simgen-vla 6.2.4

GPU exact arithmetic - 512-bit precision, zero accumulation error

SimGen VLA - Zero-Error GPU Arithmetic

Drop-in PyTorch replacement with exact arithmetic. 512-bit precision (configurable to 16,384-bit). No accumulation error. Ever.

License Required - Internal demonstration only. Contact [e-mail] for licensing.

Support development: ko-fi.com/kyleclouthier

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The Problem: Floating-Point Lies

Every GPU computation accumulates tiny errors. These errors compound silently until your results are wrong.

import torch

# Classic floating-point failure
x = torch.tensor([1e16, 1.0, -1e16])
print(x.sum())  # 0.0  <- WRONG! Should be 1.0

# 10 million additions - error explodes
values = torch.ones(10_000_000) * 0.1
print(values.sum())  # 999999.9880... <- Should be 1000000.0

This affects: financial calculations, scientific simulations, physics engines, signal processing, cryptography, and any computation requiring precision.

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The Solution: SimGen VLA

from simgen import vla

# Exact arithmetic - mathematically correct
x = vla.tensor([1e16, 1.0, -1e16])
print(x.sum())  # 1.0  <- CORRECT!

# 10 million additions - still exact
values = vla.ones(10_000_000) * 0.1
print(values.sum())  # 1000000.0  <- EXACTLY correct

No code changes. Same PyTorch API. Just import vla instead of torch.

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Installation

pip install simgen-vla

Requirements:

• Python 3.10, 3.11, or 3.12
• PyTorch 2.0+ with CUDA
• CuPy (matching your CUDA version: pip install cupy-cuda11x or cupy-cuda12x)
• NVIDIA GPU (Pascal through Hopper: sm_60 to sm_90)

Platforms: Windows, Linux

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What's New in v6.2

• Cross-GPU Reproducibility: manual_seed() produces bit-identical results across ALL GPU architectures (RTX, Tesla, Ampere, etc.)
• Deterministic Random: randn() and rand() use numpy-based RNG for cross-platform consistency
• 94 GPU Operations: Complete arithmetic, linear algebra, and activation suite
• 512-bit Precision: 8-limb fixed-point architecture (configurable up to 16,384 bits)
• Custom CUDA Kernels: Every operation has a dedicated kernel - no library dependencies

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Proprietary Technology

SimGen VLA is deep tech. This is not a wrapper around existing libraries.

• Novel Algorithms: Proprietary error-free arithmetic developed from first principles
• 94 Custom CUDA Kernels: Each operation (sum, matmul, exp, softmax, etc.) has its own handwritten kernel
• Multi-Limb Architecture: Extends precision beyond hardware limits using proprietary accumulation methods
• Precompiled Binaries: Optimized for 6 GPU architectures (sm_60 through sm_90)

No other library provides true zero-error GPU arithmetic at this scale.

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Why This Matters

Standard FP64 arithmetic accumulates errors silently. VLA eliminates this entirely.

Domain	Problem	VLA Solution
Financial	Rounding errors compound across transactions	Exact to the penny
Scientific Simulation	Results drift over long runs	Deterministic, reversible
Quantum Computing	Unitarity degrades with operations	Preserved exactly
ML Training	Gradient accumulation noise	Clean gradients

Proven: Lorenz attractor forward/backward 10,000 steps returns to initial state exactly. Standard FP64 diverges completely.

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Use Cases

Financial Computing

Mixed-magnitude calculations where every cent matters:

from simgen import vla

# Portfolio with massive range - standard FP loses the pennies
positions = vla.tensor([
    1_000_000_000.00,   # $1 billion position
    0.01,                # 1 cent transaction fee
    -999_999_999.99,     # Large short position
    50_000.50,           # Medium holding
])

total = positions.sum()
print(f"Portfolio: ${float(total):,.2f}")  # $50,000.52 - exact!

Scientific Simulation

Physics simulations that don't drift over time:

from simgen import vla

# Chaotic system (Lorenz attractor)
def lorenz_step(state, dt=0.01):
    x, y, z = state[0], state[1], state[2]
    sigma, rho, beta = 10.0, 28.0, 8.0/3.0

    dx = sigma * (y - x)
    dy = x * (rho - z) - y
    dz = x * y - beta * z

    return vla.tensor([x + dx * dt, y + dy * dt, z + dz * dt])

# Run forward then backward - returns to EXACTLY initial state
state = vla.tensor([1.0, 1.0, 1.0])
initial = state.clone()

for _ in range(10000):
    state = lorenz_step(state, dt=0.01)
for _ in range(10000):
    state = lorenz_step(state, dt=-0.01)

error = (state - initial).abs().sum()
print(f"Reversal error: {float(error)}")  # 0.0 with VLA!

Linear Algebra

Exact matrix decompositions and solvers:

from simgen import vla

# Matrix operations
A = vla.randn((100, 100))
B = vla.randn((100, 100))
C = vla.matmul(A, B)  # Exact matrix multiply

# LU Decomposition
L, U = vla.lu(A)

# QR Decomposition
Q, R = vla.qr(A)

# Eigenvalues (power iteration)
eigenvalue, eigenvector = vla.eig(A)

# Matrix inverse and determinant
A_inv = vla.inv(A)
det = vla.det(A)

# Solve linear system: Ax = b
x = vla.solve(A, b)

Signal Processing

FFT and convolutions with exact arithmetic:

from simgen import vla

# 2D Convolution
signal = vla.randn((1, 3, 64, 64))
kernel = vla.randn((16, 3, 3, 3))
output = vla.conv2d(signal, kernel)

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Complete API Reference

Tensor Creation

from simgen import vla

x = vla.tensor([1.0, 2.0, 3.0])       # From list
z = vla.zeros((3, 3))                  # Zeros
o = vla.ones((100,))                   # Ones
r = vla.randn((10, 10))                # Random normal
u = vla.rand((5, 5))                   # Random uniform [0,1]
a = vla.arange(0, 10)                  # Range [0,1,2,...,9]
l = vla.linspace(0, 1, 100)            # 100 points from 0 to 1
I = vla.eye(5)                         # 5x5 identity matrix

# Cross-GPU reproducibility
vla.manual_seed(42)                    # Set seed for deterministic results
r = vla.randn((1024, 1024))            # Same result on ANY GPU

Arithmetic Operations

c = a + b          # Exact addition
c = a - b          # Exact subtraction
c = a * b          # Exact multiplication
c = a / b          # Exact division
c = -a             # Negation
c = a ** 2         # Power

Reductions (Zero Drift)

total = vla.sum(x)         # Exact sum
avg = vla.mean(x)          # Exact mean
product = vla.prod(x)      # Exact product
minimum = vla.min(x)       # Minimum
maximum = vla.max(x)       # Maximum
std_dev = vla.std(x)       # Standard deviation
variance = vla.var(x)      # Variance

Linear Algebra

C = vla.matmul(A, B)       # Matrix multiplication
C = vla.mm(A, B)           # Matrix-matrix multiply
y = vla.mv(A, x)           # Matrix-vector multiply
d = vla.dot(a, b)          # Dot product
C = vla.bmm(A, B)          # Batched matrix multiply
L, U = vla.lu(A)           # LU decomposition
Q, R = vla.qr(A)           # QR decomposition
e, v = vla.eig(A)          # Eigenvalue (power iteration)
det = vla.det(A)           # Determinant
inv = vla.inv(A)           # Matrix inverse
x = vla.solve(A, b)        # Solve Ax = b

Math Functions

y = vla.exp(x)             # Exponential
y = vla.log(x)             # Natural log
y = vla.sqrt(x)            # Square root
y = vla.abs(x)             # Absolute value
y = vla.sin(x)             # Sine
y = vla.cos(x)             # Cosine
y = vla.tan(x)             # Tangent
y = vla.tanh(x)            # Hyperbolic tangent
y = vla.sigmoid(x)         # Sigmoid

Activations

y = vla.relu(x)            # ReLU
y = vla.gelu(x)            # GELU
y = vla.silu(x)            # SiLU/Swish
y = vla.softmax(x)         # Softmax

Shape Operations

y = vla.reshape(x, (2, 3))       # Reshape
y = vla.transpose(x, 0, 1)       # Transpose dims
y = vla.squeeze(x)               # Remove size-1 dims
y = vla.unsqueeze(x, 0)          # Add dimension
y = vla.stack([a, b, c])         # Stack tensors
y = vla.cat([a, b])              # Concatenate

Exact Output

# Get TRUE exact value as Python Decimal
result = x.sum()
exact_value = result.to_decimal()  # Decimal('1.0') - mathematically exact

# SHA256 checksum for verification
hash_val = result.checksum()       # Verify across systems

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Supported GPUs

Architecture	Example GPUs	Compute Capability
Pascal	GTX 1080, P100, P40	sm_60, sm_61
Volta	V100, Titan V	sm_70
Turing	RTX 2080, T4, Quadro RTX	sm_75
Ampere	RTX 3090, A100, A10	sm_80, sm_86
Ada Lovelace	RTX 4090, 4080, 4070, L40	sm_89
Hopper	H100, H200	sm_90

Cloud Support: AWS (P3, P4, G4, G5), GCP (T4, A100, L4), Azure (NC, ND series), Kaggle (T4 x2 free), Colab

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Benchmarks

Operation	Elements	PyTorch Error	VLA Error
Sum	10M	10^-7 relative	0.0
Dot Product	1M	10^-8 relative	0.0
Matrix Multiply	1000x1000	10^-6 relative	0.0
Chained Ops	1000 iterations	Diverges	Exact

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FAQ

Q: Is this slower than PyTorch? A: Slightly. The overhead is typically 2-5x, which is negligible for applications where correctness matters.

Q: What about CPU? A: GPU required. VLA's exact arithmetic relies on native CUDA kernels - no CPU support.

Q: Can I verify results across systems? A: Yes! Use to_decimal() for exact values or checksum() for verification.

Q: Are random numbers reproducible across different GPUs? A: Yes! Use vla.manual_seed(42) before generating random tensors. The same seed produces bit-identical results on RTX 4070, Tesla T4, A100, H100 - any GPU architecture.

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Support & Contact

Website: simgen.dev

Support Development: ko-fi.com/kyleclouthier

Email: [e-mail]

GitHub: github.com/DigitalMax321/simgen

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License

Proprietary. License required for all use. Contact [e-mail] for licensing.

(c) 2025-2026 Clouthier Simulation Labs. All rights reserved.