extend pair count to 2 for not using pippengers for g1 / g2 msm

Signed-off-by: garyschulte <garyschulte@gmail.com>
hyperledger · Dec 13, 2024 · c864355 · c864355
1 parent ee878ef
commit c864355
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP2537.java b/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP2537.java
@@ -64,7 +64,8 @@ public static int eip2537_perform_operation(
         o_len.setValue(128);
         break;
       case BLS12_G1MULTIEXP_OPERATION_SHIM_VALUE:
-        if (i.length <= 192) {
+        // for pair count <= 2, use straight add/mul loop:
+        if (i.length <= 192 * 2) {
          ret =  eip2537blsG1MultiExp(i, output, err, i_len,
              EIP2537_PREALLOCATE_FOR_RESULT_BYTES, EIP2537_PREALLOCATE_FOR_ERROR_BYTES);
         } else {
@@ -87,7 +88,8 @@ public static int eip2537_perform_operation(
         o_len.setValue(256);
         break;
       case BLS12_G2MULTIEXP_OPERATION_SHIM_VALUE:
-        if (i.length <= 288) {
+        // for pair count <= 2, use straight add/mul loop:
+        if (i.length <= 288 * 2) {
           ret =  eip2537blsG2MultiExp(i, output, err, i_len,
               EIP2537_PREALLOCATE_FOR_RESULT_BYTES,
               EIP2537_PREALLOCATE_FOR_ERROR_BYTES);