From 2763dc8b53f52cf85b01756ea713265e1185bdce Mon Sep 17 00:00:00 2001 From: Francis Couture-Harpin Date: Wed, 6 Aug 2025 16:26:25 -0400 Subject: [PATCH] ggml-quants : handle zero amax for MXFP4 --- ggml/src/ggml-quants.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/ggml/src/ggml-quants.c b/ggml/src/ggml-quants.c index a57d2a16d6..94f6405ca1 100644 --- a/ggml/src/ggml-quants.c +++ b/ggml/src/ggml-quants.c @@ -288,7 +288,7 @@ void quantize_row_mxfp4_ref(const float * GGML_RESTRICT x, block_mxfp4 * GGML_RE } } - const uint8_t e = (uint8_t) (floorf(log2f(amax)) - 2 + 127); + const uint8_t e = amax > 0.0f ? (uint8_t) (floorf(log2f(amax)) - 2 + 127) : 0; const float d = GGML_E8M0_TO_FP32_HALF(e);