diff --git a/evm/src/cpu/kernel/asm/fields/Fp12.asm b/evm/src/cpu/kernel/asm/fields/Fp12.asm
index 19a9a5d2..c2173b55 100644
--- a/evm/src/cpu/kernel/asm/fields/Fp12.asm
+++ b/evm/src/cpu/kernel/asm/fields/Fp12.asm
@@ -1,14 +1,3 @@
-/// F = f + f'z
-/// G = g + g'z
-///
-/// h + h'z = FG 
-///
-/// h  = fg + sh(f'g')
-/// h' = (f+f')(g+g') - fg - f'g'
-///
-/// Note: each symbol in the stack comments consists of six words
-
-
 global test_mul_Fp12:
     // stack: f, f', g, g'
     %store_fp6(0)
@@ -26,6 +15,31 @@ return_on_stack:
     %jump(0xdeadbeef)
 
 
+///  macro | num | ops | cost
+///  -------------------------
+///  load  | 8   |  40 |  320
+///  store | 5   |  40 |  200
+///  dup   | 5   |   6 |   30
+///  swap  | 4   |  16 |   64
+///  add   | 3   |  16 |   48
+///  sub   | 2   |  17 |   34
+///  mul   | 3   | 156 |  468
+///  i9    | 1   |   9 |    9
+///  jump  | 1   |   1 |    1
+///
+/// TOTAL: 1174
+
+
+/// F = f + f'z
+/// G = g + g'z
+///
+/// H = h + h'z = FG 
+///
+/// h  = fg + sh(f'g')
+/// h' = (f+f')(g+g') - fg - f'g'
+///
+/// Note: each symbol in the stack comments consists of six words
+
 global mul_Fp12:
     %load_fp6(6)
     %load_fp6(18)
diff --git a/evm/src/cpu/kernel/asm/fields/Fp6.asm b/evm/src/cpu/kernel/asm/fields/Fp6.asm
index b39a8c24..739445e5 100644
--- a/evm/src/cpu/kernel/asm/fields/Fp6.asm
+++ b/evm/src/cpu/kernel/asm/fields/Fp6.asm
@@ -54,7 +54,7 @@
     // stack:
 %endmacro
 
-// cost: 49
+// cost: store (40) + i9 (9) = 49
 %macro store_fp6_sh(offset)
     // stack: x0, x1, x2, x3, x4, x5
     PUSH $offset