/* Definitions of target machine for GNU compiler for Intel X86
(386, 486, Pentium).
- Copyright (C) 1988, 92, 94-97, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1988, 92, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
This file is part of GNU CC.
%{mpentiumpro:-mcpu=pentiumpro}}"
#endif
\f
-#ifndef CPP_CPU_SPEC
-#ifdef __STDC__
+#define CPP_486_SPEC "%{!ansi:-Di486} -D__i486 -D__i486__"
+#define CPP_586_SPEC "%{!ansi:-Di586 -Dpentium} \
+ -D__i586 -D__i586__ -D__pentium -D__pentium__"
+#define CPP_686_SPEC "%{!ansi:-Di686 -Dpentiumpro} \
+ -D__i686 -D__i686__ -D__pentiumpro -D__pentiumpro__"
+
+#ifndef CPP_CPU_DEFAULT_SPEC
#if TARGET_CPU_DEFAULT == 1
-#define CPP_CPU_DEFAULT "-Di486"
+#define CPP_CPU_DEFAULT_SPEC "%(cpp_486)"
#else
#if TARGET_CPU_DEFAULT == 2
-#define CPP_CPU_DEFAULT "-Di586"
+#define CPP_CPU_DEFAULT_SPEC "%(cpp_586)"
#else
#if TARGET_CPU_DEFAULT == 3
-#define CPP_CPU_DEFAULT "-Di686"
+#define CPP_CPU_DEFAULT_SPEC "%(cpp_686)"
#else
-#define CPP_CPU_DEFAULT ""
+#define CPP_CPU_DEFAULT_SPEC ""
#endif
#endif
-#endif /* TARGET_CPU_DEFAULT */
-
-#define CPP_CPU_SPEC "\
--Di386 " CPP_CPU_DEFAULT " -Asystem(unix) -Acpu(i386) -Amachine(i386) \
-%{mcpu=i486:-Di486} %{m486:-Di486} \
-%{mpentium:-Dpentium -Di586} %{mcpu=pentium:-Dpentium -Di586} \
-%{mpentiumpro:-Dpentiumpro -Di686} %{mcpu=pentiumpro:-Dpentiumpro -Di686}"
+#endif
+#endif /* CPP_CPU_DEFAULT_SPEC */
-#else
+#ifndef CPP_CPU_SPEC
#define CPP_CPU_SPEC "\
--Di386 -Asystem(unix) -Acpu(i386) -Amachine(i386) \
-%{mcpu=i486:-Di486} %{m486:-Di486} \
-%{mpentium:-Dpentium -Di586} %{mcpu=pentium:-Dpentium -Di586} \
-%{mpentiumpro:-Dpentiumpro -Di686} %{mcpu=pentiumpro:-Dpentiumpro -Di686}"
-#endif /* __STDC__ */
-#endif /* CPP_CPU_SPEC */
+-Asystem(unix) -Acpu(i386) -Amachine(i386) \
+%{!ansi:-Di386} -D__i386 -D__i386__ \
+%{mcpu=i486:%(cpp_486)} %{m486:%(cpp_486)} \
+%{mpentium:%(cpp_586)} %{mcpu=pentium:%(cpp_586)} \
+%{mpentiumpro:%(cpp_686)} %{mcpu=pentiumpro:%(cpp_686)} \
+%{!mcpu*:%{!m486:%{!mpentium*:%(cpp_cpu_default)}}}"
+#endif
#ifndef CC1_SPEC
#define CC1_SPEC "%(cc1_spec) "
#endif
#define EXTRA_SPECS \
+ { "cpp_486", CPP_486_SPEC}, \
+ { "cpp_586", CPP_586_SPEC}, \
+ { "cpp_686", CPP_686_SPEC}, \
+ { "cpp_cpu_default", CPP_CPU_DEFAULT_SPEC }, \
{ "cpp_cpu", CPP_CPU_SPEC }, \
{ "cc1_cpu", CC1_CPU_SPEC }, \
SUBTARGET_EXTRA_SPECS
aligned on 64 bit boundaries. */
#define BIGGEST_ALIGNMENT (TARGET_ALIGN_DOUBLE ? 64 : 32)
-/* align DFmode constants and nonaggregates */
-#define ALIGN_DFmode (!TARGET_386)
+/* If defined, a C expression to compute the alignment given to a
+ constant that is being placed in memory. CONSTANT is the constant
+ and ALIGN is the alignment that the object would ordinarily have.
+ The value of this macro is used instead of that alignment to align
+ the object.
+
+ If this macro is not defined, then ALIGN is used.
+
+ The typical use of this macro is to increase alignment for string
+ constants to be word aligned so that `strcpy' calls that copy
+ constants can be done inline. */
+
+#define CONSTANT_ALIGNMENT(EXP, ALIGN) \
+ (TREE_CODE (EXP) == REAL_CST \
+ ? ((TYPE_MODE (TREE_TYPE (EXP)) == DFmode && (ALIGN) < 64) \
+ ? 64 \
+ : (TYPE_MODE (TREE_TYPE (EXP)) == XFmode && (ALIGN) < 128) \
+ ? 128 \
+ : (ALIGN)) \
+ : TREE_CODE (EXP) == STRING_CST \
+ ? ((TREE_STRING_LENGTH (EXP) >= 31 && (ALIGN) < 256) \
+ ? 256 \
+ : (ALIGN)) \
+ : (ALIGN))
+
+/* If defined, a C expression to compute the alignment for a static
+ variable. TYPE is the data type, and ALIGN is the alignment that
+ the object would ordinarily have. The value of this macro is used
+ instead of that alignment to align the object.
+
+ If this macro is not defined, then ALIGN is used.
+
+ One use of this macro is to increase alignment of medium-size
+ data to make it all fit in fewer cache lines. Another is to
+ cause character arrays to be word-aligned so that `strcpy' calls
+ that copy constants to character arrays can be done inline. */
+
+#define DATA_ALIGNMENT(TYPE, ALIGN) \
+ ((AGGREGATE_TYPE_P (TYPE) \
+ && TYPE_SIZE (TYPE) \
+ && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
+ && (TREE_INT_CST_LOW (TYPE_SIZE (TYPE)) >= 256 \
+ || TREE_INT_CST_HIGH (TYPE_SIZE (TYPE))) && (ALIGN) < 256) \
+ ? 256 \
+ : TREE_CODE (TYPE) == ARRAY_TYPE \
+ ? ((TYPE_MODE (TREE_TYPE (TYPE)) == DFmode && (ALIGN) < 64) \
+ ? 64 \
+ : (TYPE_MODE (TREE_TYPE (TYPE)) == XFmode && (ALIGN) < 128) \
+ ? 128 \
+ : (ALIGN)) \
+ : TREE_CODE (TYPE) == COMPLEX_TYPE \
+ ? ((TYPE_MODE (TYPE) == DCmode && (ALIGN) < 64) \
+ ? 64 \
+ : (TYPE_MODE (TYPE) == XCmode && (ALIGN) < 128) \
+ ? 128 \
+ : (ALIGN)) \
+ : ((TREE_CODE (TYPE) == RECORD_TYPE \
+ || TREE_CODE (TYPE) == UNION_TYPE \
+ || TREE_CODE (TYPE) == QUAL_UNION_TYPE) \
+ && TYPE_FIELDS (TYPE)) \
+ ? ((DECL_MODE (TYPE_FIELDS (TYPE)) == DFmode && (ALIGN) < 64) \
+ ? 64 \
+ : (DECL_MODE (TYPE_FIELDS (TYPE)) == XFmode && (ALIGN) < 128) \
+ ? 128 \
+ : (ALIGN)) \
+ : TREE_CODE (TYPE) == REAL_TYPE \
+ ? ((TYPE_MODE (TYPE) == DFmode && (ALIGN) < 64) \
+ ? 64 \
+ : (TYPE_MODE (TYPE) == XFmode && (ALIGN) < 128) \
+ ? 128 \
+ : (ALIGN)) \
+ : (ALIGN))
/* Set this non-zero if move instructions will actually fail to work
when given unaligned data. */
/* Required on the 386 since it doesn't have bitfield insns. */
#define PCC_BITFIELD_TYPE_MATTERS 1
-/* An integer expression for the size in bits of the largest integer
- machine mode that should actually be used. All integer machine modes of
- this size or smaller can be used for structures and unions with the
- appropriate sizes. */
-#define MAX_FIXED_MODE_SIZE 32
-
/* Maximum power of 2 that code can be aligned to. */
#define MAX_CODE_ALIGN 6 /* 64 byte alignment */
/* Align loop starts for optimal branching. */
#define LOOP_ALIGN(LABEL) (i386_align_loops)
+#define LOOP_ALIGN_MAX_SKIP (i386_align_loops_string ? 0 : 7)
/* This is how to align an instruction for optimal branching.
On i486 we'll get better performance by aligning on a
cache line (i.e. 16 byte) boundary. */
#define LABEL_ALIGN_AFTER_BARRIER(LABEL) (i386_align_jumps)
+#define LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP (i386_align_jumps_string ? 0 : 7)
\f
/* Standard register usage. */
for cross-compiler testing. */
#define HARD_REGNO_MODE_OK(REGNO, MODE) \
- ((REGNO) < 2 ? 1 \
- : (REGNO) < 4 ? 1 \
+ ((REGNO) < 4 ? 1 \
: FP_REGNO_P (REGNO) \
? (((int) GET_MODE_CLASS (MODE) == (int) MODE_FLOAT \
|| (int) GET_MODE_CLASS (MODE) == (int) MODE_COMPLEX_FLOAT) \
If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
for any hard reg, then this must be 0 for correct output. */
-#define MODES_TIEABLE_P(MODE1, MODE2) ((MODE1) == (MODE2))
+#define MODES_TIEABLE_P(MODE1, MODE2) \
+ ((MODE1) == (MODE2) \
+ || ((MODE1) == SImode && (MODE2) == HImode \
+ || (MODE1) == HImode && (MODE2) == SImode))
/* Specify the registers used for certain standard purposes.
The values of these macros are register numbers. */
of length N_REG_CLASSES. */
#define REG_CLASS_CONTENTS \
-{ 0, \
- 0x1, 0x2, 0x4, 0x8, /* AREG, DREG, CREG, BREG */ \
- 0x3, /* AD_REGS */ \
- 0xf, /* Q_REGS */ \
- 0x10, 0x20, /* SIREG, DIREG */ \
- 0x7f, /* INDEX_REGS */ \
- 0x100ff, /* GENERAL_REGS */ \
- 0x0100, 0x0200, /* FP_TOP_REG, FP_SECOND_REG */ \
- 0xff00, /* FLOAT_REGS */ \
- 0x1ffff }
+{ {0}, \
+ {0x1}, {0x2}, {0x4}, {0x8}, /* AREG, DREG, CREG, BREG */ \
+ {0x3}, /* AD_REGS */ \
+ {0xf}, /* Q_REGS */ \
+ {0x10}, {0x20}, /* SIREG, DIREG */ \
+ {0x7f}, /* INDEX_REGS */ \
+ {0x100ff}, /* GENERAL_REGS */ \
+ {0x0100}, {0x0200}, /* FP_TOP_REG, FP_SECOND_REG */ \
+ {0xff00}, /* FLOAT_REGS */ \
+ {0x1ffff}}
/* The same information, inverted:
Return the class number of the smallest class containing
#define CONST_COSTS(RTX,CODE,OUTER_CODE) \
case CONST_INT: \
+ return (unsigned) INTVAL (RTX) < 256 ? 0 : 1; \
case CONST: \
case LABEL_REF: \
case SYMBOL_REF: \
between two registers, you should define this macro to express the
relative cost. */
-/* #define MEMORY_MOVE_COST(M) 2 */
+/* #define MEMORY_MOVE_COST(M,C,I) 2 */
/* A C expression for the cost of a branch instruction. A value of 1
is the default; other values are interpreted relative to that. */
R -- print the prefix for register names.
z -- print the opcode suffix for the size of the current operand.
* -- print a star (in certain assembler syntax)
- w -- print the operand as if it's a "word" (HImode) even if it isn't.
- b -- print the operand as if it's a byte (QImode) even if it isn't.
- c -- don't print special prefixes before constant operands. */
+ P -- if PIC, print an @PLT suffix.
+ X -- don't print any sort of PIC '@' suffix for a symbol.
+ J -- print jump insn for arithmetic_comparison_operator.
+ s -- ??? something to do with double shifts. not actually used, afaik.
+ C -- print a conditional move suffix corresponding to the op code.
+ c -- likewise, but reverse the condition.
+ F,f -- likewise, but for floating-point. */
#define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
((CODE) == '*')
extern int is_fp_store ();
extern int agi_dependent ();
extern int reg_mentioned_in_mem ();
+extern char *output_int_conditional_move ();
+extern char *output_fp_conditional_move ();
+extern int ix86_can_use_return_insn_p ();
#ifdef NOTYET
extern struct rtx_def *copy_all_rtx ();
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