Attachment #205198 for bug #270120

Lines 682-688 enum target_cpu_default Link Here

(-)a/gcc/config/i386/i386.h (-1 / +3 lines)
682	need a 16-byte aligned stack, as required by SSE instructions. If	682	need a 16-byte aligned stack, as required by SSE instructions. If
683	STACK_REALIGN_DEFAULT is 1 and PREFERRED_STACK_BOUNDARY_DEFAULT is	683	STACK_REALIGN_DEFAULT is 1 and PREFERRED_STACK_BOUNDARY_DEFAULT is
684	128, stacks for all functions may be realigned. */	684	128, stacks for all functions may be realigned. */
685	#define STACK_REALIGN_DEFAULT 0	685	/* FIXME: I have no installed 3DNOW cpu to test */
		686	#define STACK_REALIGN_DEFAULT \
		687	(((TARGET_SSE \|\| TARGET_3DNOW) && !TARGET_64BIT) ? 1 : 0)
686		688
687	/* Boundary (in bits) on which the incoming stack is aligned. */	689	/* Boundary (in bits) on which the incoming stack is aligned. */
688	#define INCOMING_STACK_BOUNDARY ix86_incoming_stack_boundary	690	#define INCOMING_STACK_BOUNDARY ix86_incoming_stack_boundary

Lines 11-13 i386-c.o: $(srcdir)/config/i386/i386-c.c Link Here

(-)a/gcc/config/i386/t-i386 (+6 lines)
11	$(TM_H) $(RTL_H) $(TREE_H) $(TM_P_H) $(FLAGS_H) $(C_COMMON_H) $(GGC_H) \	11	$(TM_H) $(RTL_H) $(TREE_H) $(TM_P_H) $(FLAGS_H) $(C_COMMON_H) $(GGC_H) \
12	$(TARGET_H) $(TARGET_DEF_H) $(CPPLIB_H) $(C_PRAGMA_H)	12	$(TARGET_H) $(TARGET_DEF_H) $(CPPLIB_H) $(C_PRAGMA_H)
13	$(CC) -c $(ALL_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $(srcdir)/config/i386/i386-c.c	13	$(CC) -c $(ALL_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $(srcdir)/config/i386/i386-c.c
		14
		15	TARGET_LIBGCC2_CFLAGS += -mno-stackrealign
		16
		17	# try if segfault to disable sse in gcc libs
		18	#TARGET_LIBGCC2_CFLAGS += -mno-sse -mno-3dnow
		19

Lines 10346-10351 runtime stack if necessary. This suppor Link Here

(-)a/gcc/doc/g++.1 (+1 lines)
10346	a 4\-byte aligned stack with modern codes that keep a 16\-byte stack for	10346	a 4\-byte aligned stack with modern codes that keep a 16\-byte stack for
10347	\&\s-1SSE\s0 compatibility. See also the attribute \f(CW\(C`force_align_arg_pointer\(C'\fR,	10347	\&\s-1SSE\s0 compatibility. See also the attribute \f(CW\(C`force_align_arg_pointer\(C'\fR,
10348	applicable to individual functions.	10348	applicable to individual functions.
		10349	It is enabled by default at SSE on 32bit.
10349	.IP "\fB\-mpreferred\-stack\-boundary=\fR\fInum\fR" 4	10350	.IP "\fB\-mpreferred\-stack\-boundary=\fR\fInum\fR" 4
10350	.IX Item "-mpreferred-stack-boundary=num"	10351	.IX Item "-mpreferred-stack-boundary=num"
10351	Attempt to keep the stack boundary aligned to a 2 raised to \fInum\fR	10352	Attempt to keep the stack boundary aligned to a 2 raised to \fInum\fR

Lines 10346-10351 runtime stack if necessary. This suppor Link Here

(-)a/gcc/doc/gcc.1 (+1 lines)
10346	a 4\-byte aligned stack with modern codes that keep a 16\-byte stack for	10346	a 4\-byte aligned stack with modern codes that keep a 16\-byte stack for
10347	\&\s-1SSE\s0 compatibility. See also the attribute \f(CW\(C`force_align_arg_pointer\(C'\fR,	10347	\&\s-1SSE\s0 compatibility. See also the attribute \f(CW\(C`force_align_arg_pointer\(C'\fR,
10348	applicable to individual functions.	10348	applicable to individual functions.
		10349	It is enabled by default at SSE on 32bit.
10349	.IP "\fB\-mpreferred\-stack\-boundary=\fR\fInum\fR" 4	10350	.IP "\fB\-mpreferred\-stack\-boundary=\fR\fInum\fR" 4
10350	.IX Item "-mpreferred-stack-boundary=num"	10351	.IX Item "-mpreferred-stack-boundary=num"
10351	Attempt to keep the stack boundary aligned to a 2 raised to \fInum\fR	10352	Attempt to keep the stack boundary aligned to a 2 raised to \fInum\fR

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