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tcg-arm: Simplify logic in detecting the ARM ISA in use

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GCC 4.8 defines a handy __ARM_ARCH symbol that we can use, which
will make us nicely forward compatible with ARMv8 AArch32.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2013-06-06 10:21:37 -07:00
parent fb82273851
commit cb91021a47
1 changed files with 23 additions and 39 deletions
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62
tcg/arm/tcg-target.c
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@ -22,50 +22,34 @@
* THE SOFTWARE.
*/
#if defined(__ARM_ARCH_7__) || \
defined(__ARM_ARCH_7A__) || \
defined(__ARM_ARCH_7EM__) || \
defined(__ARM_ARCH_7M__) || \
defined(__ARM_ARCH_7R__)
#define USE_ARMV7_INSTRUCTIONS
/* The __ARM_ARCH define is provided by gcc 4.8. Construct it otherwise. */
#ifndef __ARM_ARCH
# if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \
|| defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \
|| defined(__ARM_ARCH_7EM__)
# define __ARM_ARCH 7
# elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
|| defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) \
|| defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__)
# define __ARM_ARCH 6
# elif defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5E__) \
|| defined(__ARM_ARCH_5T__) || defined(__ARM_ARCH_5TE__) \
|| defined(__ARM_ARCH_5TEJ__)
# define __ARM_ARCH 5
# else
# define __ARM_ARCH 4
# endif
#endif
#if defined(USE_ARMV7_INSTRUCTIONS) || \
defined(__ARM_ARCH_6J__) || \
defined(__ARM_ARCH_6K__) || \
defined(__ARM_ARCH_6T2__) || \
defined(__ARM_ARCH_6Z__) || \
defined(__ARM_ARCH_6ZK__)
#define USE_ARMV6_INSTRUCTIONS
#endif
#if defined(USE_ARMV6_INSTRUCTIONS) || \
defined(__ARM_ARCH_5T__) || \
defined(__ARM_ARCH_5TE__) || \
defined(__ARM_ARCH_5TEJ__)
#define USE_ARMV5T_INSTRUCTIONS
#endif
#ifdef USE_ARMV5T_INSTRUCTIONS
static const int use_armv5t_instructions = 1;
#if defined(__ARM_ARCH_5T__) \
|| defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5TEJ__)
# define use_armv5t_instructions 1
#else
static const int use_armv5t_instructions = 0;
# define use_armv5t_instructions use_armv6_instructions
#endif
#undef USE_ARMV5_INSTRUCTIONS
#ifdef USE_ARMV6_INSTRUCTIONS
static const int use_armv6_instructions = 1;
#else
static const int use_armv6_instructions = 0;
#endif
#undef USE_ARMV6_INSTRUCTIONS
#ifdef USE_ARMV7_INSTRUCTIONS
static const int use_armv7_instructions = 1;
#else
static const int use_armv7_instructions = 0;
#endif
#undef USE_ARMV7_INSTRUCTIONS
#define use_armv6_instructions (__ARM_ARCH >= 6)
#define use_armv7_instructions (__ARM_ARCH >= 7)
#ifndef use_idiv_instructions
bool use_idiv_instructions;