diff options
Diffstat (limited to 'gcc-4.4.3/gcc/config/arm/arm.h')
| -rw-r--r-- | gcc-4.4.3/gcc/config/arm/arm.h | 99 |
1 files changed, 67 insertions, 32 deletions
diff --git a/gcc-4.4.3/gcc/config/arm/arm.h b/gcc-4.4.3/gcc/config/arm/arm.h index a413dd323..1189914f6 100644 --- a/gcc-4.4.3/gcc/config/arm/arm.h +++ b/gcc-4.4.3/gcc/config/arm/arm.h @@ -880,6 +880,9 @@ extern int arm_structure_size_boundary; /* The number of (integer) argument register available. */ #define NUM_ARG_REGS 4 +/* And similarly for the VFP. */ +#define NUM_VFP_ARG_REGS 16 + /* Return the register number of the N'th (integer) argument. */ #define ARG_REGISTER(N) (N - 1) @@ -1494,9 +1497,10 @@ do { \ /* Define how to find the value returned by a library function assuming the value has mode MODE. */ -#define LIBCALL_VALUE(MODE) \ - (TARGET_32BIT && TARGET_HARD_FLOAT_ABI && TARGET_FPA \ - && GET_MODE_CLASS (MODE) == MODE_FLOAT \ +#define LIBCALL_VALUE(MODE) \ + (TARGET_AAPCS_BASED ? aapcs_libcall_value (MODE) \ + : (TARGET_32BIT && TARGET_HARD_FLOAT_ABI && TARGET_FPA \ + && GET_MODE_CLASS (MODE) == MODE_FLOAT) \ ? gen_rtx_REG (MODE, FIRST_FPA_REGNUM) \ : TARGET_32BIT && TARGET_HARD_FLOAT_ABI && TARGET_MAVERICK \ && GET_MODE_CLASS (MODE) == MODE_FLOAT \ @@ -1505,22 +1509,16 @@ do { \ ? gen_rtx_REG (MODE, FIRST_IWMMXT_REGNUM) \ : gen_rtx_REG (MODE, ARG_REGISTER (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 FUNCTION_VALUE(VALTYPE, FUNC) \ - arm_function_value (VALTYPE, FUNC); - -/* 1 if N is a possible register number for a function value. - On the ARM, only r0 and f0 can return results. */ -/* On a Cirrus chip, mvf0 can return results. */ -#define FUNCTION_VALUE_REGNO_P(REGNO) \ - ((REGNO) == ARG_REGISTER (1) \ - || (TARGET_32BIT && ((REGNO) == FIRST_CIRRUS_FP_REGNUM) \ - && TARGET_HARD_FLOAT_ABI && TARGET_MAVERICK) \ - || ((REGNO) == FIRST_IWMMXT_REGNUM && TARGET_IWMMXT_ABI) \ - || (TARGET_32BIT && ((REGNO) == FIRST_FPA_REGNUM) \ +/* 1 if REGNO is a possible register number for a function value. */ +#define FUNCTION_VALUE_REGNO_P(REGNO) \ + ((REGNO) == ARG_REGISTER (1) \ + || (TARGET_AAPCS_BASED && TARGET_32BIT \ + && TARGET_VFP && TARGET_HARD_FLOAT \ + && (REGNO) == FIRST_VFP_REGNUM) \ + || (TARGET_32BIT && ((REGNO) == FIRST_CIRRUS_FP_REGNUM) \ + && TARGET_HARD_FLOAT_ABI && TARGET_MAVERICK) \ + || ((REGNO) == FIRST_IWMMXT_REGNUM && TARGET_IWMMXT_ABI) \ + || (TARGET_32BIT && ((REGNO) == FIRST_FPA_REGNUM) \ && TARGET_HARD_FLOAT_ABI && TARGET_FPA)) /* Amount of memory needed for an untyped call to save all possible return @@ -1620,9 +1618,27 @@ machine_function; that is in text_section. */ extern GTY(()) rtx thumb_call_via_label[14]; +/* The number of potential ways of assigning to a co-processor. */ +#define ARM_NUM_COPROC_SLOTS 1 + +/* Enumeration of procedure calling standard variants. We don't really + support all of these yet. */ +enum arm_pcs +{ + ARM_PCS_AAPCS, /* Base standard AAPCS. */ + ARM_PCS_AAPCS_VFP, /* Use VFP registers for floating point values. */ + ARM_PCS_AAPCS_IWMMXT, /* Use iWMMXT registers for vectors. */ + /* This must be the last AAPCS variant. */ + ARM_PCS_AAPCS_LOCAL, /* Private call within this compilation unit. */ + ARM_PCS_ATPCS, /* ATPCS. */ + ARM_PCS_APCS, /* APCS (legacy Linux etc). */ + ARM_PCS_UNKNOWN +}; + +/* We can't define this inside a generator file because it needs enum + machine_mode. */ /* A C type for declaring a variable that is used as the first argument of - `FUNCTION_ARG' and other related values. For some target machines, the - type `int' suffices and can hold the number of bytes of argument so far. */ + `FUNCTION_ARG' and other related values. */ typedef struct { /* This is the number of registers of arguments scanned so far. */ @@ -1631,7 +1647,30 @@ typedef struct int iwmmxt_nregs; int named_count; int nargs; - int can_split; + /* Which procedure call variant to use for this call. */ + enum arm_pcs pcs_variant; + + /* AAPCS related state tracking. */ + int aapcs_arg_processed; /* No need to lay out this argument again. */ + int aapcs_cprc_slot; /* Index of co-processor rules to handle + this argument, or -1 if using core + registers. */ + int aapcs_ncrn; + int aapcs_next_ncrn; + rtx aapcs_reg; /* Register assigned to this argument. */ + int aapcs_partial; /* How many bytes are passed in regs (if + split between core regs and stack. + Zero otherwise. */ + int aapcs_cprc_failed[ARM_NUM_COPROC_SLOTS]; + int can_split; /* Argument can be split between core regs + and the stack. */ + /* Private data for tracking VFP register allocation */ + unsigned aapcs_vfp_regs_free; + unsigned aapcs_vfp_reg_alloc; + int aapcs_vfp_rcount; + /* Can't include insn-modes.h because this header is needed before we + generate it. */ + int /* enum machine_mode */ aapcs_vfp_rmode; } CUMULATIVE_ARGS; /* Define where to put the arguments to a function. @@ -1677,13 +1716,7 @@ typedef struct 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) \ - (CUM).nargs += 1; \ - if (arm_vector_mode_supported_p (MODE) \ - && (CUM).named_count > (CUM).nargs \ - && TARGET_IWMMXT_ABI) \ - (CUM).iwmmxt_nregs += 1; \ - else \ - (CUM).nregs += ARM_NUM_REGS2 (MODE, TYPE) + arm_function_arg_advance (&(CUM), (MODE), (TYPE), (NAMED)) /* If defined, a C expression that gives the alignment boundary, in bits, of an argument with the specified mode and type. If it is not defined, @@ -1695,9 +1728,11 @@ typedef struct /* 1 if N is a possible register number for function argument passing. On the ARM, r0-r3 are used to pass args. */ -#define FUNCTION_ARG_REGNO_P(REGNO) \ - (IN_RANGE ((REGNO), 0, 3) \ - || (TARGET_IWMMXT_ABI \ +#define FUNCTION_ARG_REGNO_P(REGNO) \ + (IN_RANGE ((REGNO), 0, 3) \ + || (TARGET_AAPCS_BASED && TARGET_VFP && TARGET_HARD_FLOAT \ + && IN_RANGE ((REGNO), FIRST_VFP_REGNUM, FIRST_VFP_REGNUM + 15)) \ + || (TARGET_IWMMXT_ABI \ && IN_RANGE ((REGNO), FIRST_IWMMXT_REGNUM, FIRST_IWMMXT_REGNUM + 9))) |