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linux/arch/mips/include/asm/cpu-features.h
Zhaoxiu Zeng fff7fb0b2d lib/GCD.c: use binary GCD algorithm instead of Euclidean 
The binary GCD algorithm is based on the following facts:
	1. If a and b are all evens, then gcd(a,b) = 2 * gcd(a/2, b/2)
	2. If a is even and b is odd, then gcd(a,b) = gcd(a/2, b)
	3. If a and b are all odds, then gcd(a,b) = gcd((a-b)/2, b) = gcd((a+b)/2, b)

Even on x86 machines with reasonable division hardware, the binary
algorithm runs about 25% faster (80% the execution time) than the
division-based Euclidian algorithm.

On platforms like Alpha and ARMv6 where division is a function call to
emulation code, it's even more significant.

There are two variants of the code here, depending on whether a fast
__ffs (find least significant set bit) instruction is available.  This
allows the unpredictable branches in the bit-at-a-time shifting loop to
be eliminated.

If fast __ffs is not available, the "even/odd" GCD variant is used.

I use the following code to benchmark:

	#include <stdio.h>
	#include <stdlib.h>
	#include <stdint.h>
	#include <string.h>
	#include <time.h>
	#include <unistd.h>

	#define swap(a, b) \
		do { \
			a ^= b; \
			b ^= a; \
			a ^= b; \
		} while (0)

	unsigned long gcd0(unsigned long a, unsigned long b)
	{
		unsigned long r;

		if (a < b) {
			swap(a, b);
		}

		if (b == 0)
			return a;

		while ((r = a % b) != 0) {
			a = b;
			b = r;
		}

		return b;
	}

	unsigned long gcd1(unsigned long a, unsigned long b)
	{
		unsigned long r = a | b;

		if (!a || !b)
			return r;

		b >>= __builtin_ctzl(b);

		for (;;) {
			a >>= __builtin_ctzl(a);
			if (a == b)
				return a << __builtin_ctzl(r);

			if (a < b)
				swap(a, b);
			a -= b;
		}
	}

	unsigned long gcd2(unsigned long a, unsigned long b)
	{
		unsigned long r = a | b;

		if (!a || !b)
			return r;

		r &= -r;

		while (!(b & r))
			b >>= 1;

		for (;;) {
			while (!(a & r))
				a >>= 1;
			if (a == b)
				return a;

			if (a < b)
				swap(a, b);
			a -= b;
			a >>= 1;
			if (a & r)
				a += b;
			a >>= 1;
		}
	}

	unsigned long gcd3(unsigned long a, unsigned long b)
	{
		unsigned long r = a | b;

		if (!a || !b)
			return r;

		b >>= __builtin_ctzl(b);
		if (b == 1)
			return r & -r;

		for (;;) {
			a >>= __builtin_ctzl(a);
			if (a == 1)
				return r & -r;
			if (a == b)
				return a << __builtin_ctzl(r);

			if (a < b)
				swap(a, b);
			a -= b;
		}
	}

	unsigned long gcd4(unsigned long a, unsigned long b)
	{
		unsigned long r = a | b;

		if (!a || !b)
			return r;

		r &= -r;

		while (!(b & r))
			b >>= 1;
		if (b == r)
			return r;

		for (;;) {
			while (!(a & r))
				a >>= 1;
			if (a == r)
				return r;
			if (a == b)
				return a;

			if (a < b)
				swap(a, b);
			a -= b;
			a >>= 1;
			if (a & r)
				a += b;
			a >>= 1;
		}
	}

	static unsigned long (*gcd_func[])(unsigned long a, unsigned long b) = {
		gcd0, gcd1, gcd2, gcd3, gcd4,
	};

	#define TEST_ENTRIES (sizeof(gcd_func) / sizeof(gcd_func[0]))

	#if defined(__x86_64__)

	#define rdtscll(val) do { \
		unsigned long __a,__d; \
		__asm__ __volatile__("rdtsc" : "=a" (__a), "=d" (__d)); \
		(val) = ((unsigned long long)__a) | (((unsigned long long)__d)<<32); \
	} while(0)

	static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long),
								unsigned long a, unsigned long b, unsigned long *res)
	{
		unsigned long long start, end;
		unsigned long long ret;
		unsigned long gcd_res;

		rdtscll(start);
		gcd_res = gcd(a, b);
		rdtscll(end);

		if (end >= start)
			ret = end - start;
		else
			ret = ~0ULL - start + 1 + end;

		*res = gcd_res;
		return ret;
	}

	#else

	static inline struct timespec read_time(void)
	{
		struct timespec time;
		clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &time);
		return time;
	}

	static inline unsigned long long diff_time(struct timespec start, struct timespec end)
	{
		struct timespec temp;

		if ((end.tv_nsec - start.tv_nsec) < 0) {
			temp.tv_sec = end.tv_sec - start.tv_sec - 1;
			temp.tv_nsec = 1000000000ULL + end.tv_nsec - start.tv_nsec;
		} else {
			temp.tv_sec = end.tv_sec - start.tv_sec;
			temp.tv_nsec = end.tv_nsec - start.tv_nsec;
		}

		return temp.tv_sec * 1000000000ULL + temp.tv_nsec;
	}

	static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long),
								unsigned long a, unsigned long b, unsigned long *res)
	{
		struct timespec start, end;
		unsigned long gcd_res;

		start = read_time();
		gcd_res = gcd(a, b);
		end = read_time();

		*res = gcd_res;
		return diff_time(start, end);
	}

	#endif

	static inline unsigned long get_rand()
	{
		if (sizeof(long) == 8)
			return (unsigned long)rand() << 32 | rand();
		else
			return rand();
	}

	int main(int argc, char **argv)
	{
		unsigned int seed = time(0);
		int loops = 100;
		int repeats = 1000;
		unsigned long (*res)[TEST_ENTRIES];
		unsigned long long elapsed[TEST_ENTRIES];
		int i, j, k;

		for (;;) {
			int opt = getopt(argc, argv, "n:r:s:");
			/* End condition always first */
			if (opt == -1)
				break;

			switch (opt) {
			case 'n':
				loops = atoi(optarg);
				break;
			case 'r':
				repeats = atoi(optarg);
				break;
			case 's':
				seed = strtoul(optarg, NULL, 10);
				break;
			default:
				/* You won't actually get here. */
				break;
			}
		}

		res = malloc(sizeof(unsigned long) * TEST_ENTRIES * loops);
		memset(elapsed, 0, sizeof(elapsed));

		srand(seed);
		for (j = 0; j < loops; j++) {
			unsigned long a = get_rand();
			/* Do we have args? */
			unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
			unsigned long long min_elapsed[TEST_ENTRIES];
			for (k = 0; k < repeats; k++) {
				for (i = 0; i < TEST_ENTRIES; i++) {
					unsigned long long tmp = benchmark_gcd_func(gcd_func[i], a, b, &res[j][i]);
					if (k == 0 || min_elapsed[i] > tmp)
						min_elapsed[i] = tmp;
				}
			}
			for (i = 0; i < TEST_ENTRIES; i++)
				elapsed[i] += min_elapsed[i];
		}

		for (i = 0; i < TEST_ENTRIES; i++)
			printf("gcd%d: elapsed %llu\n", i, elapsed[i]);

		k = 0;
		srand(seed);
		for (j = 0; j < loops; j++) {
			unsigned long a = get_rand();
			unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
			for (i = 1; i < TEST_ENTRIES; i++) {
				if (res[j][i] != res[j][0])
					break;
			}
			if (i < TEST_ENTRIES) {
				if (k == 0) {
					k = 1;
					fprintf(stderr, "Error:\n");
				}
				fprintf(stderr, "gcd(%lu, %lu): ", a, b);
				for (i = 0; i < TEST_ENTRIES; i++)
					fprintf(stderr, "%ld%s", res[j][i], i < TEST_ENTRIES - 1 ? ", " : "\n");
			}
		}

		if (k == 0)
			fprintf(stderr, "PASS\n");

		free(res);

		return 0;
	}

Compiled with "-O2", on "VirtualBox 4.4.0-22-generic #38-Ubuntu x86_64" got:

  zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
  gcd0: elapsed 10174
  gcd1: elapsed 2120
  gcd2: elapsed 2902
  gcd3: elapsed 2039
  gcd4: elapsed 2812
  PASS
  zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
  gcd0: elapsed 9309
  gcd1: elapsed 2280
  gcd2: elapsed 2822
  gcd3: elapsed 2217
  gcd4: elapsed 2710
  PASS
  zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
  gcd0: elapsed 9589
  gcd1: elapsed 2098
  gcd2: elapsed 2815
  gcd3: elapsed 2030
  gcd4: elapsed 2718
  PASS
  zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
  gcd0: elapsed 9914
  gcd1: elapsed 2309
  gcd2: elapsed 2779
  gcd3: elapsed 2228
  gcd4: elapsed 2709
  PASS

[akpm@linux-foundation.org: avoid #defining a CONFIG_ variable]
Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
Signed-off-by: George Spelvin <linux@horizon.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-20 17:58:30 -07:00

570 lines
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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2003, 2004 Ralf Baechle
* Copyright (C) 2004 Maciej W. Rozycki
*/
#ifndef __ASM_CPU_FEATURES_H
#define __ASM_CPU_FEATURES_H
#include <asm/cpu.h>
#include <asm/cpu-info.h>
#include <cpu-feature-overrides.h>
/*
* SMP assumption: Options of CPU 0 are a superset of all processors.
* This is true for all known MIPS systems.
*/
#ifndef cpu_has_tlb
#define cpu_has_tlb (cpu_data[0].options & MIPS_CPU_TLB)
#endif
#ifndef cpu_has_ftlb
#define cpu_has_ftlb (cpu_data[0].options & MIPS_CPU_FTLB)
#endif
#ifndef cpu_has_tlbinv
#define cpu_has_tlbinv (cpu_data[0].options & MIPS_CPU_TLBINV)
#endif
#ifndef cpu_has_segments
#define cpu_has_segments (cpu_data[0].options & MIPS_CPU_SEGMENTS)
#endif
#ifndef cpu_has_eva
#define cpu_has_eva (cpu_data[0].options & MIPS_CPU_EVA)
#endif
#ifndef cpu_has_htw
#define cpu_has_htw (cpu_data[0].options & MIPS_CPU_HTW)
#endif
#ifndef cpu_has_ldpte
#define cpu_has_ldpte (cpu_data[0].options & MIPS_CPU_LDPTE)
#endif
#ifndef cpu_has_rixiex
#define cpu_has_rixiex (cpu_data[0].options & MIPS_CPU_RIXIEX)
#endif
#ifndef cpu_has_maar
#define cpu_has_maar (cpu_data[0].options & MIPS_CPU_MAAR)
#endif
#ifndef cpu_has_rw_llb
#define cpu_has_rw_llb (cpu_data[0].options & MIPS_CPU_RW_LLB)
#endif
/*
* For the moment we don't consider R6000 and R8000 so we can assume that
* anything that doesn't support R4000-style exceptions and interrupts is
* R3000-like. Users should still treat these two macro definitions as
* opaque.
*/
#ifndef cpu_has_3kex
#define cpu_has_3kex (!cpu_has_4kex)
#endif
#ifndef cpu_has_4kex
#define cpu_has_4kex (cpu_data[0].options & MIPS_CPU_4KEX)
#endif
#ifndef cpu_has_3k_cache
#define cpu_has_3k_cache (cpu_data[0].options & MIPS_CPU_3K_CACHE)
#endif
#define cpu_has_6k_cache 0
#define cpu_has_8k_cache 0
#ifndef cpu_has_4k_cache
#define cpu_has_4k_cache (cpu_data[0].options & MIPS_CPU_4K_CACHE)
#endif
#ifndef cpu_has_tx39_cache
#define cpu_has_tx39_cache (cpu_data[0].options & MIPS_CPU_TX39_CACHE)
#endif
#ifndef cpu_has_octeon_cache
#define cpu_has_octeon_cache 0
#endif
/* Don't override `cpu_has_fpu' to 1 or the "nofpu" option won't work. */
#ifndef cpu_has_fpu
#define cpu_has_fpu (current_cpu_data.options & MIPS_CPU_FPU)
#define raw_cpu_has_fpu (raw_current_cpu_data.options & MIPS_CPU_FPU)
#else
#define raw_cpu_has_fpu cpu_has_fpu
#endif
#ifndef cpu_has_32fpr
#define cpu_has_32fpr (cpu_data[0].options & MIPS_CPU_32FPR)
#endif
#ifndef cpu_has_counter
#define cpu_has_counter (cpu_data[0].options & MIPS_CPU_COUNTER)
#endif
#ifndef cpu_has_watch
#define cpu_has_watch (cpu_data[0].options & MIPS_CPU_WATCH)
#endif
#ifndef cpu_has_divec
#define cpu_has_divec (cpu_data[0].options & MIPS_CPU_DIVEC)
#endif
#ifndef cpu_has_vce
#define cpu_has_vce (cpu_data[0].options & MIPS_CPU_VCE)
#endif
#ifndef cpu_has_cache_cdex_p
#define cpu_has_cache_cdex_p (cpu_data[0].options & MIPS_CPU_CACHE_CDEX_P)
#endif
#ifndef cpu_has_cache_cdex_s
#define cpu_has_cache_cdex_s (cpu_data[0].options & MIPS_CPU_CACHE_CDEX_S)
#endif
#ifndef cpu_has_prefetch
#define cpu_has_prefetch (cpu_data[0].options & MIPS_CPU_PREFETCH)
#endif
#ifndef cpu_has_mcheck
#define cpu_has_mcheck (cpu_data[0].options & MIPS_CPU_MCHECK)
#endif
#ifndef cpu_has_ejtag
#define cpu_has_ejtag (cpu_data[0].options & MIPS_CPU_EJTAG)
#endif
#ifndef cpu_has_llsc
#define cpu_has_llsc (cpu_data[0].options & MIPS_CPU_LLSC)
#endif
#ifndef cpu_has_bp_ghist
#define cpu_has_bp_ghist (cpu_data[0].options & MIPS_CPU_BP_GHIST)
#endif
#ifndef kernel_uses_llsc
#define kernel_uses_llsc cpu_has_llsc
#endif
#ifndef cpu_has_guestctl0ext
#define cpu_has_guestctl0ext (cpu_data[0].options & MIPS_CPU_GUESTCTL0EXT)
#endif
#ifndef cpu_has_guestctl1
#define cpu_has_guestctl1 (cpu_data[0].options & MIPS_CPU_GUESTCTL1)
#endif
#ifndef cpu_has_guestctl2
#define cpu_has_guestctl2 (cpu_data[0].options & MIPS_CPU_GUESTCTL2)
#endif
#ifndef cpu_has_guestid
#define cpu_has_guestid (cpu_data[0].options & MIPS_CPU_GUESTID)
#endif
#ifndef cpu_has_drg
#define cpu_has_drg (cpu_data[0].options & MIPS_CPU_DRG)
#endif
#ifndef cpu_has_mips16
#define cpu_has_mips16 (cpu_data[0].ases & MIPS_ASE_MIPS16)
#endif
#ifndef cpu_has_mdmx
#define cpu_has_mdmx (cpu_data[0].ases & MIPS_ASE_MDMX)
#endif
#ifndef cpu_has_mips3d
#define cpu_has_mips3d (cpu_data[0].ases & MIPS_ASE_MIPS3D)
#endif
#ifndef cpu_has_smartmips
#define cpu_has_smartmips (cpu_data[0].ases & MIPS_ASE_SMARTMIPS)
#endif
#ifndef cpu_has_rixi
#define cpu_has_rixi (cpu_data[0].options & MIPS_CPU_RIXI)
#endif
#ifndef cpu_has_mmips
# ifdef CONFIG_SYS_SUPPORTS_MICROMIPS
# define cpu_has_mmips (cpu_data[0].options & MIPS_CPU_MICROMIPS)
# else
# define cpu_has_mmips 0
# endif
#endif
#ifndef cpu_has_lpa
#define cpu_has_lpa (cpu_data[0].options & MIPS_CPU_LPA)
#endif
#ifndef cpu_has_mvh
#define cpu_has_mvh (cpu_data[0].options & MIPS_CPU_MVH)
#endif
#ifndef cpu_has_xpa
#define cpu_has_xpa (cpu_has_lpa && cpu_has_mvh)
#endif
#ifndef cpu_has_vtag_icache
#define cpu_has_vtag_icache (cpu_data[0].icache.flags & MIPS_CACHE_VTAG)
#endif
#ifndef cpu_has_dc_aliases
#define cpu_has_dc_aliases (cpu_data[0].dcache.flags & MIPS_CACHE_ALIASES)
#endif
#ifndef cpu_has_ic_fills_f_dc
#define cpu_has_ic_fills_f_dc (cpu_data[0].icache.flags & MIPS_CACHE_IC_F_DC)
#endif
#ifndef cpu_has_pindexed_dcache
#define cpu_has_pindexed_dcache (cpu_data[0].dcache.flags & MIPS_CACHE_PINDEX)
#endif
#ifndef cpu_has_local_ebase
#define cpu_has_local_ebase 1
#endif
/*
* I-Cache snoops remote store. This only matters on SMP. Some multiprocessors
* such as the R10000 have I-Caches that snoop local stores; the embedded ones
* don't. For maintaining I-cache coherency this means we need to flush the
* D-cache all the way back to whever the I-cache does refills from, so the
* I-cache has a chance to see the new data at all. Then we have to flush the
* I-cache also.
* Note we may have been rescheduled and may no longer be running on the CPU
* that did the store so we can't optimize this into only doing the flush on
* the local CPU.
*/
#ifndef cpu_icache_snoops_remote_store
#ifdef CONFIG_SMP
#define cpu_icache_snoops_remote_store (cpu_data[0].icache.flags & MIPS_IC_SNOOPS_REMOTE)
#else
#define cpu_icache_snoops_remote_store 1
#endif
#endif
/* __builtin_constant_p(cpu_has_mips_r) && cpu_has_mips_r */
#if !((defined(cpu_has_mips32r1) && cpu_has_mips32r1) || \
(defined(cpu_has_mips32r2) && cpu_has_mips32r2) || \
(defined(cpu_has_mips32r6) && cpu_has_mips32r6) || \
(defined(cpu_has_mips64r1) && cpu_has_mips64r1) || \
(defined(cpu_has_mips64r2) && cpu_has_mips64r2) || \
(defined(cpu_has_mips64r6) && cpu_has_mips64r6))
#define CPU_NO_EFFICIENT_FFS 1
#endif
#ifndef cpu_has_mips_1
# define cpu_has_mips_1 (!cpu_has_mips_r6)
#endif
#ifndef cpu_has_mips_2
# define cpu_has_mips_2 (cpu_data[0].isa_level & MIPS_CPU_ISA_II)
#endif
#ifndef cpu_has_mips_3
# define cpu_has_mips_3 (cpu_data[0].isa_level & MIPS_CPU_ISA_III)
#endif
#ifndef cpu_has_mips_4
# define cpu_has_mips_4 (cpu_data[0].isa_level & MIPS_CPU_ISA_IV)
#endif
#ifndef cpu_has_mips_5
# define cpu_has_mips_5 (cpu_data[0].isa_level & MIPS_CPU_ISA_V)
#endif
#ifndef cpu_has_mips32r1
# define cpu_has_mips32r1 (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R1)
#endif
#ifndef cpu_has_mips32r2
# define cpu_has_mips32r2 (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R2)
#endif
#ifndef cpu_has_mips32r6
# define cpu_has_mips32r6 (cpu_data[0].isa_level & MIPS_CPU_ISA_M32R6)
#endif
#ifndef cpu_has_mips64r1
# define cpu_has_mips64r1 (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R1)
#endif
#ifndef cpu_has_mips64r2
# define cpu_has_mips64r2 (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R2)
#endif
#ifndef cpu_has_mips64r6
# define cpu_has_mips64r6 (cpu_data[0].isa_level & MIPS_CPU_ISA_M64R6)
#endif
/*
* Shortcuts ...
*/
#define cpu_has_mips_2_3_4_5 (cpu_has_mips_2 | cpu_has_mips_3_4_5)
#define cpu_has_mips_3_4_5 (cpu_has_mips_3 | cpu_has_mips_4_5)
#define cpu_has_mips_4_5 (cpu_has_mips_4 | cpu_has_mips_5)
#define cpu_has_mips_2_3_4_5_r (cpu_has_mips_2 | cpu_has_mips_3_4_5_r)
#define cpu_has_mips_3_4_5_r (cpu_has_mips_3 | cpu_has_mips_4_5_r)
#define cpu_has_mips_4_5_r (cpu_has_mips_4 | cpu_has_mips_5_r)
#define cpu_has_mips_5_r (cpu_has_mips_5 | cpu_has_mips_r)
#define cpu_has_mips_3_4_5_64_r2_r6 \
(cpu_has_mips_3 | cpu_has_mips_4_5_64_r2_r6)
#define cpu_has_mips_4_5_64_r2_r6 \
(cpu_has_mips_4_5 | cpu_has_mips64r1 | \
cpu_has_mips_r2 | cpu_has_mips_r6)
#define cpu_has_mips32 (cpu_has_mips32r1 | cpu_has_mips32r2 | cpu_has_mips32r6)
#define cpu_has_mips64 (cpu_has_mips64r1 | cpu_has_mips64r2 | cpu_has_mips64r6)
#define cpu_has_mips_r1 (cpu_has_mips32r1 | cpu_has_mips64r1)
#define cpu_has_mips_r2 (cpu_has_mips32r2 | cpu_has_mips64r2)
#define cpu_has_mips_r6 (cpu_has_mips32r6 | cpu_has_mips64r6)
#define cpu_has_mips_r (cpu_has_mips32r1 | cpu_has_mips32r2 | \
cpu_has_mips32r6 | cpu_has_mips64r1 | \
cpu_has_mips64r2 | cpu_has_mips64r6)
/* MIPSR2 and MIPSR6 have a lot of similarities */
#define cpu_has_mips_r2_r6 (cpu_has_mips_r2 | cpu_has_mips_r6)
/*
* cpu_has_mips_r2_exec_hazard - return if IHB is required on current processor
*
* Returns non-zero value if the current processor implementation requires
* an IHB instruction to deal with an instruction hazard as per MIPS R2
* architecture specification, zero otherwise.
*/
#ifndef cpu_has_mips_r2_exec_hazard
#define cpu_has_mips_r2_exec_hazard \
({ \
int __res; \
\
switch (current_cpu_type()) { \
case CPU_M14KC: \
case CPU_74K: \
case CPU_1074K: \
case CPU_PROAPTIV: \
case CPU_P5600: \
case CPU_M5150: \
case CPU_QEMU_GENERIC: \
case CPU_CAVIUM_OCTEON: \
case CPU_CAVIUM_OCTEON_PLUS: \
case CPU_CAVIUM_OCTEON2: \
case CPU_CAVIUM_OCTEON3: \
__res = 0; \
break; \
\
default: \
__res = 1; \
} \
\
__res; \
})
#endif
/*
* MIPS32, MIPS64, VR5500, IDT32332, IDT32334 and maybe a few other
* pre-MIPS32/MIPS64 processors have CLO, CLZ. The IDT RC64574 is 64-bit and
* has CLO and CLZ but not DCLO nor DCLZ. For 64-bit kernels
* cpu_has_clo_clz also indicates the availability of DCLO and DCLZ.
*/
#ifndef cpu_has_clo_clz
#define cpu_has_clo_clz cpu_has_mips_r
#endif
/*
* MIPS32 R2, MIPS64 R2, Loongson 3A and Octeon have WSBH.
* MIPS64 R2, Loongson 3A and Octeon have WSBH, DSBH and DSHD.
* This indicates the availability of WSBH and in case of 64 bit CPUs also
* DSBH and DSHD.
*/
#ifndef cpu_has_wsbh
#define cpu_has_wsbh cpu_has_mips_r2
#endif
#ifndef cpu_has_dsp
#define cpu_has_dsp (cpu_data[0].ases & MIPS_ASE_DSP)
#endif
#ifndef cpu_has_dsp2
#define cpu_has_dsp2 (cpu_data[0].ases & MIPS_ASE_DSP2P)
#endif
#ifndef cpu_has_dsp3
#define cpu_has_dsp3 (cpu_data[0].ases & MIPS_ASE_DSP3)
#endif
#ifndef cpu_has_mipsmt
#define cpu_has_mipsmt (cpu_data[0].ases & MIPS_ASE_MIPSMT)
#endif
#ifndef cpu_has_vp
#define cpu_has_vp (cpu_data[0].options & MIPS_CPU_VP)
#endif
#ifndef cpu_has_userlocal
#define cpu_has_userlocal (cpu_data[0].options & MIPS_CPU_ULRI)
#endif
#ifdef CONFIG_32BIT
# ifndef cpu_has_nofpuex
# define cpu_has_nofpuex (cpu_data[0].options & MIPS_CPU_NOFPUEX)
# endif
# ifndef cpu_has_64bits
# define cpu_has_64bits (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
# endif
# ifndef cpu_has_64bit_zero_reg
# define cpu_has_64bit_zero_reg (cpu_data[0].isa_level & MIPS_CPU_ISA_64BIT)
# endif
# ifndef cpu_has_64bit_gp_regs
# define cpu_has_64bit_gp_regs 0
# endif
# ifndef cpu_has_64bit_addresses
# define cpu_has_64bit_addresses 0
# endif
# ifndef cpu_vmbits
# define cpu_vmbits 31
# endif
#endif
#ifdef CONFIG_64BIT
# ifndef cpu_has_nofpuex
# define cpu_has_nofpuex 0
# endif
# ifndef cpu_has_64bits
# define cpu_has_64bits 1
# endif
# ifndef cpu_has_64bit_zero_reg
# define cpu_has_64bit_zero_reg 1
# endif
# ifndef cpu_has_64bit_gp_regs
# define cpu_has_64bit_gp_regs 1
# endif
# ifndef cpu_has_64bit_addresses
# define cpu_has_64bit_addresses 1
# endif
# ifndef cpu_vmbits
# define cpu_vmbits cpu_data[0].vmbits
# define __NEED_VMBITS_PROBE
# endif
#endif
#if defined(CONFIG_CPU_MIPSR2_IRQ_VI) && !defined(cpu_has_vint)
# define cpu_has_vint (cpu_data[0].options & MIPS_CPU_VINT)
#elif !defined(cpu_has_vint)
# define cpu_has_vint 0
#endif
#if defined(CONFIG_CPU_MIPSR2_IRQ_EI) && !defined(cpu_has_veic)
# define cpu_has_veic (cpu_data[0].options & MIPS_CPU_VEIC)
#elif !defined(cpu_has_veic)
# define cpu_has_veic 0
#endif
#ifndef cpu_has_inclusive_pcaches
#define cpu_has_inclusive_pcaches (cpu_data[0].options & MIPS_CPU_INCLUSIVE_CACHES)
#endif
#ifndef cpu_dcache_line_size
#define cpu_dcache_line_size() cpu_data[0].dcache.linesz
#endif
#ifndef cpu_icache_line_size
#define cpu_icache_line_size() cpu_data[0].icache.linesz
#endif
#ifndef cpu_scache_line_size
#define cpu_scache_line_size() cpu_data[0].scache.linesz
#endif
#ifndef cpu_hwrena_impl_bits
#define cpu_hwrena_impl_bits 0
#endif
#ifndef cpu_has_perf_cntr_intr_bit
#define cpu_has_perf_cntr_intr_bit (cpu_data[0].options & MIPS_CPU_PCI)
#endif
#ifndef cpu_has_vz
#define cpu_has_vz (cpu_data[0].ases & MIPS_ASE_VZ)
#endif
#if defined(CONFIG_CPU_HAS_MSA) && !defined(cpu_has_msa)
# define cpu_has_msa (cpu_data[0].ases & MIPS_ASE_MSA)
#elif !defined(cpu_has_msa)
# define cpu_has_msa 0
#endif
#ifndef cpu_has_fre
# define cpu_has_fre (cpu_data[0].options & MIPS_CPU_FRE)
#endif
#ifndef cpu_has_cdmm
# define cpu_has_cdmm (cpu_data[0].options & MIPS_CPU_CDMM)
#endif
#ifndef cpu_has_small_pages
# define cpu_has_small_pages (cpu_data[0].options & MIPS_CPU_SP)
#endif
#ifndef cpu_has_nan_legacy
#define cpu_has_nan_legacy (cpu_data[0].options & MIPS_CPU_NAN_LEGACY)
#endif
#ifndef cpu_has_nan_2008
#define cpu_has_nan_2008 (cpu_data[0].options & MIPS_CPU_NAN_2008)
#endif
#ifndef cpu_has_ebase_wg
# define cpu_has_ebase_wg (cpu_data[0].options & MIPS_CPU_EBASE_WG)
#endif
#ifndef cpu_has_badinstr
# define cpu_has_badinstr (cpu_data[0].options & MIPS_CPU_BADINSTR)
#endif
#ifndef cpu_has_badinstrp
# define cpu_has_badinstrp (cpu_data[0].options & MIPS_CPU_BADINSTRP)
#endif
#ifndef cpu_has_contextconfig
# define cpu_has_contextconfig (cpu_data[0].options & MIPS_CPU_CTXTC)
#endif
#ifndef cpu_has_perf
# define cpu_has_perf (cpu_data[0].options & MIPS_CPU_PERF)
#endif
/*
* Guest capabilities
*/
#ifndef cpu_guest_has_conf1
#define cpu_guest_has_conf1 (cpu_data[0].guest.conf & (1 << 1))
#endif
#ifndef cpu_guest_has_conf2
#define cpu_guest_has_conf2 (cpu_data[0].guest.conf & (1 << 2))
#endif
#ifndef cpu_guest_has_conf3
#define cpu_guest_has_conf3 (cpu_data[0].guest.conf & (1 << 3))
#endif
#ifndef cpu_guest_has_conf4
#define cpu_guest_has_conf4 (cpu_data[0].guest.conf & (1 << 4))
#endif
#ifndef cpu_guest_has_conf5
#define cpu_guest_has_conf5 (cpu_data[0].guest.conf & (1 << 5))
#endif
#ifndef cpu_guest_has_conf6
#define cpu_guest_has_conf6 (cpu_data[0].guest.conf & (1 << 6))
#endif
#ifndef cpu_guest_has_conf7
#define cpu_guest_has_conf7 (cpu_data[0].guest.conf & (1 << 7))
#endif
#ifndef cpu_guest_has_fpu
#define cpu_guest_has_fpu (cpu_data[0].guest.options & MIPS_CPU_FPU)
#endif
#ifndef cpu_guest_has_watch
#define cpu_guest_has_watch (cpu_data[0].guest.options & MIPS_CPU_WATCH)
#endif
#ifndef cpu_guest_has_contextconfig
#define cpu_guest_has_contextconfig (cpu_data[0].guest.options & MIPS_CPU_CTXTC)
#endif
#ifndef cpu_guest_has_segments
#define cpu_guest_has_segments (cpu_data[0].guest.options & MIPS_CPU_SEGMENTS)
#endif
#ifndef cpu_guest_has_badinstr
#define cpu_guest_has_badinstr (cpu_data[0].guest.options & MIPS_CPU_BADINSTR)
#endif
#ifndef cpu_guest_has_badinstrp
#define cpu_guest_has_badinstrp (cpu_data[0].guest.options & MIPS_CPU_BADINSTRP)
#endif
#ifndef cpu_guest_has_htw
#define cpu_guest_has_htw (cpu_data[0].guest.options & MIPS_CPU_HTW)
#endif
#ifndef cpu_guest_has_msa
#define cpu_guest_has_msa (cpu_data[0].guest.ases & MIPS_ASE_MSA)
#endif
#ifndef cpu_guest_has_kscr
#define cpu_guest_has_kscr(n) (cpu_data[0].guest.kscratch_mask & (1u << (n)))
#endif
#ifndef cpu_guest_has_rw_llb
#define cpu_guest_has_rw_llb (cpu_has_mips_r6 || (cpu_data[0].guest.options & MIPS_CPU_RW_LLB))
#endif
#ifndef cpu_guest_has_perf
#define cpu_guest_has_perf (cpu_data[0].guest.options & MIPS_CPU_PERF)
#endif
#ifndef cpu_guest_has_maar
#define cpu_guest_has_maar (cpu_data[0].guest.options & MIPS_CPU_MAAR)
#endif
/*
* Guest dynamic capabilities
*/
#ifndef cpu_guest_has_dyn_fpu
#define cpu_guest_has_dyn_fpu (cpu_data[0].guest.options_dyn & MIPS_CPU_FPU)
#endif
#ifndef cpu_guest_has_dyn_watch
#define cpu_guest_has_dyn_watch (cpu_data[0].guest.options_dyn & MIPS_CPU_WATCH)
#endif
#ifndef cpu_guest_has_dyn_contextconfig
#define cpu_guest_has_dyn_contextconfig (cpu_data[0].guest.options_dyn & MIPS_CPU_CTXTC)
#endif
#ifndef cpu_guest_has_dyn_perf
#define cpu_guest_has_dyn_perf (cpu_data[0].guest.options_dyn & MIPS_CPU_PERF)
#endif
#ifndef cpu_guest_has_dyn_msa
#define cpu_guest_has_dyn_msa (cpu_data[0].guest.ases_dyn & MIPS_ASE_MSA)
#endif
#ifndef cpu_guest_has_dyn_maar
#define cpu_guest_has_dyn_maar (cpu_data[0].guest.options_dyn & MIPS_CPU_MAAR)
#endif
#endif /* __ASM_CPU_FEATURES_H */
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