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#include <stddef.h>
#include <berg/vm.h>
#define MATRIX_SIZE 400
static struct berg_func *compile_init(struct berg_vm *vm)
{
struct berg_gpr A = berg_gpr_tmp(0);
struct berg_gpr B = berg_gpr_tmp(1);
struct berg_gpr I = berg_gpr_tmp(2);
struct berg_gpr J = berg_gpr_tmp(3);
struct berg_gpr T = berg_gpr_tmp(4);
struct berg_operand operands[] = {
/** @todo pointer bounds in type signature? */
berg_operand_gpr(A, BERG_POINTER),
berg_operand_gpr(B, BERG_POINTER),
};
struct berg_func *f = create_berg_func(vm, BERG_VOID, 2, operands);
/* outer loop */
berg_movi(f, I, 0);
struct berg_label outer = berg_label(f);
/* stop if I >= MATRIX_SIZE */
berg_movi(f, T, MATRIX_SIZE);
struct berg_reloc outer_jmp = berg_bger(f, I, T);
/* inner loop */
berg_movi(f, J, 0);
struct berg_label inner = berg_label(f);
/* stop if J >= MATRIX_SIZE */
berg_movi(f, T, MATRIX_SIZE);
struct berg_reloc inner_jmp = berg_bger(f, J, T);
/* &[I][J] = 4 * (J + MATRIX_SIZE * I) */
berg_movi(f, T, MATRIX_SIZE);
berg_mulr(f, T, T, I);
berg_addr(f, T, T, J);
berg_lshi(f, T, T, 2);
/* A[I][J] = I */
berg_stxr_32(f, I, A, T);
/* B[I][J] = J */
berg_stxr_32(f, J, B, T);
berg_addi(f, J, J, 1);
berg_patch(f, berg_jmp(f), inner);
berg_patch(f, inner_jmp, berg_label(f));
berg_addi(f, I, I, 1);
berg_patch(f, berg_jmp(f), outer);
berg_patch(f, outer_jmp, berg_label(f));
berg_ret(f);
compile_berg_func(f);
return f;
}
static struct berg_func *compile_mult(struct berg_vm *vm)
{
/* interesting, not using anything with a register means it gets treated
* as a oneshot reg, which is an issue for arguments. */
struct berg_gpr A = berg_gpr_tmp(0);
struct berg_gpr B = berg_gpr_tmp(1);
struct berg_gpr C = berg_gpr_tmp(2);
struct berg_gpr I = berg_gpr_tmp(3);
struct berg_gpr J = berg_gpr_tmp(4);
struct berg_gpr K = berg_gpr_tmp(5);
struct berg_gpr R = berg_gpr_tmp(6);
struct berg_gpr T = berg_gpr_tmp(7);
struct berg_gpr AT = berg_gpr_tmp(8);
struct berg_gpr BT = berg_gpr_tmp(9);
struct berg_operand operands[] = {
berg_operand_gpr(A, BERG_POINTER),
berg_operand_gpr(B, BERG_POINTER),
berg_operand_gpr(C, BERG_POINTER),
};
struct berg_func *f = create_berg_func(vm, BERG_VOID, 3, operands);
/* outer loop */
berg_movi(f, I, 0);
struct berg_label outer = berg_label(f);
/* stop if I >= MATRIX_SIZE */
berg_movi(f, T, MATRIX_SIZE);
struct berg_reloc outer_jmp = berg_bger(f, I, T);
/* inner loop */
berg_movi(f, J, 0);
struct berg_label inner = berg_label(f);
/* stop if J >= MATRIX_SIZE */
berg_movi(f, T, MATRIX_SIZE);
struct berg_reloc inner_jmp = berg_bger(f, J, T);
berg_movi(f, R, 0);
/* innermost loop */
berg_movi(f, K, 0);
struct berg_label innermost = berg_label(f);
/* stop if K >= MATRIX_SIZE */
berg_movi(f, T, MATRIX_SIZE);
struct berg_reloc innermost_jmp = berg_bger(f, K, T);
/* A[I][K] */
/* &[I][K] = 4 * (K + MATRIX_SIZE * I) */
berg_movi(f, T, MATRIX_SIZE);
berg_mulr(f, T, T, I);
berg_addr(f, T, T, K);
berg_lshi(f, T, T, 2);
berg_ldxr_i32(f, AT, A, T);
/* B[K][J] */
berg_movi(f, T, MATRIX_SIZE);
berg_mulr(f, T, T, K);
berg_addr(f, T, T, J);
berg_lshi(f, T, T, 2);
berg_ldxr_i32(f, BT, B, T);
/* R += A[I][K] * B[K][J] */
berg_mulr(f, T, AT, BT);
berg_addr(f, R, R, T);
berg_addi(f, K, K, 1);
berg_patch(f, berg_jmp(f), innermost);
berg_patch(f, innermost_jmp, berg_label(f));
/* &[I][J] = 4 * (J + MATRIX_SIZE * I) */
berg_movi(f, T, MATRIX_SIZE);
berg_mulr(f, T, T, I);
berg_addr(f, T, T, J);
berg_lshi(f, T, T, 2);
/* C[I][J] = R */
berg_stxr_32(f, R, C, T);
berg_addi(f, J, J, 1);
berg_patch(f, berg_jmp(f), inner);
berg_patch(f, inner_jmp, berg_label(f));
berg_addi(f, I, I, 1);
berg_patch(f, berg_jmp(f), outer);
berg_patch(f, outer_jmp, berg_label(f));
berg_ret(f);
compile_berg_func(f);
return f;
}
static struct berg_func *compile_dump(struct berg_vm *vm)
{
struct berg_gpr A0 = berg_gpr_arg(0);
struct berg_gpr C = berg_gpr_tmp(0);
struct berg_gpr I = berg_gpr_tmp(1);
struct berg_gpr J = berg_gpr_tmp(2);
struct berg_gpr T = berg_gpr_tmp(3);
struct berg_gpr S = berg_gpr_tmp(4);
struct berg_operand operands[] = {
berg_operand_gpr(C, BERG_POINTER),
};
struct berg_func *f = create_berg_func(vm, BERG_VOID, 1, operands);
berg_movi(f, S, 0);
/* outer loop */
berg_movi(f, I, 0);
struct berg_label outer = berg_label(f);
/* stop if I >= MATRIX_SIZE */
berg_movi(f, T, MATRIX_SIZE);
struct berg_reloc outer_jmp = berg_bger(f, I, T);
/* inner loop */
berg_movi(f, J, 0);
struct berg_label inner = berg_label(f);
/* stop if J >= MATRIX_SIZE */
berg_movi(f, T, MATRIX_SIZE);
struct berg_reloc inner_jmp = berg_bger(f, J, T);
/* &[I][J] = 4 * (J + MATRIX_SIZE * I) */
berg_movi(f, T, MATRIX_SIZE);
berg_mulr(f, T, T, I);
berg_addr(f, T, T, J);
berg_lshi(f, T, T, 2);
/* S += C[I][J] = I */
berg_ldxr_i32(f, T, C, T);
berg_addr(f, S, S, T);
berg_addi(f, J, J, 1);
berg_patch(f, berg_jmp(f), inner);
berg_patch(f, inner_jmp, berg_label(f));
berg_addi(f, I, I, 1);
berg_patch(f, berg_jmp(f), outer);
berg_patch(f, outer_jmp, berg_label(f));
/* print out 'hash' of matrix */
berg_movr(f, A0, S);
berg_ecall(f, T, BERG_PUTI32);
berg_ret(f);
compile_berg_func(f);
return f;
}
static struct berg_func *compile_main(struct berg_vm *vm, struct berg_func *init, struct berg_func *mult, struct berg_func *dump)
{
struct berg_gpr T = berg_gpr_tmp(0);
struct berg_gpr A = berg_gpr_tmp(1);
struct berg_gpr B = berg_gpr_tmp(2);
struct berg_gpr C = berg_gpr_tmp(3);
struct berg_func *f = create_berg_func(vm, BERG_VOID, 0, NULL);
struct berg_gpr A0 = berg_gpr_arg(0);
struct berg_gpr A1 = berg_gpr_arg(1);
struct berg_gpr A2 = berg_gpr_arg(2);
/* alloc matrixes */
berg_movi(f, A0, MATRIX_SIZE * MATRIX_SIZE * sizeof(int));
/* ecall takes some fixed registers, 0-1 (at least for now, will have to
* think of a proper ABI at some point) */
berg_ecall(f, A, BERG_MALLOC);
berg_ecall(f, B, BERG_MALLOC);
berg_ecall(f, C, BERG_MALLOC);
/** @todo come up with ABI for calls */
berg_movr(f, A0, A);
berg_movr(f, A1, B);
berg_call(f, init);
berg_movr(f, A2, C);
berg_call(f, mult);
berg_movr(f, A0, C);
berg_call(f, dump);
/* we don't really do anything with the return value so just dump it
* into T (should I have some kind of X0 register like in riscv?) */
berg_movr(f, A0, A);
berg_ecall(f, T, BERG_FREE);
berg_movr(f, A0, B);
berg_ecall(f, T, BERG_FREE);
berg_movr(f, A0, C);
berg_ecall(f, T, BERG_FREE);
berg_ret(f);
compile_berg_func(f);
return f;
}
int main(int argc, char *argv[argc])
{
struct berg_vm *vm = create_berg_vm();
struct berg_func *init = compile_init(vm);
struct berg_func *mult = compile_mult(vm);
struct berg_func *dump = compile_dump(vm);
struct berg_func *mn = compile_main(vm, init, mult, dump);
run_berg_func(mn);
destroy_berg_vm(vm);
return 0;
}
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