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-rw-r--r--passes/pmgen/xilinx_dsp.cc3
1 files changed, 2 insertions, 1 deletions
diff --git a/passes/pmgen/xilinx_dsp.cc b/passes/pmgen/xilinx_dsp.cc
index adc09a6e4..abd145723 100644
--- a/passes/pmgen/xilinx_dsp.cc
+++ b/passes/pmgen/xilinx_dsp.cc
@@ -507,7 +507,8 @@ struct XilinxDspPass : public Pass {
log("\n");
log("Multiply-accumulate operations using the post-adder with feedback on the 'C'\n");
log("input will be folded into the DSP. In this scenario only, the 'C' input can be\n");
- log("used to override the existing accumulation result with a new value.\n");
+ log("used to override the current accumulation result with a new value, which will\n");
+ log("be added to the multiplier result to form the next accumulation result.\n");
log("\n");
log("Use of the dedicated 'PCOUT' -> 'PCIN' cascade path is detected for 'P' -> 'C'\n");
log("connections (optionally, where 'P' is right-shifted by 18-bits and used as an\n");