#include <stdio.h>
#include <string.h>
#include <cuda.h>

#define THREADS_PER_BLOCK 256

__global__ void best_shuffle(const char *s, char *r, int *diff, int n);
__device__ void update_buf(int *cnt, char *buf);
__device__ int find_max(const char *s, int *cnt, int n);

char * get_input_word(int argc, char *argv[]);

/*
 * Main
 */

int main(int argc, char *argv[]){
        
    char *t = get_input_word(argc, argv);
    printf("\nword: %s\n", t);
    int n = strlen(t);
    int blocks, *diff;
    char *r;

    float total_time, comp_time;
    cudaEvent_t total_start, total_stop, comp_start, comp_stop;
    cudaEventCreate(&total_start);
  	cudaEventCreate(&total_stop);
  	cudaEventCreate(&comp_start);
    cudaEventCreate(&comp_stop);

    /*
     * Memory allocation on host
     */
    r = strdup(t);
    diff = (int *)calloc(1, sizeof(int));

    /*
     * Memory allocation on device
     */
    char *t_dev, *r_dev;
    int *diff_dev;
    cudaMalloc(&r_dev, strlen(t)*sizeof(char));
    cudaMalloc(&t_dev, strlen(t)*sizeof(char));
    cudaMalloc(&diff_dev, 1*sizeof(int));
      
    cudaEventRecord(total_start);
  
    /*
    * Copy array from host memory to device memory
    */
    cudaMemcpy(t_dev, t, strlen(t)*sizeof(char), cudaMemcpyHostToDevice);
    cudaMemcpy(r_dev, t, strlen(t)*sizeof(char), cudaMemcpyHostToDevice);
 
    cudaEventRecord(comp_start);

    /*
    * Create sufficient blocks
    */
    blocks = (n + THREADS_PER_BLOCK - 1)/THREADS_PER_BLOCK;
 
    /*
    * Kernel call
    */ 
    best_shuffle<<< blocks, THREADS_PER_BLOCK >>>(t_dev, r_dev, diff_dev, n);
  
    cudaEventRecord(comp_stop);
    cudaEventSynchronize(comp_stop);
    cudaEventElapsedTime(&comp_time, comp_start, comp_stop);
  
    /*
    * Copy c from host device memory to host memory
    */
    cudaMemcpy(r, r_dev, strlen(t)*sizeof(char), cudaMemcpyDeviceToHost);
    cudaMemcpy(diff, diff_dev, 1*sizeof(int), cudaMemcpyDeviceToHost);
     
    cudaEventRecord(total_stop);
    cudaEventSynchronize(total_stop);
    cudaEventElapsedTime(&total_time, total_start, total_stop);
 
    /*
    * Free memory on device
    */
    cudaFree(diff_dev);
    cudaFree(r_dev);
    cudaFree(t_dev);
    cudaEventDestroy(comp_start);
    cudaEventDestroy(comp_stop);
    cudaEventDestroy(total_start);
    cudaEventDestroy(total_stop);
         
    /*
    * GPU timing
    */
    printf("N: %d, blocks: %d, total_threads: %d\n", n, blocks, THREADS_PER_BLOCK*blocks);
    printf("Total time (ms): %f\n", total_time);
    printf("Kernel time (ms): %f\n", comp_time);
    printf("Data transfer time (ms): %f\n", total_time-comp_time);

    /*
    * Initial word, final word & the difference between them
    */
    printf("\n%s %s (%d)\n", t, r, diff[0]);

    free(r);
    free(diff);
	return 0;
}

/*
 * Function:  find_max 
 * --------------------
 * Finds the letter with maximum frequency among the other characters of the string
 *
 *  s: pointer of the char array (constant)
 *  cnt: int array, which has the characters' counter role
 *  n: number of characters of the word
 *
 */

__device__ int find_max(const char *s, int *cnt, int n){
    int i, max=0;
    for(i = 0; i < n; ++i)
        if (++cnt[(int)s[i]] > max) max = cnt[(int)s[i]];
    return max;
}

/*
 * Function:  update_buf 
 * --------------------
 * Updates buf array (char), according to counter array (cnt). Buf will be used in deterministic function
 *
 *  cnt: int array, which has the characters' counter role
 *  buf: char array, the one we are updating
 *
 */

__device__ void update_buf(int *cnt, char *buf){
    int i, j=0;
    for(i = 0; i < 128; ++i)
        while (cnt[i]--) buf[j++] = i;
}

/*
 * Function:  best_shuffle 
 * --------------------
 * Shuffles given string (char array) with the use of a deterministic function
 *
 *  s: pointer of the char array (constant)
 *  r: pointer of a copy of char array (will contain final string)
 *  diff: pointer of int array, which will contain the difference between initial & final string
 *  n: number of characters of the word
 *
 */

__global__ void best_shuffle(const char *s, char *r, int *diff, int n){
    
    int idx = threadIdx.x + blockDim.x * blockIdx.x;

    if (idx < n){
        int i, max, cnt[128] = {0};
        char buf[256] = {0};
        
        max = find_max(s, cnt, n);
        update_buf(cnt, buf);
        
        for(i = 0; i < n; ++i){
            if (r[idx] == buf[i]) {
                r[idx] = buf[(i + max) % n] & ~128;
                buf[i] |= 128;
                break;
            }
        }

        atomicAdd(&(diff[0]), diff[0]+(r[idx] == s[idx]));

    }
}

/*
 * Function:  get_input_word 
 * --------------------
 * Returns the input word the user entered (to be shuffled). If no word inserted, throws an error.
 *
 *  argc: number of arguments
 *  argv: the actual arguments
 *
 */

char * get_input_word(int argc, char *argv[]){
    if (argc != 2){
        printf("Usage: %s \"<input_word>\"", argv[0]);
        exit(1);
    }
    return argv[1];
}
	.file	"tmpxft_002402aa_00000000-6_bs_parallel.cudafe1.cpp"
	.text
#APP

#NO_APP
	.type	_ZL26__cudaUnregisterBinaryUtilv, @function
_ZL26__cudaUnregisterBinaryUtilv:
.LFB2033:
	.cfi_startproc
	endbr64
	movq	_ZL20__cudaFatCubinHandle(%rip), %rdi
	jmp	__cudaUnregisterFatBinary@PLT
	.cfi_endproc
.LFE2033:
	.size	_ZL26__cudaUnregisterBinaryUtilv, .-_ZL26__cudaUnregisterBinaryUtilv
	.globl	_Z8find_maxPKcPii
	.type	_Z8find_maxPKcPii, @function
_Z8find_maxPKcPii:
.LFB2028:
	.cfi_startproc
	endbr64
	pushq	%rax
	.cfi_def_cfa_offset 16
	popq	%rax
	.cfi_def_cfa_offset 8
	subq	$24, %rsp
	.cfi_def_cfa_offset 32
	movl	$1, 12(%rsp)
	movl	12(%rsp), %edi
	call	exit@PLT
	.cfi_endproc
.LFE2028:
	.size	_Z8find_maxPKcPii, .-_Z8find_maxPKcPii
	.globl	_Z10update_bufPiPc
	.type	_Z10update_bufPiPc, @function
_Z10update_bufPiPc:
.LFB2029:
	.cfi_startproc
	endbr64
	pushq	%rax
	.cfi_def_cfa_offset 16
	popq	%rax
	.cfi_def_cfa_offset 8
	subq	$24, %rsp
	.cfi_def_cfa_offset 32
	movl	$1, 12(%rsp)
	movl	12(%rsp), %edi
	call	exit@PLT
	.cfi_endproc
.LFE2029:
	.size	_Z10update_bufPiPc, .-_Z10update_bufPiPc
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"Usage: %s \"<input_word>\""
	.text
	.globl	_Z14get_input_wordiPPc
	.type	_Z14get_input_wordiPPc, @function
_Z14get_input_wordiPPc:
.LFB2030:
	.cfi_startproc
	endbr64
	cmpl	$2, %edi
	je	.L7
	pushq	%rax
	.cfi_def_cfa_offset 16
	movq	(%rsi), %rdx
	movl	$2, %edi
	leaq	.LC0(%rip), %rsi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	movl	$1, %edi
	call	exit@PLT
.L7:
	.cfi_def_cfa_offset 8
	movq	8(%rsi), %rax
	ret
	.cfi_endproc
.LFE2030:
	.size	_Z14get_input_wordiPPc, .-_Z14get_input_wordiPPc
	.globl	_Z38__device_stub__Z12best_shufflePKcPcPiiPKcPcPii
	.type	_Z38__device_stub__Z12best_shufflePKcPcPiiPKcPcPii, @function
_Z38__device_stub__Z12best_shufflePKcPcPiiPKcPcPii:
.LFB2055:
	.cfi_startproc
	endbr64
	subq	$152, %rsp
	.cfi_def_cfa_offset 160
	movq	%rdi, 24(%rsp)
	leaq	56(%rsp), %rdi
	movq	%rsi, 16(%rsp)
	leaq	68(%rsp), %rsi
	movq	%rdx, 8(%rsp)
	leaq	40(%rsp), %rdx
	movl	%ecx, 4(%rsp)
	leaq	48(%rsp), %rcx
	movq	%fs:40, %rax
	movq	%rax, 136(%rsp)
	xorl	%eax, %eax
	leaq	24(%rsp), %rax
	movl	$1, 64(%rsp)
	movq	%rax, 104(%rsp)
	leaq	16(%rsp), %rax
	movq	%rax, 112(%rsp)
	leaq	8(%rsp), %rax
	movq	%rax, 120(%rsp)
	leaq	4(%rsp), %rax
	movq	%rax, 128(%rsp)
	movabsq	$4294967297, %rax
	movq	%rax, 56(%rsp)
	movq	%rax, 68(%rsp)
	movl	$1, 76(%rsp)
	call	__cudaPopCallConfiguration@PLT
	testl	%eax, %eax
	jne	.L12
	pushq	48(%rsp)
	.cfi_def_cfa_offset 168
	leaq	_Z12best_shufflePKcPcPii(%rip), %rdi
	pushq	48(%rsp)
	.cfi_def_cfa_offset 176
	movq	84(%rsp), %rcx
	movl	92(%rsp), %r8d
	movq	72(%rsp), %rsi
	movl	80(%rsp), %edx
	leaq	120(%rsp), %r9
	call	cudaLaunchKernel@PLT
	popq	%rax
	.cfi_def_cfa_offset 168
	popq	%rdx
	.cfi_def_cfa_offset 160
.L12:
	movq	136(%rsp), %rax
	subq	%fs:40, %rax
	je	.L14
	call	__stack_chk_fail@PLT
.L14:
	addq	$152, %rsp
	.cfi_def_cfa_offset 8
	ret
	.cfi_endproc
.LFE2055:
	.size	_Z38__device_stub__Z12best_shufflePKcPcPiiPKcPcPii, .-_Z38__device_stub__Z12best_shufflePKcPcPiiPKcPcPii
	.globl	_Z12best_shufflePKcPcPii
	.type	_Z12best_shufflePKcPcPii, @function
_Z12best_shufflePKcPcPii:
.LFB2056:
	.cfi_startproc
	endbr64
	jmp	_Z38__device_stub__Z12best_shufflePKcPcPiiPKcPcPii
	.cfi_endproc
.LFE2056:
	.size	_Z12best_shufflePKcPcPii, .-_Z12best_shufflePKcPcPii
	.section	.rodata.str1.1
.LC1:
	.string	"\nword: %s\n"
.LC2:
	.string	"N: %d, blocks: %d, total_threads: %d\n"
.LC3:
	.string	"Total time (ms): %f\n"
.LC4:
	.string	"Kernel time (ms): %f\n"
.LC5:
	.string	"Data transfer time (ms): %f\n"
.LC6:
	.string	"\n%s %s (%d)\n"
	.section	.text.startup,"ax",@progbits
	.globl	main
	.type	main, @function
main:
.LFB2027:
	.cfi_startproc
	endbr64
	pushq	%r14
	.cfi_def_cfa_offset 16
	.cfi_offset 14, -16
	pushq	%r13
	.cfi_def_cfa_offset 24
	.cfi_offset 13, -24
	pushq	%r12
	.cfi_def_cfa_offset 32
	.cfi_offset 12, -32
	pushq	%rbp
	.cfi_def_cfa_offset 40
	.cfi_offset 6, -40
	pushq	%rbx
	.cfi_def_cfa_offset 48
	.cfi_offset 3, -48
	subq	$96, %rsp
	.cfi_def_cfa_offset 144
	movq	%fs:40, %rax
	movq	%rax, 88(%rsp)
	xorl	%eax, %eax
	call	_Z14get_input_wordiPPc
	leaq	.LC1(%rip), %rsi
	movl	$2, %edi
	movq	%rax, %rdx
	movq	%rax, %rbx
	xorl	%eax, %eax
	call	__printf_chk@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	leaq	8(%rsp), %rdi
	movq	%rax, %rbp
	movl	%eax, %r14d
	call	cudaEventCreate@PLT
	leaq	16(%rsp), %rdi
	addl	$255, %ebp
	call	cudaEventCreate@PLT
	leaq	24(%rsp), %rdi
	call	cudaEventCreate@PLT
	leaq	32(%rsp), %rdi
	call	cudaEventCreate@PLT
	movq	%rbx, %rdi
	call	strdup@PLT
	movl	$4, %esi
	movl	$1, %edi
	movq	%rax, %r13
	call	calloc@PLT
	movq	%rbx, %rdi
	movq	%rax, %r12
	call	strlen@PLT
	leaq	48(%rsp), %rdi
	movq	%rax, %rsi
	call	cudaMalloc@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	leaq	40(%rsp), %rdi
	movq	%rax, %rsi
	call	cudaMalloc@PLT
	leaq	56(%rsp), %rdi
	movl	$4, %esi
	call	cudaMalloc@PLT
	movq	8(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	movq	40(%rsp), %rdi
	movl	$1, %ecx
	movq	%rbx, %rsi
	movq	%rax, %rdx
	call	cudaMemcpy@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	movq	48(%rsp), %rdi
	movl	$1, %ecx
	movq	%rbx, %rsi
	movq	%rax, %rdx
	call	cudaMemcpy@PLT
	movq	24(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movl	%ebp, %eax
	movl	$256, %ecx
	xorl	%r9d, %r9d
	cltd
	xorl	%r8d, %r8d
	movl	$1, 84(%rsp)
	idivl	%ecx
	movl	$16777217, %edx
	movl	$1, %ecx
	salq	$8, %rdx
	movq	%rdx, 76(%rsp)
	movl	%eax, 64(%rsp)
	movl	%eax, %ebp
	movabsq	$4294967297, %rax
	movq	%rax, 68(%rsp)
	movq	64(%rsp), %rdi
	movl	72(%rsp), %esi
	call	__cudaPushCallConfiguration@PLT
	testl	%eax, %eax
	jne	.L18
	movq	56(%rsp), %rdx
	movq	48(%rsp), %rsi
	movl	%r14d, %ecx
	movq	40(%rsp), %rdi
	call	_Z38__device_stub__Z12best_shufflePKcPcPiiPKcPcPii
.L18:
	movq	32(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movq	32(%rsp), %rdi
	call	cudaEventSynchronize@PLT
	movq	32(%rsp), %rdx
	movq	24(%rsp), %rsi
	leaq	76(%rsp), %rdi
	call	cudaEventElapsedTime@PLT
	movq	%rbx, %rdi
	call	strlen@PLT
	movq	48(%rsp), %rsi
	movl	$2, %ecx
	movq	%r13, %rdi
	movq	%rax, %rdx
	call	cudaMemcpy@PLT
	movq	56(%rsp), %rsi
	movl	$2, %ecx
	movq	%r12, %rdi
	movl	$4, %edx
	call	cudaMemcpy@PLT
	movq	16(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movq	16(%rsp), %rdi
	call	cudaEventSynchronize@PLT
	movq	16(%rsp), %rdx
	movq	8(%rsp), %rsi
	leaq	64(%rsp), %rdi
	call	cudaEventElapsedTime@PLT
	movq	56(%rsp), %rdi
	call	cudaFree@PLT
	movq	48(%rsp), %rdi
	call	cudaFree@PLT
	movq	40(%rsp), %rdi
	call	cudaFree@PLT
	movq	24(%rsp), %rdi
	call	cudaEventDestroy@PLT
	movq	32(%rsp), %rdi
	call	cudaEventDestroy@PLT
	movq	8(%rsp), %rdi
	call	cudaEventDestroy@PLT
	movq	16(%rsp), %rdi
	call	cudaEventDestroy@PLT
	movl	%ebp, %r8d
	movl	%ebp, %ecx
	movl	%r14d, %edx
	sall	$8, %r8d
	leaq	.LC2(%rip), %rsi
	movl	$2, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	leaq	.LC3(%rip), %rsi
	movl	$2, %edi
	movb	$1, %al
	cvtss2sd	64(%rsp), %xmm0
	call	__printf_chk@PLT
	movl	$2, %edi
	movb	$1, %al
	leaq	.LC4(%rip), %rsi
	cvtss2sd	76(%rsp), %xmm0
	call	__printf_chk@PLT
	movss	64(%rsp), %xmm0
	subss	76(%rsp), %xmm0
	movb	$1, %al
	leaq	.LC5(%rip), %rsi
	movl	$2, %edi
	cvtss2sd	%xmm0, %xmm0
	call	__printf_chk@PLT
	movl	(%r12), %r8d
	movq	%r13, %rcx
	movq	%rbx, %rdx
	leaq	.LC6(%rip), %rsi
	movl	$2, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	movq	%r13, %rdi
	call	free@PLT
	movq	%r12, %rdi
	call	free@PLT
	movq	88(%rsp), %rax
	subq	%fs:40, %rax
	je	.L19
	call	__stack_chk_fail@PLT
.L19:
	addq	$96, %rsp
	.cfi_def_cfa_offset 48
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 40
	popq	%rbp
	.cfi_def_cfa_offset 32
	popq	%r12
	.cfi_def_cfa_offset 24
	popq	%r13
	.cfi_def_cfa_offset 16
	popq	%r14
	.cfi_def_cfa_offset 8
	ret
	.cfi_endproc
.LFE2027:
	.size	main, .-main
	.section	.rodata.str1.1
.LC7:
	.string	"_Z12best_shufflePKcPcPii"
	.section	.text.startup
	.type	_ZL24__sti____cudaRegisterAllv, @function
_ZL24__sti____cudaRegisterAllv:
.LFB2058:
	.cfi_startproc
	endbr64
	pushq	%rax
	.cfi_def_cfa_offset 16
	leaq	_ZL15__fatDeviceText(%rip), %rdi
	call	__cudaRegisterFatBinary@PLT
	pushq	$0
	.cfi_def_cfa_offset 24
	xorl	%r9d, %r9d
	orl	$-1, %r8d
	pushq	$0
	.cfi_def_cfa_offset 32
	leaq	.LC7(%rip), %rdx
	movq	%rax, %rdi
	leaq	_Z12best_shufflePKcPcPii(%rip), %rsi
	pushq	$0
	.cfi_def_cfa_offset 40
	movq	%rdx, %rcx
	pushq	$0
	.cfi_def_cfa_offset 48
	movq	%rax, _ZL20__cudaFatCubinHandle(%rip)
	call	__cudaRegisterFunction@PLT
	movq	_ZL20__cudaFatCubinHandle(%rip), %rdi
	addq	$32, %rsp
	.cfi_def_cfa_offset 16
	call	__cudaRegisterFatBinaryEnd@PLT
	leaq	_ZL26__cudaUnregisterBinaryUtilv(%rip), %rdi
	popq	%rdx
	.cfi_def_cfa_offset 8
	jmp	atexit@PLT
	.cfi_endproc
.LFE2058:
	.size	_ZL24__sti____cudaRegisterAllv, .-_ZL24__sti____cudaRegisterAllv
	.section	.init_array,"aw"
	.align 8
	.quad	_ZL24__sti____cudaRegisterAllv
	.section	.nvFatBinSegment,"aw"
	.align 8
	.type	_ZL15__fatDeviceText, @object
	.size	_ZL15__fatDeviceText, 24
_ZL15__fatDeviceText:
	.long	1180844977
	.long	1
	.quad	fatbinData
	.quad	0
	.local	_ZL20__cudaFatCubinHandle
	.comm	_ZL20__cudaFatCubinHandle,8,8
	.ident	"GCC: (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:

#include <stdio.h>
#include <string.h>
#include <hip/hip_runtime.h>

#define THREADS_PER_BLOCK 256

__global__ void best_shuffle(const char *s, char *r, int *diff, int n);
__device__ void update_buf(int *cnt, char *buf);
__device__ int find_max(const char *s, int *cnt, int n);

char * get_input_word(int argc, char *argv[]);

/*
 * Main
 */

int main(int argc, char *argv[]){
        
    char *t = get_input_word(argc, argv);
    printf("\nword: %s\n", t);
    int n = strlen(t);
    int blocks, *diff;
    char *r;

    float total_time, comp_time;
    hipEvent_t total_start, total_stop, comp_start, comp_stop;
    hipEventCreate(&total_start);
  	hipEventCreate(&total_stop);
  	hipEventCreate(&comp_start);
    hipEventCreate(&comp_stop);

    /*
     * Memory allocation on host
     */
    r = strdup(t);
    diff = (int *)calloc(1, sizeof(int));

    /*
     * Memory allocation on device
     */
    char *t_dev, *r_dev;
    int *diff_dev;
    hipMalloc(&r_dev, strlen(t)*sizeof(char));
    hipMalloc(&t_dev, strlen(t)*sizeof(char));
    hipMalloc(&diff_dev, 1*sizeof(int));
      
    hipEventRecord(total_start);
  
    /*
    * Copy array from host memory to device memory
    */
    hipMemcpy(t_dev, t, strlen(t)*sizeof(char), hipMemcpyHostToDevice);
    hipMemcpy(r_dev, t, strlen(t)*sizeof(char), hipMemcpyHostToDevice);
 
    hipEventRecord(comp_start);

    /*
    * Create sufficient blocks
    */
    blocks = (n + THREADS_PER_BLOCK - 1)/THREADS_PER_BLOCK;
 
    /*
    * Kernel call
    */ 
    best_shuffle<<< blocks, THREADS_PER_BLOCK >>>(t_dev, r_dev, diff_dev, n);
  
    hipEventRecord(comp_stop);
    hipEventSynchronize(comp_stop);
    hipEventElapsedTime(&comp_time, comp_start, comp_stop);
  
    /*
    * Copy c from host device memory to host memory
    */
    hipMemcpy(r, r_dev, strlen(t)*sizeof(char), hipMemcpyDeviceToHost);
    hipMemcpy(diff, diff_dev, 1*sizeof(int), hipMemcpyDeviceToHost);
     
    hipEventRecord(total_stop);
    hipEventSynchronize(total_stop);
    hipEventElapsedTime(&total_time, total_start, total_stop);
 
    /*
    * Free memory on device
    */
    hipFree(diff_dev);
    hipFree(r_dev);
    hipFree(t_dev);
    hipEventDestroy(comp_start);
    hipEventDestroy(comp_stop);
    hipEventDestroy(total_start);
    hipEventDestroy(total_stop);
         
    /*
    * GPU timing
    */
    printf("N: %d, blocks: %d, total_threads: %d\n", n, blocks, THREADS_PER_BLOCK*blocks);
    printf("Total time (ms): %f\n", total_time);
    printf("Kernel time (ms): %f\n", comp_time);
    printf("Data transfer time (ms): %f\n", total_time-comp_time);

    /*
    * Initial word, final word & the difference between them
    */
    printf("\n%s %s (%d)\n", t, r, diff[0]);

    free(r);
    free(diff);
	return 0;
}

/*
 * Function:  find_max 
 * --------------------
 * Finds the letter with maximum frequency among the other characters of the string
 *
 *  s: pointer of the char array (constant)
 *  cnt: int array, which has the characters' counter role
 *  n: number of characters of the word
 *
 */

__device__ int find_max(const char *s, int *cnt, int n){
    int i, max=0;
    for(i = 0; i < n; ++i)
        if (++cnt[(int)s[i]] > max) max = cnt[(int)s[i]];
    return max;
}

/*
 * Function:  update_buf 
 * --------------------
 * Updates buf array (char), according to counter array (cnt). Buf will be used in deterministic function
 *
 *  cnt: int array, which has the characters' counter role
 *  buf: char array, the one we are updating
 *
 */

__device__ void update_buf(int *cnt, char *buf){
    int i, j=0;
    for(i = 0; i < 128; ++i)
        while (cnt[i]--) buf[j++] = i;
}

/*
 * Function:  best_shuffle 
 * --------------------
 * Shuffles given string (char array) with the use of a deterministic function
 *
 *  s: pointer of the char array (constant)
 *  r: pointer of a copy of char array (will contain final string)
 *  diff: pointer of int array, which will contain the difference between initial & final string
 *  n: number of characters of the word
 *
 */

__global__ void best_shuffle(const char *s, char *r, int *diff, int n){
    
    int idx = threadIdx.x + blockDim.x * blockIdx.x;

    if (idx < n){
        int i, max, cnt[128] = {0};
        char buf[256] = {0};
        
        max = find_max(s, cnt, n);
        update_buf(cnt, buf);
        
        for(i = 0; i < n; ++i){
            if (r[idx] == buf[i]) {
                r[idx] = buf[(i + max) % n] & ~128;
                buf[i] |= 128;
                break;
            }
        }

        atomicAdd(&(diff[0]), diff[0]+(r[idx] == s[idx]));

    }
}

/*
 * Function:  get_input_word 
 * --------------------
 * Returns the input word the user entered (to be shuffled). If no word inserted, throws an error.
 *
 *  argc: number of arguments
 *  argv: the actual arguments
 *
 */

char * get_input_word(int argc, char *argv[]){
    if (argc != 2){
        printf("Usage: %s \"<input_word>\"", argv[0]);
        exit(1);
    }
    return argv[1];
}
	.text
	.file	"bs_parallel.hip"
	.globl	main                            # -- Begin function main
	.type	main,@function
main:                                   # @main
	.cfi_startproc
# %bb.0:
	pushq	%rbp
	.cfi_def_cfa_offset 16
	pushq	%r15
	.cfi_def_cfa_offset 24
	pushq	%r14
	.cfi_def_cfa_offset 32
	pushq	%r13
	.cfi_def_cfa_offset 40
	pushq	%r12
	.cfi_def_cfa_offset 48
	pushq	%rbx
	.cfi_def_cfa_offset 56
	subq	$88, %rsp
	.cfi_def_cfa_offset 144
	.cfi_offset %rbx, -56
	.cfi_offset %r12, -48
	.cfi_offset %r13, -40
	.cfi_offset %r14, -32
	.cfi_offset %r15, -24
	.cfi_offset %rbp, -16
	callq	_Z14get_input_wordiPPc
	movq	%rax, %rbx
	movl	$.L.str, %edi
	movq	%rax, %rsi
	xorl	%eax, %eax
	callq	printf
	movq	%rbx, %rdi
	callq	strlen
	movq	%rax, %r12
	leaq	56(%rsp), %r14
	movq	%r14, %rdi
	callq	hipEventCreate
	leaq	8(%rsp), %rdi
	callq	hipEventCreate
	leaq	48(%rsp), %r15
	movq	%r15, %rdi
	callq	hipEventCreate
	movq	%rsp, %rdi
	callq	hipEventCreate
	movq	%rbx, %rdi
	callq	strdup
	movq	%rax, 72(%rsp)                  # 8-byte Spill
	movl	$1, %edi
	movl	$4, %esi
	callq	calloc
	movq	%rax, 64(%rsp)                  # 8-byte Spill
	movq	%rbx, %rdi
	callq	strlen
	leaq	24(%rsp), %rbp
	movq	%rbp, %rdi
	movq	%rax, %rsi
	callq	hipMalloc
	movq	%rbx, %rdi
	callq	strlen
	leaq	40(%rsp), %r13
	movq	%r13, %rdi
	movq	%rax, %rsi
	callq	hipMalloc
	leaq	16(%rsp), %rdi
	movl	$4, %esi
	callq	hipMalloc
	movq	(%r14), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	movq	(%r13), %r14
	movq	%rbx, %rdi
	callq	strlen
	movq	%r14, %rdi
	movq	%rbx, %rsi
	movq	%rax, %rdx
	movl	$1, %ecx
	callq	hipMemcpy
	movq	(%rbp), %r14
	movq	%rbx, %rdi
	callq	strlen
	movq	%r14, %rdi
	movq	%rbx, %rsi
	movq	%rax, %rdx
	movl	$1, %ecx
	callq	hipMemcpy
	movq	(%r15), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	leal	255(%r12), %eax
	leal	510(%r12), %r13d
	testl	%eax, %eax
	cmovnsl	%eax, %r13d
	sarl	$8, %r13d
	movq	%r13, %rdi
	btsq	$32, %rdi
	movabsq	$4294967296, %rdx               # imm = 0x100000000
	orq	$256, %rdx                      # imm = 0x100
	movl	$1, %esi
	movl	$1, %ecx
	xorl	%r8d, %r8d
	xorl	%r9d, %r9d
	callq	__hipPushCallConfiguration
	testl	%eax, %eax
	jne	.LBB0_2
# %bb.1:
	movq	40(%rsp), %rdi
	movq	24(%rsp), %rsi
	movq	16(%rsp), %rdx
	movl	%r12d, %ecx
	callq	_Z27__device_stub__best_shufflePKcPcPii
.LBB0_2:
	movq	(%rsp), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	movq	(%rsp), %rdi
	callq	hipEventSynchronize
	movq	48(%rsp), %rsi
	movq	(%rsp), %rdx
	leaq	36(%rsp), %rdi
	callq	hipEventElapsedTime
	movq	24(%rsp), %r14
	movq	%rbx, %rdi
	callq	strlen
	movq	72(%rsp), %r15                  # 8-byte Reload
	movq	%r15, %rdi
	movq	%r14, %rsi
	movq	%rax, %rdx
	movl	$2, %ecx
	callq	hipMemcpy
	movq	16(%rsp), %rsi
	movl	$4, %edx
	movq	64(%rsp), %rbp                  # 8-byte Reload
	movq	%rbp, %rdi
	movl	$2, %ecx
	callq	hipMemcpy
	movq	8(%rsp), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	movq	8(%rsp), %rdi
	callq	hipEventSynchronize
	movq	56(%rsp), %rsi
	movq	8(%rsp), %rdx
	leaq	84(%rsp), %r14
	movq	%r14, %rdi
	callq	hipEventElapsedTime
	movq	16(%rsp), %rdi
	callq	hipFree
	movq	24(%rsp), %rdi
	callq	hipFree
	movq	40(%rsp), %rdi
	callq	hipFree
	movq	48(%rsp), %rdi
	callq	hipEventDestroy
	movq	(%rsp), %rdi
	callq	hipEventDestroy
	movq	56(%rsp), %rdi
	callq	hipEventDestroy
	movq	8(%rsp), %rdi
	callq	hipEventDestroy
	movl	%r13d, %ecx
	shll	$8, %ecx
	movl	$.L.str.1, %edi
	movl	%r12d, %esi
	movl	%r13d, %edx
	xorl	%eax, %eax
	callq	printf
	cvtss2sd	(%r14), %xmm0
	movl	$.L.str.2, %edi
	movb	$1, %al
	callq	printf
	leaq	36(%rsp), %r12
	xorps	%xmm0, %xmm0
	cvtss2sd	(%r12), %xmm0
	movl	$.L.str.3, %edi
	movb	$1, %al
	callq	printf
	movss	(%r14), %xmm0                   # xmm0 = mem[0],zero,zero,zero
	subss	(%r12), %xmm0
	cvtss2sd	%xmm0, %xmm0
	movl	$.L.str.4, %edi
	movb	$1, %al
	callq	printf
	movl	(%rbp), %ecx
	movl	$.L.str.5, %edi
	movq	%rbx, %rsi
	movq	%r15, %rdx
	xorl	%eax, %eax
	callq	printf
	movq	%r15, %rdi
	callq	free
	movq	%rbp, %rdi
	callq	free
	xorl	%eax, %eax
	addq	$88, %rsp
	.cfi_def_cfa_offset 56
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%r12
	.cfi_def_cfa_offset 40
	popq	%r13
	.cfi_def_cfa_offset 32
	popq	%r14
	.cfi_def_cfa_offset 24
	popq	%r15
	.cfi_def_cfa_offset 16
	popq	%rbp
	.cfi_def_cfa_offset 8
	retq
.Lfunc_end0:
	.size	main, .Lfunc_end0-main
	.cfi_endproc
                                        # -- End function
	.globl	_Z14get_input_wordiPPc          # -- Begin function _Z14get_input_wordiPPc
	.type	_Z14get_input_wordiPPc,@function
_Z14get_input_wordiPPc:                 # @_Z14get_input_wordiPPc
	.cfi_startproc
# %bb.0:
	cmpl	$2, %edi
	jne	.LBB1_2
# %bb.1:
	movq	8(%rsi), %rax
	retq
.LBB1_2:
	pushq	%rax
	.cfi_def_cfa_offset 16
	movq	(%rsi), %rsi
	movl	$.L.str.6, %edi
	xorl	%eax, %eax
	callq	printf
	movl	$1, %edi
	callq	exit
.Lfunc_end1:
	.size	_Z14get_input_wordiPPc, .Lfunc_end1-_Z14get_input_wordiPPc
	.cfi_endproc
                                        # -- End function
	.globl	_Z27__device_stub__best_shufflePKcPcPii # -- Begin function _Z27__device_stub__best_shufflePKcPcPii
	.type	_Z27__device_stub__best_shufflePKcPcPii,@function
_Z27__device_stub__best_shufflePKcPcPii: # @_Z27__device_stub__best_shufflePKcPcPii
	.cfi_startproc
# %bb.0:
	pushq	%r15
	.cfi_def_cfa_offset 16
	pushq	%r14
	.cfi_def_cfa_offset 24
	pushq	%r13
	.cfi_def_cfa_offset 32
	pushq	%r12
	.cfi_def_cfa_offset 40
	pushq	%rbx
	.cfi_def_cfa_offset 48
	subq	$112, %rsp
	.cfi_def_cfa_offset 160
	.cfi_offset %rbx, -48
	.cfi_offset %r12, -40
	.cfi_offset %r13, -32
	.cfi_offset %r14, -24
	.cfi_offset %r15, -16
	leaq	40(%rsp), %rax
	movq	%rdi, (%rax)
	leaq	32(%rsp), %rdi
	movq	%rsi, (%rdi)
	leaq	24(%rsp), %rsi
	movq	%rdx, (%rsi)
	leaq	4(%rsp), %rdx
	movl	%ecx, (%rdx)
	leaq	80(%rsp), %rbx
	movq	%rax, (%rbx)
	movq	%rdi, 8(%rbx)
	movq	%rsi, 16(%rbx)
	movq	%rdx, 24(%rbx)
	leaq	64(%rsp), %r14
	leaq	48(%rsp), %r15
	leaq	16(%rsp), %r12
	leaq	8(%rsp), %r13
	movq	%r14, %rdi
	movq	%r15, %rsi
	movq	%r12, %rdx
	movq	%r13, %rcx
	callq	__hipPopCallConfiguration
	movq	(%r14), %rsi
	movl	8(%r14), %edx
	movq	(%r15), %rcx
	movl	8(%r15), %r8d
	movl	$_Z12best_shufflePKcPcPii, %edi
	movq	%rbx, %r9
	pushq	(%r13)
	.cfi_adjust_cfa_offset 8
	pushq	(%r12)
	.cfi_adjust_cfa_offset 8
	callq	hipLaunchKernel
	addq	$128, %rsp
	.cfi_adjust_cfa_offset -128
	popq	%rbx
	.cfi_def_cfa_offset 40
	popq	%r12
	.cfi_def_cfa_offset 32
	popq	%r13
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	retq
.Lfunc_end2:
	.size	_Z27__device_stub__best_shufflePKcPcPii, .Lfunc_end2-_Z27__device_stub__best_shufflePKcPcPii
	.cfi_endproc
                                        # -- End function
	.p2align	4, 0x90                         # -- Begin function __hip_module_ctor
	.type	__hip_module_ctor,@function
__hip_module_ctor:                      # @__hip_module_ctor
	.cfi_startproc
# %bb.0:
	subq	$40, %rsp
	.cfi_def_cfa_offset 48
	movq	__hip_gpubin_handle(%rip), %rdi
	testq	%rdi, %rdi
	jne	.LBB3_2
# %bb.1:
	movl	$__hip_fatbin_wrapper, %edi
	callq	__hipRegisterFatBinary
	movq	%rax, %rdi
	movq	%rax, __hip_gpubin_handle(%rip)
.LBB3_2:
	xorps	%xmm0, %xmm0
	movups	%xmm0, 16(%rsp)
	movups	%xmm0, (%rsp)
	movl	$_Z12best_shufflePKcPcPii, %esi
	movl	$.L__unnamed_1, %edx
	movl	$.L__unnamed_1, %ecx
	movl	$-1, %r8d
	xorl	%r9d, %r9d
	callq	__hipRegisterFunction
	movl	$__hip_module_dtor, %edi
	addq	$40, %rsp
	.cfi_def_cfa_offset 8
	jmp	atexit                          # TAILCALL
.Lfunc_end3:
	.size	__hip_module_ctor, .Lfunc_end3-__hip_module_ctor
	.cfi_endproc
                                        # -- End function
	.p2align	4, 0x90                         # -- Begin function __hip_module_dtor
	.type	__hip_module_dtor,@function
__hip_module_dtor:                      # @__hip_module_dtor
	.cfi_startproc
# %bb.0:
	movq	__hip_gpubin_handle(%rip), %rdi
	testq	%rdi, %rdi
	je	.LBB4_2
# %bb.1:
	pushq	%rax
	.cfi_def_cfa_offset 16
	callq	__hipUnregisterFatBinary
	movq	$0, __hip_gpubin_handle(%rip)
	addq	$8, %rsp
	.cfi_def_cfa_offset 8
.LBB4_2:
	retq
.Lfunc_end4:
	.size	__hip_module_dtor, .Lfunc_end4-__hip_module_dtor
	.cfi_endproc
                                        # -- End function
	.type	.L.str,@object                  # @.str
	.section	.rodata.str1.1,"aMS",@progbits,1
.L.str:
	.asciz	"\nword: %s\n"
	.size	.L.str, 11

	.type	_Z12best_shufflePKcPcPii,@object # @_Z12best_shufflePKcPcPii
	.section	.rodata,"a",@progbits
	.globl	_Z12best_shufflePKcPcPii
	.p2align	3, 0x0
_Z12best_shufflePKcPcPii:
	.quad	_Z27__device_stub__best_shufflePKcPcPii
	.size	_Z12best_shufflePKcPcPii, 8

	.type	.L.str.1,@object                # @.str.1
	.section	.rodata.str1.1,"aMS",@progbits,1
.L.str.1:
	.asciz	"N: %d, blocks: %d, total_threads: %d\n"
	.size	.L.str.1, 38

	.type	.L.str.2,@object                # @.str.2
.L.str.2:
	.asciz	"Total time (ms): %f\n"
	.size	.L.str.2, 21

	.type	.L.str.3,@object                # @.str.3
.L.str.3:
	.asciz	"Kernel time (ms): %f\n"
	.size	.L.str.3, 22

	.type	.L.str.4,@object                # @.str.4
.L.str.4:
	.asciz	"Data transfer time (ms): %f\n"
	.size	.L.str.4, 29

	.type	.L.str.5,@object                # @.str.5
.L.str.5:
	.asciz	"\n%s %s (%d)\n"
	.size	.L.str.5, 13

	.type	.L.str.6,@object                # @.str.6
.L.str.6:
	.asciz	"Usage: %s \"<input_word>\""
	.size	.L.str.6, 25

	.type	.L__unnamed_1,@object           # @0
.L__unnamed_1:
	.asciz	"_Z12best_shufflePKcPcPii"
	.size	.L__unnamed_1, 25

	.type	__hip_fatbin_wrapper,@object    # @__hip_fatbin_wrapper
	.section	.hipFatBinSegment,"a",@progbits
	.p2align	3, 0x0
__hip_fatbin_wrapper:
	.long	1212764230                      # 0x48495046
	.long	1                               # 0x1
	.quad	__hip_fatbin
	.quad	0
	.size	__hip_fatbin_wrapper, 24

	.type	__hip_gpubin_handle,@object     # @__hip_gpubin_handle
	.local	__hip_gpubin_handle
	.comm	__hip_gpubin_handle,8,8
	.section	.init_array,"aw",@init_array
	.p2align	3, 0x0
	.quad	__hip_module_ctor
	.type	__hip_cuid_,@object             # @__hip_cuid_
	.bss
	.globl	__hip_cuid_
__hip_cuid_:
	.byte	0                               # 0x0
	.size	__hip_cuid_, 1

	.ident	"AMD clang version 18.0.0git (https://github.com/RadeonOpenCompute/llvm-project roc-6.3.2 25012 e5bf7e55c91490b07c49d8960fa7983d864936c4)"
	.section	".note.GNU-stack","",@progbits
	.addrsig
	.addrsig_sym _Z27__device_stub__best_shufflePKcPcPii
	.addrsig_sym __hip_module_ctor
	.addrsig_sym __hip_module_dtor
	.addrsig_sym _Z12best_shufflePKcPcPii
	.addrsig_sym __hip_fatbin
	.addrsig_sym __hip_fatbin_wrapper
	.addrsig_sym __hip_cuid_

	.text
	.amdgcn_target "amdgcn-amd-amdhsa--gfx1100"
	.protected	_Z12best_shufflePKcPcPii ; -- Begin function _Z12best_shufflePKcPcPii
	.globl	_Z12best_shufflePKcPcPii
	.p2align	8
	.type	_Z12best_shufflePKcPcPii,@function
_Z12best_shufflePKcPcPii:               ; @_Z12best_shufflePKcPcPii
; %bb.0:
	s_clause 0x1
	s_load_b32 s2, s[0:1], 0x2c
	s_load_b32 s8, s[0:1], 0x18
	s_waitcnt lgkmcnt(0)
	s_and_b32 s2, s2, 0xffff
	s_delay_alu instid0(SALU_CYCLE_1) | instskip(SKIP_1) | instid1(VALU_DEP_1)
	v_mad_u64_u32 v[1:2], null, s15, s2, v[0:1]
	s_mov_b32 s2, exec_lo
	v_cmpx_gt_i32_e64 s8, v1
	s_cbranch_execz .LBB0_22
; %bb.1:
	s_clause 0x1
	s_load_b128 s[4:7], s[0:1], 0x0
	s_load_b64 s[0:1], s[0:1], 0x10
	s_mov_b32 s12, 0
	v_mov_b32_e32 v0, 0
	s_mov_b32 s13, s12
	s_mov_b32 s14, s12
	s_mov_b32 s15, s12
	v_dual_mov_b32 v2, s12 :: v_dual_mov_b32 v3, s13
	v_dual_mov_b32 v4, s14 :: v_dual_mov_b32 v5, s15
	s_cmp_gt_i32 s8, 0
	s_clause 0x1f
	scratch_store_b128 off, v[2:5], off offset:512
	scratch_store_b128 off, v[2:5], off offset:496
	scratch_store_b128 off, v[2:5], off offset:480
	scratch_store_b128 off, v[2:5], off offset:464
	scratch_store_b128 off, v[2:5], off offset:448
	scratch_store_b128 off, v[2:5], off offset:432
	scratch_store_b128 off, v[2:5], off offset:416
	scratch_store_b128 off, v[2:5], off offset:400
	scratch_store_b128 off, v[2:5], off offset:384
	scratch_store_b128 off, v[2:5], off offset:368
	scratch_store_b128 off, v[2:5], off offset:352
	scratch_store_b128 off, v[2:5], off offset:336
	scratch_store_b128 off, v[2:5], off offset:320
	scratch_store_b128 off, v[2:5], off offset:304
	scratch_store_b128 off, v[2:5], off offset:288
	scratch_store_b128 off, v[2:5], off offset:272
	scratch_store_b128 off, v[2:5], off offset:256
	scratch_store_b128 off, v[2:5], off offset:240
	scratch_store_b128 off, v[2:5], off offset:224
	scratch_store_b128 off, v[2:5], off offset:208
	scratch_store_b128 off, v[2:5], off offset:192
	scratch_store_b128 off, v[2:5], off offset:176
	scratch_store_b128 off, v[2:5], off offset:160
	scratch_store_b128 off, v[2:5], off offset:144
	scratch_store_b128 off, v[2:5], off offset:128
	scratch_store_b128 off, v[2:5], off offset:112
	scratch_store_b128 off, v[2:5], off offset:96
	scratch_store_b128 off, v[2:5], off offset:80
	scratch_store_b128 off, v[2:5], off offset:64
	scratch_store_b128 off, v[2:5], off offset:48
	scratch_store_b128 off, v[2:5], off offset:32
	scratch_store_b128 off, v[2:5], off offset:16
	s_clause 0xd
	scratch_store_b128 off, v[2:5], off offset:768
	scratch_store_b128 off, v[2:5], off offset:752
	scratch_store_b128 off, v[2:5], off offset:736
	scratch_store_b128 off, v[2:5], off offset:720
	scratch_store_b128 off, v[2:5], off offset:704
	scratch_store_b128 off, v[2:5], off offset:688
	scratch_store_b128 off, v[2:5], off offset:672
	scratch_store_b128 off, v[2:5], off offset:656
	scratch_store_b128 off, v[2:5], off offset:640
	scratch_store_b128 off, v[2:5], off offset:624
	scratch_store_b128 off, v[2:5], off offset:608
	scratch_store_b128 off, v[2:5], off offset:592
	scratch_store_b128 off, v[2:5], off offset:576
	scratch_store_b128 off, v[2:5], off offset:560
	s_cselect_b32 s9, -1, 0
	s_cmp_lt_i32 s8, 1
	s_clause 0x1
	scratch_store_b128 off, v[2:5], off offset:544
	scratch_store_b128 off, v[2:5], off offset:528
	s_cbranch_scc1 .LBB0_4
; %bb.2:                                ; %.lr.ph.i.preheader
	v_mov_b32_e32 v2, 0
	v_mov_b32_e32 v0, 0
	s_waitcnt lgkmcnt(0)
	s_mov_b32 s2, s4
	s_mov_b32 s3, s5
	s_mov_b32 s10, s8
.LBB0_3:                                ; %.lr.ph.i
                                        ; =>This Inner Loop Header: Depth=1
	global_load_i8 v3, v2, s[2:3]
	s_add_i32 s10, s10, -1
	s_add_u32 s2, s2, 1
	s_addc_u32 s3, s3, 0
	s_cmp_lg_u32 s10, 0
	s_waitcnt vmcnt(0)
	v_lshlrev_b32_e32 v3, 2, v3
	s_delay_alu instid0(VALU_DEP_1)
	v_add_nc_u32_e32 v3, 16, v3
	scratch_load_b32 v4, v3, off
	s_waitcnt vmcnt(0)
	v_add_nc_u32_e32 v5, 1, v4
	v_cmp_lt_i32_e32 vcc_lo, v4, v0
	scratch_store_b32 v3, v5, off
	v_cndmask_b32_e32 v0, v5, v0, vcc_lo
	s_cbranch_scc1 .LBB0_3
.LBB0_4:                                ; %_Z8find_maxPKcPii.exit
	v_dual_mov_b32 v3, 0 :: v_dual_mov_b32 v2, -1
	s_mov_b32 s2, 0
.LBB0_5:                                ; %.preheader.i
                                        ; =>This Loop Header: Depth=1
                                        ;     Child Loop BB0_7 Depth 2
	s_delay_alu instid0(SALU_CYCLE_1) | instskip(NEXT) | instid1(SALU_CYCLE_1)
	s_lshl_b32 s10, s2, 2
	s_add_i32 s3, s10, 16
	scratch_load_b32 v4, off, s3
	s_waitcnt vmcnt(0)
	v_add_nc_u32_e32 v5, -1, v4
	scratch_store_b32 off, v5, s3
	s_mov_b32 s3, exec_lo
	v_cmpx_ne_u32_e32 0, v4
	s_cbranch_execz .LBB0_9
; %bb.6:                                ; %.lr.ph.i26
                                        ;   in Loop: Header=BB0_5 Depth=1
	v_add_nc_u32_e64 v5, s10, 16
	v_mov_b32_e32 v6, s2
	s_mov_b32 s10, 0
.LBB0_7:                                ;   Parent Loop BB0_5 Depth=1
                                        ; =>  This Inner Loop Header: Depth=2
	v_add_nc_u32_e32 v4, -1, v4
	v_add_nc_u32_e32 v7, 0x210, v3
	v_add_nc_u32_e32 v3, 1, v3
	s_delay_alu instid0(VALU_DEP_3) | instskip(SKIP_2) | instid1(SALU_CYCLE_1)
	v_cmp_eq_u32_e32 vcc_lo, 0, v4
	scratch_store_b8 v7, v6, off
	s_or_b32 s10, vcc_lo, s10
	s_and_not1_b32 exec_lo, exec_lo, s10
	s_cbranch_execnz .LBB0_7
; %bb.8:                                ; %._crit_edge.i.loopexit
                                        ;   in Loop: Header=BB0_5 Depth=1
	s_or_b32 exec_lo, exec_lo, s10
	scratch_store_b32 v5, v2, off
.LBB0_9:                                ; %Flow75
                                        ;   in Loop: Header=BB0_5 Depth=1
	s_or_b32 exec_lo, exec_lo, s3
	s_add_i32 s2, s2, 1
	s_delay_alu instid0(SALU_CYCLE_1)
	s_cmpk_lg_i32 s2, 0x80
	s_cbranch_scc1 .LBB0_5
; %bb.10:                               ; %_Z10update_bufPiPc.exit.preheader
	v_ashrrev_i32_e32 v4, 31, v1
	s_waitcnt lgkmcnt(0)
	v_add_co_u32 v2, vcc_lo, s6, v1
	s_delay_alu instid0(VALU_DEP_2)
	v_add_co_ci_u32_e32 v3, vcc_lo, s7, v4, vcc_lo
	s_and_not1_b32 vcc_lo, exec_lo, s9
	global_load_u8 v5, v[2:3], off
	s_cbranch_vccnz .LBB0_18
; %bb.11:                               ; %.lr.ph.preheader
	s_waitcnt vmcnt(0)
	v_and_b32_e32 v6, 0xff, v5
	s_mov_b32 s2, 0
	s_mov_b32 s9, 0
                                        ; implicit-def: $sgpr3
                                        ; implicit-def: $sgpr7
                                        ; implicit-def: $sgpr6
.LBB0_12:                               ; %.lr.ph
                                        ; =>This Inner Loop Header: Depth=1
	s_delay_alu instid0(SALU_CYCLE_1)
	s_add_i32 s10, s9, 0x210
	s_or_b32 s6, s6, exec_lo
	scratch_load_u8 v7, off, s10
	s_or_b32 s7, s7, exec_lo
	s_mov_b32 s11, exec_lo
                                        ; implicit-def: $sgpr10
	s_waitcnt vmcnt(0)
	v_cmpx_ne_u16_e64 v6, v7
; %bb.13:                               ; %_Z10update_bufPiPc.exit
                                        ;   in Loop: Header=BB0_12 Depth=1
	s_add_i32 s10, s9, 1
	s_delay_alu instid0(SALU_CYCLE_1)
	s_cmp_eq_u32 s8, s10
	s_cselect_b32 s12, -1, 0
	s_and_not1_b32 s7, s7, exec_lo
	s_and_b32 s12, s12, exec_lo
	s_and_not1_b32 s6, s6, exec_lo
	s_or_b32 s7, s7, s12
; %bb.14:                               ; %Flow73
                                        ;   in Loop: Header=BB0_12 Depth=1
	s_or_b32 exec_lo, exec_lo, s11
	s_delay_alu instid0(SALU_CYCLE_1)
	s_and_b32 s11, exec_lo, s7
	v_add_nc_u32_e64 v7, 0x210, s9
	s_or_b32 s2, s11, s2
	v_mov_b32_e32 v8, s9
	s_and_not1_b32 s3, s3, exec_lo
	s_and_b32 s9, s6, exec_lo
	s_delay_alu instid0(SALU_CYCLE_1)
	s_or_b32 s3, s3, s9
	s_mov_b32 s9, s10
	s_and_not1_b32 exec_lo, exec_lo, s2
	s_cbranch_execnz .LBB0_12
; %bb.15:                               ; %loop.exit.guard
	s_or_b32 exec_lo, exec_lo, s2
	s_and_saveexec_b32 s2, s3
	s_delay_alu instid0(SALU_CYCLE_1)
	s_xor_b32 s2, exec_lo, s2
	s_cbranch_execz .LBB0_17
; %bb.16:
	s_ashr_i32 s3, s8, 31
	v_add_nc_u32_e32 v0, v8, v0
	s_add_i32 s8, s8, s3
	s_delay_alu instid0(SALU_CYCLE_1) | instskip(NEXT) | instid1(VALU_DEP_1)
	s_xor_b32 s3, s8, s3
	v_ashrrev_i32_e32 v9, 31, v0
	v_cvt_f32_u32_e32 v6, s3
	s_sub_i32 s6, 0, s3
	s_delay_alu instid0(VALU_DEP_2) | instskip(NEXT) | instid1(VALU_DEP_2)
	v_add_nc_u32_e32 v0, v0, v9
	v_rcp_iflag_f32_e32 v6, v6
	s_delay_alu instid0(VALU_DEP_1) | instskip(SKIP_2) | instid1(VALU_DEP_1)
	v_xor_b32_e32 v0, v0, v9
	s_waitcnt_depctr 0xfff
	v_mul_f32_e32 v6, 0x4f7ffffe, v6
	v_cvt_u32_f32_e32 v6, v6
	s_delay_alu instid0(VALU_DEP_1) | instskip(NEXT) | instid1(VALU_DEP_1)
	v_mul_lo_u32 v8, s6, v6
	v_mul_hi_u32 v8, v6, v8
	s_delay_alu instid0(VALU_DEP_1) | instskip(NEXT) | instid1(VALU_DEP_1)
	v_add_nc_u32_e32 v6, v6, v8
	v_mul_hi_u32 v6, v0, v6
	s_delay_alu instid0(VALU_DEP_1) | instskip(NEXT) | instid1(VALU_DEP_1)
	v_mul_lo_u32 v6, v6, s3
	v_sub_nc_u32_e32 v0, v0, v6
	s_delay_alu instid0(VALU_DEP_1) | instskip(SKIP_1) | instid1(VALU_DEP_2)
	v_subrev_nc_u32_e32 v6, s3, v0
	v_cmp_le_u32_e32 vcc_lo, s3, v0
	v_cndmask_b32_e32 v0, v0, v6, vcc_lo
	s_delay_alu instid0(VALU_DEP_1) | instskip(SKIP_1) | instid1(VALU_DEP_2)
	v_subrev_nc_u32_e32 v6, s3, v0
	v_cmp_le_u32_e32 vcc_lo, s3, v0
	v_cndmask_b32_e32 v0, v0, v6, vcc_lo
	v_or_b32_e32 v6, 0x80, v5
	s_delay_alu instid0(VALU_DEP_2) | instskip(NEXT) | instid1(VALU_DEP_1)
	v_xor_b32_e32 v0, v0, v9
	v_sub_nc_u32_e32 v0, v0, v9
	s_delay_alu instid0(VALU_DEP_1)
	v_add_nc_u32_e32 v0, 0x210, v0
	scratch_load_u8 v0, v0, off
	s_waitcnt vmcnt(0)
	v_and_b32_e32 v0, 0x7f, v0
	global_store_b8 v[2:3], v0, off
	scratch_store_b8 v7, v6, off
	v_mov_b32_e32 v5, v0
.LBB0_17:                               ; %Flow
	s_or_b32 exec_lo, exec_lo, s2
.LBB0_18:                               ; %.loopexit
	v_add_co_u32 v0, vcc_lo, s4, v1
	v_add_co_ci_u32_e32 v1, vcc_lo, s5, v4, vcc_lo
	v_mov_b32_e32 v2, 0
	s_mov_b32 s2, exec_lo
	s_mov_b32 s3, 0
	global_load_u8 v0, v[0:1], off
	global_load_b32 v1, v2, s[0:1]
	s_waitcnt vmcnt(2)
	v_and_b32_e32 v2, 0xff, v5
	s_waitcnt vmcnt(1)
	s_delay_alu instid0(VALU_DEP_1)
	v_cmp_eq_u16_e32 vcc_lo, v2, v0
	s_waitcnt vmcnt(0)
	v_add_co_ci_u32_e32 v0, vcc_lo, 0, v1, vcc_lo
.LBB0_19:                               ; %ComputeLoop
                                        ; =>This Inner Loop Header: Depth=1
	s_ctz_i32_b32 s4, s2
	s_delay_alu instid0(VALU_DEP_1) | instid1(SALU_CYCLE_1)
	v_readlane_b32 s5, v0, s4
	s_lshl_b32 s4, 1, s4
	s_delay_alu instid0(SALU_CYCLE_1) | instskip(NEXT) | instid1(VALU_DEP_1)
	s_and_not1_b32 s2, s2, s4
	s_add_i32 s3, s3, s5
	s_cmp_lg_u32 s2, 0
	s_cbranch_scc1 .LBB0_19
; %bb.20:                               ; %ComputeEnd
	v_mbcnt_lo_u32_b32 v0, exec_lo, 0
	s_mov_b32 s2, exec_lo
	s_delay_alu instid0(VALU_DEP_1)
	v_cmpx_eq_u32_e32 0, v0
	s_xor_b32 s2, exec_lo, s2
	s_cbranch_execz .LBB0_22
; %bb.21:
	v_dual_mov_b32 v0, 0 :: v_dual_mov_b32 v1, s3
	global_atomic_add_u32 v0, v1, s[0:1]
.LBB0_22:
	s_endpgm
	.section	.rodata,"a",@progbits
	.p2align	6, 0x0
	.amdhsa_kernel _Z12best_shufflePKcPcPii
		.amdhsa_group_segment_fixed_size 0
		.amdhsa_private_segment_fixed_size 784
		.amdhsa_kernarg_size 288
		.amdhsa_user_sgpr_count 15
		.amdhsa_user_sgpr_dispatch_ptr 0
		.amdhsa_user_sgpr_queue_ptr 0
		.amdhsa_user_sgpr_kernarg_segment_ptr 1
		.amdhsa_user_sgpr_dispatch_id 0
		.amdhsa_user_sgpr_private_segment_size 0
		.amdhsa_wavefront_size32 1
		.amdhsa_uses_dynamic_stack 0
		.amdhsa_enable_private_segment 1
		.amdhsa_system_sgpr_workgroup_id_x 1
		.amdhsa_system_sgpr_workgroup_id_y 0
		.amdhsa_system_sgpr_workgroup_id_z 0
		.amdhsa_system_sgpr_workgroup_info 0
		.amdhsa_system_vgpr_workitem_id 0
		.amdhsa_next_free_vgpr 10
		.amdhsa_next_free_sgpr 16
		.amdhsa_float_round_mode_32 0
		.amdhsa_float_round_mode_16_64 0
		.amdhsa_float_denorm_mode_32 3
		.amdhsa_float_denorm_mode_16_64 3
		.amdhsa_dx10_clamp 1
		.amdhsa_ieee_mode 1
		.amdhsa_fp16_overflow 0
		.amdhsa_workgroup_processor_mode 1
		.amdhsa_memory_ordered 1
		.amdhsa_forward_progress 0
		.amdhsa_shared_vgpr_count 0
		.amdhsa_exception_fp_ieee_invalid_op 0
		.amdhsa_exception_fp_denorm_src 0
		.amdhsa_exception_fp_ieee_div_zero 0
		.amdhsa_exception_fp_ieee_overflow 0
		.amdhsa_exception_fp_ieee_underflow 0
		.amdhsa_exception_fp_ieee_inexact 0
		.amdhsa_exception_int_div_zero 0
	.end_amdhsa_kernel
	.text
.Lfunc_end0:
	.size	_Z12best_shufflePKcPcPii, .Lfunc_end0-_Z12best_shufflePKcPcPii
                                        ; -- End function
	.section	.AMDGPU.csdata,"",@progbits
; Kernel info:
; codeLenInByte = 1384
; NumSgprs: 18
; NumVgprs: 10
; ScratchSize: 784
; MemoryBound: 0
; FloatMode: 240
; IeeeMode: 1
; LDSByteSize: 0 bytes/workgroup (compile time only)
; SGPRBlocks: 2
; VGPRBlocks: 1
; NumSGPRsForWavesPerEU: 18
; NumVGPRsForWavesPerEU: 10
; Occupancy: 16
; WaveLimiterHint : 0
; COMPUTE_PGM_RSRC2:SCRATCH_EN: 1
; COMPUTE_PGM_RSRC2:USER_SGPR: 15
; COMPUTE_PGM_RSRC2:TRAP_HANDLER: 0
; COMPUTE_PGM_RSRC2:TGID_X_EN: 1
; COMPUTE_PGM_RSRC2:TGID_Y_EN: 0
; COMPUTE_PGM_RSRC2:TGID_Z_EN: 0
; COMPUTE_PGM_RSRC2:TIDIG_COMP_CNT: 0
	.text
	.p2alignl 7, 3214868480
	.fill 96, 4, 3214868480
	.type	__hip_cuid_,@object             ; @__hip_cuid_
	.section	.bss,"aw",@nobits
	.globl	__hip_cuid_
__hip_cuid_:
	.byte	0                               ; 0x0
	.size	__hip_cuid_, 1

	.ident	"AMD clang version 18.0.0git (https://github.com/RadeonOpenCompute/llvm-project roc-6.3.2 25012 e5bf7e55c91490b07c49d8960fa7983d864936c4)"
	.section	".note.GNU-stack","",@progbits
	.addrsig
	.addrsig_sym __hip_cuid_
	.amdgpu_metadata
---
amdhsa.kernels:
  - .args:
      - .address_space:  global
        .offset:         0
        .size:           8
        .value_kind:     global_buffer
      - .address_space:  global
        .offset:         8
        .size:           8
        .value_kind:     global_buffer
      - .address_space:  global
        .offset:         16
        .size:           8
        .value_kind:     global_buffer
      - .offset:         24
        .size:           4
        .value_kind:     by_value
      - .offset:         32
        .size:           4
        .value_kind:     hidden_block_count_x
      - .offset:         36
        .size:           4
        .value_kind:     hidden_block_count_y
      - .offset:         40
        .size:           4
        .value_kind:     hidden_block_count_z
      - .offset:         44
        .size:           2
        .value_kind:     hidden_group_size_x
      - .offset:         46
        .size:           2
        .value_kind:     hidden_group_size_y
      - .offset:         48
        .size:           2
        .value_kind:     hidden_group_size_z
      - .offset:         50
        .size:           2
        .value_kind:     hidden_remainder_x
      - .offset:         52
        .size:           2
        .value_kind:     hidden_remainder_y
      - .offset:         54
        .size:           2
        .value_kind:     hidden_remainder_z
      - .offset:         72
        .size:           8
        .value_kind:     hidden_global_offset_x
      - .offset:         80
        .size:           8
        .value_kind:     hidden_global_offset_y
      - .offset:         88
        .size:           8
        .value_kind:     hidden_global_offset_z
      - .offset:         96
        .size:           2
        .value_kind:     hidden_grid_dims
    .group_segment_fixed_size: 0
    .kernarg_segment_align: 8
    .kernarg_segment_size: 288
    .language:       OpenCL C
    .language_version:
      - 2
      - 0
    .max_flat_workgroup_size: 1024
    .name:           _Z12best_shufflePKcPcPii
    .private_segment_fixed_size: 784
    .sgpr_count:     18
    .sgpr_spill_count: 0
    .symbol:         _Z12best_shufflePKcPcPii.kd
    .uniform_work_group_size: 1
    .uses_dynamic_stack: false
    .vgpr_count:     10
    .vgpr_spill_count: 0
    .wavefront_size: 32
    .workgroup_processor_mode: 1
amdhsa.target:   amdgcn-amd-amdhsa--gfx1100
amdhsa.version:
  - 1
  - 2
...

	.end_amdgpu_metadata
