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- /* Output routines for GCC for Hitachi Super-H.
- Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC 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 version.
-
- GNU CC 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 GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
- /* Contributed by Steve Chamberlain (sac@cygnus.com).
- Improved by Jim Wilson (wilson@cygnus.com). */
-
- #include "config.h"
-
- #include <stdio.h>
-
- #include "rtl.h"
- #include "tree.h"
- #include "flags.h"
- #include "insn-flags.h"
- #include "expr.h"
- #include "regs.h"
- #include "hard-reg-set.h"
- #include "output.h"
-
- #define MSW (TARGET_LITTLE_ENDIAN ? 1 : 0)
- #define LSW (TARGET_LITTLE_ENDIAN ? 0 : 1)
-
- /* ??? The pragma interrupt support will not work for SH3. */
- /* This is set by #pragma interrupt and #pragma trapa, and causes gcc to
- output code for the next function appropriate for an interrupt handler. */
- int pragma_interrupt;
-
- /* This is set by #pragma trapa, and is similar to the above, except that
- the compiler doesn't emit code to preserve all registers. */
- static int pragma_trapa;
-
- /* This is used for communication between SETUP_INCOMING_VARARGS and
- sh_expand_prologue. */
- int current_function_anonymous_args;
-
- /* Global variables from toplev.c and final.c that are used within, but
- not declared in any header file. */
- extern char *version_string;
- extern int *insn_addresses;
-
- /* Global variables for machine-dependent things. */
-
- /* Which cpu are we scheduling for. */
- enum processor_type sh_cpu;
-
- /* Saved operands from the last compare to use when we generate an scc
- or bcc insn. */
-
- rtx sh_compare_op0;
- rtx sh_compare_op1;
-
- /* Provides the class number of the smallest class containing
- reg number. */
-
- int regno_reg_class[FIRST_PSEUDO_REGISTER] =
- {
- R0_REGS, GENERAL_REGS, GENERAL_REGS, GENERAL_REGS,
- GENERAL_REGS, GENERAL_REGS, GENERAL_REGS, GENERAL_REGS,
- GENERAL_REGS, GENERAL_REGS, GENERAL_REGS, GENERAL_REGS,
- GENERAL_REGS, GENERAL_REGS, GENERAL_REGS, GENERAL_REGS,
- GENERAL_REGS, PR_REGS, T_REGS, NO_REGS,
- MAC_REGS, MAC_REGS,
- };
-
- /* Provide reg_class from a letter such as appears in the machine
- description. */
-
- enum reg_class reg_class_from_letter[] =
- {
- /* a */ NO_REGS, /* b */ NO_REGS, /* c */ NO_REGS, /* d */ NO_REGS,
- /* e */ NO_REGS, /* f */ NO_REGS, /* g */ NO_REGS, /* h */ NO_REGS,
- /* i */ NO_REGS, /* j */ NO_REGS, /* k */ NO_REGS, /* l */ PR_REGS,
- /* m */ NO_REGS, /* n */ NO_REGS, /* o */ NO_REGS, /* p */ NO_REGS,
- /* q */ NO_REGS, /* r */ NO_REGS, /* s */ NO_REGS, /* t */ T_REGS,
- /* u */ NO_REGS, /* v */ NO_REGS, /* w */ NO_REGS, /* x */ MAC_REGS,
- /* y */ NO_REGS, /* z */ R0_REGS
- };
-
- /* Print the operand address in x to the stream. */
-
- void
- print_operand_address (stream, x)
- FILE *stream;
- rtx x;
- {
- switch (GET_CODE (x))
- {
- case REG:
- fprintf (stream, "@%s", reg_names[REGNO (x)]);
- break;
-
- case PLUS:
- {
- rtx base = XEXP (x, 0);
- rtx index = XEXP (x, 1);
-
- switch (GET_CODE (index))
- {
- case CONST_INT:
- fprintf (stream, "@(%d,%s)", INTVAL (index),
- reg_names[REGNO (base)]);
- break;
-
- case REG:
- fprintf (stream, "@(r0,%s)",
- reg_names[MAX (REGNO (base), REGNO (index))]);
- break;
-
- default:
- debug_rtx (x);
- abort ();
- }
- }
- break;
-
- case PRE_DEC:
- fprintf (stream, "@-%s", reg_names[REGNO (XEXP (x, 0))]);
- break;
-
- case POST_INC:
- fprintf (stream, "@%s+", reg_names[REGNO (XEXP (x, 0))]);
- break;
-
- default:
- output_addr_const (stream, x);
- break;
- }
- }
-
- /* Print operand x (an rtx) in assembler syntax to file stream
- according to modifier code.
-
- '.' print a .s if insn needs delay slot
- '@' print rte or rts depending upon pragma interruptness
- '#' output a nop if there is nothing to put in the delay slot
- 'O' print a constant without the #
- 'R' print the LSW of a dp value - changes if in little endian
- 'S' print the MSW of a dp value - changes if in little endian
- 'T' print the next word of a dp value - same as 'R' in big endian mode. */
-
- void
- print_operand (stream, x, code)
- FILE *stream;
- rtx x;
- int code;
- {
- switch (code)
- {
- case '.':
- if (final_sequence
- && ! INSN_ANNULLED_BRANCH_P (XVECEXP (final_sequence, 0, 0)))
- fprintf (stream, ".s");
- break;
- case '@':
- if (pragma_interrupt)
- fprintf (stream, "rte");
- else
- fprintf (stream, "rts");
- break;
- case '#':
- /* Output a nop if there's nothing in the delay slot. */
- if (dbr_sequence_length () == 0)
- fprintf (stream, "\n\tnop");
- break;
- case 'O':
- output_addr_const (stream, x);
- break;
- case 'R':
- fputs (reg_names[REGNO (x) + LSW], (stream));
- break;
- case 'S':
- fputs (reg_names[REGNO (x) + MSW], (stream));
- break;
- case 'T':
- /* Next word of a double. */
- switch (GET_CODE (x))
- {
- case REG:
- fputs (reg_names[REGNO (x) + 1], (stream));
- break;
- case MEM:
- print_operand_address (stream,
- XEXP (adj_offsettable_operand (x, 4), 0));
- break;
- }
- break;
- default:
- switch (GET_CODE (x))
- {
- case REG:
- fputs (reg_names[REGNO (x)], (stream));
- break;
- case MEM:
- output_address (XEXP (x, 0));
- break;
- default:
- fputc ('#', stream);
- output_addr_const (stream, x);
- break;
- }
- break;
- }
- }
-
- /* Emit code to perform a block move. Choose the best method.
-
- OPERANDS[0] is the destination.
- OPERANDS[1] is the source.
- OPERANDS[2] is the size.
- OPERANDS[3] is the alignment safe to use. */
-
- int
- expand_block_move (operands)
- rtx *operands;
- {
- int align = INTVAL (operands[3]);
- int constp = (GET_CODE (operands[2]) == CONST_INT);
- int bytes = (constp ? INTVAL (operands[2]) : 0);
-
- /* If it isn't a constant number of bytes, or if it doesn't have 4 byte
- alignment, or if it isn't a multiple of 4 bytes, then fail. */
- if (! constp || align < 4 || (bytes % 4 != 0))
- return 0;
-
- if (bytes < 64)
- {
- char entry[30];
- tree entry_name;
- rtx func_addr_rtx;
- rtx r4 = gen_rtx (REG, SImode, 4);
- rtx r5 = gen_rtx (REG, SImode, 5);
-
- sprintf (entry, "__movstrSI%d", bytes);
- entry_name = get_identifier (entry);
-
- func_addr_rtx
- = copy_to_mode_reg (Pmode,
- gen_rtx (SYMBOL_REF, Pmode,
- IDENTIFIER_POINTER (entry_name)));
- emit_insn (gen_move_insn (r4, XEXP (operands[0], 0)));
- emit_insn (gen_move_insn (r5, XEXP (operands[1], 0)));
- emit_insn (gen_block_move_real (func_addr_rtx));
- return 1;
- }
-
- /* This is the same number of bytes as a memcpy call, but to a different
- less common function name, so this will occasionally use more space. */
- if (! TARGET_SMALLCODE)
- {
- tree entry_name;
- rtx func_addr_rtx;
- int final_switch, while_loop;
- rtx r4 = gen_rtx (REG, SImode, 4);
- rtx r5 = gen_rtx (REG, SImode, 5);
- rtx r6 = gen_rtx (REG, SImode, 6);
-
- entry_name = get_identifier ("__movstr");
- func_addr_rtx
- = copy_to_mode_reg (Pmode,
- gen_rtx (SYMBOL_REF, Pmode,
- IDENTIFIER_POINTER (entry_name)));
- emit_insn (gen_move_insn (r4, XEXP (operands[0], 0)));
- emit_insn (gen_move_insn (r5, XEXP (operands[1], 0)));
-
- /* r6 controls the size of the move. 16 is decremented from it
- for each 64 bytes moved. Then the negative bit left over is used
- as an index into a list of move instructions. e.g., a 72 byte move
- would be set up with size(r6) = 14, for one iteration through the
- big while loop, and a switch of -2 for the last part. */
-
- final_switch = 16 - ((bytes / 4) % 16);
- while_loop = ((bytes / 4) / 16 - 1) * 16;
- emit_insn (gen_move_insn (r6, GEN_INT (while_loop + final_switch)));
- emit_insn (gen_block_lump_real (func_addr_rtx));
- return 1;
- }
-
- return 0;
- }
-
- /* Prepare operands for a move define_expand; specifically, one of the
- operands must be in a register. */
-
- int
- prepare_move_operands (operands, mode)
- rtx operands[];
- enum machine_mode mode;
- {
- /* Copy the source to a register if both operands aren't registers. */
- if (! reload_in_progress && ! reload_completed
- && ! register_operand (operands[0], mode)
- && ! register_operand (operands[1], mode))
- operands[1] = copy_to_mode_reg (mode, operands[1]);
-
- return 0;
- }
-
- /* Prepare the operands for an scc instruction; make sure that the
- compare has been done. */
- rtx
- prepare_scc_operands (code)
- enum rtx_code code;
- {
- rtx t_reg = gen_rtx (REG, SImode, T_REG);
- enum rtx_code oldcode = code;
-
- /* First need a compare insn. */
- switch (code)
- {
- case NE:
- /* It isn't possible to handle this case. */
- abort ();
- case LT:
- code = GT;
- break;
- case LE:
- code = GE;
- break;
- case LTU:
- code = GTU;
- break;
- case LEU:
- code = GEU;
- break;
- }
- if (code != oldcode)
- {
- rtx tmp = sh_compare_op0;
- sh_compare_op0 = sh_compare_op1;
- sh_compare_op1 = tmp;
- }
-
- sh_compare_op0 = force_reg (SImode, sh_compare_op0);
- if (code != EQ && code != NE
- && (sh_compare_op1 != const0_rtx
- || code == GTU || code == GEU || code == LTU || code == LEU))
- sh_compare_op1 = force_reg (SImode, sh_compare_op1);
-
- emit_insn (gen_rtx (SET, VOIDmode, t_reg,
- gen_rtx (code, SImode, sh_compare_op0,
- sh_compare_op1)));
-
- return t_reg;
- }
-
- /* Called from the md file, set up the operands of a compare instruction. */
-
- void
- from_compare (operands, code)
- rtx *operands;
- int code;
- {
- if (code != EQ && code != NE)
- {
- /* Force args into regs, since we can't use constants here. */
- sh_compare_op0 = force_reg (SImode, sh_compare_op0);
- if (sh_compare_op1 != const0_rtx
- || code == GTU || code == GEU || code == LTU || code == LEU)
- sh_compare_op1 = force_reg (SImode, sh_compare_op1);
- }
- operands[1] = sh_compare_op0;
- operands[2] = sh_compare_op1;
- }
-
- /* Functions to output assembly code. */
-
- /* Return a sequence of instructions to perform DI or DF move.
-
- Since the SH cannot move a DI or DF in one instruction, we have
- to take care when we see overlapping source and dest registers. */
-
- char *
- output_movedouble (insn, operands, mode)
- rtx insn;
- rtx operands[];
- enum machine_mode mode;
- {
- rtx dst = operands[0];
- rtx src = operands[1];
-
- if (GET_CODE (dst) == MEM
- && GET_CODE (XEXP (dst, 0)) == PRE_DEC)
- return "mov.l %T1,%0\n\tmov.l %1,%0";
-
- if (register_operand (dst, mode)
- && register_operand (src, mode))
- {
- if (REGNO (src) == MACH_REG)
- return "sts mach,%S0\n\tsts macl,%R0";
-
- /* When mov.d r1,r2 do r2->r3 then r1->r2;
- when mov.d r1,r0 do r1->r0 then r2->r1. */
-
- if (REGNO (src) + 1 == REGNO (dst))
- return "mov %T1,%T0\n\tmov %1,%0";
- else
- return "mov %1,%0\n\tmov %T1,%T0";
- }
- else if (GET_CODE (src) == CONST_INT)
- {
- if (INTVAL (src) < 0)
- output_asm_insn ("mov #-1,%S0", operands);
- else
- output_asm_insn ("mov #0,%S0", operands);
-
- return "mov %1,%R0";
- }
- else if (GET_CODE (src) == MEM)
- {
- int ptrreg = -1;
- int dreg = REGNO (dst);
- rtx inside = XEXP (src, 0);
-
- if (GET_CODE (inside) == REG)
- ptrreg = REGNO (inside);
- else if (GET_CODE (inside) == SUBREG)
- ptrreg = REGNO (SUBREG_REG (inside)) + SUBREG_WORD (inside);
- else if (GET_CODE (inside) == PLUS)
- {
- ptrreg = REGNO (XEXP (inside, 0));
- /* ??? A r0+REG address shouldn't be possible here, because it isn't
- an offsettable address. Unfortunately, offsettable addresses use
- QImode to check the offset, and a QImode offsettable address
- requires r0 for the other operand, which is not currently
- supported, so we can't use the 'o' constraint.
- Thus we must check for and handle r0+REG addresses here.
- We punt for now, since this is likely very rare. */
- if (GET_CODE (XEXP (inside, 1)) == REG)
- abort ();
- }
- else if (GET_CODE (inside) == LABEL_REF)
- return "mov.l %1,%0\n\tmov.l %1+4,%T0";
- else if (GET_CODE (inside) == POST_INC)
- return "mov.l %1,%0\n\tmov.l %1,%T0";
- else
- abort ();
-
- /* Work out the safe way to copy. Copy into the second half first. */
- if (dreg == ptrreg)
- return "mov.l %T1,%T0\n\tmov.l %1,%0";
- }
-
- return "mov.l %1,%0\n\tmov.l %T1,%T0";
- }
-
- /* Print an instruction which would have gone into a delay slot after
- another instruction, but couldn't because the other instruction expanded
- into a sequence where putting the slot insn at the end wouldn't work. */
-
- static void
- print_slot (insn)
- rtx insn;
- {
- final_scan_insn (XVECEXP (insn, 0, 1), asm_out_file, optimize, 0, 1);
-
- INSN_DELETED_P (XVECEXP (insn, 0, 1)) = 1;
- }
-
- /* We can't tell if we need a register as a scratch for the jump
- until after branch shortening, and then it's too late to allocate a
- register the 'proper' way. These instruction sequences are rare
- anyway, so to avoid always using a reg up from our limited set, we'll
- grab one when we need one on output. */
-
- /* ??? Should fix compiler so that using a clobber scratch in jump
- instructions works, and then this will be unnecessary. */
-
- char *
- output_far_jump (insn, op)
- rtx insn;
- rtx op;
- {
- rtx thislab = gen_label_rtx ();
-
- /* Output the delay slot insn first if any. */
- if (dbr_sequence_length ())
- print_slot (final_sequence);
-
- output_asm_insn ("mov.l r13,@-r15", 0);
- output_asm_insn ("mov.l %O0,r13", &thislab);
- output_asm_insn ("jmp @r13", 0);
- output_asm_insn ("mov.l @r15+,r13", 0);
- output_asm_insn (".align 2", 0);
- ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L", CODE_LABEL_NUMBER (thislab));
- output_asm_insn (".long %O0", &op);
- return "";
- }
-
- /* Local label counter, used for constants in the pool and inside
- pattern branches. */
-
- static int lf = 100;
-
- /* Output code for ordinary branches. */
-
- char *
- output_branch (logic, insn, operands)
- int logic;
- rtx insn;
- rtx *operands;
- {
- int label = lf++;
-
- switch (get_attr_length (insn))
- {
- case 2:
- /* A branch with an unfilled delay slot. */
- case 4:
- /* Simple branch in range -252..+258 bytes */
- return logic ? "bt%. %l0" : "bf%. %l0";
-
- case 6:
- /* A branch with an unfilled delay slot. */
- case 8:
- /* Branch in range -4092..+4098 bytes. */
- {
- /* The call to print_slot will clobber the operands. */
- rtx op0 = operands[0];
-
- /* If the instruction in the delay slot is annulled (true), then
- there is no delay slot where we can put it now. The only safe
- place for it is after the label. */
-
- if (final_sequence)
- {
- fprintf (asm_out_file, "\tb%c%s\tLF%d\n", logic ? 'f' : 't',
- INSN_ANNULLED_BRANCH_P (XVECEXP (final_sequence, 0, 0))
- ? "" : ".s", label);
- if (! INSN_ANNULLED_BRANCH_P (XVECEXP (final_sequence, 0, 0)))
- print_slot (final_sequence);
- }
- else
- fprintf (asm_out_file, "\tb%c\tLF%d\n", logic ? 'f' : 't', label);
-
- output_asm_insn ("bra %l0", &op0);
- fprintf (asm_out_file, "\tnop\n");
- fprintf (asm_out_file, "LF%d:\n", label);
-
- if (final_sequence
- && INSN_ANNULLED_BRANCH_P (XVECEXP (final_sequence, 0, 0)))
- print_slot (final_sequence);
- }
- return "";
-
- case 16:
- /* A branch with an unfilled delay slot. */
- case 18:
- /* Branches a long way away. */
- {
- /* The call to print_slot will clobber the operands. */
- rtx op0 = operands[0];
-
- /* If the instruction in the delay slot is annulled (true), then
- there is no delay slot where we can put it now. The only safe
- place for it is after the label. */
-
- if (final_sequence)
- {
- fprintf (asm_out_file, "\tb%c%s\tLF%d\n", logic ? 'f' : 't',
- INSN_ANNULLED_BRANCH_P (XVECEXP (final_sequence, 0, 0))
- ? "" : ".s", label);
- if (! INSN_ANNULLED_BRANCH_P (XVECEXP (final_sequence, 0, 0)))
- print_slot (final_sequence);
- }
- else
- fprintf (asm_out_file, "\tb%c\tLF%d\n", logic ? 'f' : 't', label);
-
- output_far_jump (insn, op0);
- fprintf (asm_out_file, "LF%d:\n", label);
-
- if (final_sequence
- && INSN_ANNULLED_BRANCH_P (XVECEXP (final_sequence, 0, 0)))
- print_slot (final_sequence);
- }
- return "";
- }
- return "bad";
- }
-
- /* A copy of the option structure defined in toplev.c. */
-
- struct option
- {
- char *string;
- int *variable;
- int on_value;
- };
-
- /* Output a single output option string NAME to FILE, without generating
- lines longer than MAX. */
-
- static int
- output_option (file, sep, type, name, indent, pos, max)
- FILE *file;
- char *sep;
- char *type;
- char *name;
- char *indent;
- int pos;
- int max;
- {
- if (strlen (sep) + strlen (type) + strlen (name) + pos > max)
- {
- fprintf (file, indent);
- return fprintf (file, "%s%s", type, name);
- }
- return pos + fprintf (file, "%s%s%s", sep, type, name);
- }
-
- /* A copy of the target_switches variable in toplev.c. */
-
- static struct
- {
- char *name;
- int value;
- } m_options[] = TARGET_SWITCHES;
-
- /* Output all options to the assembly language file. */
-
- static void
- output_options (file, f_options, f_len, W_options, W_len,
- pos, max, sep, indent, term)
- FILE *file;
- struct option *f_options;
- struct option *W_options;
- int f_len, W_len;
- int pos;
- int max;
- char *sep;
- char *indent;
- char *term;
- {
- register int j;
-
- if (optimize)
- pos = output_option (file, sep, "-O", "", indent, pos, max);
- if (write_symbols != NO_DEBUG)
- pos = output_option (file, sep, "-g", "", indent, pos, max);
- if (profile_flag)
- pos = output_option (file, sep, "-p", "", indent, pos, max);
- if (profile_block_flag)
- pos = output_option (file, sep, "-a", "", indent, pos, max);
-
- for (j = 0; j < f_len; j++)
- if (*f_options[j].variable == f_options[j].on_value)
- pos = output_option (file, sep, "-f", f_options[j].string,
- indent, pos, max);
-
- for (j = 0; j < W_len; j++)
- if (*W_options[j].variable == W_options[j].on_value)
- pos = output_option (file, sep, "-W", W_options[j].string,
- indent, pos, max);
-
- for (j = 0; j < sizeof m_options / sizeof m_options[0]; j++)
- if (m_options[j].name[0] != '\0'
- && m_options[j].value > 0
- && ((m_options[j].value & target_flags)
- == m_options[j].value))
- pos = output_option (file, sep, "-m", m_options[j].name,
- indent, pos, max);
-
- fprintf (file, term);
- }
-
- /* Output to FILE the start of the assembler file. */
-
- void
- output_file_start (file, f_options, f_len, W_options, W_len)
- FILE *file;
- struct option *f_options;
- struct option *W_options;
- int f_len, W_len;
- {
- register int pos;
-
- output_file_directive (file, main_input_filename);
-
- /* Switch to the data section so that the coffsem symbol and the
- gcc2_compiled. symbol aren't in the text section. */
- data_section ();
-
- pos = fprintf (file, "\n! Hitachi SH cc1 (%s) arguments:", version_string);
- output_options (file, f_options, f_len, W_options, W_len,
- pos, 75, " ", "\n! ", "\n\n");
-
- if (TARGET_LITTLE_ENDIAN)
- fprintf (file, "\t.little\n");
- }
-
- /* Actual number of instructions used to make a shift by N. */
- static char ashiftrt_insns[] =
- { 0,1,2,3,4,5,8,8,8,8,8,8,8,8,8,8,2,3,4,5,8,8,8,8,8,8,8,8,8,8,8,2};
-
- /* Left shift and logical right shift are the same. */
- static char shift_insns[] =
- { 0,1,1,2,2,3,3,4,1,2,2,3,3,4,3,3,1,2,2,3,3,4,3,3,2,3,3,4,4,4,3,3};
-
- /* Individual shift amounts needed to get the above length sequences.
- One bit right shifts clobber the T bit, so when possible, put one bit
- shifts in the middle of the sequence, so the ends are eligible for
- branch delay slots. */
- static short shift_amounts[32][5] = {
- {0}, {1}, {2}, {2, 1},
- {2, 2}, {2, 1, 2}, {2, 2, 2}, {2, 2, 1, 2},
- {8}, {8, 1}, {8, 2}, {8, 1, 2},
- {8, 2, 2}, {8, 2, 1, 2}, {8, -2, 8}, {8, -1, 8},
- {16}, {16, 1}, {16, 2}, {16, 1, 2},
- {16, 2, 2}, {16, 2, 1, 2}, {16, -2, 8}, {16, -1, 8},
- {16, 8}, {16, 1, 8}, {16, 8, 2}, {16, 8, 1, 2},
- {16, 8, 2, 2}, {16, -1, -2, 16}, {16, -2, 16}, {16, -1, 16}};
-
- /* This is used in length attributes in sh.md to help compute the length
- of arbitrary constant shift instructions. */
-
- int
- shift_insns_rtx (insn)
- rtx insn;
- {
- rtx set_src = SET_SRC (XVECEXP (PATTERN (insn), 0, 0));
- int shift_count = INTVAL (XEXP (set_src, 1));
- enum rtx_code shift_code = GET_CODE (set_src);
-
- switch (shift_code)
- {
- case ASHIFTRT:
- return ashiftrt_insns[shift_count];
- case LSHIFTRT:
- case ASHIFT:
- return shift_insns[shift_count];
- default:
- abort();
- }
- }
-
- /* Return the cost of a shift. */
-
- int
- shiftcosts (x)
- rtx x;
- {
- int value = INTVAL (XEXP (x, 1));
-
- /* If shift by a non constant, then this will be expensive. */
- if (GET_CODE (XEXP (x, 1)) != CONST_INT)
- {
- if (TARGET_SH3)
- return 2;
- /* If not an sh3 then we don't even have an instruction for it. */
- return 20;
- }
-
- /* Otherwise, return the true cost in instructions. */
- if (GET_CODE (x) == ASHIFTRT)
- return ashiftrt_insns[value];
- else
- return shift_insns[value];
- }
-
- /* Return the cost of an AND operation. */
-
- int
- andcosts (x)
- rtx x;
- {
- int i;
-
- /* Anding with a register is a single cycle and instruction. */
- if (GET_CODE (XEXP (x, 1)) != CONST_INT)
- return 1;
-
- i = INTVAL (XEXP (x, 1));
- /* These constants are single cycle extu.[bw] instructions. */
- if (i == 0xff || i == 0xffff)
- return 1;
- /* Constants that can be used in an and immediate instruction is a single
- cycle, but this requires r0, so make it a little more expensive. */
- if (CONST_OK_FOR_L (i))
- return 2;
- /* Constants that can be loaded with a mov immediate and an and.
- This case is probably unnecessary. */
- if (CONST_OK_FOR_I (i))
- return 2;
- /* Any other constants requires a 2 cycle pc-relative load plus an and.
- This case is probably unnecessary. */
- return 3;
- }
-
- /* Return the cost of a multiply. */
- int
- multcosts (x)
- rtx x;
- {
- if (TARGET_SH2)
- {
- /* We have a mul insn, so we can never take more than the mul and the
- read of the mac reg, but count more because of the latency and extra
- reg usage. */
- if (TARGET_SMALLCODE)
- return 2;
- return 3;
- }
-
- /* If we're aiming at small code, then just count the number of
- insns in a multiply call sequence. */
- if (TARGET_SMALLCODE)
- return 5;
-
- /* Otherwise count all the insns in the routine we'd be calling too. */
- return 20;
- }
-
- /* Code to expand a shift. */
-
- void
- gen_ashift (type, n, reg)
- int type;
- int n;
- rtx reg;
- {
- /* Negative values here come from the shift_amounts array. */
- if (n < 0)
- {
- if (type == ASHIFT)
- type = LSHIFTRT;
- else
- type = ASHIFT;
- n = -n;
- }
-
- switch (type)
- {
- case ASHIFTRT:
- emit_insn (gen_ashrsi3_k (reg, reg, GEN_INT (n)));
- break;
- case LSHIFTRT:
- if (n == 1)
- emit_insn (gen_lshrsi3_m (reg, reg, GEN_INT (n)));
- else
- emit_insn (gen_lshrsi3_k (reg, reg, GEN_INT (n)));
- break;
- case ASHIFT:
- emit_insn (gen_ashlsi3_k (reg, reg, GEN_INT (n)));
- break;
- }
- }
-
- /* Output RTL to split a constant shift into its component SH constant
- shift instructions. */
-
- /* ??? For SH3, should reject constant shifts when slower than loading the
- shift count into a register? */
-
- int
- gen_shifty_op (code, operands)
- int code;
- rtx *operands;
- {
- int value = INTVAL (operands[2]);
- int max, i;
-
- if (value == 31)
- {
- if (code == LSHIFTRT)
- {
- emit_insn (gen_rotlsi3_1 (operands[0], operands[0]));
- emit_insn (gen_movt (operands[0]));
- return;
- }
- else if (code == ASHIFT)
- {
- /* There is a two instruction sequence for 31 bit left shifts,
- but it requires r0. */
- if (GET_CODE (operands[0]) == REG && REGNO (operands[0]) == 0)
- {
- emit_insn (gen_andsi3 (operands[0], operands[0], const1_rtx));
- emit_insn (gen_rotlsi3_31 (operands[0], operands[0]));
- return;
- }
- }
- }
-
- max = shift_insns[value];
- for (i = 0; i < max; i++)
- gen_ashift (code, shift_amounts[value][i], operands[0]);
- }
-
- /* Output RTL for an arithmetic right shift. */
-
- /* ??? Rewrite to use super-optimizer sequences. */
-
- int
- expand_ashiftrt (operands)
- rtx *operands;
- {
- rtx wrk;
- char func[18];
- tree func_name;
- int value;
-
- if (TARGET_SH3 && GET_CODE (operands[2]) != CONST_INT)
- {
- rtx count = copy_to_mode_reg (SImode, operands[2]);
- emit_insn (gen_negsi2 (count, count));
- emit_insn (gen_ashrsi3_d (operands[0], operands[1], count));
- return 1;
- }
- if (GET_CODE (operands[2]) != CONST_INT)
- return 0;
-
- value = INTVAL (operands[2]);
-
- if (value == 31)
- {
- emit_insn (gen_ashrsi2_31 (operands[0], operands[1]));
- return 1;
- }
- else if (value >= 16 && value <= 19)
- {
- wrk = gen_reg_rtx (SImode);
- emit_insn (gen_ashrsi2_16 (wrk, operands[1]));
- value -= 16;
- while (value--)
- gen_ashift (ASHIFTRT, 1, wrk);
- emit_move_insn (operands[0], wrk);
- return 1;
- }
- /* Expand a short sequence inline, longer call a magic routine. */
- else if (value <= 5)
- {
- wrk = gen_reg_rtx (SImode);
- emit_move_insn (wrk, operands[1]);
- while (value--)
- gen_ashift (ASHIFTRT, 1, wrk);
- emit_move_insn (operands[0], wrk);
- return 1;
- }
-
- wrk = gen_reg_rtx (Pmode);
-
- /* Load the value into an arg reg and call a helper. */
- emit_move_insn (gen_rtx (REG, SImode, 4), operands[1]);
- sprintf (func, "__ashiftrt_r4_%d", value);
- func_name = get_identifier (func);
- emit_move_insn (wrk, gen_rtx (SYMBOL_REF, Pmode,
- IDENTIFIER_POINTER (func_name)));
- emit_insn (gen_ashrsi3_n (GEN_INT (value), wrk));
- emit_move_insn (operands[0], gen_rtx (REG, SImode, 4));
- return 1;
- }
-
- /* The SH cannot load a large constant into a register, constants have to
- come from a pc relative load. The reference of a pc relative load
- instruction must be less than 1k infront of the instruction. This
- means that we often have to dump a constant inside a function, and
- generate code to branch around it.
-
- It is important to minimize this, since the branches will slow things
- down and make things bigger.
-
- Worst case code looks like:
-
- mov.l L1,rn
- bra L2
- nop
- align
- L1: .long value
- L2:
- ..
-
- mov.l L3,rn
- bra L4
- nop
- align
- L3: .long value
- L4:
- ..
-
- We fix this by performing a scan before scheduling, which notices which
- instructions need to have their operands fetched from the constant table
- and builds the table.
-
- The algorithm is:
-
- scan, find an instruction which needs a pcrel move. Look forward, find the
- last barrier which is within MAX_COUNT bytes of the requirement.
- If there isn't one, make one. Process all the instructions between
- the find and the barrier.
-
- In the above example, we can tell that L3 is within 1k of L1, so
- the first move can be shrunk from the 3 insn+constant sequence into
- just 1 insn, and the constant moved to L3 to make:
-
- mov.l L1,rn
- ..
- mov.l L3,rn
- bra L4
- nop
- align
- L3:.long value
- L4:.long value
-
- Then the second move becomes the target for the shortening process. */
-
- typedef struct
- {
- rtx value; /* Value in table. */
- rtx label; /* Label of value. */
- enum machine_mode mode; /* Mode of value. */
- } pool_node;
-
- /* The maximum number of constants that can fit into one pool, since
- the pc relative range is 0...1020 bytes and constants are at least 4
- bytes long. */
-
- #define MAX_POOL_SIZE (1020/4)
- static pool_node pool_vector[MAX_POOL_SIZE];
- static int pool_size;
-
- /* ??? If we need a constant in HImode which is the truncated value of a
- constant we need in SImode, we could combine the two entries thus saving
- two bytes. Is this common enough to be worth the effort of implementing
- it? */
-
- /* ??? This stuff should be done at the same time that we shorten branches.
- As it is now, we must assume that all branches are the maximum size, and
- this causes us to almost always output constant pools sooner than
- necessary. */
-
- /* Add a constant to the pool and return its label. */
-
- static rtx
- add_constant (x, mode)
- rtx x;
- enum machine_mode mode;
- {
- int i;
- rtx lab;
-
- /* First see if we've already got it. */
- for (i = 0; i < pool_size; i++)
- {
- if (x->code == pool_vector[i].value->code
- && mode == pool_vector[i].mode)
- {
- if (x->code == CODE_LABEL)
- {
- if (XINT (x, 3) != XINT (pool_vector[i].value, 3))
- continue;
- }
- if (rtx_equal_p (x, pool_vector[i].value))
- return pool_vector[i].label;
- }
- }
-
- /* Need a new one. */
- pool_vector[pool_size].value = x;
- lab = gen_label_rtx ();
- pool_vector[pool_size].mode = mode;
- pool_vector[pool_size].label = lab;
- pool_size++;
- return lab;
- }
-
- /* Output the literal table. */
-
- static void
- dump_table (scan)
- rtx scan;
- {
- int i;
- int need_align = 1;
-
- /* Do two passes, first time dump out the HI sized constants. */
-
- for (i = 0; i < pool_size; i++)
- {
- pool_node *p = &pool_vector[i];
-
- if (p->mode == HImode)
- {
- if (need_align)
- {
- scan = emit_insn_after (gen_align_2 (), scan);
- need_align = 0;
- }
- scan = emit_label_after (p->label, scan);
- scan = emit_insn_after (gen_consttable_2 (p->value), scan);
- }
- }
-
- need_align = 1;
-
- for (i = 0; i < pool_size; i++)
- {
- pool_node *p = &pool_vector[i];
-
- switch (p->mode)
- {
- case HImode:
- break;
- case SImode:
- if (need_align)
- {
- need_align = 0;
- scan = emit_label_after (gen_label_rtx (), scan);
- scan = emit_insn_after (gen_align_4 (), scan);
- }
- scan = emit_label_after (p->label, scan);
- scan = emit_insn_after (gen_consttable_4 (p->value), scan);
- break;
- case DImode:
- if (need_align)
- {
- need_align = 0;
- scan = emit_label_after (gen_label_rtx (), scan);
- scan = emit_insn_after (gen_align_4 (), scan);
- }
- scan = emit_label_after (p->label, scan);
- scan = emit_insn_after (gen_consttable_8 (p->value), scan);
- break;
- default:
- abort ();
- break;
- }
- }
-
- scan = emit_insn_after (gen_consttable_end (), scan);
- scan = emit_barrier_after (scan);
- pool_size = 0;
- }
-
- /* Return non-zero if constant would be an ok source for a
- mov.w instead of a mov.l. */
-
- static int
- hi_const (src)
- rtx src;
- {
- return (GET_CODE (src) == CONST_INT
- && INTVAL (src) >= -32768
- && INTVAL (src) <= 32767);
- }
-
- /* Non-zero if the insn is a move instruction which needs to be fixed. */
-
- /* ??? For a DImode/DFmode moves, we don't need to fix it if each half of the
- CONST_DOUBLE input value is CONST_OK_FOR_I. For a SFmode move, we don't
- need to fix it if the input value is CONST_OK_FOR_I. */
-
- static int
- broken_move (insn)
- rtx insn;
- {
- if (GET_CODE (insn) == INSN
- && GET_CODE (PATTERN (insn)) == SET
- /* We can load any 8 bit value if we don't care what the high
- order bits end up as. */
- && GET_MODE (SET_DEST (PATTERN (insn))) != QImode
- && CONSTANT_P (SET_SRC (PATTERN (insn)))
- && (GET_CODE (SET_SRC (PATTERN (insn))) != CONST_INT
- || ! CONST_OK_FOR_I (INTVAL (SET_SRC (PATTERN (insn))))))
- return 1;
-
- return 0;
- }
-
- /* Find the last barrier from insn FROM which is close enough to hold the
- constant pool. If we can't find one, then create one near the end of
- the range. */
-
- /* ??? It would be good to put constant pool tables between a case jump and
- the jump table. This fails for two reasons. First, there is no
- barrier after the case jump. This is a bug in the casesi pattern.
- Second, inserting the table here may break the mova instruction that
- loads the jump table address, by moving the jump table too far away.
- We fix that problem by never outputting the constant pool between a mova
- and its label. */
-
- static rtx
- find_barrier (from)
- rtx from;
- {
- int count_si = 0;
- int count_hi = 0;
- int found_hi = 0;
- int found_si = 0;
- rtx found_barrier = 0;
- rtx found_mova = 0;
-
- /* For HImode: range is 510, add 4 because pc counts from address of
- second instruction after this one, subtract 2 for the jump instruction
- that we may need to emit before the table. This gives 512.
- For SImode: range is 1020, add 4 because pc counts from address of
- second instruction after this one, subtract 2 in case pc is 2 byte
- aligned, subtract 2 for the jump instruction that we may need to emit
- before the table. This gives 1020. */
- while (from && count_si < 1020 && count_hi < 512)
- {
- int inc;
-
- if (GET_CODE (from) == BARRIER)
- found_barrier = from;
-
- /* Count the length of this insn - we assume that all moves will
- be 2 bytes long, except the DImode/DFmode movess. */
-
- if (broken_move (from))
- {
- rtx src = SET_SRC (PATTERN (from));
-
- if (hi_const (src))
- found_hi = 1;
- else
- found_si = 1;
- inc = (GET_MODE_SIZE (GET_MODE (src)) > 4) ? 4 : 2;
- }
- else
- inc = get_attr_length (from);
-
- if (GET_CODE (from) == INSN
- && GET_CODE (PATTERN (from)) == SET
- && GET_CODE (SET_SRC (PATTERN (from))) == UNSPEC
- && XINT (SET_SRC (PATTERN (from)), 1) == 1)
- found_mova = from;
- else if (GET_CODE (from) == JUMP_INSN
- && (GET_CODE (PATTERN (from)) == ADDR_VEC
- || GET_CODE (PATTERN (from)) == ADDR_DIFF_VEC))
- found_mova = 0;
-
- if (found_si)
- count_si += inc;
- if (found_hi)
- count_hi += inc;
- from = NEXT_INSN (from);
- }
-
- /* Insert the constant pool table before the mova instruction, to prevent
- the mova label reference from going out of range. */
- if (found_mova)
- from = found_mova;
-
- if (! found_barrier)
- {
- /* We didn't find a barrier in time to dump our stuff,
- so we'll make one. */
- rtx label = gen_label_rtx ();
-
- /* We went one instruction too far above. */
- from = PREV_INSN (from);
- /* Walk back to be just before any jump or label.
- Putting it before a label reduces the number of times the branch
- around the constant pool table will be hit. Putting it before
- a jump makes it more likely that the bra delay slot will be
- filled. */
- while (GET_CODE (from) == JUMP_INSN || GET_CODE (from) == NOTE
- || GET_CODE (from) == CODE_LABEL)
- from = PREV_INSN (from);
-
- from = emit_jump_insn_after (gen_jump (label), from);
- JUMP_LABEL (from) = label;
- found_barrier = emit_barrier_after (from);
- emit_label_after (label, found_barrier);
- }
-
- return found_barrier;
- }
-
- /* Exported to toplev.c.
-
- Scan the function looking for move instructions which have to be changed to
- pc-relative loads and insert the literal tables. */
-
- void
- machine_dependent_reorg (first)
- rtx first;
- {
- rtx insn;
-
- for (insn = first; insn; insn = NEXT_INSN (insn))
- {
- if (broken_move (insn))
- {
- rtx scan;
- /* Scan ahead looking for a barrier to stick the constant table
- behind. */
- rtx barrier = find_barrier (insn);
-
- /* Now find all the moves between the points and modify them. */
- for (scan = insn; scan != barrier; scan = NEXT_INSN (scan))
- {
- if (broken_move (scan))
- {
- rtx pat = PATTERN (scan);
- rtx src = SET_SRC (pat);
- rtx dst = SET_DEST (pat);
- enum machine_mode mode = GET_MODE (dst);
- rtx lab;
- rtx newinsn;
- rtx newsrc;
-
- if (mode == SImode && hi_const (src))
- {
- int offset = 0;
-
- mode = HImode;
- while (GET_CODE (dst) == SUBREG)
- {
- offset += SUBREG_WORD (dst);
- dst = SUBREG_REG (dst);
- }
- dst = gen_rtx (REG, HImode, REGNO (dst) + offset);
- }
-
- lab = add_constant (src, mode);
- newsrc = gen_rtx (MEM, mode,
- gen_rtx (LABEL_REF, VOIDmode, lab));
- RTX_UNCHANGING_P (newsrc) = 1;
- newinsn = emit_insn_after (gen_rtx (SET, VOIDmode,
- dst, newsrc), scan);
-
- delete_insn (scan);
- scan = newinsn;
- }
- }
- dump_table (barrier);
- }
- }
- }
-
- /* Dump out instruction addresses, which is useful for debugging the
- constant pool table stuff. */
-
- /* ??? This is unnecessary, and probably should be deleted. This makes
- the insn_addresses declaration above unnecessary. */
-
- /* ??? The addresses printed by this routine for insns are nonsense for
- insns which are inside of a sequence where none of the inner insns have
- variable length. This is because the second pass of shorten_branches
- does not bother to update them. */
-
- void
- final_prescan_insn (insn, opvec, noperands)
- rtx insn;
- rtx *opvec;
- int noperands;
- {
- if (TARGET_DUMPISIZE)
- fprintf (asm_out_file, "\n! at %04x\n", insn_addresses[INSN_UID (insn)]);
- }
-
- /* Dump out any constants accumulated in the final pass. These will
- will only be labels. */
-
- char *
- output_jump_label_table ()
- {
- int i;
-
- if (pool_size)
- {
- fprintf (asm_out_file, "\t.align 2\n");
- for (i = 0; i < pool_size; i++)
- {
- pool_node *p = &pool_vector[i];
-
- ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
- CODE_LABEL_NUMBER (p->label));
- output_asm_insn (".long %O0", &p->value);
- }
- pool_size = 0;
- }
-
- return "";
- }
-
- /* A full frame looks like:
-
- arg-5
- arg-4
- [ if current_function_anonymous_args
- arg-3
- arg-2
- arg-1
- arg-0 ]
- saved-fp
- saved-r10
- saved-r11
- saved-r12
- saved-pr
- local-n
- ..
- local-1
- local-0 <- fp points here. */
-
- /* Number of bytes pushed for anonymous args, used to pass information
- between expand_prologue and expand_epilogue. */
-
- static int extra_push;
-
- /* Adjust the stack and return the number of bytes taken to do it. */
-
- static void
- output_stack_adjust (size)
- int size;
- {
- if (size)
- {
- rtx val = GEN_INT (size);
- rtx insn;
-
- if (! CONST_OK_FOR_I (size))
- {
- rtx reg = gen_rtx (REG, SImode, 3);
- emit_insn (gen_movsi (reg, val));
- val = reg;
- }
-
- insn = gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, val);
- emit_insn (insn);
- }
- }
-
- /* Output RTL to push register RN onto the stack. */
-
- static void
- push (rn)
- int rn;
- {
- rtx x;
- x = emit_insn (gen_push (gen_rtx (REG, SImode, rn)));
- REG_NOTES (x) = gen_rtx (EXPR_LIST, REG_INC,
- gen_rtx(REG, SImode, STACK_POINTER_REGNUM), 0);
- }
-
- /* Output RTL to pop register RN from the stack. */
-
- static void
- pop (rn)
- int rn;
- {
- rtx x;
- x = emit_insn (gen_pop (gen_rtx (REG, SImode, rn)));
- REG_NOTES (x) = gen_rtx (EXPR_LIST, REG_INC,
- gen_rtx(REG, SImode, STACK_POINTER_REGNUM), 0);
- }
-
- /* Generate code to push the regs specified in the mask, and return
- the number of bytes the insns take. */
-
- static void
- push_regs (mask)
- int mask;
- {
- int i;
-
- for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- if (mask & (1 << i))
- push (i);
- }
-
- /* Work out the registers which need to be saved, both as a mask and a
- count.
-
- If doing a pragma interrupt function, then push all regs used by the
- function, and if we call another function (we can tell by looking at PR),
- make sure that all the regs it clobbers are safe too. */
-
- static int
- calc_live_regs (count_ptr)
- int *count_ptr;
- {
- int reg;
- int live_regs_mask = 0;
- int count = 0;
-
- for (reg = 0; reg < FIRST_PSEUDO_REGISTER; reg++)
- {
- if (pragma_interrupt && ! pragma_trapa)
- {
- /* Need to save all the regs ever live. */
- if ((regs_ever_live[reg]
- || (call_used_regs[reg] && regs_ever_live[PR_REG]))
- && reg != STACK_POINTER_REGNUM && reg != ARG_POINTER_REGNUM
- && reg != T_REG && reg != GBR_REG)
- {
- live_regs_mask |= 1 << reg;
- count++;
- }
- }
- else
- {
- /* Only push those regs which are used and need to be saved. */
- if (regs_ever_live[reg] && ! call_used_regs[reg])
- {
- live_regs_mask |= (1 << reg);
- count++;
- }
- }
- }
-
- *count_ptr = count;
- return live_regs_mask;
- }
-
- /* Code to generate prologue and epilogue sequences */
-
- void
- sh_expand_prologue ()
- {
- int live_regs_mask;
- int d, i;
- live_regs_mask = calc_live_regs (&d);
-
- /* We have pretend args if we had an object sent partially in registers
- and partially on the stack, e.g. a large structure. */
- output_stack_adjust (-current_function_pretend_args_size);
-
- extra_push = 0;
-
- /* This is set by SETUP_VARARGS to indicate that this is a varargs
- routine. Clear it here so that the next function isn't affected. */
- if (current_function_anonymous_args)
- {
- current_function_anonymous_args = 0;
-
- /* Push arg regs as if they'd been provided by caller in stack. */
- for (i = 0; i < NPARM_REGS; i++)
- {
- int rn = NPARM_REGS + FIRST_PARM_REG - i - 1;
- if (i > (NPARM_REGS - current_function_args_info
- - current_function_varargs))
- break;
- push (rn);
- extra_push += 4;
- }
- }
- push_regs (live_regs_mask);
- output_stack_adjust (-get_frame_size ());
-
- if (frame_pointer_needed)
- emit_insn (gen_movsi (frame_pointer_rtx, stack_pointer_rtx));
- }
-
- void
- sh_expand_epilogue ()
- {
- int live_regs_mask;
- int d, i;
-
- live_regs_mask = calc_live_regs (&d);
-
- if (frame_pointer_needed)
- emit_insn (gen_movsi (stack_pointer_rtx, frame_pointer_rtx));
-
- output_stack_adjust (get_frame_size ());
-
- /* Pop all the registers. */
-
- for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
- {
- int j = (FIRST_PSEUDO_REGISTER - 1) - i;
- if (live_regs_mask & (1 << j))
- pop (j);
- }
-
- output_stack_adjust (extra_push + current_function_pretend_args_size);
- }
-
- /* Clear variables at function end. */
-
- void
- function_epilogue (stream, size)
- FILE *stream;
- int size;
- {
- pragma_interrupt = pragma_trapa = 0;
- }
-
- /* Define the offset between two registers, one to be eliminated, and
- the other its replacement, at the start of a routine. */
-
- int
- initial_elimination_offset (from, to)
- int from;
- int to;
- {
- int regs_saved;
- int total_saved_regs_space;
- int total_auto_space = get_frame_size ();
-
- calc_live_regs (®s_saved);
- total_saved_regs_space = (regs_saved) * 4;
-
- if (from == ARG_POINTER_REGNUM && to == FRAME_POINTER_REGNUM)
- return total_saved_regs_space + total_auto_space;
-
- if (from == ARG_POINTER_REGNUM && to == STACK_POINTER_REGNUM)
- return total_saved_regs_space + total_auto_space;
-
- /* Initial gap between fp and sp is 0. */
- if (from == FRAME_POINTER_REGNUM && to == STACK_POINTER_REGNUM)
- return 0;
-
- abort ();
- }
-
- /* Handle machine specific pragmas to be semi-compatible with Hitachi
- compiler. */
-
- int
- handle_pragma (file)
- FILE *file;
- {
- int c;
- char pbuf[200];
- int psize = 0;
-
- c = getc (file);
- while (c == ' ' || c == '\t')
- c = getc (file);
-
- if (c == '\n' || c == EOF)
- return c;
-
- while (psize < sizeof (pbuf) - 1 && c != '\n')
- {
- pbuf[psize++] = c;
- if (psize == 9 && strncmp (pbuf, "interrupt", 9) == 0)
- {
- pragma_interrupt = 1;
- return ' ';
- }
- if (psize == 5 && strncmp (pbuf, "trapa", 5) == 0)
- {
- pragma_interrupt = pragma_trapa = 1;
- return ' ';
- }
- c = getc (file);
- }
- return c;
- }
-
- /* Predicates used by the templates. */
-
- /* Returns 1 if OP is MACL, MACH or PR. The input must be a REG rtx.
- Used only in general_movsrc_operand. */
-
- int
- system_reg_operand (op, mode)
- rtx op;
- enum machine_mode mode;
- {
- switch (REGNO (op))
- {
- case PR_REG:
- case MACL_REG:
- case MACH_REG:
- return 1;
- }
- return 0;
- }
-
- /* Returns 1 if OP can be source of a simple move operation.
- Same as general_operand, but a LABEL_REF is valid, PRE_DEC is
- invalid as are subregs of system registers. */
-
- int
- general_movsrc_operand (op, mode)
- rtx op;
- enum machine_mode mode;
- {
- if (GET_CODE (op) == MEM)
- {
- rtx inside = XEXP (op, 0);
- if (GET_CODE (inside) == CONST)
- inside = XEXP (inside, 0);
-
- if (GET_CODE (inside) == LABEL_REF)
- return 1;
-
- if (GET_CODE (inside) == PLUS
- && GET_CODE (XEXP (inside, 0)) == LABEL_REF
- && GET_CODE (XEXP (inside, 1)) == CONST_INT)
- return 1;
-
- /* Only post inc allowed. */
- if (GET_CODE (inside) == PRE_DEC)
- return 0;
- }
-
- if ((mode == QImode || mode == HImode)
- && (GET_CODE (op) == SUBREG
- && GET_CODE (XEXP (op, 0)) == REG
- && system_reg_operand (XEXP (op, 0), mode)))
- return 0;
-
- return general_operand (op, mode);
- }
-
- /* Returns 1 if OP can be a destination of a move.
- Same as general_operand, but no preinc allowed. */
-
- int
- general_movdst_operand (op, mode)
- rtx op;
- enum machine_mode mode;
- {
- /* Only pre dec allowed. */
- if (GET_CODE (op) == MEM && GET_CODE (XEXP (op, 0)) == POST_INC)
- return 0;
-
- return general_operand (op, mode);
- }
-
- /* Returns 1 if OP is a normal arithmetic register. */
-
- int
- arith_reg_operand (op, mode)
- rtx op;
- enum machine_mode mode;
- {
- if (register_operand (op, mode))
- {
- if (GET_CODE (op) == REG)
- return (REGNO (op) != T_REG
- && REGNO (op) != PR_REG
- && REGNO (op) != MACH_REG
- && REGNO (op) != MACL_REG);
- return 1;
- }
- return 0;
- }
-
- /* Returns 1 if OP is a valid source operand for an arithmetic insn. */
-
- int
- arith_operand (op, mode)
- rtx op;
- enum machine_mode mode;
- {
- if (arith_reg_operand (op, mode))
- return 1;
-
- if (GET_CODE (op) == CONST_INT && CONST_OK_FOR_I (INTVAL (op)))
- return 1;
-
- return 0;
- }
-
- /* Returns 1 if OP is a valid source operand for a compare insn. */
-
- int
- arith_reg_or_0_operand (op, mode)
- rtx op;
- enum machine_mode mode;
- {
- if (arith_reg_operand (op, mode))
- return 1;
-
- if (GET_CODE (op) == CONST_INT && CONST_OK_FOR_N (INTVAL (op)))
- return 1;
-
- return 0;
- }
-
- /* Returns 1 if OP is a valid source operand for a logical operation. */
-
- int
- logical_operand (op, mode)
- rtx op;
- enum machine_mode mode;
- {
- if (arith_reg_operand (op, mode))
- return 1;
-
- if (GET_CODE (op) == CONST_INT && CONST_OK_FOR_L (INTVAL (op)))
- return 1;
-
- return 0;
- }
-
- /* Determine where to put an argument to a function.
- Value is zero to push the argument on the stack,
- or a hard register in which to store the argument.
-
- MODE is the argument's machine mode.
- TYPE is the data type of the argument (as a tree).
- This is null for libcalls where that information may
- not be available.
- CUM is a variable of type CUMULATIVE_ARGS which gives info about
- the preceding args and about the function being called.
- NAMED is nonzero if this argument is a named parameter
- (otherwise it is an extra parameter matching an ellipsis). */
-
- rtx
- sh_function_arg (cum, mode, type, named)
- CUMULATIVE_ARGS cum;
- enum machine_mode mode;
- tree type;
- int named;
- {
- if (named)
- {
- int rr = (ROUND_REG (cum, mode));
-
- if (rr < NPARM_REGS)
- return ((type == 0 || ! TREE_ADDRESSABLE (type))
- ? gen_rtx (REG, mode, FIRST_PARM_REG + rr) : 0);
- }
- return 0;
- }
-
- /* For an arg passed partly in registers and partly in memory,
- this is the number of registers used.
- For args passed entirely in registers or entirely in memory, zero.
- Any arg that starts in the first 4 regs but won't entirely fit in them
- needs partial registers on the SH. */
-
- int
- sh_function_arg_partial_nregs (cum, mode, type, named)
- CUMULATIVE_ARGS cum;
- enum machine_mode mode;
- tree type;
- int named;
- {
- if (cum < NPARM_REGS)
- {
- if ((type == 0 || ! TREE_ADDRESSABLE (type))
- && (cum + (mode == BLKmode
- ? ROUND_ADVANCE (int_size_in_bytes (type))
- : ROUND_ADVANCE (GET_MODE_SIZE (mode))) - NPARM_REGS > 0))
- return NPARM_REGS - cum;
- }
- return 0;
- }
-