* i386: Reject -m96bit-long-double for 64bit targets [PR100041]
@ 2021-04-23 16:47 Uros Bizjak
0 siblings, 0 replies; only message in thread
From: Uros Bizjak @ 2021-04-23 16:47 UTC (permalink / raw)
To: gcc-patches
[-- Attachment #1: Type: text/plain, Size: 764 bytes --]
64bit targets default to 128bit long double, so -m96bit-long-double should
not be used. Together with -m128bit-long-double, this option was intended
to be an optimization for 32bit targets only.
Error out when -m96bit-long-double is used with 64bit targets.
2021-04-23 Uroš Bizjak <ubizjak@gmail.com>
gcc/
PR target/100041
* config/i386/i386-options.c (ix86_option_override_internal):
Error out when -m96bit-long-double is used with 64bit targets.
* config/i386/i386.md (*pushxf_rounded): Remove pattern.
gcc/testsuite/
PR target/100041
* gcc.target/i386/pr79514.c (dg-error):
Expect error for 64bit targets.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
Pushed to mainline.
Uros.
[-- Attachment #2: p.diff.txt --]
[-- Type: text/plain, Size: 2326 bytes --]
diff --git a/gcc/config/i386/i386-options.c b/gcc/config/i386/i386-options.c
index 91da2849c49..b1059c77b6b 100644
--- a/gcc/config/i386/i386-options.c
+++ b/gcc/config/i386/i386-options.c
@@ -2557,6 +2557,9 @@ ix86_option_override_internal (bool main_args_p,
opts->x_ix86_isa_flags
|= TARGET_SUBTARGET64_ISA_DEFAULT & ~opts->x_ix86_isa_flags_explicit;
+ if (!TARGET_128BIT_LONG_DOUBLE_P (opts->x_target_flags))
+ error ("%<-m96bit-long-double%> is not compatible with this target");
+
if (TARGET_RTD_P (opts->x_target_flags))
warning (0,
main_args_p
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 9ff35d9a607..9e9dce6d433 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -3044,36 +3044,6 @@
operands[0] = replace_equiv_address (operands[0], stack_pointer_rtx);
})
-(define_insn_and_split "*pushxf_rounded"
- [(set (mem:XF
- (pre_modify:P
- (reg:P SP_REG)
- (plus:P (reg:P SP_REG) (const_int -16))))
- (match_operand:XF 0 "nonmemory_no_elim_operand" "f,r,*r,C"))]
- "TARGET_64BIT"
- "#"
- "&& 1"
- [(set (reg:P SP_REG) (plus:P (reg:P SP_REG) (const_int -16)))
- (set (match_dup 1) (match_dup 0))]
-{
- rtx pat = PATTERN (curr_insn);
- operands[1] = SET_DEST (pat);
-
- /* Preserve memory attributes. */
- operands[1] = replace_equiv_address (operands[1], stack_pointer_rtx);
-}
- [(set_attr "type" "multi")
- (set_attr "unit" "i387,*,*,*")
- (set (attr "mode")
- (cond [(eq_attr "alternative" "1,2,3")
- (const_string "DI")
- ]
- (const_string "XF")))
- (set (attr "preferred_for_size")
- (cond [(eq_attr "alternative" "1")
- (symbol_ref "false")]
- (symbol_ref "true")))])
-
(define_insn "*pushxf"
[(set (match_operand:XF 0 "push_operand" "=<,<,<,<,<")
(match_operand:XF 1 "general_no_elim_operand" "f,r,*r,oF,oC"))]
diff --git a/gcc/testsuite/gcc.target/i386/pr79514.c b/gcc/testsuite/gcc.target/i386/pr79514.c
index c5b7bf8ef67..8235da6e14c 100644
--- a/gcc/testsuite/gcc.target/i386/pr79514.c
+++ b/gcc/testsuite/gcc.target/i386/pr79514.c
@@ -1,6 +1,7 @@
/* PR target/79514 */
/* { dg-do compile } */
/* { dg-options "-m96bit-long-double" } */
+/* { dg-error "'-m96bit-long-double' is not compatible" "" { target { ! ia32 } } 0 } */
extern void bar (long double);
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2021-04-23 16:47 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-23 16:47 i386: Reject -m96bit-long-double for 64bit targets [PR100041] Uros Bizjak
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).