No functional changes.
2019-02-15 Uroš Bizjak <ubiz...@gmail.com>
* config/i386/i386.h (TARGET_SUBTARGET64_ISA_DEFAULT):
Enable MMX, SSE and SSE2 by default.
* config/i386/i386.c (ix86_option_override_internal): Do not
explicitly set MMX, SSE and SSE2 flags for TARGET_64BIT here.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
Committed to mainline SVN.
Uros.
Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c (revision 268907)
+++ config/i386/i386.c (working copy)
@@ -4165,14 +4165,9 @@ ix86_option_override_internal (bool main_args_p,
opts->x_target_flags
|= TARGET_SUBTARGET64_DEFAULT & ~opts_set->x_target_flags;
- /* Enable by default the SSE and MMX builtins. Do allow the user to
- explicitly disable any of these. In particular, disabling SSE and
- MMX for kernel code is extremely useful. */
if (!ix86_arch_specified)
- opts->x_ix86_isa_flags
- |= ((OPTION_MASK_ISA_SSE2 | OPTION_MASK_ISA_SSE | OPTION_MASK_ISA_MMX
- | TARGET_SUBTARGET64_ISA_DEFAULT)
- & ~opts->x_ix86_isa_flags_explicit);
+ opts->x_ix86_isa_flags
+ |= TARGET_SUBTARGET64_ISA_DEFAULT & ~opts->x_ix86_isa_flags_explicit;
if (TARGET_RTD_P (opts->x_target_flags))
warning (0,
Index: config/i386/i386.h
===================================================================
--- config/i386/i386.h (revision 268907)
+++ config/i386/i386.h (working copy)
@@ -633,7 +633,9 @@ extern tree x86_mfence;
/* Extra bits to force on w/ 64-bit mode. */
#define TARGET_SUBTARGET64_DEFAULT 0
-#define TARGET_SUBTARGET64_ISA_DEFAULT 0
+/* Enable MMX, SSE and SSE2 by default. */
+#define TARGET_SUBTARGET64_ISA_DEFAULT \
+ (OPTION_MASK_ISA_MMX | OPTION_MASK_ISA_SSE | OPTION_MASK_ISA_SSE2)
/* Replace MACH-O, ifdefs by in-line tests, where possible.
(a) Macros defined in config/i386/darwin.h */
