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freebsd-src/sys/contrib/pcg-c/include/pcg_variants.h
Conrad Meyer 43eccfe9b4 pcg-c: Add 'static' to inline function definitions 
Make the inlines static to avoid kernel build failure with Clang 11 on i386.
(The issue was not observed with Clang 10, currently in tree; reproduction
depends on compiler inlining choices.)

The compiler may choose not to inline 'bare' C inlines, and in that case
expects a symbol of the same name will be available.  It does not
automatically define that symbol at use, because of traditional C linking
semantics. (In contrast, C++ does define it, and then deduplicates redundant
definitions at link).  As we do not instantiate the C99 inline ('extern
inline ...;'), the linker errors with "undefined symbol."

Reported by:	dim
Tested by:	dim
Fixes:		r364219
2020-08-15 18:46:26 +00:00

2527 lines
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/*
* PCG Random Number Generation for C.
*
* Copyright 2014-2019 Melissa O'Neill <oneill@pcg-random.org>,
* and the PCG Project contributors.
*
* SPDX-License-Identifier: (Apache-2.0 OR MIT)
*
* Licensed under the Apache License, Version 2.0 (provided in
* LICENSE-APACHE.txt and at http://www.apache.org/licenses/LICENSE-2.0)
* or under the MIT license (provided in LICENSE-MIT.txt and at
* http://opensource.org/licenses/MIT), at your option. This file may not
* be copied, modified, or distributed except according to those terms.
*
* Distributed on an "AS IS" BASIS, WITHOUT WARRANTY OF ANY KIND, either
* express or implied. See your chosen license for details.
*
* For additional information about the PCG random number generation scheme,
* visit http://www.pcg-random.org/.
*/
/*
* This code is derived from the canonical C++ PCG implementation, which
* has many additional features and is preferable if you can use C++ in
* your project.
*
* Much of the derivation was performed mechanically. In particular, the
* output functions were generated by compiling the C++ output functions
* into LLVM bitcode and then transforming that using the LLVM C backend
* (from https://github.com/draperlaboratory/llvm-cbe), and then
* postprocessing and hand editing the output.
*
* Much of the remaining code was generated by C-preprocessor metaprogramming.
*/
#ifndef PCG_VARIANTS_H_INCLUDED
#define PCG_VARIANTS_H_INCLUDED 1
#if defined(__SIZEOF_INT128__) && __SIZEOF_INT128__
typedef __uint128_t pcg128_t;
#define PCG_128BIT_CONSTANT(high,low) \
((((pcg128_t)high) << 64) + low)
#define PCG_HAS_128BIT_OPS 1
#else
#define PCG_HAS_128BIT_OPS 0
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* Rotate helper functions.
*/
static inline uint8_t pcg_rotr_8(uint8_t value, unsigned int rot)
{
/* Unfortunately, clang is kinda pathetic when it comes to properly
* recognizing idiomatic rotate code, so for clang we actually provide
* assembler directives (enabled with PCG_USE_INLINE_ASM). Boo, hiss.
*/
#if PCG_USE_INLINE_ASM && defined(__clang__) && (defined(__x86_64__) || defined(__i386__))
__asm__ ("rorb %%cl, %0" : "=r" (value) : "0" (value), "c" (rot));
return value;
#else
return (value >> rot) | (value << ((- rot) & 7));
#endif
}
static inline uint16_t pcg_rotr_16(uint16_t value, unsigned int rot)
{
#if PCG_USE_INLINE_ASM && defined(__clang__) && (defined(__x86_64__) || defined(__i386__))
__asm__ ("rorw %%cl, %0" : "=r" (value) : "0" (value), "c" (rot));
return value;
#else
return (value >> rot) | (value << ((- rot) & 15));
#endif
}
static inline uint32_t pcg_rotr_32(uint32_t value, unsigned int rot)
{
#if PCG_USE_INLINE_ASM && defined(__clang__) && (defined(__x86_64__) || defined(__i386__))
__asm__ ("rorl %%cl, %0" : "=r" (value) : "0" (value), "c" (rot));
return value;
#else
return (value >> rot) | (value << ((- rot) & 31));
#endif
}
static inline uint64_t pcg_rotr_64(uint64_t value, unsigned int rot)
{
#if 0 && PCG_USE_INLINE_ASM && defined(__clang__) && (defined(__x86_64__) || defined(__i386__))
/* For whatever reason, clang actually *does* generate rotq by
itself, so we don't need this code. */
__asm__ ("rorq %%cl, %0" : "=r" (value) : "0" (value), "c" (rot));
return value;
#else
return (value >> rot) | (value << ((- rot) & 63));
#endif
}
#if PCG_HAS_128BIT_OPS
static inline pcg128_t pcg_rotr_128(pcg128_t value, unsigned int rot)
{
return (value >> rot) | (value << ((- rot) & 127));
}
#endif
/*
* Output functions. These are the core of the PCG generation scheme.
*/
/* XSH RS */
static inline uint8_t pcg_output_xsh_rs_16_8(uint16_t state)
{
return (uint8_t)(((state >> 7u) ^ state) >> ((state >> 14u) + 3u));
}
static inline uint16_t pcg_output_xsh_rs_32_16(uint32_t state)
{
return (uint16_t)(((state >> 11u) ^ state) >> ((state >> 30u) + 11u));
}
static inline uint32_t pcg_output_xsh_rs_64_32(uint64_t state)
{
return (uint32_t)(((state >> 22u) ^ state) >> ((state >> 61u) + 22u));
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_output_xsh_rs_128_64(pcg128_t state)
{
return (uint64_t)(((state >> 43u) ^ state) >> ((state >> 124u) + 45u));
}
#endif
/* XSH RR */
static inline uint8_t pcg_output_xsh_rr_16_8(uint16_t state)
{
return pcg_rotr_8(((state >> 5u) ^ state) >> 5u, state >> 13u);
}
static inline uint16_t pcg_output_xsh_rr_32_16(uint32_t state)
{
return pcg_rotr_16(((state >> 10u) ^ state) >> 12u, state >> 28u);
}
static inline uint32_t pcg_output_xsh_rr_64_32(uint64_t state)
{
return pcg_rotr_32(((state >> 18u) ^ state) >> 27u, state >> 59u);
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_output_xsh_rr_128_64(pcg128_t state)
{
return pcg_rotr_64(((state >> 35u) ^ state) >> 58u, state >> 122u);
}
#endif
/* RXS M XS */
static inline uint8_t pcg_output_rxs_m_xs_8_8(uint8_t state)
{
uint8_t word = ((state >> ((state >> 6u) + 2u)) ^ state) * 217u;
return (word >> 6u) ^ word;
}
static inline uint16_t pcg_output_rxs_m_xs_16_16(uint16_t state)
{
uint16_t word = ((state >> ((state >> 13u) + 3u)) ^ state) * 62169u;
return (word >> 11u) ^ word;
}
static inline uint32_t pcg_output_rxs_m_xs_32_32(uint32_t state)
{
uint32_t word = ((state >> ((state >> 28u) + 4u)) ^ state) * 277803737u;
return (word >> 22u) ^ word;
}
static inline uint64_t pcg_output_rxs_m_xs_64_64(uint64_t state)
{
uint64_t word = ((state >> ((state >> 59u) + 5u)) ^ state)
* 12605985483714917081ull;
return (word >> 43u) ^ word;
}
#if PCG_HAS_128BIT_OPS
static inline pcg128_t pcg_output_rxs_m_xs_128_128(pcg128_t state)
{
pcg128_t word = ((state >> ((state >> 122u) + 6u)) ^ state)
* (PCG_128BIT_CONSTANT(17766728186571221404ULL,
12605985483714917081ULL));
/* 327738287884841127335028083622016905945 */
return (word >> 86u) ^ word;
}
#endif
/* RXS M */
static inline uint8_t pcg_output_rxs_m_16_8(uint16_t state)
{
return (((state >> ((state >> 13u) + 3u)) ^ state) * 62169u) >> 8u;
}
static inline uint16_t pcg_output_rxs_m_32_16(uint32_t state)
{
return (((state >> ((state >> 28u) + 4u)) ^ state) * 277803737u) >> 16u;
}
static inline uint32_t pcg_output_rxs_m_64_32(uint64_t state)
{
return (((state >> ((state >> 59u) + 5u)) ^ state)
* 12605985483714917081ull) >> 32u;
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_output_rxs_m_128_64(pcg128_t state)
{
return (((state >> ((state >> 122u) + 6u)) ^ state)
* (PCG_128BIT_CONSTANT(17766728186571221404ULL,
12605985483714917081ULL))) >> 64u;
/* 327738287884841127335028083622016905945 */
}
#endif
/* XSL RR (only defined for >= 64 bits) */
static inline uint32_t pcg_output_xsl_rr_64_32(uint64_t state)
{
return pcg_rotr_32(((uint32_t)(state >> 32u)) ^ (uint32_t)state,
state >> 59u);
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_output_xsl_rr_128_64(pcg128_t state)
{
return pcg_rotr_64(((uint64_t)(state >> 64u)) ^ (uint64_t)state,
state >> 122u);
}
#endif
/* XSL RR RR (only defined for >= 64 bits) */
static inline uint64_t pcg_output_xsl_rr_rr_64_64(uint64_t state)
{
uint32_t rot1 = (uint32_t)(state >> 59u);
uint32_t high = (uint32_t)(state >> 32u);
uint32_t low = (uint32_t)state;
uint32_t xored = high ^ low;
uint32_t newlow = pcg_rotr_32(xored, rot1);
uint32_t newhigh = pcg_rotr_32(high, newlow & 31u);
return (((uint64_t)newhigh) << 32u) | newlow;
}
#if PCG_HAS_128BIT_OPS
static inline pcg128_t pcg_output_xsl_rr_rr_128_128(pcg128_t state)
{
uint32_t rot1 = (uint32_t)(state >> 122u);
uint64_t high = (uint64_t)(state >> 64u);
uint64_t low = (uint64_t)state;
uint64_t xored = high ^ low;
uint64_t newlow = pcg_rotr_64(xored, rot1);
uint64_t newhigh = pcg_rotr_64(high, newlow & 63u);
return (((pcg128_t)newhigh) << 64u) | newlow;
}
#endif
#define PCG_DEFAULT_MULTIPLIER_8 141U
#define PCG_DEFAULT_MULTIPLIER_16 12829U
#define PCG_DEFAULT_MULTIPLIER_32 747796405U
#define PCG_DEFAULT_MULTIPLIER_64 6364136223846793005ULL
#define PCG_DEFAULT_INCREMENT_8 77U
#define PCG_DEFAULT_INCREMENT_16 47989U
#define PCG_DEFAULT_INCREMENT_32 2891336453U
#define PCG_DEFAULT_INCREMENT_64 1442695040888963407ULL
#if PCG_HAS_128BIT_OPS
#define PCG_DEFAULT_MULTIPLIER_128 \
PCG_128BIT_CONSTANT(2549297995355413924ULL,4865540595714422341ULL)
#define PCG_DEFAULT_INCREMENT_128 \
PCG_128BIT_CONSTANT(6364136223846793005ULL,1442695040888963407ULL)
#endif
/*
* Static initialization constants (if you can't call srandom for some
* bizarre reason).
*/
#define PCG_STATE_ONESEQ_8_INITIALIZER { 0xd7U }
#define PCG_STATE_ONESEQ_16_INITIALIZER { 0x20dfU }
#define PCG_STATE_ONESEQ_32_INITIALIZER { 0x46b56677U }
#define PCG_STATE_ONESEQ_64_INITIALIZER { 0x4d595df4d0f33173ULL }
#if PCG_HAS_128BIT_OPS
#define PCG_STATE_ONESEQ_128_INITIALIZER \
{ PCG_128BIT_CONSTANT(0xb8dc10e158a92392ULL, 0x98046df007ec0a53ULL) }
#endif
#define PCG_STATE_UNIQUE_8_INITIALIZER PCG_STATE_ONESEQ_8_INITIALIZER
#define PCG_STATE_UNIQUE_16_INITIALIZER PCG_STATE_ONESEQ_16_INITIALIZER
#define PCG_STATE_UNIQUE_32_INITIALIZER PCG_STATE_ONESEQ_32_INITIALIZER
#define PCG_STATE_UNIQUE_64_INITIALIZER PCG_STATE_ONESEQ_64_INITIALIZER
#if PCG_HAS_128BIT_OPS
#define PCG_STATE_UNIQUE_128_INITIALIZER PCG_STATE_ONESEQ_128_INITIALIZER
#endif
#define PCG_STATE_MCG_8_INITIALIZER { 0xe5U }
#define PCG_STATE_MCG_16_INITIALIZER { 0xa5e5U }
#define PCG_STATE_MCG_32_INITIALIZER { 0xd15ea5e5U }
#define PCG_STATE_MCG_64_INITIALIZER { 0xcafef00dd15ea5e5ULL }
#if PCG_HAS_128BIT_OPS
#define PCG_STATE_MCG_128_INITIALIZER \
{ PCG_128BIT_CONSTANT(0x0000000000000000ULL, 0xcafef00dd15ea5e5ULL) }
#endif
#define PCG_STATE_SETSEQ_8_INITIALIZER { 0x9bU, 0xdbU }
#define PCG_STATE_SETSEQ_16_INITIALIZER { 0xe39bU, 0x5bdbU }
#define PCG_STATE_SETSEQ_32_INITIALIZER { 0xec02d89bU, 0x94b95bdbU }
#define PCG_STATE_SETSEQ_64_INITIALIZER \
{ 0x853c49e6748fea9bULL, 0xda3e39cb94b95bdbULL }
#if PCG_HAS_128BIT_OPS
#define PCG_STATE_SETSEQ_128_INITIALIZER \
{ PCG_128BIT_CONSTANT(0x979c9a98d8462005ULL, 0x7d3e9cb6cfe0549bULL), \
PCG_128BIT_CONSTANT(0x0000000000000001ULL, 0xda3e39cb94b95bdbULL) }
#endif
/* Representations for the oneseq, mcg, and unique variants */
struct pcg_state_8 {
uint8_t state;
};
struct pcg_state_16 {
uint16_t state;
};
struct pcg_state_32 {
uint32_t state;
};
struct pcg_state_64 {
uint64_t state;
};
#if PCG_HAS_128BIT_OPS
struct pcg_state_128 {
pcg128_t state;
};
#endif
/* Representations setseq variants */
struct pcg_state_setseq_8 {
uint8_t state;
uint8_t inc;
};
struct pcg_state_setseq_16 {
uint16_t state;
uint16_t inc;
};
struct pcg_state_setseq_32 {
uint32_t state;
uint32_t inc;
};
struct pcg_state_setseq_64 {
uint64_t state;
uint64_t inc;
};
#if PCG_HAS_128BIT_OPS
struct pcg_state_setseq_128 {
pcg128_t state;
pcg128_t inc;
};
#endif
/* Multi-step advance functions (jump-ahead, jump-back) */
extern uint8_t pcg_advance_lcg_8(uint8_t state, uint8_t delta, uint8_t cur_mult,
uint8_t cur_plus);
extern uint16_t pcg_advance_lcg_16(uint16_t state, uint16_t delta,
uint16_t cur_mult, uint16_t cur_plus);
extern uint32_t pcg_advance_lcg_32(uint32_t state, uint32_t delta,
uint32_t cur_mult, uint32_t cur_plus);
extern uint64_t pcg_advance_lcg_64(uint64_t state, uint64_t delta,
uint64_t cur_mult, uint64_t cur_plus);
#if PCG_HAS_128BIT_OPS
extern pcg128_t pcg_advance_lcg_128(pcg128_t state, pcg128_t delta,
pcg128_t cur_mult, pcg128_t cur_plus);
#endif
/* Functions to advance the underlying LCG, one version for each size and
* each style. These functions are considered semi-private. There is rarely
* a good reason to call them directly.
*/
static inline void pcg_oneseq_8_step_r(struct pcg_state_8* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_8
+ PCG_DEFAULT_INCREMENT_8;
}
static inline void pcg_oneseq_8_advance_r(struct pcg_state_8* rng, uint8_t delta)
{
rng->state = pcg_advance_lcg_8(rng->state, delta, PCG_DEFAULT_MULTIPLIER_8,
PCG_DEFAULT_INCREMENT_8);
}
static inline void pcg_mcg_8_step_r(struct pcg_state_8* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_8;
}
static inline void pcg_mcg_8_advance_r(struct pcg_state_8* rng, uint8_t delta)
{
rng->state
= pcg_advance_lcg_8(rng->state, delta, PCG_DEFAULT_MULTIPLIER_8, 0u);
}
static inline void pcg_unique_8_step_r(struct pcg_state_8* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_8
+ (uint8_t)(((intptr_t)rng) | 1u);
}
static inline void pcg_unique_8_advance_r(struct pcg_state_8* rng, uint8_t delta)
{
rng->state = pcg_advance_lcg_8(rng->state, delta, PCG_DEFAULT_MULTIPLIER_8,
(uint8_t)(((intptr_t)rng) | 1u));
}
static inline void pcg_setseq_8_step_r(struct pcg_state_setseq_8* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_8 + rng->inc;
}
static inline void pcg_setseq_8_advance_r(struct pcg_state_setseq_8* rng,
uint8_t delta)
{
rng->state = pcg_advance_lcg_8(rng->state, delta, PCG_DEFAULT_MULTIPLIER_8,
rng->inc);
}
static inline void pcg_oneseq_16_step_r(struct pcg_state_16* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_16
+ PCG_DEFAULT_INCREMENT_16;
}
static inline void pcg_oneseq_16_advance_r(struct pcg_state_16* rng, uint16_t delta)
{
rng->state = pcg_advance_lcg_16(
rng->state, delta, PCG_DEFAULT_MULTIPLIER_16, PCG_DEFAULT_INCREMENT_16);
}
static inline void pcg_mcg_16_step_r(struct pcg_state_16* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_16;
}
static inline void pcg_mcg_16_advance_r(struct pcg_state_16* rng, uint16_t delta)
{
rng->state
= pcg_advance_lcg_16(rng->state, delta, PCG_DEFAULT_MULTIPLIER_16, 0u);
}
static inline void pcg_unique_16_step_r(struct pcg_state_16* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_16
+ (uint16_t)(((intptr_t)rng) | 1u);
}
static inline void pcg_unique_16_advance_r(struct pcg_state_16* rng, uint16_t delta)
{
rng->state
= pcg_advance_lcg_16(rng->state, delta, PCG_DEFAULT_MULTIPLIER_16,
(uint16_t)(((intptr_t)rng) | 1u));
}
static inline void pcg_setseq_16_step_r(struct pcg_state_setseq_16* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_16 + rng->inc;
}
static inline void pcg_setseq_16_advance_r(struct pcg_state_setseq_16* rng,
uint16_t delta)
{
rng->state = pcg_advance_lcg_16(rng->state, delta,
PCG_DEFAULT_MULTIPLIER_16, rng->inc);
}
static inline void pcg_oneseq_32_step_r(struct pcg_state_32* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_32
+ PCG_DEFAULT_INCREMENT_32;
}
static inline void pcg_oneseq_32_advance_r(struct pcg_state_32* rng, uint32_t delta)
{
rng->state = pcg_advance_lcg_32(
rng->state, delta, PCG_DEFAULT_MULTIPLIER_32, PCG_DEFAULT_INCREMENT_32);
}
static inline void pcg_mcg_32_step_r(struct pcg_state_32* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_32;
}
static inline void pcg_mcg_32_advance_r(struct pcg_state_32* rng, uint32_t delta)
{
rng->state
= pcg_advance_lcg_32(rng->state, delta, PCG_DEFAULT_MULTIPLIER_32, 0u);
}
static inline void pcg_unique_32_step_r(struct pcg_state_32* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_32
+ (uint32_t)(((intptr_t)rng) | 1u);
}
static inline void pcg_unique_32_advance_r(struct pcg_state_32* rng, uint32_t delta)
{
rng->state
= pcg_advance_lcg_32(rng->state, delta, PCG_DEFAULT_MULTIPLIER_32,
(uint32_t)(((intptr_t)rng) | 1u));
}
static inline void pcg_setseq_32_step_r(struct pcg_state_setseq_32* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_32 + rng->inc;
}
static inline void pcg_setseq_32_advance_r(struct pcg_state_setseq_32* rng,
uint32_t delta)
{
rng->state = pcg_advance_lcg_32(rng->state, delta,
PCG_DEFAULT_MULTIPLIER_32, rng->inc);
}
static inline void pcg_oneseq_64_step_r(struct pcg_state_64* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_64
+ PCG_DEFAULT_INCREMENT_64;
}
static inline void pcg_oneseq_64_advance_r(struct pcg_state_64* rng, uint64_t delta)
{
rng->state = pcg_advance_lcg_64(
rng->state, delta, PCG_DEFAULT_MULTIPLIER_64, PCG_DEFAULT_INCREMENT_64);
}
static inline void pcg_mcg_64_step_r(struct pcg_state_64* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_64;
}
static inline void pcg_mcg_64_advance_r(struct pcg_state_64* rng, uint64_t delta)
{
rng->state
= pcg_advance_lcg_64(rng->state, delta, PCG_DEFAULT_MULTIPLIER_64, 0u);
}
static inline void pcg_unique_64_step_r(struct pcg_state_64* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_64
+ (uint64_t)(((intptr_t)rng) | 1u);
}
static inline void pcg_unique_64_advance_r(struct pcg_state_64* rng, uint64_t delta)
{
rng->state
= pcg_advance_lcg_64(rng->state, delta, PCG_DEFAULT_MULTIPLIER_64,
(uint64_t)(((intptr_t)rng) | 1u));
}
static inline void pcg_setseq_64_step_r(struct pcg_state_setseq_64* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_64 + rng->inc;
}
static inline void pcg_setseq_64_advance_r(struct pcg_state_setseq_64* rng,
uint64_t delta)
{
rng->state = pcg_advance_lcg_64(rng->state, delta,
PCG_DEFAULT_MULTIPLIER_64, rng->inc);
}
#if PCG_HAS_128BIT_OPS
static inline void pcg_oneseq_128_step_r(struct pcg_state_128* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_128
+ PCG_DEFAULT_INCREMENT_128;
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_oneseq_128_advance_r(struct pcg_state_128* rng, pcg128_t delta)
{
rng->state
= pcg_advance_lcg_128(rng->state, delta, PCG_DEFAULT_MULTIPLIER_128,
PCG_DEFAULT_INCREMENT_128);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_mcg_128_step_r(struct pcg_state_128* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_128;
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_mcg_128_advance_r(struct pcg_state_128* rng, pcg128_t delta)
{
rng->state = pcg_advance_lcg_128(rng->state, delta,
PCG_DEFAULT_MULTIPLIER_128, 0u);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_unique_128_step_r(struct pcg_state_128* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_128
+ (pcg128_t)(((intptr_t)rng) | 1u);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_unique_128_advance_r(struct pcg_state_128* rng, pcg128_t delta)
{
rng->state
= pcg_advance_lcg_128(rng->state, delta, PCG_DEFAULT_MULTIPLIER_128,
(pcg128_t)(((intptr_t)rng) | 1u));
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_setseq_128_step_r(struct pcg_state_setseq_128* rng)
{
rng->state = rng->state * PCG_DEFAULT_MULTIPLIER_128 + rng->inc;
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_setseq_128_advance_r(struct pcg_state_setseq_128* rng,
pcg128_t delta)
{
rng->state = pcg_advance_lcg_128(rng->state, delta,
PCG_DEFAULT_MULTIPLIER_128, rng->inc);
}
#endif
/* Functions to seed the RNG state, one version for each size and each
* style. Unlike the step functions, regular users can and should call
* these functions.
*/
static inline void pcg_oneseq_8_srandom_r(struct pcg_state_8* rng, uint8_t initstate)
{
rng->state = 0U;
pcg_oneseq_8_step_r(rng);
rng->state += initstate;
pcg_oneseq_8_step_r(rng);
}
static inline void pcg_mcg_8_srandom_r(struct pcg_state_8* rng, uint8_t initstate)
{
rng->state = initstate | 1u;
}
static inline void pcg_unique_8_srandom_r(struct pcg_state_8* rng, uint8_t initstate)
{
rng->state = 0U;
pcg_unique_8_step_r(rng);
rng->state += initstate;
pcg_unique_8_step_r(rng);
}
static inline void pcg_setseq_8_srandom_r(struct pcg_state_setseq_8* rng,
uint8_t initstate, uint8_t initseq)
{
rng->state = 0U;
rng->inc = (initseq << 1u) | 1u;
pcg_setseq_8_step_r(rng);
rng->state += initstate;
pcg_setseq_8_step_r(rng);
}
static inline void pcg_oneseq_16_srandom_r(struct pcg_state_16* rng,
uint16_t initstate)
{
rng->state = 0U;
pcg_oneseq_16_step_r(rng);
rng->state += initstate;
pcg_oneseq_16_step_r(rng);
}
static inline void pcg_mcg_16_srandom_r(struct pcg_state_16* rng, uint16_t initstate)
{
rng->state = initstate | 1u;
}
static inline void pcg_unique_16_srandom_r(struct pcg_state_16* rng,
uint16_t initstate)
{
rng->state = 0U;
pcg_unique_16_step_r(rng);
rng->state += initstate;
pcg_unique_16_step_r(rng);
}
static inline void pcg_setseq_16_srandom_r(struct pcg_state_setseq_16* rng,
uint16_t initstate, uint16_t initseq)
{
rng->state = 0U;
rng->inc = (initseq << 1u) | 1u;
pcg_setseq_16_step_r(rng);
rng->state += initstate;
pcg_setseq_16_step_r(rng);
}
static inline void pcg_oneseq_32_srandom_r(struct pcg_state_32* rng,
uint32_t initstate)
{
rng->state = 0U;
pcg_oneseq_32_step_r(rng);
rng->state += initstate;
pcg_oneseq_32_step_r(rng);
}
static inline void pcg_mcg_32_srandom_r(struct pcg_state_32* rng, uint32_t initstate)
{
rng->state = initstate | 1u;
}
static inline void pcg_unique_32_srandom_r(struct pcg_state_32* rng,
uint32_t initstate)
{
rng->state = 0U;
pcg_unique_32_step_r(rng);
rng->state += initstate;
pcg_unique_32_step_r(rng);
}
static inline void pcg_setseq_32_srandom_r(struct pcg_state_setseq_32* rng,
uint32_t initstate, uint32_t initseq)
{
rng->state = 0U;
rng->inc = (initseq << 1u) | 1u;
pcg_setseq_32_step_r(rng);
rng->state += initstate;
pcg_setseq_32_step_r(rng);
}
static inline void pcg_oneseq_64_srandom_r(struct pcg_state_64* rng,
uint64_t initstate)
{
rng->state = 0U;
pcg_oneseq_64_step_r(rng);
rng->state += initstate;
pcg_oneseq_64_step_r(rng);
}
static inline void pcg_mcg_64_srandom_r(struct pcg_state_64* rng, uint64_t initstate)
{
rng->state = initstate | 1u;
}
static inline void pcg_unique_64_srandom_r(struct pcg_state_64* rng,
uint64_t initstate)
{
rng->state = 0U;
pcg_unique_64_step_r(rng);
rng->state += initstate;
pcg_unique_64_step_r(rng);
}
static inline void pcg_setseq_64_srandom_r(struct pcg_state_setseq_64* rng,
uint64_t initstate, uint64_t initseq)
{
rng->state = 0U;
rng->inc = (initseq << 1u) | 1u;
pcg_setseq_64_step_r(rng);
rng->state += initstate;
pcg_setseq_64_step_r(rng);
}
#if PCG_HAS_128BIT_OPS
static inline void pcg_oneseq_128_srandom_r(struct pcg_state_128* rng,
pcg128_t initstate)
{
rng->state = 0U;
pcg_oneseq_128_step_r(rng);
rng->state += initstate;
pcg_oneseq_128_step_r(rng);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_mcg_128_srandom_r(struct pcg_state_128* rng, pcg128_t initstate)
{
rng->state = initstate | 1u;
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_unique_128_srandom_r(struct pcg_state_128* rng,
pcg128_t initstate)
{
rng->state = 0U;
pcg_unique_128_step_r(rng);
rng->state += initstate;
pcg_unique_128_step_r(rng);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline void pcg_setseq_128_srandom_r(struct pcg_state_setseq_128* rng,
pcg128_t initstate, pcg128_t initseq)
{
rng->state = 0U;
rng->inc = (initseq << 1u) | 1u;
pcg_setseq_128_step_r(rng);
rng->state += initstate;
pcg_setseq_128_step_r(rng);
}
#endif
/* Now, finally we create each of the individual generators. We provide
* a random_r function that provides a random number of the appropriate
* type (using the full range of the type) and a boundedrand_r version
* that provides
*
* Implementation notes for boundedrand_r:
*
* To avoid bias, we need to make the range of the RNG a multiple of
* bound, which we do by dropping output less than a threshold.
* Let's consider a 32-bit case... A naive scheme to calculate the
* threshold would be to do
*
* uint32_t threshold = 0x100000000ull % bound;
*
* but 64-bit div/mod is slower than 32-bit div/mod (especially on
* 32-bit platforms). In essence, we do
*
* uint32_t threshold = (0x100000000ull-bound) % bound;
*
* because this version will calculate the same modulus, but the LHS
* value is less than 2^32.
*
* (Note that using modulo is only wise for good RNGs, poorer RNGs
* such as raw LCGs do better using a technique based on division.)
* Empricical tests show that division is preferable to modulus for
* reducting the range of an RNG. It's faster, and sometimes it can
* even be statistically prefereable.
*/
/* Generation functions for XSH RS */
static inline uint8_t pcg_oneseq_16_xsh_rs_8_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_oneseq_16_step_r(rng);
return pcg_output_xsh_rs_16_8(oldstate);
}
static inline uint8_t pcg_oneseq_16_xsh_rs_8_boundedrand_r(struct pcg_state_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_oneseq_16_xsh_rs_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_oneseq_32_xsh_rs_16_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_oneseq_32_step_r(rng);
return pcg_output_xsh_rs_32_16(oldstate);
}
static inline uint16_t pcg_oneseq_32_xsh_rs_16_boundedrand_r(struct pcg_state_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_oneseq_32_xsh_rs_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_oneseq_64_xsh_rs_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_oneseq_64_step_r(rng);
return pcg_output_xsh_rs_64_32(oldstate);
}
static inline uint32_t pcg_oneseq_64_xsh_rs_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_oneseq_64_xsh_rs_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_oneseq_128_xsh_rs_64_random_r(struct pcg_state_128* rng)
{
pcg_oneseq_128_step_r(rng);
return pcg_output_xsh_rs_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_oneseq_128_xsh_rs_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_oneseq_128_xsh_rs_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_unique_16_xsh_rs_8_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_unique_16_step_r(rng);
return pcg_output_xsh_rs_16_8(oldstate);
}
static inline uint8_t pcg_unique_16_xsh_rs_8_boundedrand_r(struct pcg_state_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_unique_16_xsh_rs_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_unique_32_xsh_rs_16_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_unique_32_step_r(rng);
return pcg_output_xsh_rs_32_16(oldstate);
}
static inline uint16_t pcg_unique_32_xsh_rs_16_boundedrand_r(struct pcg_state_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_unique_32_xsh_rs_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_unique_64_xsh_rs_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_unique_64_step_r(rng);
return pcg_output_xsh_rs_64_32(oldstate);
}
static inline uint32_t pcg_unique_64_xsh_rs_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_unique_64_xsh_rs_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_unique_128_xsh_rs_64_random_r(struct pcg_state_128* rng)
{
pcg_unique_128_step_r(rng);
return pcg_output_xsh_rs_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_unique_128_xsh_rs_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_unique_128_xsh_rs_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_setseq_16_xsh_rs_8_random_r(struct pcg_state_setseq_16* rng)
{
uint16_t oldstate = rng->state;
pcg_setseq_16_step_r(rng);
return pcg_output_xsh_rs_16_8(oldstate);
}
static inline uint8_t
pcg_setseq_16_xsh_rs_8_boundedrand_r(struct pcg_state_setseq_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_setseq_16_xsh_rs_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t
pcg_setseq_32_xsh_rs_16_random_r(struct pcg_state_setseq_32* rng)
{
uint32_t oldstate = rng->state;
pcg_setseq_32_step_r(rng);
return pcg_output_xsh_rs_32_16(oldstate);
}
static inline uint16_t
pcg_setseq_32_xsh_rs_16_boundedrand_r(struct pcg_state_setseq_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_setseq_32_xsh_rs_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t
pcg_setseq_64_xsh_rs_32_random_r(struct pcg_state_setseq_64* rng)
{
uint64_t oldstate = rng->state;
pcg_setseq_64_step_r(rng);
return pcg_output_xsh_rs_64_32(oldstate);
}
static inline uint32_t
pcg_setseq_64_xsh_rs_32_boundedrand_r(struct pcg_state_setseq_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_setseq_64_xsh_rs_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_setseq_128_xsh_rs_64_random_r(struct pcg_state_setseq_128* rng)
{
pcg_setseq_128_step_r(rng);
return pcg_output_xsh_rs_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_setseq_128_xsh_rs_64_boundedrand_r(struct pcg_state_setseq_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_setseq_128_xsh_rs_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_mcg_16_xsh_rs_8_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_mcg_16_step_r(rng);
return pcg_output_xsh_rs_16_8(oldstate);
}
static inline uint8_t pcg_mcg_16_xsh_rs_8_boundedrand_r(struct pcg_state_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_mcg_16_xsh_rs_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_mcg_32_xsh_rs_16_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_mcg_32_step_r(rng);
return pcg_output_xsh_rs_32_16(oldstate);
}
static inline uint16_t pcg_mcg_32_xsh_rs_16_boundedrand_r(struct pcg_state_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_mcg_32_xsh_rs_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_mcg_64_xsh_rs_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_mcg_64_step_r(rng);
return pcg_output_xsh_rs_64_32(oldstate);
}
static inline uint32_t pcg_mcg_64_xsh_rs_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_mcg_64_xsh_rs_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_mcg_128_xsh_rs_64_random_r(struct pcg_state_128* rng)
{
pcg_mcg_128_step_r(rng);
return pcg_output_xsh_rs_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_mcg_128_xsh_rs_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_mcg_128_xsh_rs_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
/* Generation functions for XSH RR */
static inline uint8_t pcg_oneseq_16_xsh_rr_8_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_oneseq_16_step_r(rng);
return pcg_output_xsh_rr_16_8(oldstate);
}
static inline uint8_t pcg_oneseq_16_xsh_rr_8_boundedrand_r(struct pcg_state_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_oneseq_16_xsh_rr_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_oneseq_32_xsh_rr_16_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_oneseq_32_step_r(rng);
return pcg_output_xsh_rr_32_16(oldstate);
}
static inline uint16_t pcg_oneseq_32_xsh_rr_16_boundedrand_r(struct pcg_state_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_oneseq_32_xsh_rr_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_oneseq_64_xsh_rr_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_oneseq_64_step_r(rng);
return pcg_output_xsh_rr_64_32(oldstate);
}
static inline uint32_t pcg_oneseq_64_xsh_rr_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_oneseq_64_xsh_rr_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_oneseq_128_xsh_rr_64_random_r(struct pcg_state_128* rng)
{
pcg_oneseq_128_step_r(rng);
return pcg_output_xsh_rr_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_oneseq_128_xsh_rr_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_oneseq_128_xsh_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_unique_16_xsh_rr_8_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_unique_16_step_r(rng);
return pcg_output_xsh_rr_16_8(oldstate);
}
static inline uint8_t pcg_unique_16_xsh_rr_8_boundedrand_r(struct pcg_state_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_unique_16_xsh_rr_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_unique_32_xsh_rr_16_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_unique_32_step_r(rng);
return pcg_output_xsh_rr_32_16(oldstate);
}
static inline uint16_t pcg_unique_32_xsh_rr_16_boundedrand_r(struct pcg_state_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_unique_32_xsh_rr_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_unique_64_xsh_rr_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_unique_64_step_r(rng);
return pcg_output_xsh_rr_64_32(oldstate);
}
static inline uint32_t pcg_unique_64_xsh_rr_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_unique_64_xsh_rr_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_unique_128_xsh_rr_64_random_r(struct pcg_state_128* rng)
{
pcg_unique_128_step_r(rng);
return pcg_output_xsh_rr_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_unique_128_xsh_rr_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_unique_128_xsh_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_setseq_16_xsh_rr_8_random_r(struct pcg_state_setseq_16* rng)
{
uint16_t oldstate = rng->state;
pcg_setseq_16_step_r(rng);
return pcg_output_xsh_rr_16_8(oldstate);
}
static inline uint8_t
pcg_setseq_16_xsh_rr_8_boundedrand_r(struct pcg_state_setseq_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_setseq_16_xsh_rr_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t
pcg_setseq_32_xsh_rr_16_random_r(struct pcg_state_setseq_32* rng)
{
uint32_t oldstate = rng->state;
pcg_setseq_32_step_r(rng);
return pcg_output_xsh_rr_32_16(oldstate);
}
static inline uint16_t
pcg_setseq_32_xsh_rr_16_boundedrand_r(struct pcg_state_setseq_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_setseq_32_xsh_rr_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t
pcg_setseq_64_xsh_rr_32_random_r(struct pcg_state_setseq_64* rng)
{
uint64_t oldstate = rng->state;
pcg_setseq_64_step_r(rng);
return pcg_output_xsh_rr_64_32(oldstate);
}
static inline uint32_t
pcg_setseq_64_xsh_rr_32_boundedrand_r(struct pcg_state_setseq_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_setseq_64_xsh_rr_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_setseq_128_xsh_rr_64_random_r(struct pcg_state_setseq_128* rng)
{
pcg_setseq_128_step_r(rng);
return pcg_output_xsh_rr_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_setseq_128_xsh_rr_64_boundedrand_r(struct pcg_state_setseq_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_setseq_128_xsh_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_mcg_16_xsh_rr_8_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_mcg_16_step_r(rng);
return pcg_output_xsh_rr_16_8(oldstate);
}
static inline uint8_t pcg_mcg_16_xsh_rr_8_boundedrand_r(struct pcg_state_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_mcg_16_xsh_rr_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_mcg_32_xsh_rr_16_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_mcg_32_step_r(rng);
return pcg_output_xsh_rr_32_16(oldstate);
}
static inline uint16_t pcg_mcg_32_xsh_rr_16_boundedrand_r(struct pcg_state_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_mcg_32_xsh_rr_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_mcg_64_xsh_rr_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_mcg_64_step_r(rng);
return pcg_output_xsh_rr_64_32(oldstate);
}
static inline uint32_t pcg_mcg_64_xsh_rr_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_mcg_64_xsh_rr_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_mcg_128_xsh_rr_64_random_r(struct pcg_state_128* rng)
{
pcg_mcg_128_step_r(rng);
return pcg_output_xsh_rr_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_mcg_128_xsh_rr_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_mcg_128_xsh_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
/* Generation functions for RXS M XS (no MCG versions because they
* don't make sense when you want to use the entire state)
*/
static inline uint8_t pcg_oneseq_8_rxs_m_xs_8_random_r(struct pcg_state_8* rng)
{
uint8_t oldstate = rng->state;
pcg_oneseq_8_step_r(rng);
return pcg_output_rxs_m_xs_8_8(oldstate);
}
static inline uint8_t pcg_oneseq_8_rxs_m_xs_8_boundedrand_r(struct pcg_state_8* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_oneseq_8_rxs_m_xs_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_oneseq_16_rxs_m_xs_16_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_oneseq_16_step_r(rng);
return pcg_output_rxs_m_xs_16_16(oldstate);
}
static inline uint16_t
pcg_oneseq_16_rxs_m_xs_16_boundedrand_r(struct pcg_state_16* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_oneseq_16_rxs_m_xs_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_oneseq_32_rxs_m_xs_32_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_oneseq_32_step_r(rng);
return pcg_output_rxs_m_xs_32_32(oldstate);
}
static inline uint32_t
pcg_oneseq_32_rxs_m_xs_32_boundedrand_r(struct pcg_state_32* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_oneseq_32_rxs_m_xs_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint64_t pcg_oneseq_64_rxs_m_xs_64_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_oneseq_64_step_r(rng);
return pcg_output_rxs_m_xs_64_64(oldstate);
}
static inline uint64_t
pcg_oneseq_64_rxs_m_xs_64_boundedrand_r(struct pcg_state_64* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_oneseq_64_rxs_m_xs_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline pcg128_t pcg_oneseq_128_rxs_m_xs_128_random_r(struct pcg_state_128* rng)
{
pcg_oneseq_128_step_r(rng);
return pcg_output_rxs_m_xs_128_128(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline pcg128_t
pcg_oneseq_128_rxs_m_xs_128_boundedrand_r(struct pcg_state_128* rng,
pcg128_t bound)
{
pcg128_t threshold = -bound % bound;
for (;;) {
pcg128_t r = pcg_oneseq_128_rxs_m_xs_128_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint16_t pcg_unique_16_rxs_m_xs_16_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_unique_16_step_r(rng);
return pcg_output_rxs_m_xs_16_16(oldstate);
}
static inline uint16_t
pcg_unique_16_rxs_m_xs_16_boundedrand_r(struct pcg_state_16* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_unique_16_rxs_m_xs_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_unique_32_rxs_m_xs_32_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_unique_32_step_r(rng);
return pcg_output_rxs_m_xs_32_32(oldstate);
}
static inline uint32_t
pcg_unique_32_rxs_m_xs_32_boundedrand_r(struct pcg_state_32* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_unique_32_rxs_m_xs_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint64_t pcg_unique_64_rxs_m_xs_64_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_unique_64_step_r(rng);
return pcg_output_rxs_m_xs_64_64(oldstate);
}
static inline uint64_t
pcg_unique_64_rxs_m_xs_64_boundedrand_r(struct pcg_state_64* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_unique_64_rxs_m_xs_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline pcg128_t pcg_unique_128_rxs_m_xs_128_random_r(struct pcg_state_128* rng)
{
pcg_unique_128_step_r(rng);
return pcg_output_rxs_m_xs_128_128(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline pcg128_t
pcg_unique_128_rxs_m_xs_128_boundedrand_r(struct pcg_state_128* rng,
pcg128_t bound)
{
pcg128_t threshold = -bound % bound;
for (;;) {
pcg128_t r = pcg_unique_128_rxs_m_xs_128_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_setseq_8_rxs_m_xs_8_random_r(struct pcg_state_setseq_8* rng)
{
uint8_t oldstate = rng->state;
pcg_setseq_8_step_r(rng);
return pcg_output_rxs_m_xs_8_8(oldstate);
}
static inline uint8_t
pcg_setseq_8_rxs_m_xs_8_boundedrand_r(struct pcg_state_setseq_8* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_setseq_8_rxs_m_xs_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t
pcg_setseq_16_rxs_m_xs_16_random_r(struct pcg_state_setseq_16* rng)
{
uint16_t oldstate = rng->state;
pcg_setseq_16_step_r(rng);
return pcg_output_rxs_m_xs_16_16(oldstate);
}
static inline uint16_t
pcg_setseq_16_rxs_m_xs_16_boundedrand_r(struct pcg_state_setseq_16* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_setseq_16_rxs_m_xs_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t
pcg_setseq_32_rxs_m_xs_32_random_r(struct pcg_state_setseq_32* rng)
{
uint32_t oldstate = rng->state;
pcg_setseq_32_step_r(rng);
return pcg_output_rxs_m_xs_32_32(oldstate);
}
static inline uint32_t
pcg_setseq_32_rxs_m_xs_32_boundedrand_r(struct pcg_state_setseq_32* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_setseq_32_rxs_m_xs_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint64_t
pcg_setseq_64_rxs_m_xs_64_random_r(struct pcg_state_setseq_64* rng)
{
uint64_t oldstate = rng->state;
pcg_setseq_64_step_r(rng);
return pcg_output_rxs_m_xs_64_64(oldstate);
}
static inline uint64_t
pcg_setseq_64_rxs_m_xs_64_boundedrand_r(struct pcg_state_setseq_64* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_setseq_64_rxs_m_xs_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline pcg128_t
pcg_setseq_128_rxs_m_xs_128_random_r(struct pcg_state_setseq_128* rng)
{
pcg_setseq_128_step_r(rng);
return pcg_output_rxs_m_xs_128_128(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline pcg128_t
pcg_setseq_128_rxs_m_xs_128_boundedrand_r(struct pcg_state_setseq_128* rng,
pcg128_t bound)
{
pcg128_t threshold = -bound % bound;
for (;;) {
pcg128_t r = pcg_setseq_128_rxs_m_xs_128_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
/* Generation functions for RXS M */
static inline uint8_t pcg_oneseq_16_rxs_m_8_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_oneseq_16_step_r(rng);
return pcg_output_rxs_m_16_8(oldstate);
}
static inline uint8_t pcg_oneseq_16_rxs_m_8_boundedrand_r(struct pcg_state_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_oneseq_16_rxs_m_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_oneseq_32_rxs_m_16_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_oneseq_32_step_r(rng);
return pcg_output_rxs_m_32_16(oldstate);
}
static inline uint16_t pcg_oneseq_32_rxs_m_16_boundedrand_r(struct pcg_state_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_oneseq_32_rxs_m_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_oneseq_64_rxs_m_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_oneseq_64_step_r(rng);
return pcg_output_rxs_m_64_32(oldstate);
}
static inline uint32_t pcg_oneseq_64_rxs_m_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_oneseq_64_rxs_m_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_oneseq_128_rxs_m_64_random_r(struct pcg_state_128* rng)
{
pcg_oneseq_128_step_r(rng);
return pcg_output_rxs_m_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_oneseq_128_rxs_m_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_oneseq_128_rxs_m_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_unique_16_rxs_m_8_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_unique_16_step_r(rng);
return pcg_output_rxs_m_16_8(oldstate);
}
static inline uint8_t pcg_unique_16_rxs_m_8_boundedrand_r(struct pcg_state_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_unique_16_rxs_m_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_unique_32_rxs_m_16_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_unique_32_step_r(rng);
return pcg_output_rxs_m_32_16(oldstate);
}
static inline uint16_t pcg_unique_32_rxs_m_16_boundedrand_r(struct pcg_state_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_unique_32_rxs_m_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_unique_64_rxs_m_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_unique_64_step_r(rng);
return pcg_output_rxs_m_64_32(oldstate);
}
static inline uint32_t pcg_unique_64_rxs_m_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_unique_64_rxs_m_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_unique_128_rxs_m_64_random_r(struct pcg_state_128* rng)
{
pcg_unique_128_step_r(rng);
return pcg_output_rxs_m_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_unique_128_rxs_m_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_unique_128_rxs_m_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_setseq_16_rxs_m_8_random_r(struct pcg_state_setseq_16* rng)
{
uint16_t oldstate = rng->state;
pcg_setseq_16_step_r(rng);
return pcg_output_rxs_m_16_8(oldstate);
}
static inline uint8_t
pcg_setseq_16_rxs_m_8_boundedrand_r(struct pcg_state_setseq_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_setseq_16_rxs_m_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_setseq_32_rxs_m_16_random_r(struct pcg_state_setseq_32* rng)
{
uint32_t oldstate = rng->state;
pcg_setseq_32_step_r(rng);
return pcg_output_rxs_m_32_16(oldstate);
}
static inline uint16_t
pcg_setseq_32_rxs_m_16_boundedrand_r(struct pcg_state_setseq_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_setseq_32_rxs_m_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_setseq_64_rxs_m_32_random_r(struct pcg_state_setseq_64* rng)
{
uint64_t oldstate = rng->state;
pcg_setseq_64_step_r(rng);
return pcg_output_rxs_m_64_32(oldstate);
}
static inline uint32_t
pcg_setseq_64_rxs_m_32_boundedrand_r(struct pcg_state_setseq_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_setseq_64_rxs_m_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_setseq_128_rxs_m_64_random_r(struct pcg_state_setseq_128* rng)
{
pcg_setseq_128_step_r(rng);
return pcg_output_rxs_m_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_setseq_128_rxs_m_64_boundedrand_r(struct pcg_state_setseq_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_setseq_128_rxs_m_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint8_t pcg_mcg_16_rxs_m_8_random_r(struct pcg_state_16* rng)
{
uint16_t oldstate = rng->state;
pcg_mcg_16_step_r(rng);
return pcg_output_rxs_m_16_8(oldstate);
}
static inline uint8_t pcg_mcg_16_rxs_m_8_boundedrand_r(struct pcg_state_16* rng,
uint8_t bound)
{
uint8_t threshold = ((uint8_t)(-bound)) % bound;
for (;;) {
uint8_t r = pcg_mcg_16_rxs_m_8_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint16_t pcg_mcg_32_rxs_m_16_random_r(struct pcg_state_32* rng)
{
uint32_t oldstate = rng->state;
pcg_mcg_32_step_r(rng);
return pcg_output_rxs_m_32_16(oldstate);
}
static inline uint16_t pcg_mcg_32_rxs_m_16_boundedrand_r(struct pcg_state_32* rng,
uint16_t bound)
{
uint16_t threshold = ((uint16_t)(-bound)) % bound;
for (;;) {
uint16_t r = pcg_mcg_32_rxs_m_16_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
static inline uint32_t pcg_mcg_64_rxs_m_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_mcg_64_step_r(rng);
return pcg_output_rxs_m_64_32(oldstate);
}
static inline uint32_t pcg_mcg_64_rxs_m_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_mcg_64_rxs_m_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_mcg_128_rxs_m_64_random_r(struct pcg_state_128* rng)
{
pcg_mcg_128_step_r(rng);
return pcg_output_rxs_m_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_mcg_128_rxs_m_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_mcg_128_rxs_m_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
/* Generation functions for XSL RR (only defined for "large" types) */
static inline uint32_t pcg_oneseq_64_xsl_rr_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_oneseq_64_step_r(rng);
return pcg_output_xsl_rr_64_32(oldstate);
}
static inline uint32_t pcg_oneseq_64_xsl_rr_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_oneseq_64_xsl_rr_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_oneseq_128_xsl_rr_64_random_r(struct pcg_state_128* rng)
{
pcg_oneseq_128_step_r(rng);
return pcg_output_xsl_rr_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_oneseq_128_xsl_rr_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_oneseq_128_xsl_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint32_t pcg_unique_64_xsl_rr_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_unique_64_step_r(rng);
return pcg_output_xsl_rr_64_32(oldstate);
}
static inline uint32_t pcg_unique_64_xsl_rr_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_unique_64_xsl_rr_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_unique_128_xsl_rr_64_random_r(struct pcg_state_128* rng)
{
pcg_unique_128_step_r(rng);
return pcg_output_xsl_rr_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_unique_128_xsl_rr_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_unique_128_xsl_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint32_t
pcg_setseq_64_xsl_rr_32_random_r(struct pcg_state_setseq_64* rng)
{
uint64_t oldstate = rng->state;
pcg_setseq_64_step_r(rng);
return pcg_output_xsl_rr_64_32(oldstate);
}
static inline uint32_t
pcg_setseq_64_xsl_rr_32_boundedrand_r(struct pcg_state_setseq_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_setseq_64_xsl_rr_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_setseq_128_xsl_rr_64_random_r(struct pcg_state_setseq_128* rng)
{
pcg_setseq_128_step_r(rng);
return pcg_output_xsl_rr_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t
pcg_setseq_128_xsl_rr_64_boundedrand_r(struct pcg_state_setseq_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_setseq_128_xsl_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint32_t pcg_mcg_64_xsl_rr_32_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_mcg_64_step_r(rng);
return pcg_output_xsl_rr_64_32(oldstate);
}
static inline uint32_t pcg_mcg_64_xsl_rr_32_boundedrand_r(struct pcg_state_64* rng,
uint32_t bound)
{
uint32_t threshold = -bound % bound;
for (;;) {
uint32_t r = pcg_mcg_64_xsl_rr_32_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_mcg_128_xsl_rr_64_random_r(struct pcg_state_128* rng)
{
pcg_mcg_128_step_r(rng);
return pcg_output_xsl_rr_128_64(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline uint64_t pcg_mcg_128_xsl_rr_64_boundedrand_r(struct pcg_state_128* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_mcg_128_xsl_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
/* Generation functions for XSL RR RR (only defined for "large" types) */
static inline uint64_t pcg_oneseq_64_xsl_rr_rr_64_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_oneseq_64_step_r(rng);
return pcg_output_xsl_rr_rr_64_64(oldstate);
}
static inline uint64_t
pcg_oneseq_64_xsl_rr_rr_64_boundedrand_r(struct pcg_state_64* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_oneseq_64_xsl_rr_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline pcg128_t pcg_oneseq_128_xsl_rr_rr_128_random_r(struct pcg_state_128* rng)
{
pcg_oneseq_128_step_r(rng);
return pcg_output_xsl_rr_rr_128_128(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline pcg128_t
pcg_oneseq_128_xsl_rr_rr_128_boundedrand_r(struct pcg_state_128* rng,
pcg128_t bound)
{
pcg128_t threshold = -bound % bound;
for (;;) {
pcg128_t r = pcg_oneseq_128_xsl_rr_rr_128_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint64_t pcg_unique_64_xsl_rr_rr_64_random_r(struct pcg_state_64* rng)
{
uint64_t oldstate = rng->state;
pcg_unique_64_step_r(rng);
return pcg_output_xsl_rr_rr_64_64(oldstate);
}
static inline uint64_t
pcg_unique_64_xsl_rr_rr_64_boundedrand_r(struct pcg_state_64* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_unique_64_xsl_rr_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline pcg128_t pcg_unique_128_xsl_rr_rr_128_random_r(struct pcg_state_128* rng)
{
pcg_unique_128_step_r(rng);
return pcg_output_xsl_rr_rr_128_128(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline pcg128_t
pcg_unique_128_xsl_rr_rr_128_boundedrand_r(struct pcg_state_128* rng,
pcg128_t bound)
{
pcg128_t threshold = -bound % bound;
for (;;) {
pcg128_t r = pcg_unique_128_xsl_rr_rr_128_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
static inline uint64_t
pcg_setseq_64_xsl_rr_rr_64_random_r(struct pcg_state_setseq_64* rng)
{
uint64_t oldstate = rng->state;
pcg_setseq_64_step_r(rng);
return pcg_output_xsl_rr_rr_64_64(oldstate);
}
static inline uint64_t
pcg_setseq_64_xsl_rr_rr_64_boundedrand_r(struct pcg_state_setseq_64* rng,
uint64_t bound)
{
uint64_t threshold = -bound % bound;
for (;;) {
uint64_t r = pcg_setseq_64_xsl_rr_rr_64_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#if PCG_HAS_128BIT_OPS
static inline pcg128_t
pcg_setseq_128_xsl_rr_rr_128_random_r(struct pcg_state_setseq_128* rng)
{
pcg_setseq_128_step_r(rng);
return pcg_output_xsl_rr_rr_128_128(rng->state);
}
#endif
#if PCG_HAS_128BIT_OPS
static inline pcg128_t
pcg_setseq_128_xsl_rr_rr_128_boundedrand_r(struct pcg_state_setseq_128* rng,
pcg128_t bound)
{
pcg128_t threshold = -bound % bound;
for (;;) {
pcg128_t r = pcg_setseq_128_xsl_rr_rr_128_random_r(rng);
if (r >= threshold)
return r % bound;
}
}
#endif
/*** Typedefs */
typedef struct pcg_state_setseq_64 pcg32_random_t;
typedef struct pcg_state_64 pcg32s_random_t;
typedef struct pcg_state_64 pcg32u_random_t;
typedef struct pcg_state_64 pcg32f_random_t;
/*** random_r */
#define pcg32_random_r pcg_setseq_64_xsh_rr_32_random_r
#define pcg32s_random_r pcg_oneseq_64_xsh_rr_32_random_r
#define pcg32u_random_r pcg_unique_64_xsh_rr_32_random_r
#define pcg32f_random_r pcg_mcg_64_xsh_rs_32_random_r
/*** boundedrand_r */
#define pcg32_boundedrand_r pcg_setseq_64_xsh_rr_32_boundedrand_r
#define pcg32s_boundedrand_r pcg_oneseq_64_xsh_rr_32_boundedrand_r
#define pcg32u_boundedrand_r pcg_unique_64_xsh_rr_32_boundedrand_r
#define pcg32f_boundedrand_r pcg_mcg_64_xsh_rs_32_boundedrand_r
/*** srandom_r */
#define pcg32_srandom_r pcg_setseq_64_srandom_r
#define pcg32s_srandom_r pcg_oneseq_64_srandom_r
#define pcg32u_srandom_r pcg_unique_64_srandom_r
#define pcg32f_srandom_r pcg_mcg_64_srandom_r
/*** advance_r */
#define pcg32_advance_r pcg_setseq_64_advance_r
#define pcg32s_advance_r pcg_oneseq_64_advance_r
#define pcg32u_advance_r pcg_unique_64_advance_r
#define pcg32f_advance_r pcg_mcg_64_advance_r
#if PCG_HAS_128BIT_OPS
/*** Typedefs */
typedef struct pcg_state_setseq_128 pcg64_random_t;
typedef struct pcg_state_128 pcg64s_random_t;
typedef struct pcg_state_128 pcg64u_random_t;
typedef struct pcg_state_128 pcg64f_random_t;
/*** random_r */
#define pcg64_random_r pcg_setseq_128_xsl_rr_64_random_r
#define pcg64s_random_r pcg_oneseq_128_xsl_rr_64_random_r
#define pcg64u_random_r pcg_unique_128_xsl_rr_64_random_r
#define pcg64f_random_r pcg_mcg_128_xsl_rr_64_random_r
/*** boundedrand_r */
#define pcg64_boundedrand_r pcg_setseq_128_xsl_rr_64_boundedrand_r
#define pcg64s_boundedrand_r pcg_oneseq_128_xsl_rr_64_boundedrand_r
#define pcg64u_boundedrand_r pcg_unique_128_xsl_rr_64_boundedrand_r
#define pcg64f_boundedrand_r pcg_mcg_128_xsl_rr_64_boundedrand_r
/*** srandom_r */
#define pcg64_srandom_r pcg_setseq_128_srandom_r
#define pcg64s_srandom_r pcg_oneseq_128_srandom_r
#define pcg64u_srandom_r pcg_unique_128_srandom_r
#define pcg64f_srandom_r pcg_mcg_128_srandom_r
/*** advance_r */
#define pcg64_advance_r pcg_setseq_128_advance_r
#define pcg64s_advance_r pcg_oneseq_128_advance_r
#define pcg64u_advance_r pcg_unique_128_advance_r
#define pcg64f_advance_r pcg_mcg_128_advance_r
#endif
/*** Typedefs */
typedef struct pcg_state_8 pcg8si_random_t;
typedef struct pcg_state_16 pcg16si_random_t;
typedef struct pcg_state_32 pcg32si_random_t;
typedef struct pcg_state_64 pcg64si_random_t;
/*** random_r */
#define pcg8si_random_r pcg_oneseq_8_rxs_m_xs_8_random_r
#define pcg16si_random_r pcg_oneseq_16_rxs_m_xs_16_random_r
#define pcg32si_random_r pcg_oneseq_32_rxs_m_xs_32_random_r
#define pcg64si_random_r pcg_oneseq_64_rxs_m_xs_64_random_r
/*** boundedrand_r */
#define pcg8si_boundedrand_r pcg_oneseq_8_rxs_m_xs_8_boundedrand_r
#define pcg16si_boundedrand_r pcg_oneseq_16_rxs_m_xs_16_boundedrand_r
#define pcg32si_boundedrand_r pcg_oneseq_32_rxs_m_xs_32_boundedrand_r
#define pcg64si_boundedrand_r pcg_oneseq_64_rxs_m_xs_64_boundedrand_r
/*** srandom_r */
#define pcg8si_srandom_r pcg_oneseq_8_srandom_r
#define pcg16si_srandom_r pcg_oneseq_16_srandom_r
#define pcg32si_srandom_r pcg_oneseq_32_srandom_r
#define pcg64si_srandom_r pcg_oneseq_64_srandom_r
/*** advance_r */
#define pcg8si_advance_r pcg_oneseq_8_advance_r
#define pcg16si_advance_r pcg_oneseq_16_advance_r
#define pcg32si_advance_r pcg_oneseq_32_advance_r
#define pcg64si_advance_r pcg_oneseq_64_advance_r
#if PCG_HAS_128BIT_OPS
typedef struct pcg_state_128 pcg128si_random_t;
#define pcg128si_random_r pcg_oneseq_128_rxs_m_xs_128_random_r
#define pcg128si_boundedrand_r pcg_oneseq_128_rxs_m_xs_128_boundedrand_r
#define pcg128si_srandom_r pcg_oneseq_128_srandom_r
#define pcg128si_advance_r pcg_oneseq_128_advance_r
#endif
/*** Typedefs */
typedef struct pcg_state_setseq_8 pcg8i_random_t;
typedef struct pcg_state_setseq_16 pcg16i_random_t;
typedef struct pcg_state_setseq_32 pcg32i_random_t;
typedef struct pcg_state_setseq_64 pcg64i_random_t;
/*** random_r */
#define pcg8i_random_r pcg_setseq_8_rxs_m_xs_8_random_r
#define pcg16i_random_r pcg_setseq_16_rxs_m_xs_16_random_r
#define pcg32i_random_r pcg_setseq_32_rxs_m_xs_32_random_r
#define pcg64i_random_r pcg_setseq_64_rxs_m_xs_64_random_r
/*** boundedrand_r */
#define pcg8i_boundedrand_r pcg_setseq_8_rxs_m_xs_8_boundedrand_r
#define pcg16i_boundedrand_r pcg_setseq_16_rxs_m_xs_16_boundedrand_r
#define pcg32i_boundedrand_r pcg_setseq_32_rxs_m_xs_32_boundedrand_r
#define pcg64i_boundedrand_r pcg_setseq_64_rxs_m_xs_64_boundedrand_r
/*** srandom_r */
#define pcg8i_srandom_r pcg_setseq_8_srandom_r
#define pcg16i_srandom_r pcg_setseq_16_srandom_r
#define pcg32i_srandom_r pcg_setseq_32_srandom_r
#define pcg64i_srandom_r pcg_setseq_64_srandom_r
/*** advance_r */
#define pcg8i_advance_r pcg_setseq_8_advance_r
#define pcg16i_advance_r pcg_setseq_16_advance_r
#define pcg32i_advance_r pcg_setseq_32_advance_r
#define pcg64i_advance_r pcg_setseq_64_advance_r
#if PCG_HAS_128BIT_OPS
typedef struct pcg_state_setseq_128 pcg128i_random_t;
#define pcg128i_random_r pcg_setseq_128_rxs_m_xs_128_random_r
#define pcg128i_boundedrand_r pcg_setseq_128_rxs_m_xs_128_boundedrand_r
#define pcg128i_srandom_r pcg_setseq_128_srandom_r
#define pcg128i_advance_r pcg_setseq_128_advance_r
#endif
/*
* Static initialization constants (if you can't call srandom for some
* bizarre reason).
*/
#define PCG32_INITIALIZER PCG_STATE_SETSEQ_64_INITIALIZER
#define PCG32U_INITIALIZER PCG_STATE_UNIQUE_64_INITIALIZER
#define PCG32S_INITIALIZER PCG_STATE_ONESEQ_64_INITIALIZER
#define PCG32F_INITIALIZER PCG_STATE_MCG_64_INITIALIZER
#if PCG_HAS_128BIT_OPS
#define PCG64_INITIALIZER PCG_STATE_SETSEQ_128_INITIALIZER
#define PCG64U_INITIALIZER PCG_STATE_UNIQUE_128_INITIALIZER
#define PCG64S_INITIALIZER PCG_STATE_ONESEQ_128_INITIALIZER
#define PCG64F_INITIALIZER PCG_STATE_MCG_128_INITIALIZER
#endif
#define PCG8SI_INITIALIZER PCG_STATE_ONESEQ_8_INITIALIZER
#define PCG16SI_INITIALIZER PCG_STATE_ONESEQ_16_INITIALIZER
#define PCG32SI_INITIALIZER PCG_STATE_ONESEQ_32_INITIALIZER
#define PCG64SI_INITIALIZER PCG_STATE_ONESEQ_64_INITIALIZER
#if PCG_HAS_128BIT_OPS
#define PCG128SI_INITIALIZER PCG_STATE_ONESEQ_128_INITIALIZER
#endif
#define PCG8I_INITIALIZER PCG_STATE_SETSEQ_8_INITIALIZER
#define PCG16I_INITIALIZER PCG_STATE_SETSEQ_16_INITIALIZER
#define PCG32I_INITIALIZER PCG_STATE_SETSEQ_32_INITIALIZER
#define PCG64I_INITIALIZER PCG_STATE_SETSEQ_64_INITIALIZER
#if PCG_HAS_128BIT_OPS
#define PCG128I_INITIALIZER PCG_STATE_SETSEQ_128_INITIALIZER
#endif
#ifdef __cplusplus
}
#endif
#endif /* PCG_VARIANTS_H_INCLUDED */
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