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| author | Eric Botcazou <ebotcazou@adacore.com> | 2019-09-02 10:10:23 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2019-09-02 10:10:23 +0000 |
| commit | 000a5f8d23c04cc52f265519fccf37c81b5a0bad (patch) | |
| tree | f8632068beccb97b70158fa5eb8381b41872c683 /gcc/rtl.def | |
| parent | 976f9aa1e8b30112c0932b761e815cafcc69641f (diff) | |
| download | gcc-000a5f8d23c04cc52f265519fccf37c81b5a0bad.zip gcc-000a5f8d23c04cc52f265519fccf37c81b5a0bad.tar.gz gcc-000a5f8d23c04cc52f265519fccf37c81b5a0bad.tar.bz2 | |
re PR target/91323 (LTGT rtx produces UCOMISS instead of COMISS)
PR target/91323
* doc/generic.texi (LTGT_EXPR): Merge with other comparison operators.
* rtl.def (LTGT): Likewise. Add note about floating-point exceptions.
* tree.def (LTGT_EXPR): Likewise.
* config/sparc/sparc.c (select_cc_mode): Return CCFPEmode for LTGT.
From-SVN: r275303
Diffstat (limited to 'gcc/rtl.def')
| -rw-r--r-- | gcc/rtl.def | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/gcc/rtl.def b/gcc/rtl.def index 63b09b3..c756af8 100644 --- a/gcc/rtl.def +++ b/gcc/rtl.def @@ -552,20 +552,25 @@ DEF_RTL_EXPR(POST_INC, "post_inc", "e", RTX_AUTOINC) DEF_RTL_EXPR(PRE_MODIFY, "pre_modify", "ee", RTX_AUTOINC) DEF_RTL_EXPR(POST_MODIFY, "post_modify", "ee", RTX_AUTOINC) -/* Comparison operations. The ordered comparisons exist in two - flavors, signed and unsigned. */ +/* Comparison operations. The first 6 are allowed only for integral, +floating-point and vector modes. LTGT is only allowed for floating-point +modes. The last 4 are allowed only for integral and vector modes. +For floating-point operations, if either operand is a NaN, then NE returns +true and the remaining operations return false. The operations other than +EQ and NE may generate an exception on quiet NaNs. */ DEF_RTL_EXPR(NE, "ne", "ee", RTX_COMM_COMPARE) DEF_RTL_EXPR(EQ, "eq", "ee", RTX_COMM_COMPARE) DEF_RTL_EXPR(GE, "ge", "ee", RTX_COMPARE) DEF_RTL_EXPR(GT, "gt", "ee", RTX_COMPARE) DEF_RTL_EXPR(LE, "le", "ee", RTX_COMPARE) DEF_RTL_EXPR(LT, "lt", "ee", RTX_COMPARE) +DEF_RTL_EXPR(LTGT, "ltgt", "ee", RTX_COMM_COMPARE) DEF_RTL_EXPR(GEU, "geu", "ee", RTX_COMPARE) DEF_RTL_EXPR(GTU, "gtu", "ee", RTX_COMPARE) DEF_RTL_EXPR(LEU, "leu", "ee", RTX_COMPARE) DEF_RTL_EXPR(LTU, "ltu", "ee", RTX_COMPARE) -/* Additional floating point unordered comparison flavors. */ +/* Additional floating-point unordered comparison flavors. */ DEF_RTL_EXPR(UNORDERED, "unordered", "ee", RTX_COMM_COMPARE) DEF_RTL_EXPR(ORDERED, "ordered", "ee", RTX_COMM_COMPARE) @@ -576,9 +581,6 @@ DEF_RTL_EXPR(UNGT, "ungt", "ee", RTX_COMPARE) DEF_RTL_EXPR(UNLE, "unle", "ee", RTX_COMPARE) DEF_RTL_EXPR(UNLT, "unlt", "ee", RTX_COMPARE) -/* This is an ordered NE, ie !UNEQ, ie false for NaN. */ -DEF_RTL_EXPR(LTGT, "ltgt", "ee", RTX_COMM_COMPARE) - /* Represents the result of sign-extending the sole operand. The machine modes of the operand and of the SIGN_EXTEND expression determine how much sign-extension is going on. */ |