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* config/tc-mips.c (MAX_VR4130_NOPS, MAX_DELAY_NOPS): New macros.
(MAX_NOPS): Bump to 4. (mips_fix_vr4130): New variable. (nops_for_vr4130): New function. (nops_for_insn): Use MAX_DELAY_NOPS rather than MAX_NOPS. Use nops_for_vr4130 if working around VR4130 errata. (OPTION_FIX_VR4130, OPTION_NO_FIX_VR4130): New macros. (md_longopts): Add -mfix-vr4130 and -mno-fix-vr4130. (md_parse_option): Handle them. (md_show_usage): Print them. * doc/c-mips.texi: Document -mfix-vr4130 and -mno-fix-vr4130.
This commit is contained in:
Richard Sandiford
parent
dc36a61fc5
commit
7d8e00cf78
@ -1,3 +1,17 @@
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2005-03-09 Richard Sandiford <rsandifo@redhat.com>
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* config/tc-mips.c (MAX_VR4130_NOPS, MAX_DELAY_NOPS): New macros.
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(MAX_NOPS): Bump to 4.
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(mips_fix_vr4130): New variable.
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(nops_for_vr4130): New function.
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(nops_for_insn): Use MAX_DELAY_NOPS rather than MAX_NOPS. Use
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nops_for_vr4130 if working around VR4130 errata.
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(OPTION_FIX_VR4130, OPTION_NO_FIX_VR4130): New macros.
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(md_longopts): Add -mfix-vr4130 and -mno-fix-vr4130.
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(md_parse_option): Handle them.
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(md_show_usage): Print them.
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* doc/c-mips.texi: Document -mfix-vr4130 and -mno-fix-vr4130.
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2005-03-09 Richard Sandiford <rsandifo@redhat.com>
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* config/tc-mips.c (append_insn): Remove cop_interlocks test from
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@ -557,9 +557,14 @@ static int mips_optimize = 2;
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equivalent to seeing no -g option at all. */
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static int mips_debug = 0;
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/* The maximum number of NOPs needed to satisfy a hardware hazard
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or processor errata. */
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#define MAX_NOPS 2
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/* The maximum number of NOPs needed to avoid the VR4130 mflo/mfhi errata. */
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#define MAX_VR4130_NOPS 4
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/* The maximum number of NOPs needed to fill delay slots. */
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#define MAX_DELAY_NOPS 2
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/* The maximum number of NOPs needed for any purpose. */
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#define MAX_NOPS 4
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/* A list of previous instructions, with index 0 being the most recent.
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We need to look back MAX_NOPS instructions when filling delay slots
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@ -659,6 +664,9 @@ static unsigned int vr4120_conflicts[NUM_FIX_VR4120_CLASSES];
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/* True if -mfix-vr4120 is in force. */
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static int mips_fix_vr4120;
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/* ...likewise -mfix-vr4130. */
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static int mips_fix_vr4130;
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/* We don't relax branches by default, since this causes us to expand
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`la .l2 - .l1' if there's a branch between .l1 and .l2, because we
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fail to compute the offset before expanding the macro to the most
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@ -2011,6 +2019,48 @@ insns_between (const struct mips_cl_insn *insn1,
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return 0;
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}
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/* Return the number of nops that would be needed to work around the
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VR4130 mflo/mfhi errata if instruction INSN immediately followed
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the MAX_VR4130_NOPS instructions described by HISTORY. */
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static int
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nops_for_vr4130 (const struct mips_cl_insn *history,
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const struct mips_cl_insn *insn)
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{
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int i, j, reg;
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/* Check if the instruction writes to HI or LO. MTHI and MTLO
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are not affected by the errata. */
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if (insn != 0
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&& ((insn->insn_mo->pinfo & (INSN_WRITE_HI | INSN_WRITE_LO)) == 0
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|| strcmp (insn->insn_mo->name, "mtlo") == 0
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|| strcmp (insn->insn_mo->name, "mthi") == 0))
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return 0;
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/* Search for the first MFLO or MFHI. */
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for (i = 0; i < MAX_VR4130_NOPS; i++)
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if (!history[i].noreorder_p && MF_HILO_INSN (history[i].insn_mo->pinfo))
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{
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/* Extract the destination register. */
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if (mips_opts.mips16)
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reg = mips16_to_32_reg_map[MIPS16_EXTRACT_OPERAND (RX, history[i])];
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else
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reg = EXTRACT_OPERAND (RD, history[i]);
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/* No nops are needed if INSN reads that register. */
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if (insn != NULL && insn_uses_reg (insn, reg, MIPS_GR_REG))
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return 0;
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/* ...or if any of the intervening instructions do. */
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for (j = 0; j < i; j++)
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if (insn_uses_reg (&history[j], reg, MIPS_GR_REG))
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return 0;
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return MAX_VR4130_NOPS - i;
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}
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return 0;
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}
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/* Return the number of nops that would be needed if instruction INSN
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immediately followed the MAX_NOPS instructions given by HISTORY,
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where HISTORY[0] is the most recent instruction. If INSN is null,
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@ -2023,13 +2073,21 @@ nops_for_insn (const struct mips_cl_insn *history,
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int i, nops, tmp_nops;
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nops = 0;
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for (i = 0; i < MAX_NOPS; i++)
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for (i = 0; i < MAX_DELAY_NOPS; i++)
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if (!history[i].noreorder_p)
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{
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tmp_nops = insns_between (history + i, insn) - i;
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if (tmp_nops > nops)
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nops = tmp_nops;
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}
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if (mips_fix_vr4130)
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{
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tmp_nops = nops_for_vr4130 (history, insn);
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if (tmp_nops > nops)
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nops = tmp_nops;
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}
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return nops;
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}
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@ -9966,9 +10024,13 @@ struct option md_longopts[] =
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#define OPTION_NO_FIX_VR4120 (OPTION_FIX_BASE + 3)
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{"mfix-vr4120", no_argument, NULL, OPTION_FIX_VR4120},
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{"mno-fix-vr4120", no_argument, NULL, OPTION_NO_FIX_VR4120},
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#define OPTION_FIX_VR4130 (OPTION_FIX_BASE + 4)
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#define OPTION_NO_FIX_VR4130 (OPTION_FIX_BASE + 5)
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{"mfix-vr4130", no_argument, NULL, OPTION_FIX_VR4130},
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{"mno-fix-vr4130", no_argument, NULL, OPTION_NO_FIX_VR4130},
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/* Miscellaneous options. */
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#define OPTION_MISC_BASE (OPTION_FIX_BASE + 4)
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#define OPTION_MISC_BASE (OPTION_FIX_BASE + 6)
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#define OPTION_TRAP (OPTION_MISC_BASE + 0)
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{"trap", no_argument, NULL, OPTION_TRAP},
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{"no-break", no_argument, NULL, OPTION_TRAP},
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@ -10211,6 +10273,14 @@ md_parse_option (int c, char *arg)
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mips_fix_vr4120 = 0;
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break;
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case OPTION_FIX_VR4130:
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mips_fix_vr4130 = 1;
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break;
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case OPTION_NO_FIX_VR4130:
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mips_fix_vr4130 = 0;
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break;
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case OPTION_RELAX_BRANCH:
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mips_relax_branch = 1;
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break;
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@ -13886,6 +13956,7 @@ MIPS options:\n\
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-no-mips16 do not generate mips16 instructions\n"));
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fprintf (stream, _("\
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-mfix-vr4120 work around certain VR4120 errata\n\
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-mfix-vr4130 work around VR4130 mflo/mfhi errata\n\
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-mgp32 use 32-bit GPRs, regardless of the chosen ISA\n\
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-mfp32 use 32-bit FPRs, regardless of the chosen ISA\n\
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-mno-shared optimize output for executables\n\
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@ -1,3 +1,8 @@
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2005-03-09 Richard Sandiford <rsandifo@redhat.com>
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* gas/mips/vr4130.[sd]: New test.
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* gas/mips/mips.exp: Run it.
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2005-03-09 Richard Sandiford <rsandifo@redhat.com>
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* gas/mips/relax-swap1-mips[12].d: Expect the delay slots of
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705
gas/testsuite/gas/mips/vr4130.d
Normal file
705
gas/testsuite/gas/mips/vr4130.d
Normal file
@ -0,0 +1,705 @@
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#as: -mfix-vr4130 -march=vr4130 -mabi=o64
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#objdump: -dz
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#name: MIPS VR4130 workarounds
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.*file format.*
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Disassembly.*
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.* <foo>:
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#
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# PART A
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#
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.* mfhi .*
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.* mult .*
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#
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.* mflo .*
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.* mult .*
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#
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# PART B
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#
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.* mfhi .*
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.* nop
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.* nop
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.* nop
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.* nop
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.* mult .*
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#
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.* mfhi .*
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.* addiu .*
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.* nop
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.* nop
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.* nop
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.* mult .*
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* nop
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.* nop
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.* mult .*
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* addiu .*
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.* nop
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.* mult .*
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* addiu .*
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.* addiu .*
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.* mult .*
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#
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# PART C
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* addiu .*
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.* mult .*
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* addiu .*
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.* mult .*
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* addiu .*
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.* mult .*
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* addiu .*
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.* mult .*
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#
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# PART D
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#
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.* mfhi .*
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.* nop
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.* nop
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.* mult .*
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#
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.* mfhi .*
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.* addiu .*
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.* nop
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.* mult .*
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#
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.* mfhi .*
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.* addiu .*
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.* nop
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.* mult .*
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#
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# PART E
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#
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.* mfhi .*
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.* nop
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.* nop
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.* bnez .*
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.* nop
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#
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.* mfhi .*
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.* addiu .*
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.* nop
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.* bnez .*
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.* nop
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* bnez .*
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.* nop
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* addiu .*
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.* bnez .*
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.* nop
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#
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# PART F
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#
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.* mfhi .*
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.* addiu .*
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.* nop
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.* bnez .*
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.* nop
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* bnez .*
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.* nop
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#
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.* mfhi .*
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.* addiu .*
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.* addiu .*
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.* bnez .*
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.* addiu .*
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#
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# PART G
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#
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.* mfhi .*
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.* addiu .*
|
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.* nop
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.* nop
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||||
.* nop
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||||
.* mult .*
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#
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.* mfhi .*
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||||
.* addiu .*
|
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.* addiu .*
|
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.* nop
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||||
.* nop
|
||||
.* mult .*
|
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#
|
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.* mfhi .*
|
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.* addiu .*
|
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.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
# PART H
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#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
# PART I
|
||||
#
|
||||
.* mflo .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mflo .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* multu .*
|
||||
#
|
||||
.* mflo .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmult .*
|
||||
#
|
||||
.* mflo .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmultu .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* div .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* divu .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* ddiv .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* ddivu .*
|
||||
#
|
||||
# PART J
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* macc .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* macchi .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* macchis .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* macchiu .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* macchius .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* maccs .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* maccu .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* maccus .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmacc .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmacchi .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmacchis .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmacchiu .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmacchius .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmaccs .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmaccu .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmaccus .*
|
||||
#
|
||||
# PART K
|
||||
#
|
||||
.* mflo .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* mtlo .*
|
||||
#
|
||||
.* mflo .*
|
||||
.* mthi .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* mtlo .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* mthi .*
|
||||
|
||||
.* <bar>:
|
||||
#
|
||||
# PART A
|
||||
#
|
||||
.* mfhi .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mflo .*
|
||||
.* mult .*
|
||||
#
|
||||
# PART B
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
# PART C
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
# PART D
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
# PART E
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* bnez .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* bnez .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* bnez .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* bnez .*
|
||||
#
|
||||
# PART F
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* bnez .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* bnez .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* bnez .*
|
||||
#
|
||||
# PART G
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
# PART H
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* addiu .*
|
||||
.* mult .*
|
||||
#
|
||||
# PART I
|
||||
#
|
||||
.* mflo .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* mult .*
|
||||
#
|
||||
.* mflo .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* multu .*
|
||||
#
|
||||
.* mflo .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmult .*
|
||||
#
|
||||
.* mflo .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* dmultu .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* div .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* divu .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* ddiv .*
|
||||
#
|
||||
.* mfhi .*
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* nop
|
||||
.* ddivu .*
|
||||
#pass
|
||||
305
gas/testsuite/gas/mips/vr4130.s
Normal file
305
gas/testsuite/gas/mips/vr4130.s
Normal file
@ -0,0 +1,305 @@
|
||||
.macro check2 insn
|
||||
mflo $2
|
||||
\insn $3,$3
|
||||
.endm
|
||||
|
||||
.macro check3 insn
|
||||
mfhi $2
|
||||
\insn $0,$3,$3
|
||||
.endm
|
||||
|
||||
.macro main func
|
||||
|
||||
.ent \func
|
||||
.type \func,@function
|
||||
\func:
|
||||
|
||||
# PART A
|
||||
#
|
||||
# Check that mfhis and mflos in .set noreorder blocks are not
|
||||
# considered.
|
||||
|
||||
.set noreorder
|
||||
mfhi $2
|
||||
.set reorder
|
||||
mult $3,$3
|
||||
|
||||
.set noreorder
|
||||
mflo $2
|
||||
.set reorder
|
||||
mult $3,$3
|
||||
|
||||
# PART B
|
||||
#
|
||||
# Check for simple instances.
|
||||
|
||||
mfhi $2
|
||||
mult $3,$3 # 4 nops
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
mult $4,$4 # 3 nops
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
mult $5,$5 # 2 nops
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
addiu $5,1
|
||||
mult $6,$6 # 1 nop
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
addiu $5,1
|
||||
addiu $6,1
|
||||
mult $7,$7 # 0 nops
|
||||
|
||||
# PART C
|
||||
#
|
||||
# Check that no nops are inserted after the result has been read.
|
||||
|
||||
mfhi $2
|
||||
addiu $2,1
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
mult $5,$5
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $2,1
|
||||
addiu $4,1
|
||||
mult $5,$5
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
addiu $2,1
|
||||
mult $5,$5
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
addiu $5,1
|
||||
mult $2,$2
|
||||
|
||||
# PART D
|
||||
#
|
||||
# Check that we still insert the usual interlocking nops in cases
|
||||
# where the VR4130 errata doesn't apply.
|
||||
|
||||
mfhi $2
|
||||
mult $2,$2 # 2 nops
|
||||
|
||||
mfhi $2
|
||||
addiu $2,1
|
||||
mult $3,$3 # 1 nop
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
mult $2,$2 # 1 nop
|
||||
|
||||
# PART E
|
||||
#
|
||||
# Check for branches whose targets might be affected.
|
||||
|
||||
mfhi $2
|
||||
bnez $3,1f # 2 nops for normal mode, 3 for mips16
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
bnez $3,1f # 1 nop for normal mode, 2 for mips16
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $3,1
|
||||
bnez $3,1f # 0 nops for normal mode, 1 for mips16
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $3,1
|
||||
addiu $3,1
|
||||
bnez $3,1f # 0 nops
|
||||
|
||||
# PART F
|
||||
#
|
||||
# As above, but with no dependencies between the branch and
|
||||
# the previous instruction. The final branch can use the
|
||||
# preceding addiu as its delay slot.
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
bnez $4,1f # 1 nop for normal mode, 2 for mips16
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
bnez $5,1f # 0 nops for normal mode, 1 for mips16
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
addiu $5,1
|
||||
bnez $6,1f # 0 nops, fill delay slot in normal mode
|
||||
1:
|
||||
|
||||
# PART G
|
||||
#
|
||||
# Like part B, but check that intervening .set noreorders don't
|
||||
# affect the number of nops.
|
||||
|
||||
mfhi $2
|
||||
.set noreorder
|
||||
addiu $3,1
|
||||
.set reorder
|
||||
mult $4,$4 # 3 nops
|
||||
|
||||
mfhi $2
|
||||
.set noreorder
|
||||
addiu $3,1
|
||||
.set reorder
|
||||
addiu $4,1
|
||||
mult $5,$5 # 2 nops
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
.set noreorder
|
||||
addiu $4,1
|
||||
.set reorder
|
||||
mult $5,$5 # 2 nops
|
||||
|
||||
mfhi $2
|
||||
.set noreorder
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
.set reorder
|
||||
mult $5,$5 # 2 nops
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
.set noreorder
|
||||
addiu $4,1
|
||||
.set reorder
|
||||
addiu $5,1
|
||||
mult $6,$6 # 1 nop
|
||||
|
||||
mfhi $2
|
||||
.set noreorder
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
addiu $5,1
|
||||
.set reorder
|
||||
mult $6,$6 # 1 nop
|
||||
|
||||
mfhi $2
|
||||
.set noreorder
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
addiu $5,1
|
||||
addiu $6,1
|
||||
.set reorder
|
||||
mult $7,$7 # 0 nops
|
||||
|
||||
# PART H
|
||||
#
|
||||
# Like part B, but the mult occurs in a .set noreorder block.
|
||||
|
||||
mfhi $2
|
||||
.set noreorder
|
||||
mult $3,$3 # 4 nops
|
||||
.set reorder
|
||||
|
||||
mfhi $2
|
||||
.set noreorder
|
||||
addiu $3,1
|
||||
mult $4,$4 # 3 nops
|
||||
.set reorder
|
||||
|
||||
mfhi $2
|
||||
addiu $3,1
|
||||
.set noreorder
|
||||
addiu $4,1
|
||||
mult $5,$5 # 2 nops
|
||||
.set reorder
|
||||
|
||||
mfhi $2
|
||||
.set noreorder
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
addiu $5,1
|
||||
mult $6,$6 # 1 nop
|
||||
.set reorder
|
||||
|
||||
mfhi $2
|
||||
.set noreorder
|
||||
addiu $3,1
|
||||
addiu $4,1
|
||||
addiu $5,1
|
||||
addiu $6,1
|
||||
mult $7,$7 # 0 nops
|
||||
.set reorder
|
||||
|
||||
# PART I
|
||||
#
|
||||
# Check every affected multiplication and division instruction.
|
||||
|
||||
check2 mult
|
||||
check2 multu
|
||||
check2 dmult
|
||||
check2 dmultu
|
||||
|
||||
check3 div
|
||||
check3 divu
|
||||
check3 ddiv
|
||||
check3 ddivu
|
||||
|
||||
.end \func
|
||||
.endm
|
||||
|
||||
.set nomips16
|
||||
main foo
|
||||
|
||||
# PART J
|
||||
#
|
||||
# Check every affected multiply-accumulate instruction.
|
||||
|
||||
check3 macc
|
||||
check3 macchi
|
||||
check3 macchis
|
||||
check3 macchiu
|
||||
check3 macchius
|
||||
check3 maccs
|
||||
check3 maccu
|
||||
check3 maccus
|
||||
|
||||
check3 dmacc
|
||||
check3 dmacchi
|
||||
check3 dmacchis
|
||||
check3 dmacchiu
|
||||
check3 dmacchius
|
||||
check3 dmaccs
|
||||
check3 dmaccu
|
||||
check3 dmaccus
|
||||
|
||||
# PART K
|
||||
#
|
||||
# Check that mtlo and mthi are exempt from the VR4130 errata,
|
||||
# although the usual interlocking delay applies.
|
||||
|
||||
mflo $2
|
||||
mtlo $3
|
||||
|
||||
mflo $2
|
||||
mthi $3
|
||||
|
||||
mfhi $2
|
||||
mtlo $3
|
||||
|
||||
mfhi $2
|
||||
mthi $3
|
||||
|
||||
.set mips16
|
||||
main bar
|
||||
Loading…
Reference in New Issue
Block a user