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Diffstat (limited to 'gcc/config/h8300/h8300.c')
| -rwxr-xr-x | gcc/config/h8300/h8300.c | 3143 |
1 files changed, 3143 insertions, 0 deletions
diff --git a/gcc/config/h8300/h8300.c b/gcc/config/h8300/h8300.c new file mode 100755 index 0000000..0870ede --- /dev/null +++ b/gcc/config/h8300/h8300.c @@ -0,0 +1,3143 @@ +/* Subroutines for insn-output.c for Hitachi H8/300. + Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc. + Contributed by Steve Chamberlain (sac@cygnus.com), + Jim Wilson (wilson@cygnus.com), and Doug Evans (dje@cygnus.com). + +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. */ + +#include "config.h" +#include <stdio.h> +#include "rtl.h" +#include "regs.h" +#include "hard-reg-set.h" +#include "real.h" +#include "insn-config.h" +#include "conditions.h" +#include "insn-flags.h" +#include "output.h" +#include "insn-attr.h" +#include "flags.h" +#include "recog.h" +#include "expr.h" +#include "tree.h" +#include "obstack.h" + +/* Forward declarations. */ +void print_operand_address (); +char *index (); + +static int h8300_interrupt_function_p PROTO ((tree)); +static int h8300_monitor_function_p PROTO ((tree)); +static int h8300_os_task_function_p PROTO ((tree)); + +/* CPU_TYPE, says what cpu we're compiling for. */ +int cpu_type; + +/* True if the current function is an interrupt handler + (either via #pragma or an attribute specification). */ +int interrupt_handler; + +/* True if the current function is an OS Task + (via an attribute specification). */ +int os_task; + +/* True if the current function is a monitor + (via an attribute specification). */ +int monitor; + +/* True if a #pragma saveall has been seen for the current function. */ +int pragma_saveall; + +static char *names_big[] = +{"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7"}; + +static char *names_extended[] = +{"er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"}; + +static char *names_upper_extended[] = +{"e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"}; + +/* Points to one of the above. */ +/* ??? The above could be put in an array indexed by CPU_TYPE. */ +char **h8_reg_names; + +/* Various operations needed by the following, indexed by CPU_TYPE. */ + +static char *h8_push_ops[2] = +{"push", "push.l"}; +static char *h8_pop_ops[2] = +{"pop", "pop.l"}; +static char *h8_mov_ops[2] = +{"mov.w", "mov.l"}; + +char *h8_push_op, *h8_pop_op, *h8_mov_op; + +/* Initialize various cpu specific globals at start up. */ + +void +h8300_init_once () +{ + if (TARGET_H8300) + { + cpu_type = (int) CPU_H8300; + h8_reg_names = names_big; + } + else + { + /* For this we treat the H8/300 and H8/S the same. */ + cpu_type = (int) CPU_H8300H; + h8_reg_names = names_extended; + } + h8_push_op = h8_push_ops[cpu_type]; + h8_pop_op = h8_pop_ops[cpu_type]; + h8_mov_op = h8_mov_ops[cpu_type]; +} + +char * +byte_reg (x, b) + rtx x; + int b; +{ + static char *names_small[] = + {"r0l", "r0h", "r1l", "r1h", "r2l", "r2h", "r3l", "r3h", + "r4l", "r4h", "r5l", "r5h", "r6l", "r6h", "r7l", "r7h"}; + + return names_small[REGNO (x) * 2 + b]; +} + +/* REGNO must be saved/restored across calls if this macro is true. */ + +#define WORD_REG_USED(regno) \ + (regno < 7 && \ + (interrupt_handler \ + || pragma_saveall \ + || (regno == FRAME_POINTER_REGNUM && regs_ever_live[regno]) \ + || (regs_ever_live[regno] && !call_used_regs[regno]))) + +/* Output assembly language to FILE for the operation OP with operand size + SIZE to adjust the stack pointer. */ + +static void +dosize (file, op, size) + FILE *file; + char *op; + unsigned int size; +{ + /* On the h8300h and h8300s, for sizes <= 8 bytes it is as good or + better to use adds/subs insns rather than add.l/sub.l + with an immediate value. */ + if (size > 4 && size <= 8 && (TARGET_H8300H || TARGET_H8300S)) + { + /* Crank the size down to <= 4 */ + fprintf (file, "\t%ss\t#%d,sp\n", op, 4); + size -= 4; + } + + switch (size) + { + case 4: + if (TARGET_H8300H || TARGET_H8300S) + { + fprintf (file, "\t%ss\t#%d,sp\n", op, 4); + size = 0; + break; + } + case 3: + fprintf (file, "\t%ss\t#%d,sp\n", op, 2); + size -= 2; + /* Fall through... */ + case 2: + case 1: + fprintf (file, "\t%ss\t#%d,sp\n", op, size); + size = 0; + break; + case 0: + break; + default: + if (TARGET_H8300) + { + if (current_function_needs_context + && strcmp (op, "sub") == 0) + { + /* Egad. We don't have a temporary to hold the + size of the frame in the prologue! Just inline + the bastard since this shouldn't happen often. */ + while (size >= 2) + { + fprintf (file, "\tsubs\t#2,sp\n"); + size -= 2; + } + + if (size) + fprintf (file, "\tsubs\t#1,sp\n"); + + size = 0; + } + else + fprintf (file, "\tmov.w\t#%d,r3\n\t%s.w\tr3,sp\n", size, op); + } + else + fprintf (file, "\t%s\t#%d,sp\n", op, size); + size = 0; + break; + } +} + +/* Output assembly language code for the function prologue. */ +static int push_order[FIRST_PSEUDO_REGISTER] = +{0, 1, 2, 3, 4, 5, 6, -1, -1, -1}; +static int pop_order[FIRST_PSEUDO_REGISTER] = +{6, 5, 4, 3, 2, 1, 0, -1, -1, -1}; + +/* This is what the stack looks like after the prolog of + a function with a frame has been set up: + + <args> + PC + FP <- fp + <locals> + <saved registers> <- sp + + This is what the stack looks like after the prolog of + a function which doesn't have a frame: + + <args> + PC + <locals> + <saved registers> <- sp +*/ + +void +function_prologue (file, size) + FILE *file; + int size; +{ + register int mask = 0; + int fsize = (size + STACK_BOUNDARY / 8 - 1) & -STACK_BOUNDARY / 8; + int idx; + + /* Note a function with the interrupt attribute and set interrupt_handler + accordingly. */ + if (h8300_interrupt_function_p (current_function_decl)) + interrupt_handler = 1; + + /* If the current function has the OS_Task attribute set, then + we have a naked prologue. */ + if (h8300_os_task_function_p (current_function_decl)) + { + fprintf (file, ";OS_Task prologue\n"); + os_task = 1; + return; + } + + if (h8300_monitor_function_p (current_function_decl)) + { + /* My understanding of monitor functions is they act just + like interrupt functions, except the prologue must + mask interrupts. */ + fprintf (file, ";monitor prologue\n"); + interrupt_handler = 1; + monitor = 1; + if (TARGET_H8300) + { + fprintf (file, "\tsubs\t#2,sp\n"); + fprintf (file, "\tpush\tr0\n"); + fprintf (file, "\tstc\tccr,r0l\n"); + fprintf (file, "\torc\t#128,ccr\n"); + fprintf (file, "\tmov.b\tr0l,@(4,sp)\n"); + } + else + { + fprintf (file, "\tpush\ter0\n"); + fprintf (file, "\tstc\tccr,r0l\n"); + fprintf (file, "\torc\t#128,ccr\n"); + fprintf (file, "\tmov.b\tr0l,@(4,sp)\n"); + } + } + + if (frame_pointer_needed) + { + /* Push fp */ + fprintf (file, "\t%s\t%s\n", h8_push_op, + h8_reg_names[FRAME_POINTER_REGNUM]); + fprintf (file, "\t%s\t%s,%s\n", h8_mov_op, + h8_reg_names[STACK_POINTER_REGNUM], + h8_reg_names[FRAME_POINTER_REGNUM]); + } + + /* leave room for locals */ + dosize (file, "sub", fsize); + + /* Push the rest of the registers */ + for (idx = 0; idx < FIRST_PSEUDO_REGISTER; idx++) + { + int regno = push_order[idx]; + + if (regno >= 0 + && WORD_REG_USED (regno) + && (!frame_pointer_needed || regno != FRAME_POINTER_REGNUM)) + { + if (TARGET_H8300S) + { + /* Try to push multiple registers. */ + if (regno == 0 || regno == 4) + { + int second_regno = push_order[idx + 1]; + int third_regno = push_order[idx + 2]; + int fourth_regno = push_order[idx + 3]; + + if (fourth_regno >= 0 + && WORD_REG_USED (fourth_regno) + && (!frame_pointer_needed + || fourth_regno != FRAME_POINTER_REGNUM) + && third_regno >= 0 + && WORD_REG_USED (third_regno) + && (!frame_pointer_needed + || third_regno != FRAME_POINTER_REGNUM) + && second_regno >= 0 + && WORD_REG_USED (second_regno) + && (!frame_pointer_needed + || second_regno != FRAME_POINTER_REGNUM)) + { + fprintf (file, "\tstm.l %s-%s,@-sp\n", + h8_reg_names[regno], + h8_reg_names[fourth_regno]); + idx += 3; + continue; + } + } + if (regno == 0 || regno == 4) + { + int second_regno = push_order[idx + 1]; + int third_regno = push_order[idx + 2]; + + if (third_regno >= 0 + && WORD_REG_USED (third_regno) + && (!frame_pointer_needed + || third_regno != FRAME_POINTER_REGNUM) + && second_regno >= 0 + && WORD_REG_USED (second_regno) + && (!frame_pointer_needed + || second_regno != FRAME_POINTER_REGNUM)) + { + fprintf (file, "\tstm.l %s-%s,@-sp\n", + h8_reg_names[regno], + h8_reg_names[third_regno]); + idx += 2; + continue; + } + } + if (regno == 0 || regno == 2 || regno == 4 || regno == 6) + { + int second_regno = push_order[idx + 1]; + + if (second_regno >= 0 + && WORD_REG_USED (second_regno) + && (!frame_pointer_needed + || second_regno != FRAME_POINTER_REGNUM)) + { + fprintf (file, "\tstm.l %s-%s,@-sp\n", + h8_reg_names[regno], + h8_reg_names[second_regno]); + idx += 1; + continue; + } + } + } + fprintf (file, "\t%s\t%s\n", h8_push_op, h8_reg_names[regno]); + } + } +} + +/* Output assembly language code for the function epilogue. */ + +void +function_epilogue (file, size) + FILE *file; + int size; +{ + register int regno; + register int mask = 0; + int fsize = (size + STACK_BOUNDARY / 8 - 1) & -STACK_BOUNDARY / 8; + int idx; + rtx insn = get_last_insn (); + + if (os_task) + { + /* OS_Task epilogues are nearly naked -- they just have an + rts instruction. */ + fprintf (file, ";OS_task epilogue\n"); + fprintf (file, "\trts\n"); + goto out; + } + + /* monitor epilogues are the same as interrupt function epilogues. + Just make a note that we're in an monitor epilogue. */ + if (monitor) + fprintf(file, ";monitor epilogue\n"); + + /* If the last insn was a BARRIER, we don't have to write any code. */ + if (GET_CODE (insn) == NOTE) + insn = prev_nonnote_insn (insn); + if (insn && GET_CODE (insn) == BARRIER) + return; + + /* Pop the saved registers. */ + for (idx = 0; idx < FIRST_PSEUDO_REGISTER; idx++) + { + int regno = pop_order[idx]; + + if (regno >= 0 + && WORD_REG_USED (regno) + && (!frame_pointer_needed || regno != FRAME_POINTER_REGNUM)) + { + if (TARGET_H8300S) + { + /* Try to pop multiple registers. */ + if (regno == 7 || regno == 3) + { + int second_regno = pop_order[idx + 1]; + int third_regno = pop_order[idx + 2]; + int fourth_regno = pop_order[idx + 3]; + + if (fourth_regno >= 0 + && WORD_REG_USED (fourth_regno) + && (!frame_pointer_needed + || fourth_regno != FRAME_POINTER_REGNUM) + && third_regno >= 0 + && WORD_REG_USED (third_regno) + && (!frame_pointer_needed + || third_regno != FRAME_POINTER_REGNUM) + && second_regno >= 0 + && WORD_REG_USED (second_regno) + && (!frame_pointer_needed + || second_regno != FRAME_POINTER_REGNUM)) + { + fprintf (file, "\tldm.l @sp+,%s-%s\n", + h8_reg_names[fourth_regno], + h8_reg_names[regno]); + idx += 3; + continue; + } + } + if (regno == 6 || regno == 2) + { + int second_regno = pop_order[idx + 1]; + int third_regno = pop_order[idx + 2]; + + if (third_regno >= 0 + && WORD_REG_USED (third_regno) + && (!frame_pointer_needed + || third_regno != FRAME_POINTER_REGNUM) + && second_regno >= 0 + && WORD_REG_USED (second_regno) + && (!frame_pointer_needed + || second_regno != FRAME_POINTER_REGNUM)) + { + fprintf (file, "\tldm.l @sp+,%s-%s\n", + h8_reg_names[third_regno], + h8_reg_names[regno]); + idx += 2; + continue; + } + } + if (regno == 7 || regno == 5 || regno == 3 || regno == 1) + { + int second_regno = pop_order[idx + 1]; + + if (second_regno >= 0 + && WORD_REG_USED (second_regno) + && (!frame_pointer_needed + || second_regno != FRAME_POINTER_REGNUM)) + { + fprintf (file, "\tldm.l @sp+,%s-%s\n", + h8_reg_names[second_regno], + h8_reg_names[regno]); + idx += 1; + continue; + } + } + } + fprintf (file, "\t%s\t%s\n", h8_pop_op, h8_reg_names[regno]); + } + } + + /* deallocate locals */ + dosize (file, "add", fsize); + + /* pop frame pointer if we had one. */ + if (frame_pointer_needed) + fprintf (file, "\t%s\t%s\n", h8_pop_op, h8_reg_names[FRAME_POINTER_REGNUM]); + + /* If this is a monitor function, there is one register still left on + the stack. */ + if (monitor) + fprintf (file, "\t%s\t%s\n", h8_pop_op, h8_reg_names[0]); + + if (interrupt_handler) + fprintf (file, "\trte\n"); + else + fprintf (file, "\trts\n"); + +out: + interrupt_handler = 0; + os_task = 0; + monitor = 0; + pragma_saveall = 0; +} + +/* Output assembly code for the start of the file. */ + +asm_file_start (file) + FILE *file; +{ + fprintf (file, ";\tGCC For the Hitachi H8/300\n"); + fprintf (file, ";\tBy Hitachi America Ltd and Cygnus Support\n"); + fprintf (file, ";\trelease F-1\n"); + if (optimize) + fprintf (file, "; -O%d\n", optimize); + if (TARGET_H8300H) + fprintf (file, "\n\t.h8300h\n"); + else if (TARGET_H8300S) + fprintf (file, "\n\t.h8300s\n"); + else + fprintf (file, "\n\n"); + output_file_directive (file, main_input_filename); +} + +/* Output assembly language code for the end of file. */ + +void +asm_file_end (file) + FILE *file; +{ + fprintf (file, "\t.end\n"); +} + +/* Return true if VALUE is a valid constant for constraint 'P'. + IE: VALUE is a power of two <= 2**15. */ + +int +small_power_of_two (value) + int value; +{ + switch (value) + { + case 1: + case 2: + case 4: + case 8: + case 16: + case 32: + case 64: + case 128: + case 256: + case 512: + case 1024: + case 2048: + case 4096: + case 8192: + case 16384: + case 32768: + return 1; + } + return 0; +} + +/* Return true if VALUE is a valid constant for constraint 'O', which + means that the constant would be ok to use as a bit for a bclr + instruction. */ + +int +ok_for_bclr (value) + int value; +{ + return small_power_of_two ((~value) & 0xff); +} + +/* Return true is OP is a valid source operand for an integer move + instruction. */ + +int +general_operand_src (op, mode) + rtx op; + enum machine_mode mode; +{ + if (GET_CODE (op) == MEM && GET_CODE (XEXP (op, 0)) == POST_INC) + return 1; + return general_operand (op, mode); +} + +/* Return true if OP is a valid destination operand for an integer move + instruction. */ + +int +general_operand_dst (op, mode) + rtx op; + enum machine_mode mode; +{ + if (GET_CODE (op) == MEM && GET_CODE (XEXP (op, 0)) == PRE_DEC) + return 1; + return general_operand (op, mode); +} + +/* Return true if OP is a const valid for a bit clear instruction. */ + +int +o_operand (operand, mode) + rtx operand; + enum machine_mode mode; +{ + return (GET_CODE (operand) == CONST_INT + && CONST_OK_FOR_O (INTVAL (operand))); +} + +/* Return true if OP is a const valid for a bit set or bit xor instruction. */ + +int +p_operand (operand, mode) + rtx operand; + enum machine_mode mode; +{ + return (GET_CODE (operand) == CONST_INT + && CONST_OK_FOR_P (INTVAL (operand))); +} + +/* Return true if OP is a valid call operand. */ + +int +call_insn_operand (op, mode) + rtx op; + enum machine_mode mode; +{ + if (GET_CODE (op) == MEM) + { + rtx inside = XEXP (op, 0); + if (register_operand (inside, Pmode)) + return 1; + if (CONSTANT_ADDRESS_P (inside)) + return 1; + } + return 0; +} + +int +adds_subs_operand (op, mode) + rtx op; + enum machine_mode mode; +{ + if (GET_CODE (op) == CONST_INT) + { + if (INTVAL (op) <= 4 && INTVAL (op) >= 0) + return 1; + if (INTVAL (op) >= -4 && INTVAL (op) <= 0) + return 1; + if ((TARGET_H8300H || TARGET_H8300S) + && INTVAL (op) != 7 + && (INTVAL (op) <= 8 && INTVAL (op) >= 0)) + return 1; + if ((TARGET_H8300H || TARGET_H8300S) + && INTVAL (op) != -7 + && (INTVAL (op) >= -8 && INTVAL (op) <= 0)) + return 1; + } + return 0; +} + +/* Return nonzero if op is an adds/subs operand which only requires + one insn to implement. It is assumed that OP is already an adds/subs + operand. */ +int +one_insn_adds_subs_operand (op, mode) + rtx op; + enum machine_mode mode; +{ + int val = INTVAL (op); + + if (val == 1 || val == -1 + || val == 2 || val == -2 + || ((TARGET_H8300H || TARGET_H8300S) + && (val == 4 || val == -4))) + return 1; + return 0; +} + +char * +output_adds_subs (operands) + rtx *operands; +{ + int val = INTVAL (operands[2]); + + /* First get the value into the range -4..4 inclusive. + + The only way it can be out of this range is when TARGET_H8300H + or TARGET_H8300S is true, thus it is safe to use adds #4 and subs #4. */ + if (val > 4) + { + output_asm_insn ("adds #4,%A0", operands); + val -= 4; + } + + if (val < -4) + { + output_asm_insn ("subs #4,%A0", operands); + val += 4; + } + + /* Handle case were val == 4 or val == -4 and we're compiling + for TARGET_H8300H or TARGET_H8300S. */ + if ((TARGET_H8300H || TARGET_H8300S) + && val == 4) + return "adds #4,%A0"; + + if ((TARGET_H8300H || TARGET_H8300S) + && val == -4) + return "subs #4,%A0"; + + if (val > 2) + { + output_asm_insn ("adds #2,%A0", operands); + val -= 2; + } + + if (val < -2) + { + output_asm_insn ("subs #2,%A0", operands); + val += 2; + } + + /* val should be one or two now. */ + if (val == 2) + return "adds #2,%A0"; + + if (val == -2) + return "subs #2,%A0"; + + /* val should be one now. */ + if (val == 1) + return "adds #1,%A0"; + + if (val == -1) + return "subs #1,%A0"; + + /* If not optimizing, we might be asked to add 0. */ + if (val == 0) + return ""; + + /* In theory, this can't happen. */ + abort (); +} + +/* Return true if OP is a valid call operand, and OP represents + an operand for a small call (4 bytes instead of 6 bytes). */ + +int +small_call_insn_operand (op, mode) + rtx op; + enum machine_mode mode; +{ + if (GET_CODE (op) == MEM) + { + rtx inside = XEXP (op, 0); + + /* Register indirect is a small call. */ + if (register_operand (inside, Pmode)) + return 1; + + /* A call through the function vector is a small + call too. */ + if (GET_CODE (inside) == SYMBOL_REF + && SYMBOL_REF_FLAG (inside)) + return 1; + } + /* Otherwise it's a large call. */ + return 0; +} + +/* Return true if OP is a valid jump operand. */ + +int +jump_address_operand (op, mode) + rtx op; + enum machine_mode mode; +{ + if (GET_CODE (op) == REG) + return mode == Pmode; + + if (GET_CODE (op) == MEM) + { + rtx inside = XEXP (op, 0); + if (register_operand (inside, Pmode)) + return 1; + if (CONSTANT_ADDRESS_P (inside)) + return 1; + } + return 0; +} + +/* Recognize valid operands for bitfield instructions. */ + +extern int rtx_equal_function_value_matters; + +int +bit_operand (op, mode) + rtx op; + enum machine_mode mode; +{ + /* We can except any general operand, expept that MEM operands must + be limited to those that use addresses valid for the 'U' constraint. */ + if (!general_operand (op, mode)) + return 0; + + /* Accept any mem during RTL generation. Otherwise, the code that does + insv and extzv will think that we can not handle memory. However, + to avoid reload problems, we only accept 'U' MEM operands after RTL + generation. This means that any named pattern which uses this predicate + must force its operands to match 'U' before emitting RTL. */ + + if (GET_CODE (op) == REG) + return 1; + if (GET_CODE (op) == SUBREG) + return 1; + if (!rtx_equal_function_value_matters) + { + /* We're building rtl */ + return GET_CODE (op) == MEM; + } + else + { + return (GET_CODE (op) == MEM + && EXTRA_CONSTRAINT (op, 'U')); + } +} + +int +bit_memory_operand (op, mode) + rtx op; + enum machine_mode mode; +{ + return (GET_CODE (op) == MEM + && EXTRA_CONSTRAINT (op, 'U')); +} + +/* Recognize valid operators for bit test. */ + +int +eq_operator (x, mode) + rtx x; + enum machine_mode mode; +{ + return (GET_CODE (x) == EQ || GET_CODE (x) == NE); +} + +/* Handle machine specific pragmas for compatibility with existing + compilers for the H8/300. + + pragma saveall generates prolog/epilog code which saves and + restores all the registers on function entry. + + pragma interrupt saves and restores all registers, and exits with + an rte instruction rather than an rts. A pointer to a function + with this attribute may be safely used in an interrupt vector. */ + +int +handle_pragma (p_getc, p_ungetc, pname) + int (* p_getc) PROTO ((void)); + void (* p_ungetc) PROTO ((int)); + char * pname; +{ + int retval = 0; + + if (strcmp (pname, "interrupt") == 0) + interrupt_handler = retval = 1; + else if (strcmp (pname, "saveall") == 0) + pragma_saveall = retval = 1; + + return retval; +} + +/* If the next arg with MODE and TYPE is to be passed in a register, return + the rtx to represent where it is passed. CUM represents the state after + the last argument. NAMED is not used. */ + +static char *hand_list[] = +{ + "__main", + "__cmpsi2", + "__divhi3", + "__modhi3", + "__udivhi3", + "__umodhi3", + "__divsi3", + "__modsi3", + "__udivsi3", + "__umodsi3", + "__mulhi3", + "__mulsi3", + "__reg_memcpy", + "__reg_memset", + "__ucmpsi2", + 0, +}; + +/* Return an RTX to represent where a value with mode MODE will be returned + from a function. If the result is 0, the argument is pushed. */ + +rtx +function_arg (cum, mode, type, named) + CUMULATIVE_ARGS *cum; + enum machine_mode mode; + tree type; + int named; +{ + rtx result = 0; + char *fname; + int regpass = 0; + + /* Never pass unnamed arguments in registers. */ + if (!named) + return 0; + + /* Pass 3 regs worth of data in regs when user asked on the command line. */ + if (TARGET_QUICKCALL) + regpass = 3; + + /* If calling hand written assembler, use 4 regs of args. */ + + if (cum->libcall) + { + char **p; + + fname = XSTR (cum->libcall, 0); + + /* See if this libcall is one of the hand coded ones. */ + + for (p = hand_list; *p && strcmp (*p, fname) != 0; p++) + ; + + if (*p) + regpass = 4; + } + + if (regpass) + { + int size; + + if (mode == BLKmode) + size = int_size_in_bytes (type); + else + size = GET_MODE_SIZE (mode); + + if (size + cum->nbytes > regpass * UNITS_PER_WORD) + { + result = 0; + } + else + { + switch (cum->nbytes / UNITS_PER_WORD) + { + case 0: + result = gen_rtx (REG, mode, 0); + break; + case 1: + result = gen_rtx (REG, mode, 1); + break; + case 2: + result = gen_rtx (REG, mode, 2); + break; + case 3: + result = gen_rtx (REG, mode, 3); + break; + default: + result = 0; + } + } + } + + return result; +} + +/* Return the cost of the rtx R with code CODE. */ + +int +const_costs (r, c) + rtx r; + enum rtx_code c; +{ + switch (c) + { + case CONST_INT: + switch (INTVAL (r)) + { + case 0: + case 1: + case 2: + case -1: + case -2: + return 0; + case 4: + case -4: + if (TARGET_H8300H || TARGET_H8300S) + return 0; + else + return 1; + default: + return 1; + } + + case CONST: + case LABEL_REF: + case SYMBOL_REF: + return 3; + + case CONST_DOUBLE: + return 20; + + default: + return 4; + } +} + +/* Documentation for the machine specific operand escapes: + + 'A' print rn in h8/300 mode, erN in H8/300H mode + 'C' print (operand - 2). + 'E' like s but negative. + 'F' like t but negative. + 'G' constant just the negative + 'M' turn a 'M' constant into its negative mod 2. + 'P' if operand is incing/decing sp, print .w, otherwise .b. + 'R' print operand as a byte:8 address if appropriate, else fall back to + 'X' handling. + 'S' print operand as a long word + 'T' print operand as a word + 'U' if operand is incing/decing sp, print l, otherwise nothing. + 'V' find the set bit, and print its number. + 'W' find the clear bit, and print its number. + 'X' print operand as a byte + 'Y' print either l or h depending on whether last 'Z' operand < 8 or >= 8. + If this operand isn't a register, fall back to 'R' handling. + 'Z' print int & 7. + 'b' print the bit opcode + 'c' print the ibit opcode + 'd' bcc if EQ, bcs if NE + 'e' first word of 32 bit value - if reg, then least reg. if mem + then least. if const then most sig word + 'f' second word of 32 bit value - if reg, then biggest reg. if mem + then +2. if const then least sig word + 'g' bcs if EQ, bcc if NE + 'j' print operand as condition code. + 'k' print operand as reverse condition code. + 's' print as low byte of 16 bit value + 't' print as high byte of 16 bit value + 'w' print as low byte of 32 bit value + 'x' print as 2nd byte of 32 bit value + 'y' print as 3rd byte of 32 bit value + 'z' print as msb of 32 bit value +*/ + +/* Return assembly language string which identifies a comparison type. */ + +static char * +cond_string (code) + enum rtx_code code; +{ + switch (code) + { + case NE: + return "ne"; + case EQ: + return "eq"; + case GE: + return "ge"; + case GT: + return "gt"; + case LE: + return "le"; + case LT: + return "lt"; + case GEU: + return "hs"; + case GTU: + return "hi"; + case LEU: + return "ls"; + case LTU: + return "lo"; + default: + abort (); + } +} + +/* Print operand X using operand code CODE to assembly language output file + FILE. */ + +void +print_operand (file, x, code) + FILE *file; + rtx x; + int code; +{ + /* This is used for communication between the 'P' and 'U' codes. */ + static char *last_p; + + /* This is used for communication between codes V,W,Z and Y. */ + static int bitint; + + switch (code) + { + case 'A': + if (GET_CODE (x) == REG) + fprintf (file, "%s", h8_reg_names[REGNO (x)]); + else + goto def; + break; + case 'C': + fprintf (file, "#%d", INTVAL (x) - 2); + break; + case 'E': + switch (GET_CODE (x)) + { + case REG: + fprintf (file, "%sl", names_big[REGNO (x)]); + break; + case CONST_INT: + fprintf (file, "#%d", (-INTVAL (x)) & 0xff); + break; + default: + abort (); + } + break; + case 'F': + switch (GET_CODE (x)) + { + case REG: + fprintf (file, "%sh", names_big[REGNO (x)]); + break; + case CONST_INT: + fprintf (file, "#%d", ((-INTVAL (x)) & 0xff00) >> 8); + break; + default: + abort (); + } + break; + case 'G': + if (GET_CODE (x) != CONST_INT) + abort (); + fprintf (file, "#%d", 0xff & (-INTVAL (x))); + break; + case 'M': + /* For 3/-3 and 4/-4, the other 2 is handled separately. */ + switch (INTVAL (x)) + { + case 2: + case 4: + case -2: + case -4: + fprintf (file, "#2"); + break; + case 1: + case 3: + case -1: + case -3: + fprintf (file, "#1"); + break; + default: + abort (); + } + break; + case 'P': + if (REGNO (XEXP (XEXP (x, 0), 0)) == STACK_POINTER_REGNUM) + { + last_p = ""; + fprintf (file, ".w"); + } + else + { + last_p = "l"; + fprintf (file, ".b"); + } + break; + case 'S': + if (GET_CODE (x) == REG) + fprintf (file, "%s", names_extended[REGNO (x)]); + else + goto def; + break; + case 'T': + if (GET_CODE (x) == REG) + fprintf (file, "%s", names_big[REGNO (x)]); + else + goto def; + break; + case 'U': + fprintf (file, "%s%s", names_big[REGNO (x)], last_p); + break; + case 'V': + bitint = exact_log2 (INTVAL (x)); + if (bitint == -1) + abort (); + fprintf (file, "#%d", bitint & 7); + break; + case 'W': + bitint = exact_log2 ((~INTVAL (x)) & 0xff); + if (bitint == -1) + abort (); + fprintf (file, "#%d", bitint & 7); + break; + case 'R': + case 'X': + if (GET_CODE (x) == REG) + fprintf (file, "%s", byte_reg (x, 0)); + else + goto def; + break; + case 'Y': + if (bitint == -1) + abort (); + if (GET_CODE (x) == REG) + fprintf (file, "%s%c", names_big[REGNO (x)], bitint > 7 ? 'h' : 'l'); + else + print_operand (file, x, 'R'); + bitint = -1; + break; + case 'Z': + bitint = INTVAL (x); + fprintf (file, "#%d", bitint & 7); + break; + case 'b': + switch (GET_CODE (x)) + { + case IOR: + fprintf (file, "bor"); + break; + case XOR: + fprintf (file, "bxor"); + break; + case AND: + fprintf (file, "band"); + break; + } + break; + case 'c': + switch (GET_CODE (x)) + { + case IOR: + fprintf (file, "bior"); + break; + case XOR: + fprintf (file, "bixor"); + break; + case AND: + fprintf (file, "biand"); + break; + } + break; + case 'd': + switch (GET_CODE (x)) + { + case EQ: + fprintf (file, "bcc"); + break; + case NE: + fprintf (file, "bcs"); + break; + default: + abort (); + } + break; + case 'e': + switch (GET_CODE (x)) + { + case REG: + if (TARGET_H8300) + fprintf (file, "%s", names_big[REGNO (x)]); + else + fprintf (file, "%s", names_upper_extended[REGNO (x)]); + break; + case MEM: + x = adj_offsettable_operand (x, 0); + print_operand (file, x, 0); + break; + case CONST_INT: + fprintf (file, "#%d", ((INTVAL (x) >> 16) & 0xffff)); + break; + case CONST_DOUBLE: + { + long val; + REAL_VALUE_TYPE rv; + REAL_VALUE_FROM_CONST_DOUBLE (rv, x); + REAL_VALUE_TO_TARGET_SINGLE (rv, val); + fprintf (file, "#%d", ((val >> 16) & 0xffff)); + break; + } + default: + abort (); + break; + } + break; + case 'f': + switch (GET_CODE (x)) + { + case REG: + if (TARGET_H8300) + fprintf (file, "%s", names_big[REGNO (x) + 1]); + else + fprintf (file, "%s", names_big[REGNO (x)]); + break; + case MEM: + x = adj_offsettable_operand (x, 2); + print_operand (file, x, 0); + break; + case CONST_INT: + fprintf (file, "#%d", INTVAL (x) & 0xffff); + break; + case CONST_DOUBLE: + { + long val; + REAL_VALUE_TYPE rv; + REAL_VALUE_FROM_CONST_DOUBLE (rv, x); + REAL_VALUE_TO_TARGET_SINGLE (rv, val); + fprintf (file, "#%d", (val & 0xffff)); + break; + } + default: + abort (); + } + break; + case 'g': + switch (GET_CODE (x)) + { + case NE: + fprintf (file, "bcc"); + break; + case EQ: + fprintf (file, "bcs"); + break; + default: + abort (); + } + break; + case 'j': + asm_fprintf (file, cond_string (GET_CODE (x))); + break; + case 'k': + asm_fprintf (file, cond_string (reverse_condition (GET_CODE (x)))); + break; + case 's': + if (GET_CODE (x) == CONST_INT) + fprintf (file, "#%d", (INTVAL (x)) & 0xff); + else + fprintf (file, "%s", byte_reg (x, 0)); + break; + case 't': + if (GET_CODE (x) == CONST_INT) + fprintf (file, "#%d", (INTVAL (x) >> 8) & 0xff); + else + fprintf (file, "%s", byte_reg (x, 1)); + break; + case 'u': + if (GET_CODE (x) != CONST_INT) + abort (); + fprintf (file, "%d", INTVAL (x)); + break; + case 'w': + if (GET_CODE (x) == CONST_INT) + fprintf (file, "#%d", INTVAL (x) & 0xff); + else + fprintf (file, "%s", + byte_reg (x, TARGET_H8300 ? 2 : 0)); + break; + case 'x': + if (GET_CODE (x) == CONST_INT) + fprintf (file, "#%d", (INTVAL (x) >> 8) & 0xff); + else + fprintf (file, "%s", + byte_reg (x, TARGET_H8300 ? 3 : 1)); + break; + case 'y': + if (GET_CODE (x) == CONST_INT) + fprintf (file, "#%d", (INTVAL (x) >> 16) & 0xff); + else + fprintf (file, "%s", byte_reg (x, 0)); + break; + case 'z': + if (GET_CODE (x) == CONST_INT) + fprintf (file, "#%d", (INTVAL (x) >> 24) & 0xff); + else + fprintf (file, "%s", byte_reg (x, 1)); + break; + + default: + def: + switch (GET_CODE (x)) + { + case REG: + switch (GET_MODE (x)) + { + case QImode: +#if 0 /* Is it asm ("mov.b %0,r2l", ...) */ + fprintf (file, "%s", byte_reg (x, 0)); +#else /* ... or is it asm ("mov.b %0l,r2l", ...) */ + fprintf (file, "%s", names_big[REGNO (x)]); +#endif + break; + case HImode: + fprintf (file, "%s", names_big[REGNO (x)]); + break; + case SImode: + case SFmode: + fprintf (file, "%s", names_extended[REGNO (x)]); + break; + default: + abort (); + } + break; + + case MEM: + fprintf (file, "@"); + output_address (XEXP (x, 0)); + + /* If this is an 'R' operand (reference into the 8-bit area), + then specify a symbolic address as "foo:8". */ + if (code == 'R' + && GET_CODE (XEXP (x, 0)) == SYMBOL_REF + && SYMBOL_REF_FLAG (XEXP (x, 0))) + fprintf (file, ":8"); + if (GET_CODE (XEXP (x, 0)) == SYMBOL_REF + && TINY_DATA_NAME_P (XSTR (XEXP (x, 0), 0))) + fprintf (file, ":16"); + break; + + case CONST_INT: + case SYMBOL_REF: + case CONST: + case LABEL_REF: + fprintf (file, "#"); + print_operand_address (file, x); + break; + case CONST_DOUBLE: + { + long val; + REAL_VALUE_TYPE rv; + REAL_VALUE_FROM_CONST_DOUBLE (rv, x); + REAL_VALUE_TO_TARGET_SINGLE (rv, val); + fprintf (file, "#%d", val); + break; + } + } + } +} + +/* Output assembly language output for the address ADDR to FILE. */ + +void +print_operand_address (file, addr) + FILE *file; + rtx addr; +{ + switch (GET_CODE (addr)) + { + case REG: + fprintf (file, "%s", h8_reg_names[REGNO (addr)]); + break; + + case PRE_DEC: + fprintf (file, "-%s", h8_reg_names[REGNO (XEXP (addr, 0))]); + break; + + case POST_INC: + fprintf (file, "%s+", h8_reg_names[REGNO (XEXP (addr, 0))]); + break; + + case PLUS: + fprintf (file, "("); + if (GET_CODE (XEXP (addr, 0)) == REG) + { + /* reg,foo */ + print_operand_address (file, XEXP (addr, 1)); + fprintf (file, ","); + print_operand_address (file, XEXP (addr, 0)); + } + else + { + /* foo+k */ + print_operand_address (file, XEXP (addr, 0)); + fprintf (file, "+"); + print_operand_address (file, XEXP (addr, 1)); + } + fprintf (file, ")"); + break; + + case CONST_INT: + { + /* Since the h8/300 only has 16 bit pointers, negative values are also + those >= 32768. This happens for example with pointer minus a + constant. We don't want to turn (char *p - 2) into + (char *p + 65534) because loop unrolling can build upon this + (IE: char *p + 131068). */ + int n = INTVAL (addr); + if (TARGET_H8300) + n = (int) (short) n; + if (n < 0) + /* ??? Why the special case for -ve values? */ + fprintf (file, "-%d", -n); + else + fprintf (file, "%d", n); + break; + } + + default: + output_addr_const (file, addr); + break; + } +} + +/* Output all insn addresses and their sizes into the assembly language + output file. This is helpful for debugging whether the length attributes + in the md file are correct. This is not meant to be a user selectable + option. */ + +void +final_prescan_insn (insn, operand, num_operands) + rtx insn, *operand; + int num_operands; +{ + /* This holds the last insn address. */ + static int last_insn_address = 0; + + int uid = INSN_UID (insn); + + if (TARGET_RTL_DUMP) + { + fprintf (asm_out_file, "\n****************"); + print_rtl (asm_out_file, PATTERN (insn)); + fprintf (asm_out_file, "\n"); + } + + if (TARGET_ADDRESSES) + { + fprintf (asm_out_file, "; 0x%x %d\n", insn_addresses[uid], + insn_addresses[uid] - last_insn_address); + last_insn_address = insn_addresses[uid]; + } +} + +/* Prepare for an SI sized move. */ + +int +do_movsi (operands) + rtx operands[]; +{ + rtx src = operands[1]; + rtx dst = operands[0]; + if (!reload_in_progress && !reload_completed) + { + if (!register_operand (dst, GET_MODE (dst))) + { + rtx tmp = gen_reg_rtx (GET_MODE (dst)); + emit_move_insn (tmp, src); + operands[1] = tmp; + } + } + return 0; +} + +/* Function for INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET). + Define the offset between two registers, one to be eliminated, and the other + its replacement, at the start of a routine. */ + +int +initial_offset (from, to) +{ + int offset = 0; + + if (from == ARG_POINTER_REGNUM && to == FRAME_POINTER_REGNUM) + offset = UNITS_PER_WORD + frame_pointer_needed * UNITS_PER_WORD; + else + { + int regno; + + for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) + if (WORD_REG_USED (regno)) + offset += UNITS_PER_WORD; + + /* See the comments for get_frame_size. We need to round it up to + STACK_BOUNDARY. */ + + offset += ((get_frame_size () + STACK_BOUNDARY / BITS_PER_UNIT - 1) + & ~(STACK_BOUNDARY / BITS_PER_UNIT - 1)); + + if (from == ARG_POINTER_REGNUM && to == STACK_POINTER_REGNUM) + offset += UNITS_PER_WORD; /* Skip saved PC */ + } + return offset; +} + +/* Update the condition code from the insn. */ + +int +notice_update_cc (body, insn) + rtx body; + rtx insn; +{ + switch (get_attr_cc (insn)) + { + case CC_NONE: + /* Insn does not affect CC at all. */ + break; + + case CC_NONE_0HIT: + /* Insn does not change CC, but the 0'th operand has been changed. */ + if (cc_status.value1 != 0 + && reg_overlap_mentioned_p (recog_operand[0], cc_status.value1)) + cc_status.value1 = 0; + break; + + case CC_SET_ZN: + /* Insn sets the Z,N flags of CC to recog_operand[0]. + The V flag is unusable. The C flag may or may not be known but + that's ok because alter_cond will change tests to use EQ/NE. */ + CC_STATUS_INIT; + cc_status.flags |= CC_OVERFLOW_UNUSABLE | CC_NO_CARRY; + cc_status.value1 = recog_operand[0]; + break; + + case CC_SET_ZNV: + /* Insn sets the Z,N,V flags of CC to recog_operand[0]. + The C flag may or may not be known but that's ok because + alter_cond will change tests to use EQ/NE. */ + CC_STATUS_INIT; + cc_status.flags |= CC_NO_CARRY; + cc_status.value1 = recog_operand[0]; + break; + + case CC_COMPARE: + /* The insn is a compare instruction. */ + CC_STATUS_INIT; + cc_status.value1 = SET_SRC (body); + break; + + case CC_CLOBBER: + /* Insn doesn't leave CC in a usable state. */ + CC_STATUS_INIT; + break; + } +} + +/* Recognize valid operators for bit instructions */ + +int +bit_operator (x, mode) + rtx x; + enum machine_mode mode; +{ + enum rtx_code code = GET_CODE (x); + + return (code == XOR + || code == AND + || code == IOR); +} + +/* Shifts. + + We devote a fair bit of code to getting efficient shifts since we can only + shift one bit at a time on the H8/300 and H8/300H and only one or two + bits at a time on the H8/S. + + The basic shift methods: + + * loop shifts -- emit a loop using one (or two on H8/S) bit shifts; + this is the default. SHIFT_LOOP + + * inlined shifts -- emit straight line code for the shift; this is + used when a straight line shift is about the same size or smaller + than a loop. We allow the inline version to be slightly longer in + some cases as it saves a register. SHIFT_INLINE + + * rotate + and -- rotate the value the opposite direction, then + mask off the values we don't need. This is used when only a few + of the bits in the original value will survive in the shifted value. + Again, this is used when it's about the same size or smaller than + a loop. We allow this version to be slightly longer as it is usually + much faster than a loop. SHIFT_ROT_AND + + * swap (+ shifts) -- often it's possible to swap bytes/words to + simulate a shift by 8/16. Once swapped a few inline shifts can be + added if the shift count is slightly more than 8 or 16. This is used + when it's about the same size or smaller than a loop. We allow this + version to be slightly longer as it is usually much faster than a loop. + SHIFT_SPECIAL + + * There other oddballs. Not worth explaining. SHIFT_SPECIAL + + + Here are some thoughts on what the absolutely positively best code is. + "Best" here means some rational trade-off between code size and speed, + where speed is more preferred but not at the expense of generating 20 insns. + + A trailing '*' after the shift count indicates the "best" mode isn't + implemented. + + H8/300 QImode shifts + 1-4 - do them inline + 5-6 - ASHIFT | LSHIFTRT: rotate, mask off other bits + ASHIFTRT: loop + 7 - ASHIFT | LSHIFTRT: rotate, mask off other bits + ASHIFTRT: shll, subx (propagate carry bit to all bits) + + H8/300 HImode shifts + 1-4 - do them inline + 5-6 - loop + 7 - shift 2nd half other way into carry. + copy 1st half into 2nd half + rotate 2nd half other way with carry + rotate 1st half other way (no carry) + mask off bits in 1st half (ASHIFT | LSHIFTRT). + sign extend 1st half (ASHIFTRT) + 8 - move byte, zero (ASHIFT | LSHIFTRT) or sign extend other (ASHIFTRT) + 9-12 - do shift by 8, inline remaining shifts + 13-14* - ASHIFT | LSHIFTRT: rotate 3/2, mask, move byte, set other byte to 0 + - ASHIFTRT: loop + 15 - ASHIFT | LSHIFTRT: rotate 1, mask, move byte, set other byte to 0 + - ASHIFTRT: shll, subx, set other byte + + H8/300 SImode shifts + 1-2 - do them inline + 3-6 - loop + 7* - shift other way once, move bytes into place, + move carry into place (possibly with sign extension) + 8 - move bytes into place, zero or sign extend other + 9-14 - loop + 15* - shift other way once, move word into place, move carry into place + 16 - move word, zero or sign extend other + 17-23 - loop + 24* - move bytes into place, zero or sign extend other + 25-27 - loop + 28-30* - ASHIFT | LSHIFTRT: rotate top byte, mask, move byte into place, + zero others + ASHIFTRT: loop + 31 - ASHIFT | LSHIFTRT: rotate top byte, mask, move byte into place, + zero others + ASHIFTRT: shll top byte, subx, copy to other bytes + + H8/300H QImode shifts (same as H8/300 QImode shifts) + 1-4 - do them inline + 5-6 - ASHIFT | LSHIFTRT: rotate, mask off other bits + ASHIFTRT: loop + 7 - ASHIFT | LSHIFTRT: rotate, mask off other bits + ASHIFTRT: shll, subx (propagate carry bit to all bits) + + + H8/300H HImode shifts + 1-4 - do them inline + 5-6 - loop + 7 - shift 2nd half other way into carry. + copy 1st half into 2nd half + rotate entire word other way using carry + mask off remaining bits (ASHIFT | LSHIFTRT) + sign extend remaining bits (ASHIFTRT) + 8 - move byte, zero (ASHIFT | LSHIFTRT) or sign extend other (ASHIFTRT) + 9-12 - do shift by 8, inline remaining shifts + 13-14 - ASHIFT | LSHIFTRT: rotate 3/2, mask, move byte, set other byte to 0 + - ASHIFTRT: loop + 15 - ASHIFT | LSHIFTRT: rotate 1, mask, move byte, set other byte to 0 + - ASHIFTRT: shll, subx, set other byte + + H8/300H SImode shifts + (These are complicated by the fact that we don't have byte level access to + the top word.) + A word is: bytes 3,2,1,0 (msb -> lsb), word 1,0 (msw -> lsw) + 1-4 - do them inline + 5-14 - loop + 15* - shift other way once, move word into place, move carry into place + (with sign extension for ASHIFTRT) + 16 - move word into place, zero or sign extend other + 17-20 - do 16bit shift, then inline remaining shifts + 20-23 - loop + 24* - ASHIFT: move byte 0(msb) to byte 1, zero byte 0, + move word 0 to word 1, zero word 0 + LSHIFTRT: move word 1 to word 0, move byte 1 to byte 0, + zero word 1, zero byte 1 + ASHIFTRT: move word 1 to word 0, move byte 1 to byte 0, + sign extend byte 0, sign extend word 0 + 25-27* - either loop, or + do 24 bit shift, inline rest + 28-30 - ASHIFT: rotate 4/3/2, mask + LSHIFTRT: rotate 4/3/2, mask + ASHIFTRT: loop + 31 - shll, subx byte 0, sign extend byte 0, sign extend word 0 + + H8/S QImode shifts + 1-6 - do them inline + 7 - ASHIFT | LSHIFTRT: rotate, mask off other bits + ASHIFTRT: shll, subx (propagate carry bit to all bits) + + H8/S HImode shifts + 1-7 - do them inline + 8 - move byte, zero (ASHIFT | LSHIFTRT) or sign extend other (ASHIFTRT) + 9-12 - do shift by 8, inline remaining shifts + 13-14 - ASHIFT | LSHIFTRT: rotate 3/2, mask, move byte, set other byte to 0 + - ASHIFTRT: loop + 15 - ASHIFT | LSHIFTRT: rotate 1, mask, move byte, set other byte to 0 + - ASHIFTRT: shll, subx, set other byte + + H8/S SImode shifts + (These are complicated by the fact that we don't have byte level access to + the top word.) + A word is: bytes 3,2,1,0 (msb -> lsb), word 1,0 (msw -> lsw) + 1-10 - do them inline + 11-14 - loop + 15* - shift other way once, move word into place, move carry into place + (with sign extension for ASHIFTRT) + 16 - move word into place, zero or sign extend other + 17-20 - do 16bit shift, then inline remaining shifts + 20-23 - loop + 24* - ASHIFT: move byte 0(msb) to byte 1, zero byte 0, + move word 0 to word 1, zero word 0 + LSHIFTRT: move word 1 to word 0, move byte 1 to byte 0, + zero word 1, zero byte 1 + ASHIFTRT: move word 1 to word 0, move byte 1 to byte 0, + sign extend byte 0, sign extend word 0 + 25-27* - either loop, or + do 24 bit shift, inline rest + 28-30 - ASHIFT: rotate 4/3/2, mask + LSHIFTRT: rotate 4/3/2, mask + ASHIFTRT: loop + 31 - shll, subx byte 0, sign extend byte 0, sign extend word 0 + + Panic!!! */ + +int +nshift_operator (x, mode) + rtx x; + enum machine_mode mode; +{ + switch (GET_CODE (x)) + { + case ASHIFTRT: + case LSHIFTRT: + case ASHIFT: + return 1; + + default: + return 0; + } +} + +/* Called from the .md file to emit code to do shifts. + Returns a boolean indicating success + (currently this is always TRUE). */ + +int +expand_a_shift (mode, code, operands) + enum machine_mode mode; + int code; + rtx operands[]; +{ + emit_move_insn (operands[0], operands[1]); + + /* need a loop to get all the bits we want - we generate the + code at emit time, but need to allocate a scratch reg now */ + + emit_insn (gen_rtx + (PARALLEL, VOIDmode, + gen_rtvec (2, + gen_rtx (SET, VOIDmode, operands[0], + gen_rtx (code, mode, operands[0], operands[2])), + gen_rtx (CLOBBER, VOIDmode, gen_rtx (SCRATCH, QImode, 0))))); + + return 1; +} + +/* Shift algorithm determination. + + There are various ways of doing a shift: + SHIFT_INLINE: If the amount is small enough, just generate as many one-bit + shifts as we need. + SHIFT_ROT_AND: If the amount is large but close to either end, rotate the + necessary bits into position and then set the rest to zero. + SHIFT_SPECIAL: Hand crafted assembler. + SHIFT_LOOP: If the above methods fail, just loop. */ + +enum shift_alg +{ + SHIFT_INLINE, + SHIFT_ROT_AND, + SHIFT_SPECIAL, + SHIFT_LOOP, + SHIFT_MAX +}; + +/* Symbols of the various shifts which can be used as indices. */ + +enum shift_type + { + SHIFT_ASHIFT, SHIFT_LSHIFTRT, SHIFT_ASHIFTRT + }; + +/* Symbols of the various modes which can be used as indices. */ + +enum shift_mode + { + QIshift, HIshift, SIshift + }; + +/* For single bit shift insns, record assembler and what bits of the + condition code are valid afterwards (represented as various CC_FOO + bits, 0 means CC isn't left in a usable state). */ + +struct shift_insn +{ + char *assembler; + int cc_valid; +}; + +/* Assembler instruction shift table. + + These tables are used to look up the basic shifts. + They are indexed by cpu, shift_type, and mode. +*/ + +static const struct shift_insn shift_one[2][3][3] = +{ +/* H8/300 */ + { +/* SHIFT_ASHIFT */ + { + { "shll\t%X0", CC_NO_CARRY }, + { "add.w\t%T0,%T0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, + { "add.w\t%f0,%f0\n\taddx\t%y0,%y0\n\taddx\t%z0,%z0", 0 } + }, +/* SHIFT_LSHIFTRT */ + { + { "shlr\t%X0", CC_NO_CARRY }, + { "shlr\t%t0\n\trotxr\t%s0", 0 }, + { "shlr\t%z0\n\trotxr\t%y0\n\trotxr\t%x0\n\trotxr\t%w0", 0 } + }, +/* SHIFT_ASHIFTRT */ + { + { "shar\t%X0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, + { "shar\t%t0\n\trotxr\t%s0", 0 }, + { "shar\t%z0\n\trotxr\t%y0\n\trotxr\t%x0\n\trotxr\t%w0", 0 } + } + }, +/* H8/300H */ + { +/* SHIFT_ASHIFT */ + { + { "shll.b\t%X0", CC_NO_CARRY }, + { "shll.w\t%T0", CC_NO_CARRY }, + { "shll.l\t%S0", CC_NO_CARRY } + }, +/* SHIFT_LSHIFTRT */ + { + { "shlr.b\t%X0", CC_NO_CARRY }, + { "shlr.w\t%T0", CC_NO_CARRY }, + { "shlr.l\t%S0", CC_NO_CARRY } + }, +/* SHIFT_ASHIFTRT */ + { + { "shar.b\t%X0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, + { "shar.w\t%T0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, + { "shar.l\t%S0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY } + } + } +}; + +static const struct shift_insn shift_two[3][3] = +{ +/* SHIFT_ASHIFT */ + { + { "shll.b\t#2,%X0", CC_NO_CARRY }, + { "shll.w\t#2,%T0", CC_NO_CARRY }, + { "shll.l\t#2,%S0", CC_NO_CARRY } + }, +/* SHIFT_LSHIFTRT */ + { + { "shlr.b\t#2,%X0", CC_NO_CARRY }, + { "shlr.w\t#2,%T0", CC_NO_CARRY }, + { "shlr.l\t#2,%S0", CC_NO_CARRY } + }, +/* SHIFT_ASHIFTRT */ + { + { "shar.b\t#2,%X0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, + { "shar.w\t#2,%T0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, + { "shar.l\t#2,%S0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY } + } +}; + +/* Rotates are organized by which shift they'll be used in implementing. + There's no need to record whether the cc is valid afterwards because + it is the AND insn that will decide this. */ + +static const char *const rotate_one[2][3][3] = +{ +/* H8/300 */ + { +/* SHIFT_ASHIFT */ + { + "rotr\t%X0", + "shlr\t%t0\n\trotxr\t%s0\n\tbst\t#7,%t0", + 0 + }, +/* SHIFT_LSHIFTRT */ + { + "rotl\t%X0", + "shll\t%s0\n\trotxl\t%t0\n\tbst\t#0,%s0", + 0 + }, +/* SHIFT_ASHIFTRT */ + { + "rotl\t%X0", + "shll\t%s0\n\trotxl\t%t0\n\tbst\t#0,%s0", + 0 + } + }, +/* H8/300H */ + { +/* SHIFT_ASHIFT */ + { + "rotr.b\t%X0", + "rotr.w\t%T0", + "rotr.l\t%S0" + }, +/* SHIFT_LSHIFTRT */ + { + "rotl.b\t%X0", + "rotl.w\t%T0", + "rotl.l\t%S0" + }, +/* SHIFT_ASHIFTRT */ + { + "rotl.b\t%X0", + "rotl.w\t%T0", + "rotl.l\t%S0" + } + } +}; + +static const char *const rotate_two[3][3] = +{ +/* SHIFT_ASHIFT */ + { + "rotr.b\t#2,%X0", + "rotr.w\t#2,%T0", + "rotr.l\t#2,%S0" + }, +/* SHIFT_LSHIFTRT */ + { + "rotl.b\t#2,%X0", + "rotl.w\t#2,%T0", + "rotl.l\t#2,%S0" + }, +/* SHIFT_ASHIFTRT */ + { + "rotl.b\t#2,%X0", + "rotl.w\t#2,%T0", + "rotl.l\t#2,%S0" + } +}; + +/* Given CPU, MODE, SHIFT_TYPE, and shift count COUNT, determine the best + algorithm for doing the shift. The assembler code is stored in ASSEMBLER. + We don't achieve maximum efficiency in all cases, but the hooks are here + to do so. + + For now we just use lots of switch statements. Since we don't even come + close to supporting all the cases, this is simplest. If this function ever + gets too big, perhaps resort to a more table based lookup. Of course, + at this point you may just wish to do it all in rtl. + + WARNING: The constraints on insns shiftbyn_QI/HI/SI assume shifts of + 1,2,3,4 will be inlined (1,2 for SI). */ + +static enum shift_alg +get_shift_alg (cpu, shift_type, mode, count, assembler_p, + assembler2_p, cc_valid_p) + enum attr_cpu cpu; + enum shift_type shift_type; + enum machine_mode mode; + int count; + const char **assembler_p; + const char **assembler2_p; + int *cc_valid_p; +{ + /* The default is to loop. */ + enum shift_alg alg = SHIFT_LOOP; + enum shift_mode shift_mode; + + /* We don't handle negative shifts or shifts greater than the word size, + they should have been handled already. */ + + if (count < 0 || count > GET_MODE_BITSIZE (mode)) + abort (); + + switch (mode) + { + case QImode: + shift_mode = QIshift; + break; + case HImode: + shift_mode = HIshift; + break; + case SImode: + shift_mode = SIshift; + break; + default: + abort (); + } + + /* Assume either SHIFT_LOOP or SHIFT_INLINE. + It is up to the caller to know that looping clobbers cc. */ + *assembler_p = shift_one[cpu][shift_type][shift_mode].assembler; + if (TARGET_H8300S) + *assembler2_p = shift_two[shift_type][shift_mode].assembler; + else + *assembler2_p = NULL; + *cc_valid_p = shift_one[cpu][shift_type][shift_mode].cc_valid; + + /* Now look for cases we want to optimize. */ + + switch (shift_mode) + { + case QIshift: + if (count <= 4) + return SHIFT_INLINE; + else + { + /* Shift by 5/6 are only 3 insns on the H8/S, so it's just as + fast as SHIFT_ROT_AND, plus CC is valid. */ + if (TARGET_H8300S && count <= 6) + return SHIFT_INLINE; + + /* For ASHIFTRT by 7 bits, the sign bit is simply replicated + through the entire value. */ + if (shift_type == SHIFT_ASHIFTRT && count == 7) + { + *assembler_p = "shll\t%X0\n\tsubx\t%X0,%X0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + + /* Other ASHIFTRTs are too much of a pain. */ + if (shift_type == SHIFT_ASHIFTRT) + return SHIFT_LOOP; + + /* Other shifts by 5, 6, or 7 bits use SHIFT_ROT_AND. */ + *assembler_p = rotate_one[cpu][shift_type][shift_mode]; + if (TARGET_H8300S) + *assembler2_p = rotate_two[shift_type][shift_mode]; + *cc_valid_p = 0; + return SHIFT_ROT_AND; + } + + case HIshift: + if (count <= 4) + return SHIFT_INLINE; + else if (TARGET_H8300S && count <= 7) + return SHIFT_INLINE; + else if (count == 7) + { + if (shift_type == SHIFT_ASHIFT && TARGET_H8300) + { + *assembler_p = "shar.b\t%t0\n\tmov.b\t%s0,%t0\n\trotxr.b\t%t0\n\trotr.b\t%s0\n\tand.b\t#0x80,%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + + if (shift_type == SHIFT_ASHIFT && TARGET_H8300H) + { + *assembler_p = "shar.b\t%t0\n\tmov.b\t%s0,%t0\n\trotxr.w\t%T0\n\tand.b\t#0x80,%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + + if (shift_type == SHIFT_LSHIFTRT && TARGET_H8300) + { + *assembler_p = "shal.b\t%s0\n\tmov.b\t%t0,%s0\n\trotxl.b\t%s0\n\trotl.b\t%t0\n\tand.b\t#0x01,%t0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + + if (shift_type == SHIFT_LSHIFTRT && TARGET_H8300H) + { + *assembler_p = "shal.b\t%s0\n\tmov.b\t%t0,%s0\n\trotxl.w\t%T0\n\tand.b\t#0x01,%t0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + + if (shift_type == SHIFT_ASHIFTRT) + { + *assembler_p = "shal.b\t%s0\n\tmov.b\t%t0,%s0\n\trotxl.b\t%s0\n\tsubx\t%t0,%t0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 8) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + *assembler_p = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + *assembler_p = "mov.b\t%t0,%s0\n\tsub.b\t%t0,%t0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + if (TARGET_H8300) + *assembler_p = "mov.b\t%t0,%s0\n\tshll\t%t0\n\tsubx\t%t0,%t0\t"; + else + *assembler_p = "mov.b\t%t0,%s0\n\texts.w\t%T0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 9) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + *assembler_p = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tshal.b\t%t0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + *assembler_p = "mov.b\t%t0,%s0\n\tsub.b\t%t0,%t0\n\tshlr.b\t%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + if (TARGET_H8300) + *assembler_p = "mov.b\t%t0,%s0\n\tbld\t#7,%s0\n\tsubx\t%t0,%t0\n\tshar.b\t%s0"; + else + *assembler_p = "mov.b\t%t0,%s0\n\texts.w\t%T0\n\tshar.b\t%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 10) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + if (TARGET_H8300S) + *assembler_p = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tshal.b\t#2,%t0\n\t"; + else + *assembler_p = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tshal.b\t%t0\n\tshal.b\t%t0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + if (TARGET_H8300S) + *assembler_p = "mov.b\t%t0,%s0\n\tsub.b\t%t0,%t0\n\tshlr.b\t#2,%s0"; + else + *assembler_p = "mov.b\t%t0,%s0\n\tsub.b\t%t0,%t0\n\tshlr.b\t%s0\n\tshlr.b\t%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + if (TARGET_H8300) + *assembler_p = "mov.b\t%t0,%s0\n\tbld\t#7,%s0\n\tsubx\t%t0,%t0\n\tshar.b\t%s0\n\tshar.b\t%s0"; + else if (TARGET_H8300H) + *assembler_p = "mov.b\t%t0,%s0\n\texts.w\t%T0\n\tshar.b\t%s0\n\tshar.b\t%s0"; + else if (TARGET_H8300S) + *assembler_p = "mov.b\t%t0,%s0\n\texts.w\t%T0\n\tshar.b\t#2,%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 11) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + if (TARGET_H8300S) + *assembler_p = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tshal.b\t#2,%t0\n\tshal.b\t%t0"; + else + *assembler_p = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tshal.b\t%t0\n\tshal.b\t%t0\n\tshal.b\t%t0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + if (TARGET_H8300S) + *assembler_p = "mov.b\t%t0,%s0\n\tsub.b\t%t0,%t0\n\tshlr.b\t#2,%s0\n\tshlr.b\t%s0"; + else + *assembler_p = "mov.b\t%t0,%s0\n\tsub.b\t%t0,%t0\n\tshlr.b\t%s0\n\tshlr.b\t%s0\n\tshlr.b\t%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + if (TARGET_H8300) + *assembler_p = "mov.b\t%t0,%s0\n\tbld\t#7,%s0\n\tsubx\t%t0,%t0\n\tshar.b\t%s0\n\tshar.b\t%s0\n\tshar.b\t%s0"; + else if (TARGET_H8300H) + *assembler_p = "mov.b\t%t0,%s0\n\texts.w\t%T0\n\tshar.b\t%s0\n\tshar.b\t%s0\n\tshar.b\t%s0"; + else if (TARGET_H8300S) + *assembler_p = "mov.b\t%t0,%s0\n\texts.w\t%T0\n\tshar.b\t#2,%s0\n\tshar.b\t%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 12) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + if (TARGET_H8300S) + *assembler_p = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tshal.b\t#2,%t0\n\tshal.b\t#2,%t0"; + else + *assembler_p = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tshal.b\t%t0\n\tshal.b\t%t0\n\tshal.b\t%t0\n\tshal.b\t%t0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + if (TARGET_H8300S) + *assembler_p = "mov.b\t%t0,%s0\n\tsub.b\t%t0,%t0\n\tshlr.b\t#2,%s0\n\tshlr.b\t#2,%s0"; + else + *assembler_p = "mov.b\t%t0,%s0\n\tsub.b\t%t0,%t0\n\tshlr.b\t%s0\n\tshlr.b\t%s0\n\tshlr.b\t%s0\n\tshlr.b\t%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + if (TARGET_H8300) + *assembler_p = "mov.b\t%t0,%s0\n\tbld\t#7,%s0\n\tsubx\t%t0,%t0\n\tshar.b\t%s0\n\tshar.b\t%s0\n\tshar.b\t%s0\n\tshar.b\t%s0"; + else if (TARGET_H8300H) + *assembler_p = "mov.b\t%t0,%s0\n\textw.w\t%T0\n\tshar.b\t%s0\n\tshar.b\t%s0\n\tshar.b\t%s0\n\tshar.b\t%s0"; + else if (TARGET_H8300S) + *assembler_p = "mov.b\t%t0,%s0\n\textw.w\t%T0\n\tshar.b\t#2,%s0\n\tshar.b\t#2,%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (!TARGET_H8300 && (count == 13 || count == 14) + || count == 15) + { + if (count == 15 && shift_type == SHIFT_ASHIFTRT) + { + *assembler_p = "shll\t%t0,%t0\n\tsubx\t%t0,%t0\n\tmov.b\t%t0,%s0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + else if (shift_type != SHIFT_ASHIFTRT) + { + *assembler_p = rotate_one[cpu][shift_type][shift_mode]; + if (TARGET_H8300S) + *assembler2_p = rotate_two[shift_type][shift_mode]; + else + *assembler2_p = NULL; + *cc_valid_p = 0; + return SHIFT_ROT_AND; + } + } + break; + + case SIshift: + if (count <= (TARGET_H8300 ? 2 : 4)) + return SHIFT_INLINE; + else if (TARGET_H8300S && count <= 10) + return SHIFT_INLINE; + else if (count == 8 && TARGET_H8300) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + *assembler_p = "mov.b\t%y0,%z0\n\tmov.b\t%x0,%y0\n\tmov.b\t%w0,%x0\n\tsub.b\t%w0,%w0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + *assembler_p = "mov.b\t%x0,%w0\n\tmov.b\t%y0,%x0\n\tmov.b\t%z0,%y0\n\tsub.b\t%z0,%z0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + *assembler_p = "mov.b\t%x0,%w0\n\tmov.b\t%y0,%x0\n\tmov.b\t%z0,%y0\n\tshll\t%z0\n\tsubx\t%z0,%z0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 8 && !TARGET_H8300) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + *assembler_p = "mov.w\t%e0,%f4\n\tmov.b\t%s4,%t4\n\tmov.b\t%t0,%s4\n\tmov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tmov.w\t%f4,%e0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + *assembler_p = "mov.w\t%e0,%f4\n\tmov.b\t%t0,%s0\n\tmov.b\t%s4,%t0\n\tmov.b\t%t4,%s4\n\textu.w\t%f4\n\tmov.w\t%f4,%e0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + *assembler_p = "mov.w\t%e0,%f4\n\tmov.b\t%t0,%s0\n\tmov.b\t%s4,%t0\n\tmov.b\t%t4,%s4\n\texts.w\t%f4\n\tmov.w\t%f4,%e0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 16) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + *assembler_p = "mov.w\t%f0,%e0\n\tsub.w\t%f0,%f0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + *assembler_p = "mov.w\t%e0,%f0\n\tsub.w\t%e0,%e0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + if (TARGET_H8300) + *assembler_p = "mov.w\t%e0,%f0\n\tshll\t%z0\n\tsubx\t%z0,%z0\n\tmov.b\t%z0,%y0"; + else + *assembler_p = "mov.w\t%e0,%f0\n\texts.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 17 && !TARGET_H8300) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + *assembler_p = "mov.w\t%f0,%e0\n\tsub.w\t%f0,%f0\n\tshll.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + *assembler_p = "mov.w\t%e0,%f0\n\tsub.w\t%e0,%e0\n\tshlr.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + *assembler_p = "mov.w\t%e0,%f0\n\texts.l\t%S0\n\tshar.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 18 && !TARGET_H8300) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + if (TARGET_H8300S) + *assembler_p = "mov.w\t%f0,%e0\n\tsub.w\t%f0,%f0\n\tshll.l\t#2,%S0"; + else + *assembler_p = "mov.w\t%f0,%e0\n\tsub.w\t%f0,%f0\n\tshll.l\t%S0\n\tshll.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + if (TARGET_H8300S) + *assembler_p = "mov.w\t%e0,%f0\n\tsub.w\t%e0,%e0\n\tshlr.l\t#2,%S0"; + else + *assembler_p = "mov.w\t%e0,%f0\n\tsub.w\t%e0,%e0\n\tshlr.l\t%S0\n\tshlr.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + if (TARGET_H8300S) + *assembler_p = "mov.w\t%e0,%f0\n\texts.l\t%S0\n\tshar.l\t#2,%S0"; + else + *assembler_p = "mov.w\t%e0,%f0\n\texts.l\t%S0\n\tshar.l\t%S0\n\tshar.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 19 && !TARGET_H8300) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + if (TARGET_H8300S) + *assembler_p = "mov.w\t%f0,%e0\n\tsub.w\t%f0,%f0\n\tshll.l\t#2,%S0\n\tshll.l\t%S0"; + else + *assembler_p = "mov.w\t%f0,%e0\n\tsub.w\t%f0,%f0\n\tshll.l\t%S0\n\tshll.l\t%S0\n\tshll.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + if (TARGET_H8300S) + *assembler_p = "mov.w\t%e0,%f0\n\tsub.w\t%e0,%e0\n\tshlr.l\t#2,%S0\n\tshlr.l\t%S0"; + else + *assembler_p = "mov.w\t%e0,%f0\n\tsub.w\t%e0,%e0\n\tshlr.l\t%S0\n\tshlr.l\t%S0\n\tshlr.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + if (TARGET_H8300S) + *assembler_p = "mov.w\t%e0,%f0\n\texts.l\t%S0\n\tshar.l\t#2,%S0\n\tshar.l\t%S0"; + else + *assembler_p = "mov.w\t%e0,%f0\n\texts.l\t%S0\n\tshar.l\t%S0\n\tshar.l\t%S0\n\tshar.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 20 && TARGET_H8300S) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + *assembler_p = "mov.w\t%f0,%e0\n\tsub.w\t%f0,%f0\n\tshll.l\t#2,%S0\n\tshll.l\t#2,%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + *assembler_p = "mov.w\t%e0,%f0\n\tsub.w\t%e0,%e0\n\tshlr.l\t#2,%S0\n\tshlr.l\t#2,%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + *assembler_p = "mov.w\t%e0,%f0\n\texts.l\t%S0\n\tshar.l\t#2,%S0\n\tshar.l\t#2,%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count == 24 && !TARGET_H8300) + { + switch (shift_type) + { + case SHIFT_ASHIFT: + *assembler_p = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tmov.w\t%f0,%e0\n\tsub.w\t%f0,%f0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_LSHIFTRT: + *assembler_p = "mov.w\t%e0,%f0\n\tmov.b\t%t0,%s0\n\textu.w\t%f0\n\textu.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + case SHIFT_ASHIFTRT: + *assembler_p = "mov.w\t%e0,%f0\n\tmov.b\t%t0,%s0\n\texts.w\t%f0\n\texts.l\t%S0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + } + else if (count >= 28 && count <= 30 && !TARGET_H8300) + { + if (shift_type == SHIFT_ASHIFTRT) + { + return SHIFT_LOOP; + } + else + { + *assembler_p = rotate_one[cpu][shift_type][shift_mode]; + if (TARGET_H8300S) + *assembler2_p = rotate_two[shift_type][shift_mode]; + else + *assembler2_p = NULL; + *cc_valid_p = 0; + return SHIFT_ROT_AND; + } + } + else if (count == 31) + { + if (shift_type == SHIFT_ASHIFTRT) + { + if (TARGET_H8300) + *assembler_p = "shll\t%z0\n\tsubx %w0,%w0\n\tmov.b\t%w0,%x0\n\tmov.w\t%f0,%e0"; + else + *assembler_p = "shll\t%e0\n\tsubx\t%w0,%w0\n\tmov.b\t%w0,%x0\n\tmov.w\t%f0,%e0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + else + { + if (TARGET_H8300) + { + if (shift_type == SHIFT_ASHIFT) + *assembler_p = "sub.w\t%e0,%e0\n\tshlr\t%w0\n\tmov.w\t%e0,%f0\n\trotxr\t%z0"; + else + *assembler_p = "sub.w\t%f0,%f0\n\tshll\t%z0\n\tmov.w\t%f0,%e0\n\trotxl\t%w0"; + *cc_valid_p = 0; + return SHIFT_SPECIAL; + } + else + { + *assembler_p = rotate_one[cpu][shift_type][shift_mode]; + if (TARGET_H8300S) + *assembler2_p = rotate_two[shift_type][shift_mode]; + else + *assembler2_p = NULL; + *cc_valid_p = 0; + return SHIFT_ROT_AND; + } + } + } + break; + + default: + abort (); + } + + return alg; +} + +/* Emit the assembler code for doing shifts. */ + +char * +emit_a_shift (insn, operands) + rtx insn; + rtx *operands; +{ + static int loopend_lab; + char *assembler; + char *assembler2; + int cc_valid; + rtx inside = PATTERN (insn); + rtx shift = operands[3]; + enum machine_mode mode = GET_MODE (shift); + enum rtx_code code = GET_CODE (shift); + enum shift_type shift_type; + enum shift_mode shift_mode; + + loopend_lab++; + + switch (mode) + { + case QImode: + shift_mode = QIshift; + break; + case HImode: + shift_mode = HIshift; + break; + case SImode: + shift_mode = SIshift; + break; + default: + abort (); + } + + switch (code) + { + case ASHIFTRT: + shift_type = SHIFT_ASHIFTRT; + break; + case LSHIFTRT: + shift_type = SHIFT_LSHIFTRT; + break; + case ASHIFT: + shift_type = SHIFT_ASHIFT; + break; + default: + abort (); + } + + if (GET_CODE (operands[2]) != CONST_INT) + { + /* Indexing by reg, so have to loop and test at top */ + output_asm_insn ("mov.b %X2,%X4", operands); + fprintf (asm_out_file, "\tble .Lle%d\n", loopend_lab); + + /* Get the assembler code to do one shift. */ + get_shift_alg (cpu_type, shift_type, mode, 1, &assembler, + &assembler2, &cc_valid); + } + else + { + int n = INTVAL (operands[2]); + enum shift_alg alg; + + /* If the count is negative, make it 0. */ + if (n < 0) + n = 0; + /* If the count is too big, truncate it. + ANSI says shifts of GET_MODE_BITSIZE are undefined - we choose to + do the intuitive thing. */ + else if (n > GET_MODE_BITSIZE (mode)) + n = GET_MODE_BITSIZE (mode); + + alg = get_shift_alg (cpu_type, shift_type, mode, n, &assembler, + &assembler2, &cc_valid); + + switch (alg) + { + case SHIFT_INLINE: + /* Emit two bit shifts first. */ + while (n > 1 && assembler2 != NULL) + { + output_asm_insn (assembler2, operands); + n -= 2; + } + + /* Now emit one bit shifts for any residual. */ + while (n > 0) + { + output_asm_insn (assembler, operands); + n -= 1; + } + + /* Keep track of CC. */ + if (cc_valid) + { + cc_status.value1 = operands[0]; + cc_status.flags |= cc_valid; + } + return ""; + + case SHIFT_ROT_AND: + { + int m = GET_MODE_BITSIZE (mode) - n; + int mask = (shift_type == SHIFT_ASHIFT + ? ((1 << GET_MODE_BITSIZE (mode) - n) - 1) << n + : (1 << GET_MODE_BITSIZE (mode) - n) - 1); + char insn_buf[200]; + /* Not all possibilities of rotate are supported. They shouldn't + be generated, but let's watch for 'em. */ + if (assembler == 0) + abort (); + + /* Emit two bit rotates first. */ + while (m > 1 && assembler2 != NULL) + { + output_asm_insn (assembler2, operands); + m -= 2; + } + + /* Now single bit rotates for any residual. */ + while (m > 0) + { + output_asm_insn (assembler, operands); + m -= 1; + } + + /* Now mask off the high bits. */ + if (TARGET_H8300) + { + switch (mode) + { + case QImode: + sprintf (insn_buf, "and #%d,%%X0", + mask, n); + cc_status.value1 = operands[0]; + cc_status.flags |= CC_NO_CARRY; + break; + case HImode: + sprintf (insn_buf, "and #%d,%%s0\n\tand #%d,%%t0", + mask & 255, mask >> 8, n); + break; + case SImode: + abort (); + } + } + else + { + sprintf (insn_buf, "and.%c #%d,%%%c0", + "bwl"[shift_mode], mask, + mode == QImode ? 'X' : mode == HImode ? 'T' : 'S'); + cc_status.value1 = operands[0]; + cc_status.flags |= CC_NO_CARRY; + } + output_asm_insn (insn_buf, operands); + return ""; + } + case SHIFT_SPECIAL: + output_asm_insn (assembler, operands); + return ""; + } + + /* A loop to shift by a "large" constant value. + If we have shift-by-2 insns, use them. */ + if (assembler2 != NULL) + { + fprintf (asm_out_file, "\tmov.b #%d,%sl\n", n / 2, + names_big[REGNO (operands[4])]); + fprintf (asm_out_file, ".Llt%d:\n", loopend_lab); + output_asm_insn (assembler2, operands); + output_asm_insn ("add #0xff,%X4", operands); + fprintf (asm_out_file, "\tbne .Llt%d\n", loopend_lab); + if (n % 2) + output_asm_insn (assembler, operands); + return ""; + } + else + { + fprintf (asm_out_file, "\tmov.b #%d,%sl\n", n, + names_big[REGNO (operands[4])]); + fprintf (asm_out_file, ".Llt%d:\n", loopend_lab); + output_asm_insn (assembler, operands); + output_asm_insn ("add #0xff,%X4", operands); + fprintf (asm_out_file, "\tbne .Llt%d\n", loopend_lab); + return ""; + } + } + + fprintf (asm_out_file, ".Llt%d:\n", loopend_lab); + output_asm_insn (assembler, operands); + output_asm_insn ("add #0xff,%X4", operands); + fprintf (asm_out_file, "\tbne .Llt%d\n", loopend_lab); + fprintf (asm_out_file, ".Lle%d:\n", loopend_lab); + + return ""; +} + +/* Fix the operands of a gen_xxx so that it could become a bit + operating insn. */ + +int +fix_bit_operand (operands, what, type) + rtx *operands; + char what; + enum rtx_code type; +{ + /* The bit_operand predicate accepts any memory during RTL generation, but + only 'U' memory afterwards, so if this is a MEM operand, we must force + it to be valid for 'U' by reloading the address. */ + + if (GET_CODE (operands[2]) == CONST_INT) + { + if (CONST_OK_FOR_LETTER_P (INTVAL (operands[2]), what)) + { + /* Ok to have a memory dest. */ + if (GET_CODE (operands[0]) == MEM && !EXTRA_CONSTRAINT (operands[0], 'U')) + { + rtx mem; + mem = gen_rtx (MEM, GET_MODE (operands[0]), + copy_to_mode_reg (Pmode, XEXP (operands[0], 0))); + RTX_UNCHANGING_P (mem) = RTX_UNCHANGING_P (operands[0]); + MEM_COPY_ATTRIBUTES (mem, operands[0]); + operands[0] = mem; + } + + if (GET_CODE (operands[1]) == MEM && !EXTRA_CONSTRAINT (operands[1], 'U')) + { + rtx mem; + mem = gen_rtx (MEM, GET_MODE (operands[1]), + copy_to_mode_reg (Pmode, XEXP (operands[1], 0))); + RTX_UNCHANGING_P (mem) = RTX_UNCHANGING_P (operands[1]); + MEM_COPY_ATTRIBUTES (mem, operands[0]); + operands[1] = mem; + } + return 0; + } + } + + /* Dest and src op must be register. */ + + operands[1] = force_reg (QImode, operands[1]); + { + rtx res = gen_reg_rtx (QImode); + emit_insn (gen_rtx (SET, VOIDmode, res, gen_rtx (type, QImode, operands[1], operands[2]))); + emit_insn (gen_rtx (SET, VOIDmode, operands[0], res)); + } + return 1; +} + +/* Return nonzero if FUNC is an interrupt function as specified + by the "interrupt" attribute. */ + +static int +h8300_interrupt_function_p (func) + tree func; +{ + tree a; + + if (TREE_CODE (func) != FUNCTION_DECL) + return 0; + + a = lookup_attribute ("interrupt_handler", DECL_MACHINE_ATTRIBUTES (func)); + return a != NULL_TREE; +} + +/* Return nonzero if FUNC is an OS_Task function as specified + by the "OS_Task" attribute. */ + +static int +h8300_os_task_function_p (func) + tree func; +{ + tree a; + + if (TREE_CODE (func) != FUNCTION_DECL) + return 0; + + a = lookup_attribute ("OS_Task", DECL_MACHINE_ATTRIBUTES (func)); + return a != NULL_TREE; +} + +/* Return nonzero if FUNC is a monitor function as specified + by the "monitor" attribute. */ + +static int +h8300_monitor_function_p (func) + tree func; +{ + tree a; + + if (TREE_CODE (func) != FUNCTION_DECL) + return 0; + + a = lookup_attribute ("monitor", DECL_MACHINE_ATTRIBUTES (func)); + return a != NULL_TREE; +} + +/* Return nonzero if FUNC is a function that should be called + through the function vector. */ + +int +h8300_funcvec_function_p (func) + tree func; +{ + tree a; + + if (TREE_CODE (func) != FUNCTION_DECL) + return 0; + + a = lookup_attribute ("function_vector", DECL_MACHINE_ATTRIBUTES (func)); + return a != NULL_TREE; +} + +/* Return nonzero if DECL is a variable that's in the eight bit + data area. */ + +int +h8300_eightbit_data_p (decl) + tree decl; +{ + tree a; + + if (TREE_CODE (decl) != VAR_DECL) + return 0; + + a = lookup_attribute ("eightbit_data", DECL_MACHINE_ATTRIBUTES (decl)); + return a != NULL_TREE; +} + +/* Return nonzero if DECL is a variable that's in the tiny + data area. */ + +int +h8300_tiny_data_p (decl) + tree decl; +{ + tree a; + + if (TREE_CODE (decl) != VAR_DECL) + return 0; + + a = lookup_attribute ("tiny_data", DECL_MACHINE_ATTRIBUTES (decl)); + return a != NULL_TREE; +} + +/* Return nonzero if ATTR is a valid attribute for DECL. + ATTRIBUTES are any existing attributes and ARGS are the arguments + supplied with ATTR. + + Supported attributes: + + interrupt_handler: output a prologue and epilogue suitable for an + interrupt handler. + + function_vector: This function should be called through the + function vector. + + eightbit_data: This variable lives in the 8-bit data area and can + be referenced with 8-bit absolute memory addresses. + + tiny_data: This variable lives in the tiny data area and can be + referenced with 16-bit absolute memory references. */ + +int +h8300_valid_machine_decl_attribute (decl, attributes, attr, args) + tree decl; + tree attributes; + tree attr; + tree args; +{ + if (args != NULL_TREE) + return 0; + + if (is_attribute_p ("interrupt_handler", attr) + || is_attribute_p ("OS_Task", attr) + || is_attribute_p ("monitor", attr) + || is_attribute_p ("function_vector", attr)) + return TREE_CODE (decl) == FUNCTION_DECL; + + if (is_attribute_p ("eightbit_data", attr) + && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) + { + if (DECL_INITIAL (decl) == NULL_TREE) + { + warning ("Only initialized variables can be placed into the 8-bit area."); + return 0; + } + DECL_SECTION_NAME (decl) = build_string (7, ".eight"); + return 1; + } + + if (is_attribute_p ("tiny_data", attr) + && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) + { + if (DECL_INITIAL (decl) == NULL_TREE) + { + warning ("Only initialized variables can be placed into the 8-bit area."); + return 0; + } + DECL_SECTION_NAME (decl) = build_string (6, ".tiny"); + return 1; + } + + return 0; +} + +extern struct obstack *saveable_obstack; + +h8300_encode_label (decl) + tree decl; +{ + char *str = XSTR (XEXP (DECL_RTL (decl), 0), 0); + int len = strlen (str); + char *newstr; + + newstr = obstack_alloc (saveable_obstack, len + 2); + + strcpy (newstr + 1, str); + *newstr = '&'; + XSTR (XEXP (DECL_RTL (decl), 0), 0) = newstr; +} + +char * +output_simode_bld (bild, log2, operands) + int bild; + int log2; + rtx operands[]; +{ + /* Clear the destination register. */ + if (TARGET_H8300H || TARGET_H8300S) + output_asm_insn ("sub.l\t%S0,%S0", operands); + else + output_asm_insn ("sub.w\t%e0,%e0\n\tsub.w\t%f0,%f0", operands); + + /* Get the bit number we want to load. */ + if (log2) + operands[2] = GEN_INT (exact_log2 (INTVAL (operands[2]))); + + /* Now output the bit load or bit inverse load, and store it in + the destination. */ + if (bild) + output_asm_insn ("bild\t%Z2,%Y1\n\tbst\t#0,%w0", operands); + else + output_asm_insn ("bld\t%Z2,%Y1\n\tbst\t#0,%w0", operands); + + /* All done. */ + return ""; +} + +/* Given INSN and its current length LENGTH, return the adjustment + (in bytes) to correctly compute INSN's length. + + We use this to get the lengths of various memory references correct. */ + +h8300_adjust_insn_length (insn, length) + rtx insn; + int length; +{ + rtx pat = PATTERN (insn); + + /* Adjust length for reg->mem and mem->reg copies. */ + if (GET_CODE (pat) == SET + && (GET_CODE (SET_SRC (pat)) == MEM + || GET_CODE (SET_DEST (pat)) == MEM)) + { + /* This insn might need a length adjustment. */ + rtx addr; + + if (GET_CODE (SET_SRC (pat)) == MEM) + addr = XEXP (SET_SRC (pat), 0); + else + addr = XEXP (SET_DEST (pat), 0); + + /* On the H8/300, only one adjustment is necessary; if the + address mode is register indirect, then this insn is two + bytes shorter than indicated in the machine description. */ + if (TARGET_H8300 && GET_CODE (addr) == REG) + return -2; + + /* On the H8/300H and H8/S, register indirect is 6 bytes shorter than + indicated in the machine description. */ + if ((TARGET_H8300H || TARGET_H8300S) + && GET_CODE (addr) == REG) + return -6; + + /* On the H8/300H and H8/300S, reg + d, for small displacements is 4 + bytes shorter than indicated in the machine description. */ + if ((TARGET_H8300H || TARGET_H8300S) + && GET_CODE (addr) == PLUS + && GET_CODE (XEXP (addr, 0)) == REG + && GET_CODE (XEXP (addr, 1)) == CONST_INT + && INTVAL (XEXP (addr, 1)) > -32768 + && INTVAL (XEXP (addr, 1)) < 32767) + return -4; + + /* On the H8/300H and H8/300S, abs:16 is two bytes shorter than the + more general abs:24. */ + if ((TARGET_H8300H || TARGET_H8300S) + && GET_CODE (addr) == SYMBOL_REF + && TINY_DATA_NAME_P (XSTR (addr, 0))) + return -2; + } + + /* Loading some constants needs adjustment. */ + if (GET_CODE (pat) == SET + && GET_CODE (SET_SRC (pat)) == CONST_INT + && GET_MODE (SET_DEST (pat)) == SImode + && INTVAL (SET_SRC (pat)) != 0) + { + if (TARGET_H8300 + && ((INTVAL (SET_SRC (pat)) & 0xffff) == 0 + || ((INTVAL (SET_SRC (pat)) >> 16) & 0xffff) == 0)) + return -2; + + if (TARGET_H8300H || TARGET_H8300S) + { + int val = INTVAL (SET_SRC (pat)); + + if (val == (val & 0xff) + || val == (val & 0xff00)) + return -6; + + if (val == -4 || val == -2 || val == -1) + return -6; + } + } + + /* Shifts need various adjustments. */ + if (GET_CODE (pat) == PARALLEL + && GET_CODE (XVECEXP (pat, 0, 0)) == SET + && (GET_CODE (SET_SRC (XVECEXP (pat, 0, 0))) == ASHIFTRT + || GET_CODE (SET_SRC (XVECEXP (pat, 0, 0))) == LSHIFTRT + || GET_CODE (SET_SRC (XVECEXP (pat, 0, 0))) == ASHIFT)) + { + rtx src = SET_SRC (XVECEXP (pat, 0, 0)); + enum machine_mode mode = GET_MODE (src); + + if (GET_CODE (XEXP (src, 1)) != CONST_INT) + return 0; + + /* QImode shifts by small constants take one insn + per shift. So the adjustment is 20 (md length) - + # shifts * 2. */ + if (mode == QImode && INTVAL (XEXP (src, 1)) <= 4) + return -(20 - INTVAL (XEXP (src, 1)) * 2); + + /* Similarly for HImode and SImode shifts by + small constants on the H8/300H and H8/300S. */ + if ((TARGET_H8300H || TARGET_H8300S) + && (mode == HImode || mode == SImode) + && INTVAL (XEXP (src, 1)) <= 4) + return -(20 - INTVAL (XEXP (src, 1)) * 2); + + /* HImode shifts by small constants for the H8/300. */ + if (mode == HImode + && INTVAL (XEXP (src, 1)) <= 4) + return -(20 - (INTVAL (XEXP (src, 1)) + * (GET_CODE (src) == ASHIFT ? 2 : 4))); + + /* SImode shifts by small constants for the H8/300. */ + if (mode == SImode + && INTVAL (XEXP (src, 1)) <= 2) + return -(20 - (INTVAL (XEXP (src, 1)) + * (GET_CODE (src) == ASHIFT ? 6 : 8))); + + /* XXX ??? Could check for more shift/rotate cases here. */ + } + + return 0; +} |