| /* Copyright (C) 2000-2015 Free Software Foundation, Inc. |
| |
| 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 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* Standard register usage. */ |
| |
| /* Number of actual hardware registers. |
| The hardware registers are assigned numbers for the compiler |
| from 0 to just below FIRST_PSEUDO_REGISTER. |
| All registers that the compiler knows about must be given numbers, |
| even those that are not normally considered general registers. |
| |
| HP-PA 1.0 has 32 fullword registers and 16 floating point |
| registers. The floating point registers hold either word or double |
| word values. |
| |
| 16 additional registers are reserved. |
| |
| HP-PA 1.1 has 32 fullword registers and 32 floating point |
| registers. However, the floating point registers behave |
| differently: the left and right halves of registers are addressable |
| as 32-bit registers. So, we will set things up like the 68k which |
| has different fp units: define separate register sets for the 1.0 |
| and 1.1 fp units. */ |
| |
| #define FIRST_PSEUDO_REGISTER 90 /* 32 general regs + 56 fp regs + |
| + 1 shift reg + frame pointer */ |
| |
| /* 1 for registers that have pervasive standard uses |
| and are not available for the register allocator. |
| |
| On the HP-PA, these are: |
| Reg 0 = 0 (hardware). However, 0 is used for condition code, |
| so is not fixed. |
| Reg 1 = ADDIL target/Temporary (hardware). |
| Reg 2 = Return Pointer |
| Reg 3 = Frame Pointer |
| Reg 4 = Frame Pointer (>8k varying frame with HP compilers only) |
| Reg 4-18 = Preserved Registers |
| Reg 19 = Linkage Table Register in HPUX 8.0 shared library scheme. |
| Reg 20-22 = Temporary Registers |
| Reg 23-26 = Temporary/Parameter Registers |
| Reg 27 = Global Data Pointer (hp) |
| Reg 28 = Temporary/Return Value register |
| Reg 29 = Temporary/Static Chain/Return Value register #2 |
| Reg 30 = stack pointer |
| Reg 31 = Temporary/Millicode Return Pointer (hp) |
| |
| Freg 0-3 = Status Registers -- Not known to the compiler. |
| Freg 4-7 = Arguments/Return Value |
| Freg 8-11 = Temporary Registers |
| Freg 12-15 = Preserved Registers |
| |
| Freg 16-31 = Reserved |
| |
| On the Snake, fp regs are |
| |
| Freg 0-3 = Status Registers -- Not known to the compiler. |
| Freg 4L-7R = Arguments/Return Value |
| Freg 8L-11R = Temporary Registers |
| Freg 12L-21R = Preserved Registers |
| Freg 22L-31R = Temporary Registers |
| |
| */ |
| |
| #define FIXED_REGISTERS \ |
| {0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 1, 0, 0, 1, 0, \ |
| /* fp registers */ \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| /* shift register and soft frame pointer */ \ |
| 0, 1} |
| |
| /* 1 for registers not available across function calls. |
| These must include the FIXED_REGISTERS and also any |
| registers that can be used without being saved. |
| The latter must include the registers where values are returned |
| and the register where structure-value addresses are passed. |
| Aside from that, you can include as many other registers as you like. */ |
| #define CALL_USED_REGISTERS \ |
| {1, 1, 1, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| /* fp registers */ \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 0, 0, 0, 0, \ |
| 0, 0, 0, 0, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| 1, 1, 1, 1, 1, 1, 1, 1, \ |
| /* shift register and soft frame pointer */ \ |
| 1, 1} |
| |
| /* Allocate the call used registers first. This should minimize |
| the number of registers that need to be saved (as call used |
| registers will generally not be allocated across a call). |
| |
| Experimentation has shown slightly better results by allocating |
| FP registers first. We allocate the caller-saved registers more |
| or less in reverse order to their allocation as arguments. |
| |
| FP registers are ordered so that all L registers are selected before |
| R registers. This works around a false dependency interlock on the |
| PA8000 when accessing the high and low parts of an FP register |
| independently. */ |
| |
| #define REG_ALLOC_ORDER \ |
| { \ |
| /* caller-saved fp regs. */ \ |
| 68, 70, 72, 74, 76, 78, 80, 82, \ |
| 84, 86, 40, 42, 44, 46, 38, 36, \ |
| 34, 32, \ |
| 69, 71, 73, 75, 77, 79, 81, 83, \ |
| 85, 87, 41, 43, 45, 47, 39, 37, \ |
| 35, 33, \ |
| /* caller-saved general regs. */ \ |
| 28, 19, 20, 21, 22, 31, 27, 29, \ |
| 23, 24, 25, 26, 2, \ |
| /* callee-saved fp regs. */ \ |
| 48, 50, 52, 54, 56, 58, 60, 62, \ |
| 64, 66, \ |
| 49, 51, 53, 55, 57, 59, 61, 63, \ |
| 65, 67, \ |
| /* callee-saved general regs. */ \ |
| 3, 4, 5, 6, 7, 8, 9, 10, \ |
| 11, 12, 13, 14, 15, 16, 17, 18, \ |
| /* special registers. */ \ |
| 1, 30, 0, 88, 89} |
| |
| |
| /* Return number of consecutive hard regs needed starting at reg REGNO |
| to hold something of mode MODE. |
| This is ordinarily the length in words of a value of mode MODE |
| but can be less for certain modes in special long registers. |
| |
| On the HP-PA, general registers are 32 bits wide. The floating |
| point registers are 64 bits wide. Snake fp regs are treated as |
| 32 bits wide since the left and right parts are independently |
| accessible. */ |
| #define HARD_REGNO_NREGS(REGNO, MODE) \ |
| (FP_REGNO_P (REGNO) \ |
| ? (!TARGET_PA_11 \ |
| ? COMPLEX_MODE_P (MODE) ? 2 : 1 \ |
| : (GET_MODE_SIZE (MODE) + 4 - 1) / 4) \ |
| : (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) |
| |
| /* There are no instructions that use DImode in PA 1.0, so we only |
| allow it in PA 1.1 and later. */ |
| #define VALID_FP_MODE_P(MODE) \ |
| ((MODE) == SFmode || (MODE) == DFmode \ |
| || (MODE) == SCmode || (MODE) == DCmode \ |
| || (MODE) == SImode || (TARGET_PA_11 && (MODE) == DImode)) |
| |
| /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. |
| |
| On the HP-PA, the cpu registers can hold any mode that fits in 32 bits. |
| For the 64-bit modes, we choose a set of non-overlapping general registers |
| that includes the incoming arguments and the return value. We specify a |
| set with no overlaps so that we don't have to specify that the destination |
| register is an early clobber in patterns using this mode. Except for the |
| return value, the starting registers are odd. For 128 and 256 bit modes, |
| we similarly specify non-overlapping sets of cpu registers. However, |
| there aren't any patterns defined for modes larger than 64 bits at the |
| moment. |
| |
| We limit the modes allowed in the floating point registers to the |
| set of modes used in the machine definition. In addition, we allow |
| the complex modes SCmode and DCmode. The real and imaginary parts |
| of complex modes are allocated to separate registers. This might |
| allow patterns to be defined in the future to operate on these values. |
| |
| The PA 2.0 architecture specifies that quad-precision floating-point |
| values should start on an even floating point register. Thus, we |
| choose non-overlapping sets of registers starting on even register |
| boundaries for large modes. However, there is currently no support |
| in the machine definition for modes larger than 64 bits. TFmode is |
| supported under HP-UX using libcalls. Since TFmode values are passed |
| by reference, they never need to be loaded into the floating-point |
| registers. */ |
| #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
| ((REGNO) == 0 ? (MODE) == CCmode || (MODE) == CCFPmode \ |
| : (REGNO) == 88 ? SCALAR_INT_MODE_P (MODE) \ |
| : !TARGET_PA_11 && FP_REGNO_P (REGNO) \ |
| ? (VALID_FP_MODE_P (MODE) \ |
| && (GET_MODE_SIZE (MODE) <= 8 \ |
| || (GET_MODE_SIZE (MODE) == 16 && ((REGNO) & 3) == 0))) \ |
| : FP_REGNO_P (REGNO) \ |
| ? (VALID_FP_MODE_P (MODE) \ |
| && (GET_MODE_SIZE (MODE) <= 4 \ |
| || (GET_MODE_SIZE (MODE) == 8 && ((REGNO) & 1) == 0) \ |
| || (GET_MODE_SIZE (MODE) == 16 && ((REGNO) & 3) == 0) \ |
| || (GET_MODE_SIZE (MODE) == 32 && ((REGNO) & 7) == 0))) \ |
| : (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD \ |
| || (GET_MODE_SIZE (MODE) == 2 * UNITS_PER_WORD \ |
| && ((((REGNO) & 1) == 1 && (REGNO) <= 25) || (REGNO) == 28)) \ |
| || (GET_MODE_SIZE (MODE) == 4 * UNITS_PER_WORD \ |
| && ((REGNO) & 3) == 3 && (REGNO) <= 23) \ |
| || (GET_MODE_SIZE (MODE) == 8 * UNITS_PER_WORD \ |
| && ((REGNO) & 7) == 3 && (REGNO) <= 19))) |
| |
| /* How to renumber registers for dbx and gdb. |
| |
| Registers 0 - 31 remain unchanged. |
| |
| Registers 32 - 87 are mapped to 72 - 127 |
| |
| Register 88 is mapped to 32. */ |
| |
| #define DBX_REGISTER_NUMBER(REGNO) \ |
| ((REGNO) <= 31 ? (REGNO) : \ |
| ((REGNO) <= 87 ? (REGNO) + 40 : 32)) |
| |
| /* We must not use the DBX register numbers for the DWARF 2 CFA column |
| numbers because that maps to numbers beyond FIRST_PSEUDO_REGISTER. |
| Instead use the identity mapping. */ |
| #define DWARF_FRAME_REGNUM(REG) REG |
| |
| /* Define the classes of registers for register constraints in the |
| machine description. Also define ranges of constants. |
| |
| One of the classes must always be named ALL_REGS and include all hard regs. |
| If there is more than one class, another class must be named NO_REGS |
| and contain no registers. |
| |
| The name GENERAL_REGS must be the name of a class (or an alias for |
| another name such as ALL_REGS). This is the class of registers |
| that is allowed by "g" or "r" in a register constraint. |
| Also, registers outside this class are allocated only when |
| instructions express preferences for them. |
| |
| The classes must be numbered in nondecreasing order; that is, |
| a larger-numbered class must never be contained completely |
| in a smaller-numbered class. |
| |
| For any two classes, it is very desirable that there be another |
| class that represents their union. */ |
| |
| /* The HP-PA has four kinds of registers: general regs, 1.0 fp regs, |
| 1.1 fp regs, and the high 1.1 fp regs, to which the operands of |
| fmpyadd and fmpysub are restricted. */ |
| |
| enum reg_class { NO_REGS, R1_REGS, GENERAL_REGS, FPUPPER_REGS, FP_REGS, |
| GENERAL_OR_FP_REGS, SHIFT_REGS, ALL_REGS, LIM_REG_CLASSES}; |
| |
| #define N_REG_CLASSES (int) LIM_REG_CLASSES |
| |
| /* Give names of register classes as strings for dump file. */ |
| |
| #define REG_CLASS_NAMES \ |
| {"NO_REGS", "R1_REGS", "GENERAL_REGS", "FPUPPER_REGS", "FP_REGS", \ |
| "GENERAL_OR_FP_REGS", "SHIFT_REGS", "ALL_REGS"} |
| |
| /* Define which registers fit in which classes. |
| This is an initializer for a vector of HARD_REG_SET |
| of length N_REG_CLASSES. Register 0, the "condition code" register, |
| is in no class. */ |
| |
| #define REG_CLASS_CONTENTS \ |
| {{0x00000000, 0x00000000, 0x00000000}, /* NO_REGS */ \ |
| {0x00000002, 0x00000000, 0x00000000}, /* R1_REGS */ \ |
| {0xfffffffe, 0x00000000, 0x02000000}, /* GENERAL_REGS */ \ |
| {0x00000000, 0xff000000, 0x00ffffff}, /* FPUPPER_REGS */ \ |
| {0x00000000, 0xffffffff, 0x00ffffff}, /* FP_REGS */ \ |
| {0xfffffffe, 0xffffffff, 0x02ffffff}, /* GENERAL_OR_FP_REGS */ \ |
| {0x00000000, 0x00000000, 0x01000000}, /* SHIFT_REGS */ \ |
| {0xfffffffe, 0xffffffff, 0x03ffffff}} /* ALL_REGS */ |
| |
| /* Defines invalid mode changes. */ |
| |
| #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \ |
| pa_cannot_change_mode_class (FROM, TO, CLASS) |
| |
| /* Return the class number of the smallest class containing |
| reg number REGNO. This could be a conditional expression |
| or could index an array. */ |
| |
| #define REGNO_REG_CLASS(REGNO) \ |
| ((REGNO) == 0 ? NO_REGS \ |
| : (REGNO) == 1 ? R1_REGS \ |
| : (REGNO) < 32 || (REGNO) == 89 ? GENERAL_REGS \ |
| : (REGNO) < 56 ? FP_REGS \ |
| : (REGNO) < 88 ? FPUPPER_REGS \ |
| : SHIFT_REGS) |
| |
| /* Return the maximum number of consecutive registers |
| needed to represent mode MODE in a register of class CLASS. */ |
| #define CLASS_MAX_NREGS(CLASS, MODE) \ |
| ((CLASS) == FP_REGS || (CLASS) == FPUPPER_REGS \ |
| ? (!TARGET_PA_11 \ |
| ? COMPLEX_MODE_P (MODE) ? 2 : 1 \ |
| : (GET_MODE_SIZE (MODE) + 4 - 1) / 4) \ |
| : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) |
| |
| /* 1 if N is a possible register number for function argument passing. */ |
| |
| #define FUNCTION_ARG_REGNO_P(N) \ |
| (((N) >= 23 && (N) <= 26) || (! TARGET_SOFT_FLOAT && (N) >= 32 && (N) <= 39)) |
| |
| /* How to refer to registers in assembler output. |
| This sequence is indexed by compiler's hard-register-number (see above). */ |
| |
| #define REGISTER_NAMES \ |
| {"%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7", \ |
| "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", \ |
| "%r16", "%r17", "%r18", "%r19", "%r20", "%r21", "%r22", "%r23", \ |
| "%r24", "%r25", "%r26", "%r27", "%r28", "%r29", "%r30", "%r31", \ |
| "%fr4", "%fr4R", "%fr5", "%fr5R", "%fr6", "%fr6R", "%fr7", "%fr7R", \ |
| "%fr8", "%fr8R", "%fr9", "%fr9R", "%fr10", "%fr10R", "%fr11", "%fr11R", \ |
| "%fr12", "%fr12R", "%fr13", "%fr13R", "%fr14", "%fr14R", "%fr15", "%fr15R", \ |
| "%fr16", "%fr16R", "%fr17", "%fr17R", "%fr18", "%fr18R", "%fr19", "%fr19R", \ |
| "%fr20", "%fr20R", "%fr21", "%fr21R", "%fr22", "%fr22R", "%fr23", "%fr23R", \ |
| "%fr24", "%fr24R", "%fr25", "%fr25R", "%fr26", "%fr26R", "%fr27", "%fr27R", \ |
| "%fr28", "%fr28R", "%fr29", "%fr29R", "%fr30", "%fr30R", "%fr31", "%fr31R", \ |
| "SAR", "sfp"} |
| |
| #define ADDITIONAL_REGISTER_NAMES \ |
| {{"%fr4L",32}, {"%fr5L",34}, {"%fr6L",36}, {"%fr7L",38}, \ |
| {"%fr8L",40}, {"%fr9L",42}, {"%fr10L",44}, {"%fr11L",46}, \ |
| {"%fr12L",48}, {"%fr13L",50}, {"%fr14L",52}, {"%fr15L",54}, \ |
| {"%fr16L",56}, {"%fr17L",58}, {"%fr18L",60}, {"%fr19L",62}, \ |
| {"%fr20L",64}, {"%fr21L",66}, {"%fr22L",68}, {"%fr23L",70}, \ |
| {"%fr24L",72}, {"%fr25L",74}, {"%fr26L",76}, {"%fr27L",78}, \ |
| {"%fr28L",80}, {"%fr29L",82}, {"%fr30L",84}, {"%fr31R",86}, \ |
| {"%cr11",88}} |
| |
| #define FP_SAVED_REG_LAST 66 |
| #define FP_SAVED_REG_FIRST 48 |
| #define FP_REG_STEP 2 |
| #define FP_REG_FIRST 32 |
| #define FP_REG_LAST 87 |