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@@ -21,6 +21,10 @@ This section is primarily a series of useful links found online
 * [3.0 PDF](https://openpowerfoundation.org/?resource_lib=power-isa-version-3-0)
 * [2.07 PDF](https://openpowerfoundation.org/?resource_lib=ibm-power-isa-version-2-07-b)
 
+## Overview of the user ISA:
+
+(https://devblogs.microsoft.com/oldnewthing/20180806-00/?p=99425)
+
 # RISC-V Instruction Set Architecture
 
 **PLEASE UPDATE** - we are no longer implementing full RISCV, only user-space
@@ -54,6 +58,13 @@ for comparative/informative purposes with regard to Simple-V.
 * [Fast Floating Point Square Root](https://pdfs.semanticscholar.org/5060/4e9aff0e37089c4ab9a376c3f35761ffe28b.pdf)
 * [Reciprocal Square Root Algorithm](http://www.acsel-lab.com/arithmetic/arith15/papers/ARITH15_Takagi.pdf)
 
+## CORDIC and related algorithms
+* [BKM (log(x) and e^x)](https://en.wikipedia.org/wiki/BKM_algorithm)
+* [CORDIC](http://www.andraka.com/files/crdcsrvy.pdf)
+ - Does not have an easy way of computing tan(x)
+* [zipcpu CORDIC](https://zipcpu.com/dsp/2017/08/30/cordic.html)
+* [Low latency and Low error floating point TCORDIC](https://ieeexplore.ieee.org/document/7784797) (email Michael or Cole if you don't have IEEE access)
+
 ## IEEE Standard for Floating-Point Arithmetic (IEEE 754)
 
 Almost all modern computers follow the IEEE Floating-Point Standard. Of
@@ -66,6 +77,12 @@ it is unfortunately not freely available and requires a payment to
 access. However, each of the Libre RISC-V members already have access
 to the document.
 
+## Past FPU Mistakes to learn from
+
+* [Intel Underestimates Error Bounds by 1.3 quintillion on 
+Random ASCII – tech blog of Bruce Dawson ](https://randomascii.wordpress.com/2014/10/09/intel-underestimates-error-bounds-by-1-3-quintillion/)
+* [Intel overstates FPU accuracy 06/01/2013](http://notabs.org/fpuaccuracy)
+
 # Khronos Standards
 
 The Khronos Group creates open standards for authoring and acceleration