#include <stdio.h>
#include <stdlib.h>

// Variables
float* h_A;   // host vectors
float* h_C;
float* d_A;   // device vectors
float* d_C;

// Functions
void RandomInit(float*, int);
__global__ void FindMax(const float*, float*, int);

// Host Code
int main(){
	// Settings
	// gid		-> GPU device id (0, 1, ...)
	// err		-> error message get from CUDA calls
	// N 		-> Length of an array
	// size 	-> memory size of the allocate array
	// sb 		-> memory size after handle by GPU
	// sm 		-> size of shared memory in each individual block
	// m  		-> the power of threadsPerBlock
	// threadsPerBlock, blocksPerGrid -> For launching kernel
	// 
	// start, stop		-> CUDA event timer
	// Intime			-> Calculate the input time, allocate and move data in device memory
	// gputime			-> Time spent in GPU only
	// Outime			-> Time used to handle the rest of finding maximum
	// gputime_tot		-> Time total spent
	// 
	// max_value		-> Maximum value inside this array, find by GPU
	int gid;
	cudaError_t err;
	int N;
	int size, sb;
	int sm;
	int threadsPerBlock, blocksPerGrid;
	cudaEvent_t start, stop;
	float Intime, gputime, Outime, gputime_tot, cputime;
    float max_value;
    float max_value_CPU;
    FILE *output;

    // Optimize block size and grid size , with array length N.
    N = 81920007;
    size = N * sizeof(float);

	// Select GPU device
    printf("Select the GPU with device ID: "); 
    scanf("%d", &gid);
    err = cudaSetDevice(gid);
    if (err != cudaSuccess) {
		printf("!!! Cannot select GPU with device ID = %d\n", gid);
	  	exit(1);
    }
    printf("Set GPU with device ID = %d\n", gid);

    // Create the timer
    cudaEventCreate(&start);
    cudaEventCreate(&stop);

    output = fopen("optimize_result.txt", "a");
    fprintf(output, "BlockSize GridSize GPUonly TotalGPU TotalCPU SpeedUp Check\n");
    fclose(output);

    // m -> the power of the block size
    // g -> the power of the grid size
    for(int m = 1; m <= 10; m = m+1){
        for(int g = 1; g <= 4; g = g+1){

            Intime = 0.0;
            gputime = 0.0;
            Outime = 0.0;
            gputime_tot = 0.0;
            cputime = 0.0;
            max_value = -2.0;
            max_value_CPU = -2.0;

            threadsPerBlock = pow(2, m);
            blocksPerGrid = pow(10, g);
            printf("%4d    %7d\n", threadsPerBlock, blocksPerGrid);

            // Allocate input array
            sb = blocksPerGrid * sizeof(float);
            h_A = (float*)malloc(size);
            h_C = (float*)malloc(sb);
            
            // Initialize input vectors
            RandomInit(h_A, N);

            // Start the timer: Record allocate memory and move data, from host to device
            cudaEventRecord(start, 0);

            // Allocate the array in device memory
            cudaMalloc((void**)&d_A, size);
            cudaMalloc((void**)&d_C, sb);

            // Copy array from host to device memory
            cudaMemcpy(d_A, h_A, size, cudaMemcpyHostToDevice);

            // Stop the timer: Record allocate memory and move data, from host to device
            cudaEventRecord(stop, 0);
            cudaEventSynchronize(stop);

            // Calculate spend time: Record allocate memory and move data, from host to device
            cudaEventElapsedTime(&Intime, start, stop);

            // start the timer
            cudaEventRecord(start, 0);

            // Called the kernel
            sm = threadsPerBlock * sizeof(float);
            FindMax <<< blocksPerGrid, threadsPerBlock, sm >>>(d_A, d_C, N);
            
            // stop the timer
            cudaEventRecord(stop, 0);
            cudaEventSynchronize(stop);
            
            // Calculate spend time: Matrix Addition calculation time
            cudaEventElapsedTime(&gputime, start, stop);

            // start the timer
            cudaEventRecord(start,0);
            
            // Copy result from device memory to host memory
            // h_C contains the result of each block in host memory
            cudaMemcpy(h_C, d_C, sb, cudaMemcpyDeviceToHost);

            cudaFree(d_A);
            cudaFree(d_C);

            for(int i = 0; i < blocksPerGrid; i = i+1){
                if(h_C[i] > max_value){
                    max_value = h_C[i];
                }
            }

            // stop the timer
            cudaEventRecord(stop, 0);
            cudaEventSynchronize(stop);

            cudaEventElapsedTime( &Outime, start, stop);
            gputime_tot = Intime + gputime + Outime;

            // start the timer
            cudaEventRecord(start, 0);

            // Compute the reference solution
            for(int i = 0; i < N; i = i+1){
                if(h_A[i] > max_value_CPU){
                    max_value_CPU = h_A[i];
                }
            }
            
            // stop the timer
            cudaEventRecord(stop, 0);
            cudaEventSynchronize(stop);

            cudaEventElapsedTime(&cputime, start, stop);

            free(h_A);
            free(h_C);

            // Write to file
            output = fopen("optimize_result.txt", "a");
            fprintf(output, "%d %d %f %f %f %f ", threadsPerBlock, blocksPerGrid, gputime, gputime_tot, cputime, cputime/gputime_tot);
            fprintf(output, "%.23f\n", max_value - max_value_CPU);
            fclose(output);
            

        }
    }


    // Destroy the timer
    cudaEventDestroy(start);
    cudaEventDestroy(stop);

    // Reset the device
    cudaDeviceReset();

    return 0;
}

__global__ void FindMax(const float* A, float* C, int N){
    extern __shared__ float cache[];

    int i = blockDim.x * blockIdx.x + threadIdx.x;
    int cacheIndex = threadIdx.x;

    float max = -2.0;

    while (i < N) {
        if(A[i] > max){
        	max = A[i];
        }
        i = i + blockDim.x * gridDim.x;  
    }
   
    cache[cacheIndex] = max;

    __syncthreads();

    // Perform parallel reduction, threadsPerBlock must be 2^m
    int ib = blockDim.x/2;
    while (ib != 0) {
    	if(cacheIndex < ib){
    		if(cache[cacheIndex] < cache[cacheIndex + ib]){
      			cache[cacheIndex] = cache[cacheIndex + ib];
      		}
    	}

      	__syncthreads();

      	ib = ib / 2;
    }
    
    if(cacheIndex == 0){
    	C[blockIdx.x] = cache[0];
    }

}

// Allocates an array with random float entries in (-1,1)
void RandomInit(float* data, int n){
    for (int i = 0; i < n; ++i)
        data[i] = 2.0*rand()/(float)RAND_MAX - 1.0;
}
	.file	"tmpxft_0026705d_00000000-6_findMax_Optimize.cudafe1.cpp"
	.text
#APP

#NO_APP
	.type	_ZL26__cudaUnregisterBinaryUtilv, @function
_ZL26__cudaUnregisterBinaryUtilv:
.LFB2031:
	.cfi_startproc
	endbr64
	movq	_ZL20__cudaFatCubinHandle(%rip), %rdi
	jmp	__cudaUnregisterFatBinary@PLT
	.cfi_endproc
.LFE2031:
	.size	_ZL26__cudaUnregisterBinaryUtilv, .-_ZL26__cudaUnregisterBinaryUtilv
	.globl	_Z10RandomInitPfi
	.type	_Z10RandomInitPfi, @function
_Z10RandomInitPfi:
.LFB2028:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	movq	%rdi, %r12
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	movl	%esi, %ebp
	pushq	%rbx
	.cfi_def_cfa_offset 32
	.cfi_offset 3, -32
	xorl	%ebx, %ebx
.L3:
	cmpl	%ebx, %ebp
	jle	.L7
	call	rand@PLT
	cvtsi2sdl	%eax, %xmm0
	addsd	%xmm0, %xmm0
	mulsd	.LC0(%rip), %xmm0
	subsd	.LC1(%rip), %xmm0
	cvtsd2ss	%xmm0, %xmm0
	movss	%xmm0, (%r12,%rbx,4)
	incq	%rbx
	jmp	.L3
.L7:
	popq	%rbx
	.cfi_def_cfa_offset 24
	popq	%rbp
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
	.cfi_endproc
.LFE2028:
	.size	_Z10RandomInitPfi, .-_Z10RandomInitPfi
	.globl	_Z30__device_stub__Z7FindMaxPKfPfiPKfPfi
	.type	_Z30__device_stub__Z7FindMaxPKfPfiPKfPfi, @function
_Z30__device_stub__Z7FindMaxPKfPfiPKfPfi:
.LFB2053:
	.cfi_startproc
	endbr64
	subq	$136, %rsp
	.cfi_def_cfa_offset 144
	movq	%rdi, 24(%rsp)
	leaq	40(%rsp), %rcx
	leaq	48(%rsp), %rdi
	movq	%rsi, 16(%rsp)
	leaq	60(%rsp), %rsi
	movl	%edx, 12(%rsp)
	leaq	32(%rsp), %rdx
	movq	%fs:40, %rax
	movq	%rax, 120(%rsp)
	xorl	%eax, %eax
	leaq	24(%rsp), %rax
	movl	$1, 56(%rsp)
	movq	%rax, 96(%rsp)
	leaq	16(%rsp), %rax
	movq	%rax, 104(%rsp)
	leaq	12(%rsp), %rax
	movq	%rax, 112(%rsp)
	movabsq	$4294967297, %rax
	movq	%rax, 48(%rsp)
	movq	%rax, 60(%rsp)
	movl	$1, 68(%rsp)
	call	__cudaPopCallConfiguration@PLT
	testl	%eax, %eax
	jne	.L8
	pushq	40(%rsp)
	.cfi_def_cfa_offset 152
	leaq	_Z7FindMaxPKfPfi(%rip), %rdi
	pushq	40(%rsp)
	.cfi_def_cfa_offset 160
	movq	76(%rsp), %rcx
	movl	84(%rsp), %r8d
	movq	64(%rsp), %rsi
	movl	72(%rsp), %edx
	leaq	112(%rsp), %r9
	call	cudaLaunchKernel@PLT
	popq	%rax
	.cfi_def_cfa_offset 152
	popq	%rdx
	.cfi_def_cfa_offset 144
.L8:
	movq	120(%rsp), %rax
	subq	%fs:40, %rax
	je	.L10
	call	__stack_chk_fail@PLT
.L10:
	addq	$136, %rsp
	.cfi_def_cfa_offset 8
	ret
	.cfi_endproc
.LFE2053:
	.size	_Z30__device_stub__Z7FindMaxPKfPfiPKfPfi, .-_Z30__device_stub__Z7FindMaxPKfPfiPKfPfi
	.globl	_Z7FindMaxPKfPfi
	.type	_Z7FindMaxPKfPfi, @function
_Z7FindMaxPKfPfi:
.LFB2054:
	.cfi_startproc
	endbr64
	jmp	_Z30__device_stub__Z7FindMaxPKfPfiPKfPfi
	.cfi_endproc
.LFE2054:
	.size	_Z7FindMaxPKfPfi, .-_Z7FindMaxPKfPfi
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC3:
	.string	"Select the GPU with device ID: "
.LC4:
	.string	"%d"
.LC5:
	.string	"!!! Cannot select GPU with device ID = %d\n"
.LC6:
	.string	"Set GPU with device ID = %d\n"
.LC7:
	.string	"a"
.LC8:
	.string	"optimize_result.txt"
.LC9:
	.string	"BlockSize GridSize GPUonly TotalGPU TotalCPU SpeedUp Check\n"
.LC13:
	.string	"%4d    %7d\n"
.LC14:
	.string	"%d %d %f %f %f %f "
.LC15:
	.string	"%.23f\n"
	.section	.text.startup,"ax",@progbits
	.globl	main
	.type	main, @function
main:
.LFB2027:
	.cfi_startproc
	endbr64
	pushq	%r15
	.cfi_def_cfa_offset 16
	.cfi_offset 15, -16
	leaq	.LC3(%rip), %rsi
	movl	$2, %edi
	pushq	%r14
	.cfi_def_cfa_offset 24
	.cfi_offset 14, -24
	pushq	%r13
	.cfi_def_cfa_offset 32
	.cfi_offset 13, -32
	pushq	%r12
	.cfi_def_cfa_offset 40
	.cfi_offset 12, -40
	pushq	%rbp
	.cfi_def_cfa_offset 48
	.cfi_offset 6, -48
	pushq	%rbx
	.cfi_def_cfa_offset 56
	.cfi_offset 3, -56
	subq	$104, %rsp
	.cfi_def_cfa_offset 160
	movq	%fs:40, %rax
	movq	%rax, 88(%rsp)
	xorl	%eax, %eax
	call	__printf_chk@PLT
	leaq	28(%rsp), %rsi
	leaq	.LC4(%rip), %rdi
	xorl	%eax, %eax
	call	__isoc23_scanf@PLT
	movl	28(%rsp), %edi
	call	cudaSetDevice@PLT
	movl	28(%rsp), %edx
	testl	%eax, %eax
	je	.L14
	movl	$2, %edi
	leaq	.LC5(%rip), %rsi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	movl	$1, %edi
	call	exit@PLT
.L14:
	leaq	.LC6(%rip), %rsi
	movl	$2, %edi
	xorl	%eax, %eax
	movl	$1, %r13d
	call	__printf_chk@PLT
	leaq	48(%rsp), %rdi
	call	cudaEventCreate@PLT
	leaq	56(%rsp), %rdi
	call	cudaEventCreate@PLT
	leaq	.LC7(%rip), %rsi
	leaq	.LC8(%rip), %rdi
	call	fopen@PLT
	leaq	.LC9(%rip), %rdx
	movl	$2, %esi
	movq	%rax, %rdi
	movq	%rax, %rbx
	xorl	%eax, %eax
	call	__fprintf_chk@PLT
	movq	%rbx, %rdi
	call	fclose@PLT
.L15:
	movl	$1, %r12d
.L22:
	cvtsi2sdl	%r13d, %xmm1
	movsd	.LC11(%rip), %xmm0
	movl	$0x00000000, 32(%rsp)
	movl	$0x00000000, 36(%rsp)
	movl	$0x00000000, 40(%rsp)
	movl	$0x00000000, 44(%rsp)
	call	pow@PLT
	cvtsi2sdl	%r12d, %xmm1
	cvttsd2sil	%xmm0, %r14d
	movsd	.LC12(%rip), %xmm0
	call	pow@PLT
	leaq	.LC13(%rip), %rsi
	movl	$2, %edi
	xorl	%eax, %eax
	cvttsd2sil	%xmm0, %ebp
	movl	%r14d, %edx
	movl	%ebp, %ecx
	leal	0(,%rbp,4), %ebx
	call	__printf_chk@PLT
	movl	$327680028, %edi
	movslq	%ebx, %rbx
	call	malloc@PLT
	movq	%rbx, %rdi
	movq	%rax, %r15
	movq	%rax, h_A(%rip)
	call	malloc@PLT
	movl	$81920007, %esi
	movq	%r15, %rdi
	movq	%rax, h_C(%rip)
	call	_Z10RandomInitPfi
	movq	48(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movl	$327680028, %esi
	leaq	d_A(%rip), %rdi
	call	cudaMalloc@PLT
	movq	%rbx, %rsi
	leaq	d_C(%rip), %rdi
	call	cudaMalloc@PLT
	movl	$1, %ecx
	movl	$327680028, %edx
	movq	h_A(%rip), %rsi
	movq	d_A(%rip), %rdi
	call	cudaMemcpy@PLT
	movq	56(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movq	56(%rsp), %rdi
	call	cudaEventSynchronize@PLT
	movq	56(%rsp), %rdx
	movq	48(%rsp), %rsi
	leaq	32(%rsp), %rdi
	call	cudaEventElapsedTime@PLT
	movq	48(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movl	%r14d, 76(%rsp)
	leal	0(,%r14,4), %r8d
	xorl	%r9d, %r9d
	movabsq	$4294967297, %rax
	movl	%ebp, 64(%rsp)
	movslq	%r8d, %r8
	movq	%rax, 80(%rsp)
	movl	84(%rsp), %ecx
	movq	%rax, 68(%rsp)
	movq	76(%rsp), %rdx
	movq	64(%rsp), %rdi
	movl	72(%rsp), %esi
	call	__cudaPushCallConfiguration@PLT
	testl	%eax, %eax
	jne	.L16
	movq	d_C(%rip), %rsi
	movq	d_A(%rip), %rdi
	movl	$81920007, %edx
	call	_Z30__device_stub__Z7FindMaxPKfPfiPKfPfi
.L16:
	movq	56(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movq	56(%rsp), %rdi
	call	cudaEventSynchronize@PLT
	movq	56(%rsp), %rdx
	movq	48(%rsp), %rsi
	leaq	36(%rsp), %rdi
	call	cudaEventElapsedTime@PLT
	movq	48(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movq	d_C(%rip), %rsi
	movq	%rbx, %rdx
	movq	h_C(%rip), %rdi
	movl	$2, %ecx
	call	cudaMemcpy@PLT
	movq	d_A(%rip), %rdi
	call	cudaFree@PLT
	movq	d_C(%rip), %rdi
	call	cudaFree@PLT
	movl	$0xc0000000, 4(%rsp)
	movq	h_C(%rip), %rdx
	xorl	%eax, %eax
.L17:
	cmpl	%eax, %ebp
	jle	.L29
	movss	(%rdx,%rax,4), %xmm0
	maxss	4(%rsp), %xmm0
	incq	%rax
	movss	%xmm0, 4(%rsp)
	jmp	.L17
.L29:
	movq	56(%rsp), %rdi
	xorl	%esi, %esi
	call	cudaEventRecord@PLT
	movq	56(%rsp), %rdi
	call	cudaEventSynchronize@PLT
	movq	56(%rsp), %rdx
	movq	48(%rsp), %rsi
	leaq	40(%rsp), %rdi
	call	cudaEventElapsedTime@PLT
	movss	32(%rsp), %xmm0
	addss	36(%rsp), %xmm0
	xorl	%esi, %esi
	addss	40(%rsp), %xmm0
	movq	48(%rsp), %rdi
	movss	%xmm0, 8(%rsp)
	call	cudaEventRecord@PLT
	movq	h_A(%rip), %rdx
	movss	.LC2(%rip), %xmm4
	xorl	%eax, %eax
.L21:
	movss	(%rdx,%rax,4), %xmm0
	incq	%rax
	maxss	%xmm4, %xmm0
	movaps	%xmm0, %xmm4
	cmpq	$81920007, %rax
	jne	.L21
	movq	56(%rsp), %rdi
	xorl	%esi, %esi
	movss	%xmm0, 12(%rsp)
	incl	%r12d
	call	cudaEventRecord@PLT
	movq	56(%rsp), %rdi
	call	cudaEventSynchronize@PLT
	movq	56(%rsp), %rdx
	movq	48(%rsp), %rsi
	leaq	44(%rsp), %rdi
	call	cudaEventElapsedTime@PLT
	movq	h_A(%rip), %rdi
	call	free@PLT
	movq	h_C(%rip), %rdi
	call	free@PLT
	leaq	.LC7(%rip), %rsi
	leaq	.LC8(%rip), %rdi
	call	fopen@PLT
	movl	%ebp, %r8d
	movl	%r14d, %ecx
	movl	$2, %esi
	movss	44(%rsp), %xmm2
	movq	%rax, %rbx
	movq	%rax, %rdi
	leaq	.LC14(%rip), %rdx
	movb	$4, %al
	cvtss2sd	8(%rsp), %xmm1
	cvtss2sd	36(%rsp), %xmm0
	movaps	%xmm2, %xmm3
	cvtss2sd	%xmm2, %xmm2
	divss	8(%rsp), %xmm3
	cvtss2sd	%xmm3, %xmm3
	call	__fprintf_chk@PLT
	movss	12(%rsp), %xmm4
	movq	%rbx, %rdi
	movb	$1, %al
	movss	4(%rsp), %xmm0
	leaq	.LC15(%rip), %rdx
	movl	$2, %esi
	subss	%xmm4, %xmm0
	cvtss2sd	%xmm0, %xmm0
	call	__fprintf_chk@PLT
	movq	%rbx, %rdi
	call	fclose@PLT
	cmpl	$5, %r12d
	jne	.L22
	incl	%r13d
	cmpl	$11, %r13d
	jne	.L15
	movq	48(%rsp), %rdi
	call	cudaEventDestroy@PLT
	movq	56(%rsp), %rdi
	call	cudaEventDestroy@PLT
	call	cudaDeviceReset@PLT
	movq	88(%rsp), %rax
	subq	%fs:40, %rax
	je	.L24
	call	__stack_chk_fail@PLT
.L24:
	addq	$104, %rsp
	.cfi_def_cfa_offset 56
	xorl	%eax, %eax
	popq	%rbx
	.cfi_def_cfa_offset 48
	popq	%rbp
	.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
	ret
	.cfi_endproc
.LFE2027:
	.size	main, .-main
	.section	.rodata.str1.1
.LC16:
	.string	"_Z7FindMaxPKfPfi"
	.section	.text.startup
	.type	_ZL24__sti____cudaRegisterAllv, @function
_ZL24__sti____cudaRegisterAllv:
.LFB2056:
	.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	.LC16(%rip), %rdx
	movq	%rax, %rdi
	leaq	_Z7FindMaxPKfPfi(%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
.LFE2056:
	.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
	.globl	d_C
	.bss
	.align 8
	.type	d_C, @object
	.size	d_C, 8
d_C:
	.zero	8
	.globl	d_A
	.align 8
	.type	d_A, @object
	.size	d_A, 8
d_A:
	.zero	8
	.globl	h_C
	.align 8
	.type	h_C, @object
	.size	h_C, 8
h_C:
	.zero	8
	.globl	h_A
	.align 8
	.type	h_A, @object
	.size	h_A, 8
h_A:
	.zero	8
	.section	.rodata.cst8,"aM",@progbits,8
	.align 8
.LC0:
	.long	0
	.long	1040187392
	.align 8
.LC1:
	.long	0
	.long	1072693248
	.section	.rodata.cst4,"aM",@progbits,4
	.align 4
.LC2:
	.long	-1073741824
	.section	.rodata.cst8
	.align 8
.LC11:
	.long	0
	.long	1073741824
	.align 8
.LC12:
	.long	0
	.long	1076101120
	.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 <hip/hip_runtime.h>
#include <stdio.h>
#include <stdlib.h>

// Variables
float* h_A;   // host vectors
float* h_C;
float* d_A;   // device vectors
float* d_C;

// Functions
void RandomInit(float*, int);
__global__ void FindMax(const float*, float*, int);

// Host Code
int main(){
	// Settings
	// gid		-> GPU device id (0, 1, ...)
	// err		-> error message get from CUDA calls
	// N 		-> Length of an array
	// size 	-> memory size of the allocate array
	// sb 		-> memory size after handle by GPU
	// sm 		-> size of shared memory in each individual block
	// m  		-> the power of threadsPerBlock
	// threadsPerBlock, blocksPerGrid -> For launching kernel
	// 
	// start, stop		-> CUDA event timer
	// Intime			-> Calculate the input time, allocate and move data in device memory
	// gputime			-> Time spent in GPU only
	// Outime			-> Time used to handle the rest of finding maximum
	// gputime_tot		-> Time total spent
	// 
	// max_value		-> Maximum value inside this array, find by GPU
	int gid;
	hipError_t err;
	int N;
	int size, sb;
	int sm;
	int threadsPerBlock, blocksPerGrid;
	hipEvent_t start, stop;
	float Intime, gputime, Outime, gputime_tot, cputime;
    float max_value;
    float max_value_CPU;
    FILE *output;

    // Optimize block size and grid size , with array length N.
    N = 81920007;
    size = N * sizeof(float);

	// Select GPU device
    printf("Select the GPU with device ID: "); 
    scanf("%d", &gid);
    err = hipSetDevice(gid);
    if (err != hipSuccess) {
		printf("!!! Cannot select GPU with device ID = %d\n", gid);
	  	exit(1);
    }
    printf("Set GPU with device ID = %d\n", gid);

    // Create the timer
    hipEventCreate(&start);
    hipEventCreate(&stop);

    output = fopen("optimize_result.txt", "a");
    fprintf(output, "BlockSize GridSize GPUonly TotalGPU TotalCPU SpeedUp Check\n");
    fclose(output);

    // m -> the power of the block size
    // g -> the power of the grid size
    for(int m = 1; m <= 10; m = m+1){
        for(int g = 1; g <= 4; g = g+1){

            Intime = 0.0;
            gputime = 0.0;
            Outime = 0.0;
            gputime_tot = 0.0;
            cputime = 0.0;
            max_value = -2.0;
            max_value_CPU = -2.0;

            threadsPerBlock = pow(2, m);
            blocksPerGrid = pow(10, g);
            printf("%4d    %7d\n", threadsPerBlock, blocksPerGrid);

            // Allocate input array
            sb = blocksPerGrid * sizeof(float);
            h_A = (float*)malloc(size);
            h_C = (float*)malloc(sb);
            
            // Initialize input vectors
            RandomInit(h_A, N);

            // Start the timer: Record allocate memory and move data, from host to device
            hipEventRecord(start, 0);

            // Allocate the array in device memory
            hipMalloc((void**)&d_A, size);
            hipMalloc((void**)&d_C, sb);

            // Copy array from host to device memory
            hipMemcpy(d_A, h_A, size, hipMemcpyHostToDevice);

            // Stop the timer: Record allocate memory and move data, from host to device
            hipEventRecord(stop, 0);
            hipEventSynchronize(stop);

            // Calculate spend time: Record allocate memory and move data, from host to device
            hipEventElapsedTime(&Intime, start, stop);

            // start the timer
            hipEventRecord(start, 0);

            // Called the kernel
            sm = threadsPerBlock * sizeof(float);
            FindMax <<< blocksPerGrid, threadsPerBlock, sm >>>(d_A, d_C, N);
            
            // stop the timer
            hipEventRecord(stop, 0);
            hipEventSynchronize(stop);
            
            // Calculate spend time: Matrix Addition calculation time
            hipEventElapsedTime(&gputime, start, stop);

            // start the timer
            hipEventRecord(start,0);
            
            // Copy result from device memory to host memory
            // h_C contains the result of each block in host memory
            hipMemcpy(h_C, d_C, sb, hipMemcpyDeviceToHost);

            hipFree(d_A);
            hipFree(d_C);

            for(int i = 0; i < blocksPerGrid; i = i+1){
                if(h_C[i] > max_value){
                    max_value = h_C[i];
                }
            }

            // stop the timer
            hipEventRecord(stop, 0);
            hipEventSynchronize(stop);

            hipEventElapsedTime( &Outime, start, stop);
            gputime_tot = Intime + gputime + Outime;

            // start the timer
            hipEventRecord(start, 0);

            // Compute the reference solution
            for(int i = 0; i < N; i = i+1){
                if(h_A[i] > max_value_CPU){
                    max_value_CPU = h_A[i];
                }
            }
            
            // stop the timer
            hipEventRecord(stop, 0);
            hipEventSynchronize(stop);

            hipEventElapsedTime(&cputime, start, stop);

            free(h_A);
            free(h_C);

            // Write to file
            output = fopen("optimize_result.txt", "a");
            fprintf(output, "%d %d %f %f %f %f ", threadsPerBlock, blocksPerGrid, gputime, gputime_tot, cputime, cputime/gputime_tot);
            fprintf(output, "%.23f\n", max_value - max_value_CPU);
            fclose(output);
            

        }
    }


    // Destroy the timer
    hipEventDestroy(start);
    hipEventDestroy(stop);

    // Reset the device
    hipDeviceReset();

    return 0;
}

__global__ void FindMax(const float* A, float* C, int N){
    extern __shared__ float cache[];

    int i = blockDim.x * blockIdx.x + threadIdx.x;
    int cacheIndex = threadIdx.x;

    float max = -2.0;

    while (i < N) {
        if(A[i] > max){
        	max = A[i];
        }
        i = i + blockDim.x * gridDim.x;  
    }
   
    cache[cacheIndex] = max;

    __syncthreads();

    // Perform parallel reduction, threadsPerBlock must be 2^m
    int ib = blockDim.x/2;
    while (ib != 0) {
    	if(cacheIndex < ib){
    		if(cache[cacheIndex] < cache[cacheIndex + ib]){
      			cache[cacheIndex] = cache[cacheIndex + ib];
      		}
    	}

      	__syncthreads();

      	ib = ib / 2;
    }
    
    if(cacheIndex == 0){
    	C[blockIdx.x] = cache[0];
    }

}

// Allocates an array with random float entries in (-1,1)
void RandomInit(float* data, int n){
    for (int i = 0; i < n; ++i)
        data[i] = 2.0*rand()/(float)RAND_MAX - 1.0;
}
	.text
	.file	"findMax_Optimize.hip"
	.section	.rodata.cst8,"aM",@progbits,8
	.p2align	3, 0x0                          # -- Begin function main
.LCPI0_0:
	.quad	0x3ff0000000000000              # double 1
.LCPI0_1:
	.quad	0x4024000000000000              # double 10
.LCPI0_2:
	.quad	0x3e00000000000000              # double 4.6566128730773926E-10
.LCPI0_3:
	.quad	0xbff0000000000000              # double -1
	.section	.rodata.cst4,"aM",@progbits,4
	.p2align	2, 0x0
.LCPI0_4:
	.long	0xc0000000                      # float -2
	.text
	.globl	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	$72, %rsp
	.cfi_def_cfa_offset 128
	.cfi_offset %rbx, -56
	.cfi_offset %r12, -48
	.cfi_offset %r13, -40
	.cfi_offset %r14, -32
	.cfi_offset %r15, -24
	.cfi_offset %rbp, -16
	movl	$.L.str, %edi
	xorl	%eax, %eax
	callq	printf
	leaq	68(%rsp), %rbx
	movl	$.L.str.1, %edi
	movq	%rbx, %rsi
	xorl	%eax, %eax
	callq	__isoc23_scanf
	movl	(%rbx), %edi
	callq	hipSetDevice
	movl	(%rbx), %esi
	testl	%eax, %eax
	jne	.LBB0_15
# %bb.1:
	movl	$.L.str.3, %edi
	xorl	%eax, %eax
	callq	printf
	leaq	8(%rsp), %rdi
	callq	hipEventCreate
	movq	%rsp, %rdi
	callq	hipEventCreate
	movl	$.L.str.4, %edi
	movl	$.L.str.5, %esi
	callq	fopen
	movq	%rax, %rbx
	movl	$.L.str.6, %edi
	movl	$59, %esi
	movl	$1, %edx
	movq	%rax, %rcx
	callq	fwrite@PLT
	movq	%rbx, %rdi
	callq	fclose
	movl	$1, 20(%rsp)                    # 4-byte Folded Spill
	movsd	.LCPI0_0(%rip), %xmm0           # xmm0 = mem[0],zero
.LBB0_2:                                # %.preheader
                                        # =>This Loop Header: Depth=1
                                        #     Child Loop BB0_3 Depth 2
                                        #       Child Loop BB0_4 Depth 3
                                        #       Child Loop BB0_9 Depth 3
                                        #       Child Loop BB0_11 Depth 3
	movapd	%xmm0, %xmm1
	movl	$1, %ebx
.LBB0_3:                                #   Parent Loop BB0_2 Depth=1
                                        # =>  This Loop Header: Depth=2
                                        #       Child Loop BB0_4 Depth 3
                                        #       Child Loop BB0_9 Depth 3
                                        #       Child Loop BB0_11 Depth 3
	movsd	%xmm1, 56(%rsp)                 # 8-byte Spill
	xorl	%eax, %eax
	movl	%eax, 44(%rsp)
	movl	%eax, 32(%rsp)
	movl	%eax, 40(%rsp)
	movl	%eax, 36(%rsp)
	movl	20(%rsp), %edi                  # 4-byte Reload
	callq	ldexp@PLT
	cvttsd2si	%xmm0, %ebp
	movsd	.LCPI0_1(%rip), %xmm0           # xmm0 = mem[0],zero
	movsd	56(%rsp), %xmm1                 # 8-byte Reload
                                        # xmm1 = mem[0],zero
	callq	pow
	cvttsd2si	%xmm0, %r14d
	movl	$.L.str.7, %edi
	movl	%ebp, %esi
	movl	%r14d, %edx
	xorl	%eax, %eax
	callq	printf
	leal	(,%r14,4), %r15d
	movl	$327680028, %edi                # imm = 0x1388001C
	callq	malloc
	movq	%rax, %r12
	movq	%rax, h_A(%rip)
	movslq	%r15d, %r15
	movq	%r15, %rdi
	callq	malloc
	movq	%rax, h_C(%rip)
	xorl	%r13d, %r13d
.LBB0_4:                                # %.lr.ph.i
                                        #   Parent Loop BB0_2 Depth=1
                                        #     Parent Loop BB0_3 Depth=2
                                        # =>    This Inner Loop Header: Depth=3
	callq	rand
	xorps	%xmm0, %xmm0
	cvtsi2sd	%eax, %xmm0
	addsd	%xmm0, %xmm0
	mulsd	.LCPI0_2(%rip), %xmm0
	addsd	.LCPI0_3(%rip), %xmm0
	cvtsd2ss	%xmm0, %xmm0
	movss	%xmm0, (%r12,%r13,4)
	incq	%r13
	cmpq	$81920007, %r13                 # imm = 0x4E20007
	jne	.LBB0_4
# %bb.5:                                # %_Z10RandomInitPfi.exit
                                        #   in Loop: Header=BB0_3 Depth=2
	movq	8(%rsp), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	movl	$d_A, %edi
	movl	$327680028, %esi                # imm = 0x1388001C
	callq	hipMalloc
	movl	$d_C, %edi
	movq	%r15, %rsi
	callq	hipMalloc
	movq	d_A(%rip), %rdi
	movq	h_A(%rip), %rsi
	movl	$327680028, %edx                # imm = 0x1388001C
	movl	$1, %ecx
	callq	hipMemcpy
	movq	(%rsp), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	movq	(%rsp), %rdi
	callq	hipEventSynchronize
	movq	8(%rsp), %rsi
	movq	(%rsp), %rdx
	leaq	44(%rsp), %rdi
	callq	hipEventElapsedTime
	movq	8(%rsp), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	leal	(,%rbp,4), %eax
	movslq	%eax, %r8
	movl	%r14d, %r12d
	movq	%r12, %rdi
	movabsq	$4294967296, %rax               # imm = 0x100000000
	orq	%rax, %rdi
	movl	%ebp, %edx
	orq	%rax, %rdx
	movl	$1, %esi
	movl	$1, %ecx
	xorl	%r9d, %r9d
	callq	__hipPushCallConfiguration
	testl	%eax, %eax
	jne	.LBB0_7
# %bb.6:                                #   in Loop: Header=BB0_3 Depth=2
	movq	d_A(%rip), %rdi
	movq	d_C(%rip), %rsi
	movl	$81920007, %edx                 # imm = 0x4E20007
	callq	_Z22__device_stub__FindMaxPKfPfi
.LBB0_7:                                #   in Loop: Header=BB0_3 Depth=2
	movq	(%rsp), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	movq	(%rsp), %rdi
	callq	hipEventSynchronize
	movq	8(%rsp), %rsi
	movq	(%rsp), %rdx
	leaq	32(%rsp), %rdi
	callq	hipEventElapsedTime
	movq	8(%rsp), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	movq	h_C(%rip), %rdi
	movq	d_C(%rip), %rsi
	movq	%r15, %rdx
	movl	$2, %ecx
	callq	hipMemcpy
	movq	d_A(%rip), %rdi
	callq	hipFree
	movq	d_C(%rip), %rdi
	callq	hipFree
	movss	.LCPI0_4(%rip), %xmm1           # xmm1 = mem[0],zero,zero,zero
	testl	%r14d, %r14d
	jle	.LBB0_10
# %bb.8:                                # %.lr.ph
                                        #   in Loop: Header=BB0_3 Depth=2
	movq	h_C(%rip), %rax
	xorl	%ecx, %ecx
	movss	.LCPI0_4(%rip), %xmm0           # xmm0 = mem[0],zero,zero,zero
.LBB0_9:                                #   Parent Loop BB0_2 Depth=1
                                        #     Parent Loop BB0_3 Depth=2
                                        # =>    This Inner Loop Header: Depth=3
	movss	(%rax,%rcx,4), %xmm1            # xmm1 = mem[0],zero,zero,zero
	maxss	%xmm0, %xmm1
	incq	%rcx
	movaps	%xmm1, %xmm0
	cmpq	%rcx, %r12
	jne	.LBB0_9
.LBB0_10:                               # %._crit_edge
                                        #   in Loop: Header=BB0_3 Depth=2
	movss	%xmm1, 52(%rsp)                 # 4-byte Spill
	movq	(%rsp), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	movq	(%rsp), %rdi
	callq	hipEventSynchronize
	movq	8(%rsp), %rsi
	movq	(%rsp), %rdx
	leaq	40(%rsp), %rdi
	callq	hipEventElapsedTime
	movss	44(%rsp), %xmm0                 # xmm0 = mem[0],zero,zero,zero
	movss	%xmm0, 28(%rsp)                 # 4-byte Spill
	movss	32(%rsp), %xmm0                 # xmm0 = mem[0],zero,zero,zero
	movss	%xmm0, 48(%rsp)                 # 4-byte Spill
	movss	40(%rsp), %xmm0                 # xmm0 = mem[0],zero,zero,zero
	movss	%xmm0, 24(%rsp)                 # 4-byte Spill
	movq	8(%rsp), %rdi
	xorl	%esi, %esi
	callq	hipEventRecord
	movq	h_A(%rip), %rax
	xorl	%ecx, %ecx
	movss	.LCPI0_4(%rip), %xmm1           # xmm1 = mem[0],zero,zero,zero
.LBB0_11:                               #   Parent Loop BB0_2 Depth=1
                                        #     Parent Loop BB0_3 Depth=2
                                        # =>    This Inner Loop Header: Depth=3
	movaps	%xmm1, %xmm0
	movss	(%rax,%rcx,4), %xmm1            # xmm1 = mem[0],zero,zero,zero
	maxss	%xmm0, %xmm1
	incq	%rcx
	cmpq	$81920007, %rcx                 # imm = 0x4E20007
	jne	.LBB0_11
# %bb.12:                               #   in Loop: Header=BB0_3 Depth=2
	movss	28(%rsp), %xmm0                 # 4-byte Reload
                                        # xmm0 = mem[0],zero,zero,zero
	addss	48(%rsp), %xmm0                 # 4-byte Folded Reload
	addss	24(%rsp), %xmm0                 # 4-byte Folded Reload
	movss	%xmm0, 28(%rsp)                 # 4-byte Spill
	movq	(%rsp), %rdi
	xorl	%esi, %esi
	movss	%xmm1, 24(%rsp)                 # 4-byte Spill
	callq	hipEventRecord
	movq	(%rsp), %rdi
	callq	hipEventSynchronize
	movq	8(%rsp), %rsi
	movq	(%rsp), %rdx
	leaq	36(%rsp), %rdi
	callq	hipEventElapsedTime
	movq	h_A(%rip), %rdi
	callq	free
	movq	h_C(%rip), %rdi
	callq	free
	movl	$.L.str.4, %edi
	movl	$.L.str.5, %esi
	callq	fopen
	movq	%rax, %r15
	xorps	%xmm0, %xmm0
	cvtss2sd	32(%rsp), %xmm0
	movss	28(%rsp), %xmm4                 # 4-byte Reload
                                        # xmm4 = mem[0],zero,zero,zero
	xorps	%xmm1, %xmm1
	cvtss2sd	%xmm4, %xmm1
	movss	36(%rsp), %xmm3                 # xmm3 = mem[0],zero,zero,zero
	cvtss2sd	%xmm3, %xmm2
	divss	%xmm4, %xmm3
	cvtss2sd	%xmm3, %xmm3
	movl	$.L.str.8, %esi
	movq	%rax, %rdi
	movl	%ebp, %edx
	movl	%r14d, %ecx
	movb	$4, %al
	callq	fprintf
	movss	52(%rsp), %xmm0                 # 4-byte Reload
                                        # xmm0 = mem[0],zero,zero,zero
	subss	24(%rsp), %xmm0                 # 4-byte Folded Reload
	cvtss2sd	%xmm0, %xmm0
	movl	$.L.str.9, %esi
	movq	%r15, %rdi
	movb	$1, %al
	callq	fprintf
	movq	%r15, %rdi
	callq	fclose
	movsd	.LCPI0_0(%rip), %xmm0           # xmm0 = mem[0],zero
	movsd	56(%rsp), %xmm1                 # 8-byte Reload
                                        # xmm1 = mem[0],zero
	addsd	%xmm0, %xmm1
	incl	%ebx
	cmpl	$5, %ebx
	jne	.LBB0_3
# %bb.13:                               #   in Loop: Header=BB0_2 Depth=1
	movl	20(%rsp), %eax                  # 4-byte Reload
	incl	%eax
	movl	%eax, 20(%rsp)                  # 4-byte Spill
	cmpl	$11, %eax
	jne	.LBB0_2
# %bb.14:
	movq	8(%rsp), %rdi
	callq	hipEventDestroy
	movq	(%rsp), %rdi
	callq	hipEventDestroy
	callq	hipDeviceReset
	xorl	%eax, %eax
	addq	$72, %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
.LBB0_15:
	.cfi_def_cfa_offset 128
	movl	$.L.str.2, %edi
	xorl	%eax, %eax
	callq	printf
	movl	$1, %edi
	callq	exit
.Lfunc_end0:
	.size	main, .Lfunc_end0-main
	.cfi_endproc
                                        # -- End function
	.section	.rodata.cst8,"aM",@progbits,8
	.p2align	3, 0x0                          # -- Begin function _Z10RandomInitPfi
.LCPI1_0:
	.quad	0x3e00000000000000              # double 4.6566128730773926E-10
.LCPI1_1:
	.quad	0xbff0000000000000              # double -1
	.text
	.globl	_Z10RandomInitPfi
	.type	_Z10RandomInitPfi,@function
_Z10RandomInitPfi:                      # @_Z10RandomInitPfi
	.cfi_startproc
# %bb.0:
	testl	%esi, %esi
	jle	.LBB1_4
# %bb.1:                                # %.lr.ph.preheader
	pushq	%r15
	.cfi_def_cfa_offset 16
	pushq	%r14
	.cfi_def_cfa_offset 24
	pushq	%rbx
	.cfi_def_cfa_offset 32
	.cfi_offset %rbx, -32
	.cfi_offset %r14, -24
	.cfi_offset %r15, -16
	movq	%rdi, %rbx
	movl	%esi, %r14d
	xorl	%r15d, %r15d
.LBB1_2:                                # %.lr.ph
                                        # =>This Inner Loop Header: Depth=1
	callq	rand
	xorps	%xmm0, %xmm0
	cvtsi2sd	%eax, %xmm0
	addsd	%xmm0, %xmm0
	mulsd	.LCPI1_0(%rip), %xmm0
	addsd	.LCPI1_1(%rip), %xmm0
	cvtsd2ss	%xmm0, %xmm0
	movss	%xmm0, (%rbx,%r15,4)
	incq	%r15
	cmpq	%r15, %r14
	jne	.LBB1_2
# %bb.3:
	popq	%rbx
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	.cfi_restore %rbx
	.cfi_restore %r14
	.cfi_restore %r15
.LBB1_4:                                # %._crit_edge
	retq
.Lfunc_end1:
	.size	_Z10RandomInitPfi, .Lfunc_end1-_Z10RandomInitPfi
	.cfi_endproc
                                        # -- End function
	.globl	_Z22__device_stub__FindMaxPKfPfi # -- Begin function _Z22__device_stub__FindMaxPKfPfi
	.type	_Z22__device_stub__FindMaxPKfPfi,@function
_Z22__device_stub__FindMaxPKfPfi:       # @_Z22__device_stub__FindMaxPKfPfi
	.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), %rcx
	movq	%rsi, (%rcx)
	leaq	12(%rsp), %rsi
	movl	%edx, (%rsi)
	leaq	80(%rsp), %rbx
	movq	%rax, (%rbx)
	movq	%rcx, 8(%rbx)
	movq	%rsi, 16(%rbx)
	leaq	64(%rsp), %r14
	leaq	48(%rsp), %r15
	leaq	24(%rsp), %r12
	leaq	16(%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	$_Z7FindMaxPKfPfi, %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	_Z22__device_stub__FindMaxPKfPfi, .Lfunc_end2-_Z22__device_stub__FindMaxPKfPfi
	.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	$_Z7FindMaxPKfPfi, %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	h_A,@object                     # @h_A
	.bss
	.globl	h_A
	.p2align	3, 0x0
h_A:
	.quad	0
	.size	h_A, 8

	.type	h_C,@object                     # @h_C
	.globl	h_C
	.p2align	3, 0x0
h_C:
	.quad	0
	.size	h_C, 8

	.type	d_A,@object                     # @d_A
	.globl	d_A
	.p2align	3, 0x0
d_A:
	.quad	0
	.size	d_A, 8

	.type	d_C,@object                     # @d_C
	.globl	d_C
	.p2align	3, 0x0
d_C:
	.quad	0
	.size	d_C, 8

	.type	.L.str,@object                  # @.str
	.section	.rodata.str1.1,"aMS",@progbits,1
.L.str:
	.asciz	"Select the GPU with device ID: "
	.size	.L.str, 32

	.type	.L.str.1,@object                # @.str.1
.L.str.1:
	.asciz	"%d"
	.size	.L.str.1, 3

	.type	.L.str.2,@object                # @.str.2
.L.str.2:
	.asciz	"!!! Cannot select GPU with device ID = %d\n"
	.size	.L.str.2, 43

	.type	.L.str.3,@object                # @.str.3
.L.str.3:
	.asciz	"Set GPU with device ID = %d\n"
	.size	.L.str.3, 29

	.type	.L.str.4,@object                # @.str.4
.L.str.4:
	.asciz	"optimize_result.txt"
	.size	.L.str.4, 20

	.type	.L.str.5,@object                # @.str.5
.L.str.5:
	.asciz	"a"
	.size	.L.str.5, 2

	.type	.L.str.6,@object                # @.str.6
.L.str.6:
	.asciz	"BlockSize GridSize GPUonly TotalGPU TotalCPU SpeedUp Check\n"
	.size	.L.str.6, 60

	.type	.L.str.7,@object                # @.str.7
.L.str.7:
	.asciz	"%4d    %7d\n"
	.size	.L.str.7, 12

	.type	_Z7FindMaxPKfPfi,@object        # @_Z7FindMaxPKfPfi
	.section	.rodata,"a",@progbits
	.globl	_Z7FindMaxPKfPfi
	.p2align	3, 0x0
_Z7FindMaxPKfPfi:
	.quad	_Z22__device_stub__FindMaxPKfPfi
	.size	_Z7FindMaxPKfPfi, 8

	.type	.L.str.8,@object                # @.str.8
	.section	.rodata.str1.1,"aMS",@progbits,1
.L.str.8:
	.asciz	"%d %d %f %f %f %f "
	.size	.L.str.8, 19

	.type	.L.str.9,@object                # @.str.9
.L.str.9:
	.asciz	"%.23f\n"
	.size	.L.str.9, 7

	.type	.L__unnamed_1,@object           # @0
.L__unnamed_1:
	.asciz	"_Z7FindMaxPKfPfi"
	.size	.L__unnamed_1, 17

	.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 _Z22__device_stub__FindMaxPKfPfi
	.addrsig_sym __hip_module_ctor
	.addrsig_sym __hip_module_dtor
	.addrsig_sym d_A
	.addrsig_sym d_C
	.addrsig_sym _Z7FindMaxPKfPfi
	.addrsig_sym __hip_fatbin
	.addrsig_sym __hip_fatbin_wrapper
	.addrsig_sym __hip_cuid_

	.text
	.amdgcn_target "amdgcn-amd-amdhsa--gfx1100"
	.protected	_Z7FindMaxPKfPfi        ; -- Begin function _Z7FindMaxPKfPfi
	.globl	_Z7FindMaxPKfPfi
	.p2align	8
	.type	_Z7FindMaxPKfPfi,@function
_Z7FindMaxPKfPfi:                       ; @_Z7FindMaxPKfPfi
; %bb.0:
	s_clause 0x2
	s_load_b32 s3, s[0:1], 0x24
	s_load_b32 s8, s[0:1], 0x10
	s_load_b128 s[4:7], s[0:1], 0x0
	s_add_u32 s0, s0, 24
	s_mov_b32 s2, s15
	s_addc_u32 s1, s1, 0
	v_mov_b32_e32 v3, -2.0
	s_mov_b32 s9, exec_lo
	s_waitcnt lgkmcnt(0)
	s_and_b32 s3, s3, 0xffff
	s_delay_alu instid0(SALU_CYCLE_1) | instskip(NEXT) | instid1(VALU_DEP_1)
	v_mad_u64_u32 v[1:2], null, s2, s3, v[0:1]
	v_cmpx_gt_i32_e64 s8, v1
	s_cbranch_execz .LBB0_4
; %bb.1:                                ; %.lr.ph
	s_load_b32 s10, s[0:1], 0x0
	v_mov_b32_e32 v3, -2.0
	s_mov_b32 s1, 0
	s_waitcnt lgkmcnt(0)
	s_mul_i32 s10, s10, s3
.LBB0_2:                                ; =>This Inner Loop Header: Depth=1
	v_ashrrev_i32_e32 v2, 31, v1
	s_delay_alu instid0(VALU_DEP_1) | instskip(SKIP_1) | instid1(VALU_DEP_2)
	v_lshlrev_b64 v[4:5], 2, v[1:2]
	v_add_nc_u32_e32 v1, s10, v1
	v_add_co_u32 v4, vcc_lo, s4, v4
	s_delay_alu instid0(VALU_DEP_3) | instskip(NEXT) | instid1(VALU_DEP_3)
	v_add_co_ci_u32_e32 v5, vcc_lo, s5, v5, vcc_lo
	v_cmp_le_i32_e32 vcc_lo, s8, v1
	global_load_b32 v2, v[4:5], off
	s_or_b32 s1, vcc_lo, s1
	s_waitcnt vmcnt(0)
	v_cmp_gt_f32_e64 s0, v2, v3
	s_delay_alu instid0(VALU_DEP_1)
	v_cndmask_b32_e64 v3, v3, v2, s0
	s_and_not1_b32 exec_lo, exec_lo, s1
	s_cbranch_execnz .LBB0_2
; %bb.3:                                ; %Flow45
	s_or_b32 exec_lo, exec_lo, s1
.LBB0_4:                                ; %Flow46
	s_delay_alu instid0(SALU_CYCLE_1)
	s_or_b32 exec_lo, exec_lo, s9
	v_lshl_add_u32 v1, v0, 2, 0
	s_cmp_lt_u32 s3, 2
	ds_store_b32 v1, v3
	s_waitcnt lgkmcnt(0)
	s_barrier
	buffer_gl0_inv
	s_cbranch_scc1 .LBB0_9
.LBB0_5:                                ; %.lr.ph34
                                        ; =>This Inner Loop Header: Depth=1
	s_mov_b32 s0, s3
	s_lshr_b32 s3, s3, 1
	s_mov_b32 s1, exec_lo
	v_cmpx_gt_u32_e64 s3, v0
	s_cbranch_execz .LBB0_8
; %bb.6:                                ;   in Loop: Header=BB0_5 Depth=1
	v_lshl_add_u32 v2, s3, 2, v1
	ds_load_b32 v3, v1
	ds_load_b32 v2, v2
	s_waitcnt lgkmcnt(0)
	v_cmp_lt_f32_e32 vcc_lo, v3, v2
	s_and_b32 exec_lo, exec_lo, vcc_lo
	s_cbranch_execz .LBB0_8
; %bb.7:                                ;   in Loop: Header=BB0_5 Depth=1
	ds_store_b32 v1, v2
.LBB0_8:                                ;   in Loop: Header=BB0_5 Depth=1
	s_or_b32 exec_lo, exec_lo, s1
	s_cmp_gt_u32 s0, 3
	s_waitcnt lgkmcnt(0)
	s_barrier
	buffer_gl0_inv
	s_cbranch_scc1 .LBB0_5
.LBB0_9:                                ; %._crit_edge35
	s_mov_b32 s0, exec_lo
	v_cmpx_eq_u32_e32 0, v0
	s_cbranch_execz .LBB0_11
; %bb.10:
	v_mov_b32_e32 v0, 0
	s_mov_b32 s3, 0
	s_delay_alu instid0(SALU_CYCLE_1) | instskip(NEXT) | instid1(SALU_CYCLE_1)
	s_lshl_b64 s[0:1], s[2:3], 2
	s_add_u32 s0, s6, s0
	ds_load_b32 v1, v0
	s_addc_u32 s1, s7, s1
	s_waitcnt lgkmcnt(0)
	global_store_b32 v0, v1, s[0:1]
.LBB0_11:
	s_nop 0
	s_sendmsg sendmsg(MSG_DEALLOC_VGPRS)
	s_endpgm
	.section	.rodata,"a",@progbits
	.p2align	6, 0x0
	.amdhsa_kernel _Z7FindMaxPKfPfi
		.amdhsa_group_segment_fixed_size 0
		.amdhsa_private_segment_fixed_size 0
		.amdhsa_kernarg_size 280
		.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 0
		.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 6
		.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	_Z7FindMaxPKfPfi, .Lfunc_end0-_Z7FindMaxPKfPfi
                                        ; -- End function
	.section	.AMDGPU.csdata,"",@progbits
; Kernel info:
; codeLenInByte = 412
; NumSgprs: 18
; NumVgprs: 6
; ScratchSize: 0
; MemoryBound: 0
; FloatMode: 240
; IeeeMode: 1
; LDSByteSize: 0 bytes/workgroup (compile time only)
; SGPRBlocks: 2
; VGPRBlocks: 0
; NumSGPRsForWavesPerEU: 18
; NumVGPRsForWavesPerEU: 6
; Occupancy: 16
; WaveLimiterHint : 0
; COMPUTE_PGM_RSRC2:SCRATCH_EN: 0
; 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
      - .offset:         16
        .size:           4
        .value_kind:     by_value
      - .offset:         24
        .size:           4
        .value_kind:     hidden_block_count_x
      - .offset:         28
        .size:           4
        .value_kind:     hidden_block_count_y
      - .offset:         32
        .size:           4
        .value_kind:     hidden_block_count_z
      - .offset:         36
        .size:           2
        .value_kind:     hidden_group_size_x
      - .offset:         38
        .size:           2
        .value_kind:     hidden_group_size_y
      - .offset:         40
        .size:           2
        .value_kind:     hidden_group_size_z
      - .offset:         42
        .size:           2
        .value_kind:     hidden_remainder_x
      - .offset:         44
        .size:           2
        .value_kind:     hidden_remainder_y
      - .offset:         46
        .size:           2
        .value_kind:     hidden_remainder_z
      - .offset:         64
        .size:           8
        .value_kind:     hidden_global_offset_x
      - .offset:         72
        .size:           8
        .value_kind:     hidden_global_offset_y
      - .offset:         80
        .size:           8
        .value_kind:     hidden_global_offset_z
      - .offset:         88
        .size:           2
        .value_kind:     hidden_grid_dims
      - .offset:         144
        .size:           4
        .value_kind:     hidden_dynamic_lds_size
    .group_segment_fixed_size: 0
    .kernarg_segment_align: 8
    .kernarg_segment_size: 280
    .language:       OpenCL C
    .language_version:
      - 2
      - 0
    .max_flat_workgroup_size: 1024
    .name:           _Z7FindMaxPKfPfi
    .private_segment_fixed_size: 0
    .sgpr_count:     18
    .sgpr_spill_count: 0
    .symbol:         _Z7FindMaxPKfPfi.kd
    .uniform_work_group_size: 1
    .uses_dynamic_stack: false
    .vgpr_count:     6
    .vgpr_spill_count: 0
    .wavefront_size: 32
    .workgroup_processor_mode: 1
amdhsa.target:   amdgcn-amd-amdhsa--gfx1100
amdhsa.version:
  - 1
  - 2
...

	.end_amdgpu_metadata
