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metal : another fix for the fa kernel

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Georgi Gerganov 2024-08-26 14:55:28 +03:00
parent 7a3df798fc
commit a95225cdfd
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1 changed files with 13 additions and 11 deletions
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ggml/src/ggml-metal.metal
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@ -2144,19 +2144,21 @@ kernel void kernel_flash_attn_ext_f16(
const short tx = tiisg%4; const short tx = tiisg%4;
const short ty = tiisg/4; const short ty = tiisg/4;
// mqk = mqk*scale if (iq1 + ty < ne01) {
ss[8*cc + ty*TF + 2*tx + 0] *= scale; // mqk = mqk*scale
ss[8*cc + ty*TF + 2*tx + 1] *= scale; ss[8*cc + ty*TF + 2*tx + 0] *= scale;
ss[8*cc + ty*TF + 2*tx + 1] *= scale;
if (logit_softcap != 0.0f) { if (logit_softcap != 0.0f) {
ss[8*cc + ty*TF + 2*tx + 0] = logit_softcap*precise::tanh(ss[8*cc + ty*TF + 2*tx + 0]); ss[8*cc + ty*TF + 2*tx + 0] = logit_softcap*precise::tanh(ss[8*cc + ty*TF + 2*tx + 0]);
ss[8*cc + ty*TF + 2*tx + 1] = logit_softcap*precise::tanh(ss[8*cc + ty*TF + 2*tx + 1]); ss[8*cc + ty*TF + 2*tx + 1] = logit_softcap*precise::tanh(ss[8*cc + ty*TF + 2*tx + 1]);
} }
if (mask != q) { if (mask != q) {
// mqk = mqk + mask*slope // mqk = mqk + mask*slope
ss[8*cc + ty*TF + 2*tx + 0] += slope*mp[ic + 8*cc + ty*nb31/sizeof(half) + 2*tx + 0]; ss[8*cc + ty*TF + 2*tx + 0] += slope*mp[ic + 8*cc + ty*nb31/sizeof(half) + 2*tx + 0];
ss[8*cc + ty*TF + 2*tx + 1] += slope*mp[ic + 8*cc + ty*nb31/sizeof(half) + 2*tx + 1]; ss[8*cc + ty*TF + 2*tx + 1] += slope*mp[ic + 8*cc + ty*nb31/sizeof(half) + 2*tx + 1];
}
} }
} }
} }