN_ELIMINATE(FROM, TO) 1
-
/* Specify the initial difference between the specified pair of registers. */
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
do { \
compute_frame_size (get_frame_size ()); \
- if ((FROM) == FRAME_POINTER_REGNUM) \
- (OFFSET) = 0; \
- else if ((FROM) == ARG_POINTER_REGNUM) \
- (OFFSET) = xtensa_current_frame_size; \
- else \
- abort (); \
+ switch (FROM) \
+ { \
+ case FRAME_POINTER_REGNUM: \
+ (OFFSET) = 0; \
+ break; \
+ case ARG_POINTER_REGNUM: \
+ (OFFSET) = xtensa_current_frame_size; \
+ break; \
+ default: \
+ gcc_unreachable (); \
+ } \
} while (0)
/* If defined, the maximum amount of space required for outgoing
arguments will be computed and placed into the variable
- 'current_function_outgoing_args_size'. No space will be pushed
+ 'crtl->outgoing_args_size'. No space will be pushed
onto the stack for each call; instead, the function prologue
should increase the stack frame size by this amount. */
#define ACCUMULATE_OUTGOING_ARGS 1
128-bit datatypes defined in TIE (e.g., for Vectra). */
#define STACK_BOUNDARY 128
-/* Functions do not pop arguments off the stack. */
-#define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, SIZE) 0
-
/* Use a fixed register window size of 8. */
#define WINDOW_SIZE 8
/* Don't worry about compatibility with PCC. */
#define DEFAULT_PCC_STRUCT_RETURN 0
-/* For Xtensa, we would like to be able to return up to 6 words in
- memory but GCC cannot support that. The return value must be given
- one of the standard MODE_INT modes, and there is no 6 word mode.
- Instead, if we try to return a 6 word structure, GCC selects the
- next biggest mode (OImode, 8 words) and then the register allocator
- fails because there is no 8-register group beginning with a10. So
- we have to fall back on the next largest size which is 4 words... */
-#define RETURN_IN_MEMORY(TYPE) \
- ((unsigned HOST_WIDE_INT) int_size_in_bytes (TYPE) > 4 * UNITS_PER_WORD)
-
/* Define how to find the value returned by a library function
assuming the value has mode MODE. Because we have defined
- PROMOTE_FUNCTION_RETURN, we have to perform the same promotions as
- PROMOTE_MODE. */
+ TARGET_PROMOTE_FUNCTION_MODE to promote everything, we have to
+ perform the same promotions as PROMOTE_MODE. */
#define XTENSA_LIBCALL_VALUE(MODE, OUTGOINGP) \
gen_rtx_REG ((GET_MODE_CLASS (MODE) == MODE_INT \
&& GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
#define LIBCALL_OUTGOING_VALUE(MODE) \
XTENSA_LIBCALL_VALUE ((MODE), 1)
-/* Define how to find the value returned by a function.
- VALTYPE is the data type of the value (as a tree).
- If the precise function being called is known, FUNC is its FUNCTION_DECL;
- otherwise, FUNC is 0. */
-#define XTENSA_FUNCTION_VALUE(VALTYPE, FUNC, OUTGOINGP) \
- gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE) \
- && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \
- ? SImode: TYPE_MODE (VALTYPE), \
- OUTGOINGP ? GP_OUTGOING_RETURN : GP_RETURN)
-
-#define FUNCTION_VALUE(VALTYPE, FUNC) \
- XTENSA_FUNCTION_VALUE (VALTYPE, FUNC, 0)
-
-#define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \
- XTENSA_FUNCTION_VALUE (VALTYPE, FUNC, 1)
-
/* A C expression that is nonzero if REGNO is the number of a hard
register in which the values of called function may come back. A
register whose use for returning values is limited to serving as
be recognized by this macro. If the machine has register windows,
so that the caller and the called function use different registers
for the return value, this macro should recognize only the caller's
- register numbers. */
+ register numbers. */
#define FUNCTION_VALUE_REGNO_P(N) \
((N) == GP_RETURN)
does *not* include implicit arguments such as the static chain and
the structure-value address. On many machines, no registers can be
used for this purpose since all function arguments are pushed on
- the stack. */
+ the stack. */
#define FUNCTION_ARG_REGNO_P(N) \
((N) >= GP_OUTGOING_ARG_FIRST && (N) <= GP_OUTGOING_ARG_LAST)
-/* Use IEEE floating-point format. */
-#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
-
-/* Define a data type for recording info about an argument list
- during the scan of that argument list. This data type should
- hold all necessary information about the function itself
- and about the args processed so far, enough to enable macros
- such as FUNCTION_ARG to determine where the next arg should go. */
-typedef struct xtensa_args {
- int arg_words; /* # total words the arguments take */
+/* Record the number of argument words seen so far, along with a flag to
+ indicate whether these are incoming arguments. (FUNCTION_INCOMING_ARG
+ is used for both incoming and outgoing args, so a separate flag is
+ needed. */
+typedef struct xtensa_args
+{
+ int arg_words;
+ int incoming;
} CUMULATIVE_ARGS;
-/* Initialize a variable CUM of type CUMULATIVE_ARGS
- for a call to a function whose data type is FNTYPE.
- For a library call, FNTYPE is 0. */
-#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
- init_cumulative_args (&CUM, FNTYPE, LIBNAME)
+#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
+ init_cumulative_args (&CUM, 0)
#define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) \
- init_cumulative_args (&CUM, FNTYPE, LIBNAME)
-
-/* Update the data in CUM to advance over an argument
- of mode MODE and data type TYPE.
- (TYPE is null for libcalls where that information may not be available.) */
-#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
- function_arg_advance (&CUM, MODE, TYPE)
-
-#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
- function_arg (&CUM, MODE, TYPE, FALSE)
-
-#define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
- function_arg (&CUM, MODE, TYPE, TRUE)
-
-/* Arguments are never passed partly in memory and partly in registers. */
-#define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) (0)
-
-/* Specify function argument alignment. */
-#define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \
- ((TYPE) != 0 \
- ? (TYPE_ALIGN (TYPE) <= PARM_BOUNDARY \
- ? PARM_BOUNDARY \
- : TYPE_ALIGN (TYPE)) \
- : (GET_MODE_ALIGNMENT (MODE) <= PARM_BOUNDARY \
- ? PARM_BOUNDARY \
- : GET_MODE_ALIGNMENT (MODE)))
-
-
-/* Nonzero if we do not know how to pass TYPE solely in registers.
- We cannot do so in the following cases:
-
- - if the type has variable size
- - if the type is marked as addressable (it is required to be constructed
- into the stack)
-
- This differs from the default in that it does not check if the padding
- and mode of the type are such that a copy into a register would put it
- into the wrong part of the register. */
-
-#define MUST_PASS_IN_STACK(MODE, TYPE) \
- ((TYPE) != 0 \
- && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \
- || TREE_ADDRESSABLE (TYPE)))
-
-/* Output assembler code to FILE to increment profiler label LABELNO
- for profiling a function entry.
-
- The mcount code in glibc doesn't seem to use this LABELNO stuff.
- Some ports (e.g., MIPS) don't even bother to pass the label
- address, and even those that do (e.g., i386) don't seem to use it.
- The information needed by mcount() is the current PC and the
- current return address, so that mcount can identify an arc in the
- call graph. For Xtensa, we pass the current return address as
- the first argument to mcount, and the current PC is available as
- a0 in mcount's register window. Both of these values contain
- window size information in the two most significant bits; we assume
- that the mcount code will mask off those bits. The call to mcount
- uses a window size of 8 to make sure that mcount doesn't clobber
- any incoming argument values. */
-
-#define FUNCTION_PROFILER(FILE, LABELNO) \
+ init_cumulative_args (&CUM, 1)
+
+#define FUNCTION_ARG_BOUNDARY function_arg_boundary
+
+/* Profiling Xtensa code is typically done with the built-in profiling
+ feature of Tensilica's instruction set simulator, which does not
+ require any compiler support. Profiling code on a real (i.e.,
+ non-simulated) Xtensa processor is currently only supported by
+ GNU/Linux with glibc. The glibc version of _mcount doesn't require
+ counter variables. The _mcount function needs the current PC and
+ the current return address to identify an arc in the call graph.
+ Pass the current return address as the first argument; the current
+ PC is available as a0 in _mcount's register window. Both of these
+ values contain window size information in the two most significant
+ bits; we assume that _mcount will mask off those bits. The call to
+ _mcount uses a window size of 8 to make sure that it doesn't clobber
+ any incoming argument values. */
+
+#define NO_PROFILE_COUNTERS 1
+
+#define FUNCTION_PROFILER(FILE, LABELNO) \
do { \
- fprintf (FILE, "\taddi\t%s, %s, 0\t# save current return address\n", \
- reg_names[GP_REG_FIRST+10], \
- reg_names[GP_REG_FIRST+0]); \
- fprintf (FILE, "\tcall8\t_mcount\n"); \
- } while (0);
+ fprintf (FILE, "\t%s\ta10, a0\n", TARGET_DENSITY ? "mov.n" : "mov"); \
+ if (flag_pic) \
+ { \
+ fprintf (FILE, "\tmovi\ta8, _mcount@PLT\n"); \
+ fprintf (FILE, "\tcallx8\ta8\n"); \
+ } \
+ else \
+ fprintf (FILE, "\tcall8\t_mcount\n"); \
+ } while (0)
/* Stack pointer value doesn't matter at exit. */
#define EXIT_IGNORE_STACK 1
-/* A C statement to output, on the stream FILE, assembler code for a
- block of data that contains the constant parts of a trampoline.
- This code should not include a label--the label is taken care of
- automatically.
-
- For Xtensa, the trampoline must perform an entry instruction with a
- minimal stack frame in order to get some free registers. Once the
- actual call target is known, the proper stack frame size is extracted
- from the entry instruction at the target and the current frame is
- adjusted to match. The trampoline then transfers control to the
- instruction following the entry at the target. Note: this assumes
- that the target begins with an entry instruction. */
-
-/* minimum frame = reg save area (4 words) plus static chain (1 word)
- and the total number of words must be a multiple of 128 bits */
-#define MIN_FRAME_SIZE (8 * UNITS_PER_WORD)
-
-#define TRAMPOLINE_TEMPLATE(STREAM) \
- do { \
- fprintf (STREAM, "\t.begin no-generics\n"); \
- fprintf (STREAM, "\tentry\tsp, %d\n", MIN_FRAME_SIZE); \
- \
- /* GCC isn't prepared to deal with data at the beginning of the \
- trampoline, and the Xtensa l32r instruction requires that the \
- constant pool be located before the code. We put the constant \
- pool in the middle of the trampoline and jump around it. */ \
- \
- fprintf (STREAM, "\tj\t.Lskipconsts\n"); \
- fprintf (STREAM, "\t.align\t4\n"); \
- fprintf (STREAM, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); \
- fprintf (STREAM, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); \
- fprintf (STREAM, ".Lskipconsts:\n"); \
- \
- /* store the static chain */ \
- fprintf (STREAM, "\tl32r\ta8, .Lchainval\n"); \
- fprintf (STREAM, "\ts32i\ta8, sp, %d\n", \
- MIN_FRAME_SIZE - (5 * UNITS_PER_WORD)); \
- \
- /* set the proper stack pointer value */ \
- fprintf (STREAM, "\tl32r\ta8, .Lfnaddr\n"); \
- fprintf (STREAM, "\tl32i\ta9, a8, 0\n"); \
- fprintf (STREAM, "\textui\ta9, a9, %d, 12\n", \
- TARGET_BIG_ENDIAN ? 8 : 12); \
- fprintf (STREAM, "\tslli\ta9, a9, 3\n"); \
- fprintf (STREAM, "\taddi\ta9, a9, %d\n", -MIN_FRAME_SIZE); \
- fprintf (STREAM, "\tsub\ta9, sp, a9\n"); \
- fprintf (STREAM, "\tmovsp\tsp, a9\n"); \
- \
- /* jump to the instruction following the entry */ \
- fprintf (STREAM, "\taddi\ta8, a8, 3\n"); \
- fprintf (STREAM, "\tjx\ta8\n"); \
- fprintf (STREAM, "\t.end no-generics\n"); \
- } while (0)
-
-/* Size in bytes of the trampoline, as an integer. */
-#define TRAMPOLINE_SIZE 49
+/* Size in bytes of the trampoline, as an integer. Make sure this is
+ a multiple of TRAMPOLINE_ALIGNMENT to avoid -Wpadded warnings. */
+#define TRAMPOLINE_SIZE (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS ? 60 : 52)
/* Alignment required for trampolines, in bits. */
-#define TRAMPOLINE_ALIGNMENT (32)
-
-/* A C statement to initialize the variable parts of a trampoline. */
-#define INITIALIZE_TRAMPOLINE(ADDR, FUNC, CHAIN) \
- do { \
- rtx addr = ADDR; \
- emit_move_insn (gen_rtx_MEM (SImode, plus_constant (addr, 8)), FUNC); \
- emit_move_insn (gen_rtx_MEM (SImode, plus_constant (addr, 12)), CHAIN); \
- emit_library_call (gen_rtx (SYMBOL_REF, Pmode, "__xtensa_sync_caches"), \
- 0, VOIDmode, 1, addr, Pmode); \
- } while (0)
-
-/* Define the `__builtin_va_list' type for the ABI. */
-#define BUILD_VA_LIST_TYPE(VALIST) \
- (VALIST) = xtensa_build_va_list ()
-
-/* If defined, is a C expression that produces the machine-specific
- code for a call to '__builtin_saveregs'. This code will be moved
- to the very beginning of the function, before any parameter access
- are made. The return value of this function should be an RTX that
- contains the value to use as the return of '__builtin_saveregs'. */
-#define EXPAND_BUILTIN_SAVEREGS \
- xtensa_builtin_saveregs
-
-/* Implement `va_start' for varargs and stdarg. */
-#define EXPAND_BUILTIN_VA_START(stdarg, valist, nextarg) \
- xtensa_va_start (stdarg, valist, nextarg)
-
-/* Implement `va_arg'. */
-#define EXPAND_BUILTIN_VA_ARG(valist, type) \
- xtensa_va_arg (valist, type)
+#define TRAMPOLINE_ALIGNMENT 32
/* If defined, a C expression that produces the machine-specific code
to setup the stack so that arbitrary frames can be accessed.
specify whether to start from the stack pointer or frame pointer. That
would also allow us to skip the machine->accesses_prev_frame stuff that
we currently need to ensure that there is a frame pointer when these
- builtin functions are used. */
+ builtin functions are used. */
-#define SETUP_FRAME_ADDRESSES() \
- xtensa_setup_frame_addresses ()
+#define SETUP_FRAME_ADDRESSES xtensa_setup_frame_addresses
/* A C expression whose value is RTL representing the address in a
stack frame where the pointer to the caller's frame is stored.
macro is used for continuing to walk back up the stack, so it must
return the stack pointer address. Thus, there is some inconsistency
here in that __builtin_frame_address will return the frame pointer
- when count == 0 and the stack pointer when count > 0. */
+ when count == 0 and the stack pointer when count > 0. */
#define DYNAMIC_CHAIN_ADDRESS(frame) \
- gen_rtx (PLUS, Pmode, frame, \
- gen_rtx_CONST_INT (VOIDmode, -3 * UNITS_PER_WORD))
+ gen_rtx_PLUS (Pmode, frame, GEN_INT (-3 * UNITS_PER_WORD))
/* Define this if the return address of a particular stack frame is
- accessed from the frame pointer of the previous stack frame. */
+ accessed from the frame pointer of the previous stack frame. */
#define RETURN_ADDR_IN_PREVIOUS_FRAME
/* A C expression whose value is RTL representing the value of the
return address for the frame COUNT steps up from the current
- frame, after the prologue. FRAMEADDR is the frame pointer of the
- COUNT frame, or the frame pointer of the COUNT - 1 frame if
- 'RETURN_ADDR_IN_PREVIOUS_FRAME' is defined.
-
- The 2 most-significant bits of the return address on Xtensa hold
- the register window size. To get the real return address, these bits
- must be masked off and replaced with the high bits from the current
- PC. Since it is unclear how the __builtin_return_address function
- is used, the current code does not do this masking and simply returns
- the raw return address from the a0 register. */
-#define RETURN_ADDR_RTX(count, frame) \
- ((count) == -1 \
- ? gen_rtx_REG (Pmode, 0) \
- : gen_rtx_MEM (Pmode, memory_address \
- (Pmode, plus_constant (frame, -4 * UNITS_PER_WORD))))
-
+ frame, after the prologue. */
+#define RETURN_ADDR_RTX xtensa_return_addr
/* Addressing modes, and classification of registers for them. */
/* C expressions which are nonzero if register number NUM is suitable
- for use as a base or index register in operand addresses. It may
- be either a suitable hard register or a pseudo register that has
- been allocated such a hard register. The difference between an
- index register and a base register is that the index register may
- be scaled. */
+ for use as a base or index register in operand addresses. */
+#define REGNO_OK_FOR_INDEX_P(NUM) 0
#define REGNO_OK_FOR_BASE_P(NUM) \
(GP_REG_P (NUM) || GP_REG_P ((unsigned) reg_renumber[NUM]))
-#define REGNO_OK_FOR_INDEX_P(NUM) 0
-
/* C expressions that are nonzero if X (assumed to be a `reg' RTX) is
- valid for use as a base or index register. For hard registers, it
- should always accept those which the hardware permits and reject
- the others. Whether the macro accepts or rejects pseudo registers
- must be controlled by `REG_OK_STRICT'. This usually requires two
- variant definitions, of which `REG_OK_STRICT' controls the one
- actually used. The difference between an index register and a base
- register is that the index register may be scaled. */
+ valid for use as a base or index register. */
#ifdef REG_OK_STRICT
+#define REG_OK_STRICT_FLAG 1
+#else
+#define REG_OK_STRICT_FLAG 0
+#endif
-#define REG_OK_FOR_INDEX_P(X) 0
-#define REG_OK_FOR_BASE_P(X) \
- REGNO_OK_FOR_BASE_P (REGNO (X))
-
-#else /* !REG_OK_STRICT */
+#define BASE_REG_P(X, STRICT) \
+ ((!(STRICT) && REGNO (X) >= FIRST_PSEUDO_REGISTER) \
+ || REGNO_OK_FOR_BASE_P (REGNO (X)))
#define REG_OK_FOR_INDEX_P(X) 0
-#define REG_OK_FOR_BASE_P(X) \
- ((REGNO (X) >= FIRST_PSEUDO_REGISTER) || (GP_REG_P (REGNO (X))))
-
-#endif /* !REG_OK_STRICT */
+#define REG_OK_FOR_BASE_P(X) BASE_REG_P (X, REG_OK_STRICT_FLAG)
/* Maximum number of registers that can appear in a valid memory address. */
#define MAX_REGS_PER_ADDRESS 1
-/* Identify valid Xtensa addresses. */
-#define GO_IF_LEGITIMATE_ADDRESS(MODE, ADDR, LABEL) \
- do { \
- rtx xinsn = (ADDR); \
- \
- /* allow constant pool addresses */ \
- if ((MODE) != BLKmode && GET_MODE_SIZE (MODE) >= UNITS_PER_WORD \
- && constantpool_address_p (xinsn)) \
- goto LABEL; \
- \
- while (GET_CODE (xinsn) == SUBREG) \
- xinsn = SUBREG_REG (xinsn); \
- \
- /* allow base registers */ \
- if (GET_CODE (xinsn) == REG && REG_OK_FOR_BASE_P (xinsn)) \
- goto LABEL; \
- \
- /* check for "register + offset" addressing */ \
- if (GET_CODE (xinsn) == PLUS) \
- { \
- rtx xplus0 = XEXP (xinsn, 0); \
- rtx xplus1 = XEXP (xinsn, 1); \
- enum rtx_code code0; \
- enum rtx_code code1; \
- \
- while (GET_CODE (xplus0) == SUBREG) \
- xplus0 = SUBREG_REG (xplus0); \
- code0 = GET_CODE (xplus0); \
- \
- while (GET_CODE (xplus1) == SUBREG) \
- xplus1 = SUBREG_REG (xplus1); \
- code1 = GET_CODE (xplus1); \
- \
- /* swap operands if necessary so the register is first */ \
- if (code0 != REG && code1 == REG) \
- { \
- xplus0 = XEXP (xinsn, 1); \
- xplus1 = XEXP (xinsn, 0); \
- code0 = GET_CODE (xplus0); \
- code1 = GET_CODE (xplus1); \
- } \
- \
- if (code0 == REG && REG_OK_FOR_BASE_P (xplus0) \
- && code1 == CONST_INT \
- && xtensa_mem_offset (INTVAL (xplus1), (MODE))) \
- { \
- goto LABEL; \
- } \
- } \
- } while (0)
-
/* A C expression that is 1 if the RTX X is a constant which is a
valid address. This is defined to be the same as 'CONSTANT_P (X)',
but rejecting CONST_DOUBLE. */
|| (GET_CODE (X) == CONST)))
/* Nonzero if the constant value X is a legitimate general operand.
- It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
-#define LEGITIMATE_CONSTANT_P(X) 1
+ It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
+#define LEGITIMATE_CONSTANT_P(X) (! xtensa_tls_referenced_p (X))
/* A C expression that is nonzero if X is a legitimate immediate
operand on the target machine when generating position independent
code. */
#define LEGITIMATE_PIC_OPERAND_P(X) \
- ((GET_CODE (X) != SYMBOL_REF || SYMBOL_REF_FLAG (X)) \
+ ((GET_CODE (X) != SYMBOL_REF \
+ || (SYMBOL_REF_LOCAL_P (X) && !SYMBOL_REF_EXTERNAL_P (X))) \
&& GET_CODE (X) != LABEL_REF \
&& GET_CODE (X) != CONST)
-/* Tell GCC how to use ADDMI to generate addresses. */
-#define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
- do { \
- rtx xinsn = (X); \
- if (GET_CODE (xinsn) == PLUS) \
- { \
- rtx plus0 = XEXP (xinsn, 0); \
- rtx plus1 = XEXP (xinsn, 1); \
- \
- if (GET_CODE (plus0) != REG && GET_CODE (plus1) == REG) \
- { \
- plus0 = XEXP (xinsn, 1); \
- plus1 = XEXP (xinsn, 0); \
- } \
- \
- if (GET_CODE (plus0) == REG \
- && GET_CODE (plus1) == CONST_INT \
- && !xtensa_mem_offset (INTVAL (plus1), MODE) \
- && !xtensa_simm8 (INTVAL (plus1)) \
- && xtensa_mem_offset (INTVAL (plus1) & 0xff, MODE) \
- && xtensa_simm8x256 (INTVAL (plus1) & ~0xff)) \
- { \
- rtx temp = gen_reg_rtx (Pmode); \
- emit_insn (gen_rtx (SET, Pmode, temp, \
- gen_rtx (PLUS, Pmode, plus0, \
- GEN_INT (INTVAL (plus1) & ~0xff)))); \
- (X) = gen_rtx (PLUS, Pmode, temp, \
- GEN_INT (INTVAL (plus1) & 0xff)); \
- goto WIN; \
- } \
- } \
- } while (0)
-
-
/* Treat constant-pool references as "mode dependent" since they can
only be accessed with SImode loads. This works around a bug in the
combiner where a constant pool reference is temporarily converted
for the index in the tablejump instruction. */
#define CASE_VECTOR_MODE (SImode)
-/* Define this if the tablejump instruction expects the table
- to contain offsets from the address of the table.
- Do not define this if the table should contain absolute addresses. */
-/* #define CASE_VECTOR_PC_RELATIVE */
-
/* Define this as 1 if 'char' should by default be signed; else as 0. */
#define DEFAULT_SIGNED_CHAR 0
/* Prefer word-sized loads. */
#define SLOW_BYTE_ACCESS 1
-/* Xtensa doesn't have any instructions that set integer values based on the
- results of comparisons, but the simplification code in the combiner also
- uses this macro. The value should be either 1 or -1 to enable some
- optimizations in the combiner; I'm not sure which is better for us.
- Since we've been using 1 for a while, it should probably stay that way for
- compatibility. */
-#define STORE_FLAG_VALUE 1
-
/* Shift instructions ignore all but the low-order few bits. */
#define SHIFT_COUNT_TRUNCATED 1
/* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
- is done just by pretending it is already truncated. */
+ is done just by pretending it is already truncated. */
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
+#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)
+#define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = -1, 1)
+
/* Specify the machine mode that pointers have.
After generation of rtl, the compiler makes no further distinction
between pointers and any other objects of this machine mode. */
indexing purposes) so give the MEM rtx a words's mode. */
#define FUNCTION_MODE SImode
-/* A C expression that evaluates to true if it is ok to perform a
- sibling call to DECL. */
-/* TODO: fix this up to allow at least some sibcalls */
-#define FUNCTION_OK_FOR_SIBCALL(DECL) 0
-
-/* Xtensa constant costs. */
-#define CONST_COSTS(X, CODE, OUTER_CODE) \
- case CONST_INT: \
- switch (OUTER_CODE) \
- { \
- case SET: \
- if (xtensa_simm12b (INTVAL (X))) return 4; \
- break; \
- case PLUS: \
- if (xtensa_simm8 (INTVAL (X))) return 0; \
- if (xtensa_simm8x256 (INTVAL (X))) return 0; \
- break; \
- case AND: \
- if (xtensa_mask_immediate (INTVAL (X))) return 0; \
- break; \
- case COMPARE: \
- if ((INTVAL (X) == 0) || xtensa_b4const (INTVAL (X))) return 0; \
- break; \
- case ASHIFT: \
- case ASHIFTRT: \
- case LSHIFTRT: \
- case ROTATE: \
- case ROTATERT: \
- /* no way to tell if X is the 2nd operand so be conservative */ \
- default: break; \
- } \
- if (xtensa_simm12b (INTVAL (X))) return 5; \
- return 6; \
- case CONST: \
- case LABEL_REF: \
- case SYMBOL_REF: \
- return 5; \
- case CONST_DOUBLE: \
- return 7;
-
-/* Costs of various Xtensa operations. */
-#define RTX_COSTS(X, CODE, OUTER_CODE) \
- case MEM: \
- { \
- int num_words = \
- (GET_MODE_SIZE (GET_MODE (X)) > UNITS_PER_WORD) ? 2 : 1; \
- if (memory_address_p (GET_MODE (X), XEXP ((X), 0))) \
- return COSTS_N_INSNS (num_words); \
- \
- return COSTS_N_INSNS (2*num_words); \
- } \
- \
- case FFS: \
- return COSTS_N_INSNS (TARGET_NSA ? 5 : 50); \
- \
- case NOT: \
- return COSTS_N_INSNS ((GET_MODE (X) == DImode) ? 3 : 2); \
- \
- case AND: \
- case IOR: \
- case XOR: \
- if (GET_MODE (X) == DImode) return COSTS_N_INSNS (2); \
- return COSTS_N_INSNS (1); \
- \
- case ASHIFT: \
- case ASHIFTRT: \
- case LSHIFTRT: \
- if (GET_MODE (X) == DImode) return COSTS_N_INSNS (50); \
- return COSTS_N_INSNS (1); \
- \
- case ABS: \
- { \
- enum machine_mode xmode = GET_MODE (X); \
- if (xmode == SFmode) \
- return COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); \
- if (xmode == DFmode) \
- return COSTS_N_INSNS (50); \
- return COSTS_N_INSNS (4); \
- } \
- \
- case PLUS: \
- case MINUS: \
- { \
- enum machine_mode xmode = GET_MODE (X); \
- if (xmode == SFmode) \
- return COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); \
- if (xmode == DFmode || xmode == DImode) \
- return COSTS_N_INSNS (50); \
- return COSTS_N_INSNS (1); \
- } \
- \
- case NEG: \
- return COSTS_N_INSNS ((GET_MODE (X) == DImode) ? 4 : 2); \
- \
- case MULT: \
- { \
- enum machine_mode xmode = GET_MODE (X); \
- if (xmode == SFmode) \
- return COSTS_N_INSNS (TARGET_HARD_FLOAT ? 4 : 50); \
- if (xmode == DFmode || xmode == DImode) \
- return COSTS_N_INSNS (50); \
- if (TARGET_MUL32) \
- return COSTS_N_INSNS (4); \
- if (TARGET_MAC16) \
- return COSTS_N_INSNS (16); \
- if (TARGET_MUL16) \
- return COSTS_N_INSNS (12); \
- return COSTS_N_INSNS (50); \
- } \
- \
- case DIV: \
- case MOD: \
- { \
- enum machine_mode xmode = GET_MODE (X); \
- if (xmode == SFmode) \
- return COSTS_N_INSNS (TARGET_HARD_FLOAT_DIV ? 8 : 50); \
- if (xmode == DFmode) \
- return COSTS_N_INSNS (50); \
- } \
- /* fall through */ \
- \
- case UDIV: \
- case UMOD: \
- { \
- enum machine_mode xmode = GET_MODE (X); \
- if (xmode == DImode) \
- return COSTS_N_INSNS (50); \
- if (TARGET_DIV32) \
- return COSTS_N_INSNS (32); \
- return COSTS_N_INSNS (50); \
- } \
- \
- case SQRT: \
- if (GET_MODE (X) == SFmode) \
- return COSTS_N_INSNS (TARGET_HARD_FLOAT_SQRT ? 8 : 50); \
- return COSTS_N_INSNS (50); \
- \
- case SMIN: \
- case UMIN: \
- case SMAX: \
- case UMAX: \
- return COSTS_N_INSNS (TARGET_MINMAX ? 1 : 50); \
- \
- case SIGN_EXTRACT: \
- case SIGN_EXTEND: \
- return COSTS_N_INSNS (TARGET_SEXT ? 1 : 2); \
- \
- case ZERO_EXTRACT: \
- case ZERO_EXTEND: \
- return COSTS_N_INSNS (1);
-
-
-/* An expression giving the cost of an addressing mode that
- contains ADDRESS. */
-#define ADDRESS_COST(ADDR) 1
-
/* A C expression for the cost of moving data from a register in
class FROM to one in class TO. The classes are expressed using
the enumeration values such as 'GENERAL_REGS'. A value of 2 is
#define MEMORY_MOVE_COST(MODE, CLASS, IN) 4
-#define BRANCH_COST 3
-
-/* Optionally define this if you have added predicates to
- 'MACHINE.c'. This macro is called within an initializer of an
- array of structures. The first field in the structure is the
- name of a predicate and the second field is an array of rtl
- codes. For each predicate, list all rtl codes that can be in
- expressions matched by the predicate. The list should have a
- trailing comma. */
-
-#define PREDICATE_CODES \
- {"add_operand", { REG, CONST_INT, SUBREG }}, \
- {"arith_operand", { REG, CONST_INT, SUBREG }}, \
- {"nonimmed_operand", { REG, SUBREG, MEM }}, \
- {"mem_operand", { MEM }}, \
- {"mask_operand", { REG, CONST_INT, SUBREG }}, \
- {"extui_fldsz_operand", { CONST_INT }}, \
- {"sext_fldsz_operand", { CONST_INT }}, \
- {"lsbitnum_operand", { CONST_INT }}, \
- {"fpmem_offset_operand", { CONST_INT }}, \
- {"sext_operand", { REG, SUBREG, MEM }}, \
- {"branch_operand", { REG, CONST_INT, SUBREG }}, \
- {"ubranch_operand", { REG, CONST_INT, SUBREG }}, \
- {"call_insn_operand", { CONST_INT, CONST, SYMBOL_REF, REG }}, \
- {"move_operand", { REG, SUBREG, MEM, CONST_INT, CONST_DOUBLE, \
- CONST, SYMBOL_REF, LABEL_REF }}, \
- {"non_const_move_operand", { REG, SUBREG, MEM }}, \
- {"const_float_1_operand", { CONST_DOUBLE }}, \
- {"branch_operator", { EQ, NE, LT, GE }}, \
- {"ubranch_operator", { LTU, GEU }}, \
- {"boolean_operator", { EQ, NE }},
-
-/* Control the assembler format that we output. */
+#define BRANCH_COST(speed_p, predictable_p) 3
/* How to refer to registers in assembler output.
- This sequence is indexed by compiler's hard-register-number (see above). */
+ This sequence is indexed by compiler's hard-register-number (see above). */
#define REGISTER_NAMES \
{ \
"a0", "sp", "a2", "a3", "a4", "a5", "a6", "a7", \
/* If defined, a C initializer for an array of structures containing a
name and a register number. This macro defines additional names
for hard registers, thus allowing the 'asm' option in declarations
- to refer to registers using alternate names. */
+ to refer to registers using alternate names. */
#define ADDITIONAL_REGISTER_NAMES \
{ \
{ "a1", 1 + GP_REG_FIRST } \
constants. Used for PIC-specific UNSPECs. */
#define OUTPUT_ADDR_CONST_EXTRA(STREAM, X, FAIL) \
do { \
- if (flag_pic && GET_CODE (X) == UNSPEC && XVECLEN ((X), 0) == 1) \
- { \
- switch (XINT ((X), 1)) \
- { \
- case UNSPEC_PLT: \
- output_addr_const ((STREAM), XVECEXP ((X), 0, 0)); \
- fputs ("@PLT", (STREAM)); \
- break; \
- default: \
- goto FAIL; \
- } \
- break; \
- } \
- else \
+ if (xtensa_output_addr_const_extra (STREAM, X) == FALSE) \
goto FAIL; \
} while (0)
+/* Globalizing directive for a label. */
+#define GLOBAL_ASM_OP "\t.global\t"
-/* This is how to output the definition of a user-level label named NAME,
- such as the label on a static function or variable NAME. */
-#define ASM_OUTPUT_LABEL(STREAM, NAME) \
- do { \
- assemble_name (STREAM, NAME); \
- fputs (":\n", STREAM); \
- } while (0)
-
-/* This is how to output a command to make the user-level label named NAME
- defined for reference from other files. */
-#define ASM_GLOBALIZE_LABEL(STREAM, NAME) \
- do { \
- fputs ("\t.global\t", STREAM); \
- assemble_name (STREAM, NAME); \
- fputs ("\n", STREAM); \
- } while (0)
-
-/* This says how to define a global common symbol. */
-#define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
- xtensa_declare_object (STREAM, NAME, "\n\t.comm\t", ",%u\n", (SIZE))
-
-/* This says how to define a local common symbol (ie, not visible to
- linker). */
-#define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \
- xtensa_declare_object (STREAM, NAME, "\n\t.lcomm\t", ",%u\n", (SIZE))
+/* Declare an uninitialized external linkage data object. */
+#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
+ asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
/* This is how to output an element of a case-vector that is absolute. */
#define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
LOCAL_LABEL_PREFIX, VALUE)
/* This is how to output an element of a case-vector that is relative.
- This is used for pc-relative code. */
+ This is used for pc-relative code. */
#define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
do { \
fprintf (STREAM, "%s%sL%u-%sL%u\n", integer_asm_op (4, TRUE), \
#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
-/* Define this macro for the rare case where the RTL needs some sort of
- machine-dependent fixup immediately before register allocation is done.
-
- If the stack frame size is too big to fit in the immediate field of
- the ENTRY instruction, we need to store the frame size in the
- constant pool. However, the code in xtensa_function_prologue runs too
- late to be able to add anything to the constant pool. Since the
- final frame size isn't known until reload is complete, this seems
- like the best place to do it.
-
- There may also be some fixup required if there is an incoming argument
- in a7 and the function requires a frame pointer. */
-
-#define MACHINE_DEPENDENT_REORG(INSN) xtensa_reorg (INSN)
-
-
/* Define the strings to put out for each section in the object file. */
-#define TEXT_SECTION_ASM_OP "\t.text" /* instructions */
-#define DATA_SECTION_ASM_OP "\t.data" /* large data */
+#define TEXT_SECTION_ASM_OP "\t.text"
+#define DATA_SECTION_ASM_OP "\t.data"
+#define BSS_SECTION_ASM_OP "\t.section\t.bss"
-/* Define output to appear before the constant pool. If the function
- has been assigned to a specific ELF section, or if it goes into a
- unique section, set the name of that section to be the literal
- prefix. */
+/* Define output to appear before the constant pool. */
#define ASM_OUTPUT_POOL_PROLOGUE(FILE, FUNNAME, FUNDECL, SIZE) \
do { \
- tree fnsection; \
- resolve_unique_section ((FUNDECL), 0, flag_function_sections); \
- fnsection = DECL_SECTION_NAME (FUNDECL); \
- if (fnsection != NULL_TREE) \
- { \
- const char *fnsectname = TREE_STRING_POINTER (fnsection); \
- fprintf (FILE, "\t.begin\tliteral_prefix %s\n", \
- strcmp (fnsectname, ".text") ? fnsectname : ""); \
- } \
if ((SIZE) > 0) \
{ \
- function_section (FUNDECL); \
+ resolve_unique_section ((FUNDECL), 0, flag_function_sections); \
+ switch_to_section (function_section (FUNDECL)); \
fprintf (FILE, "\t.literal_position\n"); \
} \
} while (0)
-/* Define code to write out the ".end literal_prefix" directive for a
- function in a special section. This is appended to the standard ELF
- code for ASM_DECLARE_FUNCTION_SIZE. */
-#define XTENSA_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
- if (DECL_SECTION_NAME (DECL) != NULL_TREE) \
- fprintf (FILE, "\t.end\tliteral_prefix\n")
-
/* A C statement (with or without semicolon) to output a constant in
the constant pool, if it needs special treatment. */
#define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) \
goto JUMPTO; \
} while (0)
-/* Store in OUTPUT a string (made with alloca) containing
- an assembler-name for a local static variable named NAME.
- LABELNO is an integer which is different for each call. */
-#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
- do { \
- (OUTPUT) = (char *) alloca (strlen (NAME) + 10); \
- sprintf ((OUTPUT), "%s.%u", (NAME), (LABELNO)); \
- } while (0)
-
-/* How to start an assembler comment. */
+/* How to start an assembler comment. */
#define ASM_COMMENT_START "#"
-/* Exception handling TODO!! */
-#define DWARF_UNWIND_INFO 0
+/* Exception handling. Xtensa uses much of the standard DWARF2 unwinding
+ machinery, but the variable size register window save areas are too
+ complicated to efficiently describe with CFI entries. The CFA must
+ still be specified in DWARF so that DW_AT_frame_base is set correctly
+ for debugging. */
+#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, 0)
+#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (0)
+#define DWARF_FRAME_REGISTERS 16
+#define EH_RETURN_DATA_REGNO(N) ((N) < 2 ? (N) + 2 : INVALID_REGNUM)
+#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
+ (flag_pic \
+ ? (((GLOBAL) ? DW_EH_PE_indirect : 0) \
+ | DW_EH_PE_pcrel | DW_EH_PE_sdata4) \
+ : DW_EH_PE_absptr)
+
+/* Emit a PC-relative relocation. */
+#define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL) \
+ do { \
+ fputs (integer_asm_op (SIZE, FALSE), FILE); \
+ assemble_name (FILE, LABEL); \
+ fputs ("@pcrel", FILE); \
+ } while (0)
+/* Xtensa constant pool breaks the devices in crtstuff.c to control
+ section in where code resides. We have to write it as asm code. Use
+ a MOVI and let the assembler relax it -- for the .init and .fini
+ sections, the assembler knows to put the literal in the right
+ place. */
+#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
+ asm (SECTION_OP "\n\
+ movi\ta8, " USER_LABEL_PREFIX #FUNC "\n\
+ callx8\ta8\n" \
+ TEXT_SECTION_ASM_OP);
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