From 8fdb5ee7c5c3e16348ce0342d31d57849caa369c Mon Sep 17 00:00:00 2001 From: rsandifo Date: Wed, 9 Mar 2005 09:14:19 +0000 Subject: [PATCH] * config/tc-mips.c (mips_cl_insn): Replace the valid_p, delay_slot_p and extended_p fields with a single fixed_p field. (append_insn, mips_no_prev_insn): Adjust accordingly. --- gas/ChangeLog | 6 ++++++ gas/config/tc-mips.c | 53 +++++++++++++--------------------------------------- 2 files changed, 19 insertions(+), 40 deletions(-) diff --git a/gas/ChangeLog b/gas/ChangeLog index 84f0304ae1..f3d7d91764 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,5 +1,11 @@ 2005-03-09 Richard Sandiford + * config/tc-mips.c (mips_cl_insn): Replace the valid_p, delay_slot_p + and extended_p fields with a single fixed_p field. + (append_insn, mips_no_prev_insn): Adjust accordingly. + +2005-03-09 Richard Sandiford + * config/tc-mips.c (mips_cl_insn): Replace reloc_type array with a single mips16_absolute_jump_p bit. (append_insn): Adjust accordingly. diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c index 9fcb99fb83..dc5248b8f8 100644 --- a/gas/config/tc-mips.c +++ b/gas/config/tc-mips.c @@ -146,19 +146,12 @@ struct mips_cl_insn /* The relocs associated with the instruction, if any. */ fixS *fixp[3]; - /* True if this entry describes a real instruction. */ - unsigned int valid_p : 1; + /* True if this entry cannot be moved from its current position. */ + unsigned int fixed_p : 1; /* True if this instruction occured in a .set noreorder block. */ unsigned int noreorder_p : 1; - /* True if this instruction corresponds to an assembler-filled - delay slot. Always false if noreorder_p. */ - unsigned int delay_slot_p : 1; - - /* True for extended mips16 instructions. */ - unsigned int extended_p : 1; - /* True for mips16 instructions that jump to an absolute address. */ unsigned int mips16_absolute_jump_p : 1; }; @@ -2357,12 +2350,9 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr, /* If we had to emit any NOP instructions, then we already know we can not swap. */ || nops != 0 - /* If we don't even know the previous insn, we can not - swap. */ - || ! history[0].valid_p - /* If the previous insn is already in a branch delay - slot, then we can not swap. */ - || history[0].delay_slot_p + /* We can't swap if the previous instruction's position + is fixed. */ + || history[0].fixed_p /* If the previous previous insn was in a .set noreorder, we can't swap. Actually, the MIPS assembler will swap in this situation. However, gcc @@ -2374,11 +2364,7 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr, bne $4,$0,foo in which we can not swap the bne and INSN. If gcc is not configured -with-gnu-as, it does not output the - .set pseudo-ops. We don't have to check - history[0].noreorder_p, because history[0].valid_p will - be 0 in that case. We don't want to use - history[1].valid_p, because we do want to be able - to swap at the start of a function. */ + .set pseudo-ops. */ || history[1].noreorder_p /* If the branch is itself the target of a branch, we can not swap. We cheat on this; all we check for is @@ -2542,9 +2528,6 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr, swap. */ || (mips_opts.mips16 && (prev_pinfo & MIPS16_INSN_READ_PC)) - /* If the previous instruction was extended, we can not - swap. */ - || (mips_opts.mips16 && history[0].extended_p) /* If the previous instruction had a fixup in mips16 mode, we can not swap. This normally means that the previous instruction was a 4 byte branch anyhow. */ @@ -2700,7 +2683,7 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr, history[1].extend = ip->extend; history[1].insn_opcode = ip->insn_opcode; } - history[0].delay_slot_p = 1; + history[0].fixed_p = 1; /* If that was an unconditional branch, forget the previous insn information. */ @@ -2714,7 +2697,6 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr, history[0].fixp[1] = NULL; history[0].fixp[2] = NULL; history[0].mips16_absolute_jump_p = 0; - history[0].extended_p = 0; } else if (pinfo & INSN_COND_BRANCH_LIKELY) { @@ -2733,8 +2715,7 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr, history[0].fixp[1] = NULL; history[0].fixp[2] = NULL; history[0].mips16_absolute_jump_p = 0; - history[0].extended_p = 0; - history[0].delay_slot_p = 1; + history[0].fixed_p = 1; } else { @@ -2752,27 +2733,20 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr, history[0].use_extend = ip->use_extend; history[0].extend = ip->extend; history[0].insn_opcode = ip->insn_opcode; - - /* Any time we see a branch, we always fill the delay slot - immediately; since this insn is not a branch, we know it - is not in a delay slot. */ - history[0].delay_slot_p = 0; - + history[0].fixed_p = (mips_opts.mips16 + && (ip->use_extend + || *reloc_type > BFD_RELOC_UNUSED)); history[0].fixp[0] = fixp[0]; history[0].fixp[1] = fixp[1]; history[0].fixp[2] = fixp[2]; history[0].mips16_absolute_jump_p = (reloc_type[0] == BFD_RELOC_MIPS16_JMP); - if (mips_opts.mips16) - history[0].extended_p = (ip->use_extend - || *reloc_type > BFD_RELOC_UNUSED); } history[1].noreorder_p = history[0].noreorder_p; history[0].noreorder_p = 0; history[0].frag = frag_now; history[0].where = f - frag_now->fr_literal; - history[0].valid_p = 1; } else if (mips_relax.sequence != 2) { @@ -2791,6 +2765,7 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr, == BFD_RELOC_MIPS16_JMP); history[1].noreorder_p = history[0].noreorder_p; history[0].noreorder_p = 1; + history[0].fixed_p = 1; } /* We just output an insn, so the next one doesn't have a label. */ @@ -2813,10 +2788,8 @@ mips_no_prev_insn (int preserve) prev_nop_frag_required = 0; prev_nop_frag_since = 0; } - history[0].valid_p = 0; - history[0].delay_slot_p = 0; + history[0].fixed_p = 1; history[0].noreorder_p = 0; - history[0].extended_p = 0; history[0].mips16_absolute_jump_p = 0; history[1].noreorder_p = 0; mips_clear_insn_labels (); -- 2.11.0