/* Configuration for GCC-compiler for PA-RISC. Copyright (C) 1999-2024 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. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see . */ /* Standard register usage. It is safe to refer to actual register numbers in this file. */ /* 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 2.0w 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. Due to limitations within GCC itself, we do not expose the left/right half addressability when in wide mode. This is not a major performance issue as using the halves independently triggers false dependency stalls anyway. */ #define FIRST_PSEUDO_REGISTER 62 /* 32 general regs + 28 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 12-21 = Preserved Registers Freg 22-31 = 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, \ /* 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, \ 0, 0, 0, 0, 0, 0, 0, 0, \ 0, 0, 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. */ #define REG_ALLOC_ORDER \ { \ /* caller-saved fp regs. */ \ 50, 51, 52, 53, 54, 55, 56, 57, \ 58, 59, 39, 38, 37, 36, 35, 34, \ 33, 32, \ /* caller-saved general regs. */ \ 28, 31, 19, 20, 21, 22, 23, 24, \ 25, 26, 29, 2, \ /* callee-saved fp regs. */ \ 40, 41, 42, 43, 44, 45, 46, 47, \ 48, 49, \ /* callee-saved general regs. */ \ 3, 4, 5, 6, 7, 8, 9, 10, \ 11, 12, 13, 14, 15, 16, 17, 18, \ /* special registers. */ \ 1, 27, 30, 0, 60, 61} /* 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. For PA64, GPRs and FPRs hold 64 bits worth. We ignore the 32-bit addressability of the FPRs and pretend each register holds precisely WORD_SIZE bits. Note that SCmode values are placed in a single FPR. Thus, any patterns defined to operate on these values would have to use the 32-bit addressability of the FPR registers. */ #define PA_HARD_REGNO_NREGS(REGNO, MODE) \ ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) /* These are the valid FP modes. */ #define VALID_FP_MODE_P(MODE) \ ((MODE) == SFmode || (MODE) == DFmode \ || (MODE) == SCmode || (MODE) == DCmode \ || (MODE) == SImode || (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. We force this to be an even register if it cannot hold the full mode. */ #define PA_HARD_REGNO_MODE_OK(REGNO, MODE) \ ((REGNO) == 0 \ ? (MODE) == CCmode || (MODE) == CCFPmode \ : (REGNO) == 60 ? SCALAR_INT_MODE_P (MODE) \ /* Make wide modes be in aligned registers. */ \ : FP_REGNO_P (REGNO) \ ? (VALID_FP_MODE_P (MODE) \ && (GET_MODE_SIZE (MODE) <= 8 \ || (GET_MODE_SIZE (MODE) == 16 && ((REGNO) & 1) == 0) \ || (GET_MODE_SIZE (MODE) == 32 && ((REGNO) & 3) == 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))) /* How to renumber registers for gdb. Registers 0 - 31 remain unchanged. Registers 32 - 59 are mapped to 72, 74, 76 ... Register 60 is mapped to 32. */ #define DEBUGGER_REGNO(REGNO) \ ((REGNO) <= 31 ? (REGNO) : ((REGNO) < 60 ? (REGNO - 32) * 2 + 72 : 32)) /* We must not use the debugger 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}, /* NO_REGS */ \ {0x00000002, 0x00000000}, /* R1_REGS */ \ {0xfffffffe, 0x20000000}, /* GENERAL_REGS */ \ {0x00000000, 0x00000000}, /* FPUPPER_REGS */ \ {0x00000000, 0x0fffffff}, /* FP_REGS */ \ {0xfffffffe, 0x2fffffff}, /* GENERAL_OR_FP_REGS */ \ {0x00000000, 0x10000000}, /* SHIFT_REGS */ \ {0xfffffffe, 0x3fffffff}} /* ALL_REGS */ /* 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) == 61 ? GENERAL_REGS \ : (REGNO) < 60 ? FP_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) \ ((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) >= 19) && (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", "%fr5", "%fr6", "%fr7", "%fr8", "%fr9", "%fr10", "%fr11", \ "%fr12", "%fr13", "%fr14", "%fr15", "%fr16", "%fr17", "%fr18", "%fr19", \ "%fr20", "%fr21", "%fr22", "%fr23", "%fr24", "%fr25", "%fr26", "%fr27", \ "%fr28", "%fr29", "%fr30", "%fr31", "SAR", "sfp"} #define ADDITIONAL_REGISTER_NAMES \ {{"%cr11",60}} #define FP_SAVED_REG_LAST 49 #define FP_SAVED_REG_FIRST 40 #define FP_REG_STEP 1 #define FP_REG_FIRST 32 #define FP_REG_LAST 59