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| author | Jim Wilson <wilson@cygnus.com> | 1998-05-05 00:40:04 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-05-04 18:40:04 -0600 |
| commit | 56ef4295eb2e223d89bb4e13bb47cf910b4a3a27 (patch) | |
| tree | a141fd71e40032b0d8d1cb98a140dfc6ff8f99bd | |
| parent | 552a1e5915b3e05ee0f5126dc2b954ca79af17a4 (diff) | |
| download | gcc-56ef4295eb2e223d89bb4e13bb47cf910b4a3a27.zip gcc-56ef4295eb2e223d89bb4e13bb47cf910b4a3a27.tar.gz gcc-56ef4295eb2e223d89bb4e13bb47cf910b4a3a27.tar.bz2 | |
i386.c (output_fix_trunc): Add code to emulate non-popping DImode case.
* i386.c (output_fix_trunc): Add code to emulate non-popping DImode
case.
Regression fix from Jim.
From-SVN: r19537
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 14 |
2 files changed, 17 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index a0777b1..1355e68 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Thu Apr 30 19:28:16 1998 Jim Wilson <wilson@cygnus.com> + + * i386.c (output_fix_trunc): Add code to emulate non-popping DImode + case. + Thu Apr 23 01:41:02 1998 Jeffrey A Law (law@cygnus.com) * version.c: Bump for 1.0.3 pre-release. diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index b9b7e5d..8be76dc 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -3731,8 +3731,7 @@ output_fix_trunc (insn, operands) int stack_top_dies = find_regno_note (insn, REG_DEAD, FIRST_STACK_REG) != 0; rtx xops[2]; - if (! STACK_TOP_P (operands[1]) || - (GET_MODE (operands[0]) == DImode && ! stack_top_dies)) + if (! STACK_TOP_P (operands[1])) abort (); xops[0] = GEN_INT (12); @@ -3750,6 +3749,17 @@ output_fix_trunc (insn, operands) { if (stack_top_dies) output_asm_insn (AS1 (fistp%z0,%0), operands); + else if (GET_MODE (operands[0]) == DImode && ! stack_top_dies) + { + /* There is no DImode version of this without a stack pop, so + we must emulate it. It doesn't matter much what the second + instruction is, because the value being pushed on the FP stack + is not used except for the following stack popping store. + This case can only happen without optimization, so it doesn't + matter that it is inefficient. */ + output_asm_insn (AS1 (fistp%z0,%0), operands); + output_asm_insn (AS1 (fild%z0,%0), operands); + } else output_asm_insn (AS1 (fist%z0,%0), operands); } |