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re PR target/27968 (gcc emits (undefined) ffreep opcode which is not understood by Solaris' /usr/ccs/bin/as when tuning for Athlon or Opteron CPUs)
PR target/27968 * configure.ac (HAVE_AS_IX86_FFREEP): On x86 targets check whether the configured assembler supports the x87's ffreep mnemonic. * configure: Regenerate. * config.in: Regenerate. * config/i386/i386.c (output_387_ffreep): New function. (output_fp_compare): Use output_387_ffreep to emit ffreep insns. (output_387_reg_move): Likewise. From-SVN: r115237
This commit is contained in:
Roger Sayle
parent
33251a2dc3
commit
b6c03bcd80
gcc
@ -1,3 +1,15 @@
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2006-07-06 Roger Sayle <roger@eyesopen.com>
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PR target/27968
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* configure.ac (HAVE_AS_IX86_FFREEP): On x86 targets check whether
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the configured assembler supports the x87's ffreep mnemonic.
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* configure: Regenerate.
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* config.in: Regenerate.
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* config/i386/i386.c (output_387_ffreep): New function.
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(output_fp_compare): Use output_387_ffreep to emit ffreep insns.
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(output_387_reg_move): Likewise.
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2006-07-06 Paul Eggert <eggert@cs.ucla.edu>
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Port to hosts whose 'sort' and 'tail' implementations
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@ -10,7 +22,8 @@
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2006-07-06 Zdenek Dvorak <dvorakz@suse.cz>
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* tree-ssa-loop-niter.c (scev_probably_wraps_p): Fix typo in argument name.
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* tree-ssa-loop-niter.c (scev_probably_wraps_p): Fix typo in
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argument name.
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2006-07-06 David Edelsohn <edelsohn@gnu.org>
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@ -203,6 +203,12 @@
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#endif
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/* Define if your assembler supports the ffreep mnemonic. */
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#ifndef USED_FOR_TARGET
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#undef HAVE_AS_IX86_FFREEP
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#endif
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/* Define if your assembler supports the lituse_jsrdirect relocation. */
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#ifndef USED_FOR_TARGET
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#undef HAVE_AS_JSRDIRECT_RELOCS
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@ -8641,6 +8641,34 @@ output_fix_trunc (rtx insn, rtx *operands, int fisttp)
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return "";
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}
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/* Output code for x87 ffreep insn. The OPNO argument, which may only
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have the values zero or one, indicates the ffreep insn's operand
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from the OPERANDS array. */
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static const char *
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output_387_ffreep (rtx *operands ATTRIBUTE_UNUSED, int opno)
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{
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if (TARGET_USE_FFREEP)
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#if HAVE_AS_IX86_FFREEP
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return opno ? "ffreep\t%y1" : "ffreep\t%y0";
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#else
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switch (REGNO (operands[opno]))
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{
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case FIRST_STACK_REG + 0: return ".word\t0xc0df";
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case FIRST_STACK_REG + 1: return ".word\t0xc1df";
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case FIRST_STACK_REG + 2: return ".word\t0xc2df";
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case FIRST_STACK_REG + 3: return ".word\t0xc3df";
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case FIRST_STACK_REG + 4: return ".word\t0xc4df";
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case FIRST_STACK_REG + 5: return ".word\t0xc5df";
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case FIRST_STACK_REG + 6: return ".word\t0xc6df";
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case FIRST_STACK_REG + 7: return ".word\t0xc7df";
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}
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#endif
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return opno ? "fstp\t%y1" : "fstp\t%y0";
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}
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/* Output code for INSN to compare OPERANDS. EFLAGS_P is 1 when fcomi
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should be used. UNORDERED_P is true when fucom should be used. */
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@ -8685,7 +8713,7 @@ output_fp_compare (rtx insn, rtx *operands, int eflags_p, int unordered_p)
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if (stack_top_dies)
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{
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output_asm_insn ("ftst\n\tfnstsw\t%0", operands);
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return TARGET_USE_FFREEP ? "ffreep\t%y1" : "fstp\t%y1";
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return output_387_ffreep (operands, 1);
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}
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else
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return "ftst\n\tfnstsw\t%0";
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@ -8708,7 +8736,7 @@ output_fp_compare (rtx insn, rtx *operands, int eflags_p, int unordered_p)
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output_asm_insn ("fucomip\t{%y1, %0|%0, %y1}", operands);
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else
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output_asm_insn ("fcomip\t{%y1, %0|%0, %y1}", operands);
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return TARGET_USE_FFREEP ? "ffreep\t%y0" : "fstp\t%y0";
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return output_387_ffreep (operands, 0);
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}
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else
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{
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@ -18807,9 +18835,8 @@ output_387_reg_move (rtx insn, rtx *operands)
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if (REG_P (operands[1])
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&& find_regno_note (insn, REG_DEAD, REGNO (operands[1])))
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{
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if (REGNO (operands[0]) == FIRST_STACK_REG
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&& TARGET_USE_FFREEP)
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return "ffreep\t%y0";
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if (REGNO (operands[0]) == FIRST_STACK_REG)
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return output_387_ffreep (operands, 0);
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return "fstp\t%y0";
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}
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if (STACK_TOP_P (operands[0]))
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33
gcc/configure
vendored
33
gcc/configure
vendored
@ -15046,6 +15046,39 @@ cat >>confdefs.h <<\_ACEOF
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#define HAVE_AS_IX86_CMOV_SUN_SYNTAX 1
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_ACEOF
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fi
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echo "$as_me:$LINENO: checking assembler for ffreep mnemonic" >&5
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echo $ECHO_N "checking assembler for ffreep mnemonic... $ECHO_C" >&6
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if test "${gcc_cv_as_ix86_ffreep+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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gcc_cv_as_ix86_ffreep=no
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if test x$gcc_cv_as != x; then
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echo 'ffreep %st(1)' > conftest.s
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if { ac_try='$gcc_cv_as -o conftest.o conftest.s >&5'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }
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then
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gcc_cv_as_ix86_ffreep=yes
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else
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echo "configure: failed program was" >&5
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cat conftest.s >&5
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fi
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rm -f conftest.o conftest.s
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fi
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fi
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echo "$as_me:$LINENO: result: $gcc_cv_as_ix86_ffreep" >&5
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echo "${ECHO_T}$gcc_cv_as_ix86_ffreep" >&6
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if test $gcc_cv_as_ix86_ffreep = yes; then
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_AS_IX86_FFREEP 1
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_ACEOF
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fi
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# This one is used unconditionally by i386.[ch]; it is to be defined
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@ -1,7 +1,7 @@
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# configure.ac for GCC
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# Process this file with autoconf to generate a configuration script.
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# Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
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# Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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# Free Software Foundation, Inc.
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#This file is part of GCC.
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@ -2815,6 +2815,12 @@ foo: nop
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[AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
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[Define if your assembler supports the Sun syntax for cmov.])])
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gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
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gcc_cv_as_ix86_ffreep,,,
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[ffreep %st(1)],,
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[AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
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[Define if your assembler supports the ffreep mnemonic.])])
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# This one is used unconditionally by i386.[ch]; it is to be defined
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# to 1 if the feature is present, 0 otherwise.
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gcc_GAS_CHECK_FEATURE([GOTOFF in data],
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