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* config/tc-d30v.c (parallel_ok): For the explicitly parallel
case, allow the parallel instructions to modify the same flag bits. PR 14883
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@ -1,3 +1,11 @@
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start-sanitize-d30v
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Tue Feb 17 17:02:15 1998 Fred Fish <fnf@cygnus.com>
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* config/tc-d30v.c (parallel_ok): For the explicitly parallel
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case, allow the parallel instructions to modify the same flag
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bits.
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end-sanitize-d30v
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Thu Feb 19 16:08:15 1998 Richard Henderson <rth@cygnus.com>
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* listing.c (list_symbol_table): Categorize symbols by
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@ -1,6 +1,6 @@
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/* tc-d30v.c -- Assembler code for the Mitsubishi D30V
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Copyright (C) 1997 Free Software Foundation.
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Copyright (C) 1997, 1998 Free Software Foundation.
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This file is part of GAS, the GNU Assembler.
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@ -44,9 +44,9 @@ static int Optimizing = 0;
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typedef enum _exec_type
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{
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EXEC_UNKNOWN, /* no order specified */
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EXEC_PARALLEL, /* done in parallel */
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EXEC_SEQ, /* sequential */
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EXEC_REVSEQ /* reverse sequential */
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EXEC_PARALLEL, /* done in parallel (FM=00) */
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EXEC_SEQ, /* sequential (FM=01) */
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EXEC_REVSEQ /* reverse sequential (FM=10) */
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} exec_type_enum;
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/* fixups */
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@ -74,6 +74,15 @@ static Fixups *fixups;
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int cur_mul32_p = 0;
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int prev_mul32_p = 0;
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/* The flag_explicitly_parallel is true iff the instruction being assembled
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has been explicitly written as a parallel short-instruction pair by the
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human programmer. It is used in parallel_ok() to distinguish between
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those dangerous parallelizations attempted by the human, which are to be
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allowed, and those attempted by the assembler, which are not. It is set
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from md_assemble(). */
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static int flag_explicitly_parallel = 0;
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static int flag_xp_state = 0;
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/* Two nops */
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#define NOP_LEFT ((long long)NOP << 32)
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#define NOP_RIGHT ((long long)NOP)
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@ -709,6 +718,7 @@ write_2_short (opcode1, insn1, opcode2, insn2, exec_type, fx)
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break;
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case EXEC_PARALLEL: /* parallel */
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flag_explicitly_parallel = flag_xp_state;
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if (! parallel_ok (opcode1, insn1, opcode2, insn2, exec_type))
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as_fatal ("Instructions may not be executed in parallel");
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else if (opcode1->op->unit == IU)
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@ -730,6 +740,7 @@ write_2_short (opcode1, insn1, opcode2, insn2, exec_type, fx)
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insn = FM00 | (insn1 << 32) | insn2;
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fx = fx->next;
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}
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flag_explicitly_parallel = 0;
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break;
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case EXEC_SEQ: /* sequential */
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@ -1000,8 +1011,20 @@ parallel_ok (op1, insn1, op2, insn2, exec_type)
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/* If the second instruction depends on the first, we obviously
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cannot parallelize. Note, the mod flag implies use, so
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check that as well. */
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if ((mod_reg[0][j] & (mod_reg[1][j] | used_reg[1][j])) != 0)
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return 0;
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/* If flag_explicitly_parallel is set, then the case of the
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second instruction using a register the first instruction
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modifies is assumed to be okay; we trust the human. We
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don't trust the human if both instructions modify the same
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register but we do trust the human if they modify the same
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flags. */
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if (flag_explicitly_parallel)
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{
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if ((j < 2) && (mod_reg[0][j] & mod_reg[1][j]) != 0)
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return 0;
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}
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else
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if ((mod_reg[0][j] & (mod_reg[1][j] | used_reg[1][j])) != 0)
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return 0;
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}
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return 1;
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@ -1032,12 +1055,17 @@ md_assemble (str)
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if ( (prev_insn != -1) && prev_seg && ((prev_seg != now_seg) || (prev_subseg != now_subseg)))
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d30v_cleanup();
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flag_explicitly_parallel = 0;
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flag_xp_state = 0;
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if (etype == EXEC_UNKNOWN)
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{
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/* look for the special multiple instruction separators */
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str2 = strstr (str, "||");
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if (str2)
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extype = EXEC_PARALLEL;
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{
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extype = EXEC_PARALLEL;
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flag_xp_state = 1;
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}
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else
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{
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str2 = strstr (str, "->");
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@ -1262,7 +1290,7 @@ do_assemble (str, opcode)
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break;
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case 'l':
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fsize = FORCE_LONG;
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default:
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break;
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}
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name[nlen-2] = 0;
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}
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