mirror of
https://sourceware.org/git/binutils-gdb.git
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Fix a number of problems in the r5900 specific p* (parallel) instructions.
In particular a host endian dependency one fixed resolved most problems.
This commit is contained in:
Andrew Cagney
parent
2476848aaf
commit
1e851d2c82
@ -1,3 +1,49 @@
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start-sanitize-r5900
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Thu Jul 10 11:58:48 1997 Andrew Cagney <cagney@critters.cygnus.com>
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* gencode.c (build_instruction): For "ppac5" use unsigned
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arrithmetic so that the sign bit doesn't smear when right shifted.
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(build_instruction): For "pdiv" perform sign extension when
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storing results in HI and LO.
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(build_instructions): For "pdiv" and "pdivbw" check for
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divide-by-zero.
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(build_instruction): For "pmfhl.slw" update hi part of dest
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register as well as low part.
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(build_instruction): For "pmfhl" portably handle long long values.
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(build_instruction): For "pmfhl.sh" correctly negative values.
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Store half words 2 and three in the correct place.
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(build_instruction): For "psllvw", sign extend value after shift.
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end-sanitize-r5900
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Thu Jun 26 12:13:17 1997 Angela Marie Thomas (angela@cygnus.com)
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* sim/mips/configure: Change default_sim_endian to 0 (bi-endian)
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* sim/mips/configure.in: Regenerate.
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Wed Jul 9 10:29:21 1997 Andrew Cagney <cagney@critters.cygnus.com>
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* interp.c (SUB_REG_UW, SUB_REG_SW, SUB_REG_*): Use more explicit
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signed8, unsigned8 et.al. types.
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start-sanitize-r5900
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* gencode.c (build_instruction): For PMULTU* do not sign extend
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registers. Make generated code easier to debug.
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end-sanitize-r5900
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* interp.c (SUB_REG_FETCH): Handle both little and big endian
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hosts when selecting subreg.
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start-sanitize-r5900
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Tue Jul 8 18:07:20 1997 Andrew Cagney <cagney@andros.cygnus.com>
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* gencode.c (type_for_data_len): For 32bit operations concerned
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with overflow, perform op using 64bits.
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(build_instruction): For PADD, always compute operation using type
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returned by type_for_data_len.
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(build_instruction): For PSUBU, when overflow, saturate to zero as
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actually underflow.
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end-sanitize-r5900
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Wed Jul 2 11:54:10 1997 Jeffrey A Law (law@cygnus.com)
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start-sanitize-r5900
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@ -6,8 +52,8 @@ start-sanitize-r5900
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* gencode.c (build_instruction): Handle "ppac5" according to
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version 1.95 of the r5900 ISA.
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end-sanitize-r5900
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end-sanitize-r5900
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* interp.c (sim_engine_run): Reset the ZERO register to zero
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regardless of FEATURE_WARN_ZERO.
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* gencode.c (FEATURE_WARNINGS): Remove FEATURE_WARN_ZERO.
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@ -7,7 +7,7 @@ SIM_AC_COMMON
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dnl Options available in this module
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SIM_AC_OPTION_INLINE(0)
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SIM_AC_OPTION_ENDIAN(BIG_ENDIAN)
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SIM_AC_OPTION_ENDIAN(0)
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SIM_AC_OPTION_HOSTENDIAN
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SIM_AC_OPTION_WARNINGS
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@ -1001,20 +1001,21 @@ letter_for_data_len( insn )
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}
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static char*
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type_for_data_len( insn )
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type_for_data_len( insn , is_signed )
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struct instruction* insn;
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int is_signed;
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{
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if (GETDATASIZEINSN(insn) == BYTE)
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return "int";
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return is_signed ? "int" : "unsigned int";
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else if (GETDATASIZEINSN(insn) == HALFWORD)
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return "int";
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return is_signed ? "int" : "unsigned int";
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else if (GETDATASIZEINSN(insn) == WORD)
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return "long";
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return is_signed ? "signed64" : "unsigned64";
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else if (GETDATASIZEINSN(insn) == DOUBLEWORD)
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return "long long";
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return 0;
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else if (GETDATASIZEINSN(insn) == QUADWORD)
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return 0;
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@ -3363,45 +3364,52 @@ build_instruction (doisa, features, mips16, insn)
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char* tmptype;
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char* maximum;
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char* maxsat;
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char* minimum;
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char* signedness;
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char* signletter;
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if ( insn->flags & UNSIGNED )
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{
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tmptype = type_for_data_len( insn );
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signedness = "unsigned";
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tmptype = type_for_data_len( insn, 0/*unsigned*/ );
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signletter = "U";
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maximum = umax_for_data_len( insn );
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maxsat = (insn->flags & SUBTRACT) ? "0" : maximum;
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minimum = 0;
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}
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else if ( insn->flags & SATURATE )
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{
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tmptype = type_for_data_len( insn );
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signedness = "";
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tmptype = type_for_data_len( insn, 1/*signed*/ );
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signletter = "S";
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maximum = max_for_data_len( insn );
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maxsat = maximum;
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minimum = min_for_data_len( insn );
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}
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else
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{
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tmptype = type_for_data_len( insn );
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signedness = "";
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tmptype = type_for_data_len( insn, 1/*signed*/ );
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signletter = "S";
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maximum = 0;
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maxsat = 0;
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minimum = 0;
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}
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printf(" int i;\n");
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printf(" for (i=0; i < %sS_IN_MMI_REGS; i++)\n", name );
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printf(" {\n");
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printf(" %s %s r = RS_%s%s(i) %s RT_%s%s(i);\n", signedness, tmptype, signletter, letter, op, signletter, letter );
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printf(" %s s = RS_%s%s(i);\n", tmptype, signletter, letter);
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printf(" %s t = RT_%s%s(i);\n", tmptype, signletter, letter);
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printf(" %s r = s %s t;\n", tmptype, op);
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if ( maximum )
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{
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printf(" if (r > %s) GPR_%s%s(destreg,i) = %s;\n", maximum, signletter, letter, maximum );
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printf(" if (r > %s)\n", maximum);
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printf(" GPR_%s%s(destreg,i) = %s;\n", signletter, letter, maxsat );
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if ( minimum )
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printf(" else if (r < %s) GPR_%s%s(destreg,i) = %s;\n", minimum, signletter, letter, minimum );
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printf(" else ");
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{
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printf(" else if (r < %s)\n", minimum);
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printf(" GPR_%s%s(destreg,i) = %s;\n", signletter, letter, minimum );
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}
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printf(" else\n");
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printf(" ");
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}
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printf(" GPR_%s%s(destreg,i) = r;\n", signletter, letter );
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printf(" }\n");
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@ -3433,53 +3441,65 @@ build_instruction (doisa, features, mips16, insn)
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{
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char* op;
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char* sign = (insn->flags & UNSIGNED) ? "U" : "S";
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char* prodtype = (insn->flags & UNSIGNED) ? "uword64" : "word64";
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char* prodtype = (insn->flags & UNSIGNED) ? "unsigned64" : "signed64";
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char* constructor = (insn->flags & UNSIGNED) ? "UWORD64" : "WORD64";
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printf("%s prod0;\n", prodtype );
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printf("%s prod1;\n", prodtype );
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if ( insn->flags & SUBTRACT )
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{
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op = "-";
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printf("prod0 = %s( HI_SW(0), LO_SW(0) );\n", constructor );
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printf("prod1 = %s( HI_SW(2), LO_SW(2) );\n", constructor );
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printf(" %s sum0 = %s( HI_SW(0), LO_SW(0) );\n", prodtype, constructor );
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printf(" %s sum1 = %s( HI_SW(2), LO_SW(2) );\n", prodtype, constructor );
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}
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else if ( insn->flags & ADDITION )
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{
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op = "+";
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printf("prod0 = %s( HI_SW(0), LO_SW(0) );\n", constructor );
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printf("prod1 = %s( HI_SW(2), LO_SW(2) );\n", constructor );
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printf(" %s sum0 = %s( HI_SW(0), LO_SW(0) );\n", prodtype, constructor );
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printf(" %s sum1 = %s( HI_SW(2), LO_SW(2) );\n", prodtype, constructor );
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}
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else
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{
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op = "";
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printf(" %s sum0 = 0;\n", prodtype );
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printf(" %s sum1 = 0;\n", prodtype );
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}
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printf("prod0 %s= (%s)RS_SW(0) * (%s)RT_SW(0);\n", op, prodtype, prodtype );
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printf("prod1 %s= (%s)RS_SW(2) * (%s)RT_SW(2);\n", op, prodtype, prodtype );
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printf(" %s prod0 = (%s)RS_%sW(0) * (%s)RT_%sW(0);\n", prodtype, prodtype, sign, prodtype, sign );
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printf(" %s prod1 = (%s)RS_%sW(2) * (%s)RT_%sW(2);\n", prodtype, prodtype, sign, prodtype, sign );
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printf("GPR_%sD(destreg,0) = prod0;\n", sign );
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printf("GPR_%sD(destreg,1) = prod1;\n", sign );
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printf(" sum0 %s= prod0;\n", op );
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printf(" sum1 %s= prod1;\n", op );
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printf("LO = SIGNEXTEND( prod0, 32 );\n");
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printf("HI = SIGNEXTEND( WORD64HI(prod0), 32 );\n");
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printf("LO1 = SIGNEXTEND( prod1, 32 );\n");
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printf("HI1 = SIGNEXTEND( WORD64HI(prod1), 32 );\n");
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printf(" GPR_%sD(destreg,0) = sum0;\n", sign );
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printf(" GPR_%sD(destreg,1) = sum1;\n", sign );
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printf(" LO = SIGNEXTEND( sum0, 32 );\n");
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printf(" HI = SIGNEXTEND( WORD64HI(sum0), 32 );\n");
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printf(" LO1 = SIGNEXTEND( sum1, 32 );\n");
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printf(" HI1 = SIGNEXTEND( WORD64HI(sum1), 32 );\n");
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break;
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}
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case PDIVW:
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{
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char* sign = (insn->flags & UNSIGNED) ? "U" : "S";
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printf("LO = RS_%sW(0) / RT_%sW(0);\n", sign, sign );
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printf("HI = RS_%sW(0) %% RT_%sW(0);\n", sign, sign );
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printf("LO1 = RS_%sW(2) / RT_%sW(2);\n", sign, sign );
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printf("HI1 = RS_%sW(2) %% RT_%sW(2);\n", sign, sign );
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int i;
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for (i = 0; i < 2; i ++)
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{
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char hi = (i == 0 ? ' ' : '1');
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int d = i * 2;
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printf("if (RT_UW(%d) != 0)\n", d );
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printf(" {\n");
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printf("LO%c = (signed32)(RS_%sW(%d) / RT_%sW(%d));\n", hi, sign, d, sign, d );
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printf("HI%c = (signed32)(RS_%sW(%d) %% RT_%sW(%d));\n", hi, sign, d, sign, d );
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printf(" }\n");
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}
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break;
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}
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case PDIVBW:
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printf("int devisor = RT_SH(0);\n");
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printf("signed32 devisor = RT_SH(0);\n");
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printf("if (devisor != 0)\n");
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printf(" {\n");
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printf(" LO_SW(0) = RS_SW(0) / devisor;\n");
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printf(" HI_SW(0) = SIGNEXTEND( (RS_SW(0) %% devisor), 16 );\n");
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printf(" LO_SW(1) = RS_SW(1) / devisor;\n");
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@ -3488,6 +3508,7 @@ build_instruction (doisa, features, mips16, insn)
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printf(" HI_SW(2) = SIGNEXTEND( (RS_SW(2) %% devisor), 16 );\n");
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printf(" LO_SW(3) = RS_SW(3) / devisor;\n");
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printf(" HI_SW(3) = SIGNEXTEND( (RS_SW(3) %% devisor), 16 );\n");
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printf(" }\n");
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break;
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case PADSBH:
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@ -3530,8 +3551,12 @@ build_instruction (doisa, features, mips16, insn)
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}
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case PSLLVW:
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printf("GPR_UD(destreg,0) = RT_UW(0) << (RS_UB(0) & 0x1F);\n");
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printf("GPR_UD(destreg,1) = RT_UW(2) << (RS_UB(8) & 0x1F);\n");
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printf("int s0 = (RS_UB(0) & 0x1F);\n");
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printf("int s1 = (RS_UB(8) & 0x1F);\n");
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printf("signed32 temp0 = RT_UW(0) << s0;\n");
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printf("signed32 temp1 = RT_UW(2) << s1;\n");
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printf("GPR_SD(destreg,0) = (signed64)temp0;\n");
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printf("GPR_SD(destreg,1) = (signed64)temp1;\n");
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break;
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case PSRLVW:
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@ -3876,13 +3901,29 @@ build_instruction (doisa, features, mips16, insn)
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printf(" }\n");
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printf("else if (op1 == 2)\n");
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printf(" {\n");
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printf(" unsigned long long t = ((uword64)HI_UW(0) << 32) | (uword64)LO_UW(0);\n");
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printf(" if ( t > 0x7FFFFFFF )\n");
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printf(" GPR_SD(destreg,0) = 0x7FFFFFFF;\n");
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printf(" else if ( t > (uword64)0xFFFFFFFF80000000LL )\n");
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printf(" GPR_SD(destreg,0) = (uword64)0xFFFFFFFF80000000LL;\n");
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printf(" /* NOTE: This code implements a saturate according to the\n");
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printf(" figure on page B-115 and not according to the\n");
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printf(" definition on page B-113 */\n");
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printf(" signed64 t = ((unsigned64)HI_UW(0) << 32) | (unsigned64)LO_UW(0);\n");
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printf(" signed64 u = ((unsigned64)HI_UW(2) << 32) | (unsigned64)LO_UW(2);\n");
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printf(" signed64 x000000007FFFFFFF = LSMASK64 (31);\n");
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printf(" signed64 xFFFFFFFF80000000 = MSMASK64 (33);\n");
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printf(" signed64 x7FFFFFFFFFFFFFFF = LSMASK64 (63);\n");
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printf(" signed64 x8000000000000000 = MSMASK64 (1);\n");
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printf(" signed64 x0000000080000000 = x000000007FFFFFFF + 1;\n");
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printf(" signed64 minus0000000080000000 = -x0000000080000000;\n");
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printf(" if ( t > x000000007FFFFFFF )\n");
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printf(" GPR_SD(destreg,0) = x000000007FFFFFFF;\n");
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printf(" else if ( t < minus0000000080000000 )\n");
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printf(" GPR_SD(destreg,0) = minus0000000080000000;\n");
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printf(" else\n");
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printf(" GPR_SD(destreg,0) = SIGNEXTEND(t,32);\n");
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printf(" GPR_SD(destreg,0) = t;\n");
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printf(" if ( u > x000000007FFFFFFF )\n");
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printf(" GPR_SD(destreg,1) = x000000007FFFFFFF;\n");
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printf(" else if ( u < minus0000000080000000 )\n");
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printf(" GPR_SD(destreg,1) = minus0000000080000000;\n");
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printf(" else\n");
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printf(" GPR_SD(destreg,1) = u;\n");
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printf(" }\n");
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printf("else if (op1 == 3)\n");
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printf(" {\n");
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@ -3897,58 +3938,58 @@ build_instruction (doisa, features, mips16, insn)
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printf(" }\n");
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printf("else if (op1 == 4)\n");
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printf(" {\n");
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printf(" if (LO_UW(0) > 0x00007FFF)\n");
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printf(" if (LO_SW(0) > 0x7FFF)\n");
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printf(" GPR_UH(destreg,0) = 0x7FFF;\n");
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printf(" else if (LO_UW(0) >= 0xFFFF8000)\n");
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printf(" else if (LO_SW(0) < -0x8000)\n");
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printf(" GPR_UH(destreg,0) = 0x8000;\n");
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printf(" else\n");
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printf(" GPR_UH(destreg,0) = LO_UH(0);\n");
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printf(" if (LO_UW(1) > 0x00007FFF)\n");
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printf(" if (LO_SW(1) > 0x7FFF)\n");
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printf(" GPR_UH(destreg,1) = 0x7FFF;\n");
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printf(" else if (LO_UW(1) >= 0xFFFF8000)\n");
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printf(" else if (LO_SW(1) < -0x8000)\n");
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printf(" GPR_UH(destreg,1) = 0x8000;\n");
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printf(" else\n");
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printf(" GPR_UH(destreg,1) = LO_UH(2);\n");
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printf(" if (HI_UW(0) > 0x00007FFF)\n");
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printf(" GPR_UH(destreg,0) = 0x7FFF;\n");
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printf(" else if (HI_UW(0) >= 0xFFFF8000)\n");
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printf(" GPR_UH(destreg,0) = 0x8000;\n");
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printf(" if (HI_SW(0) > 0x7FFF)\n");
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printf(" GPR_UH(destreg,2) = 0x7FFF;\n");
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printf(" else if (HI_SW(0) < -0x8000)\n");
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printf(" GPR_UH(destreg,2) = 0x8000;\n");
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printf(" else\n");
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printf(" GPR_UH(destreg,0) = HI_UH(0);\n");
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printf(" GPR_UH(destreg,2) = HI_UH(0);\n");
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printf(" if (HI_UW(1) > 0x00007FFF)\n");
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printf(" GPR_UH(destreg,1) = 0x7FFF;\n");
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printf(" else if (HI_UW(1) >= 0xFFFF8000)\n");
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printf(" GPR_UH(destreg,1) = 0x8000;\n");
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printf(" if (HI_SW(1) > 0x7FFF)\n");
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printf(" GPR_UH(destreg,3) = 0x7FFF;\n");
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printf(" else if (HI_SW(1) < -0x8000)\n");
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printf(" GPR_UH(destreg,3) = 0x8000;\n");
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printf(" else\n");
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printf(" GPR_UH(destreg,1) = HI_UH(2);\n");
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printf(" GPR_UH(destreg,3) = HI_UH(2);\n");
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printf(" if (LO_UW(2) > 0x00007FFF)\n");
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printf(" if (LO_SW(2) > 0x7FFF)\n");
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printf(" GPR_UH(destreg,4) = 0x7FFF;\n");
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printf(" else if (LO_UW(2) >= 0xFFFF8000)\n");
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printf(" else if (LO_SW(2) < -0x8000)\n");
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printf(" GPR_UH(destreg,4) = 0x8000;\n");
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printf(" else\n");
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printf(" GPR_UH(destreg,4) = LO_UH(4);\n");
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printf(" if (LO_UW(3) > 0x00007FFF)\n");
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printf(" if (LO_SW(3) > 0x7FFF)\n");
|
||||
printf(" GPR_UH(destreg,5) = 0x7FFF;\n");
|
||||
printf(" else if (LO_UW(3) >= 0xFFFF8000)\n");
|
||||
printf(" else if (LO_SW(3) < -0x8000)\n");
|
||||
printf(" GPR_UH(destreg,5) = 0x8000;\n");
|
||||
printf(" else\n");
|
||||
printf(" GPR_UH(destreg,5) = LO_UH(6);\n");
|
||||
|
||||
printf(" if (HI_UW(2) > 0x00007FFF)\n");
|
||||
printf(" if (HI_SW(2) > 0x7FFF)\n");
|
||||
printf(" GPR_UH(destreg,6) = 0x7FFF;\n");
|
||||
printf(" else if (HI_UW(2) >= 0xFFFF8000)\n");
|
||||
printf(" else if (HI_SW(2) < -0x8000)\n");
|
||||
printf(" GPR_UH(destreg,6) = 0x8000;\n");
|
||||
printf(" else\n");
|
||||
printf(" GPR_UH(destreg,6) = HI_UH(4);\n");
|
||||
|
||||
printf(" if (HI_UW(3) > 0x00007FFF)\n");
|
||||
printf(" if (HI_SW(3) > 0x7FFF)\n");
|
||||
printf(" GPR_UH(destreg,7) = 0x7FFF;\n");
|
||||
printf(" else if (HI_UW(3) >= 0xFFFF8000)\n");
|
||||
printf(" else if (HI_SW(3) < -0x8000)\n");
|
||||
printf(" GPR_UH(destreg,7) = 0x8000;\n");
|
||||
printf(" else\n");
|
||||
printf(" GPR_UH(destreg,7) = HI_UH(6);\n");
|
||||
@ -3981,7 +4022,7 @@ build_instruction (doisa, features, mips16, insn)
|
||||
printf("int i;\n");
|
||||
printf("for(i=0;i<WORDS_IN_MMI_REGS;i++)\n");
|
||||
printf(" {\n");
|
||||
printf(" int x = RT_UW(i);\n");
|
||||
printf(" unsigned32 x = RT_UW(i);\n");
|
||||
printf(" GPR_UW(destreg,i) = ((x & (1 << 15)) << (31 - 15)) \n");
|
||||
printf(" | ((x & (31 << 10)) << (19 - 10)) \n");
|
||||
printf(" | ((x & (31 << 5)) << (11 - 5)) \n");
|
||||
@ -3993,7 +4034,7 @@ build_instruction (doisa, features, mips16, insn)
|
||||
printf("int i;\n");
|
||||
printf("for(i=0;i<WORDS_IN_MMI_REGS;i++)\n");
|
||||
printf(" {\n");
|
||||
printf(" int x = RT_UW(i);\n");
|
||||
printf(" unsigned32 x = RT_UW(i);\n");
|
||||
printf(" GPR_UW(destreg,i) = ((x & (1 << 31)) >> (31 - 15)) \n");
|
||||
printf(" | ((x & (31 << 19)) >> (19 - 10)) \n");
|
||||
printf(" | ((x & (31 << 11)) >> (11 - 5)) \n");
|
||||
|
||||
Loading…
Reference in New Issue
Block a user