From 9e60ee25676e8e2dd0e9c45ecf7fda6b5cc49f3e Mon Sep 17 00:00:00 2001
From: Dmitry Vagner <dmitry.vagner@gmail.com>
Date: Mon, 13 Feb 2023 11:25:46 -0800
Subject: [PATCH] segment

---
 .../cpu/kernel/asm/curve/bn254/field_arithmetic/util.asm  | 8 ++++++++
 evm/src/memory/segments.rs                                | 6 +++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/evm/src/cpu/kernel/asm/curve/bn254/field_arithmetic/util.asm b/evm/src/cpu/kernel/asm/curve/bn254/field_arithmetic/util.asm
index 2543878c..e1f043f1 100644
--- a/evm/src/cpu/kernel/asm/curve/bn254/field_arithmetic/util.asm
+++ b/evm/src/cpu/kernel/asm/curve/bn254/field_arithmetic/util.asm
@@ -1,3 +1,11 @@
+// Load a single value from bn254 pairings memory.
+%macro mload_bn254_pairings
+    // stack: offset
+    %mload_kernel(@SEGMENT_BN254_PAIRINGS)
+    // stack: value
+%endmacro
+
+
 // fp254_2 macros
 
 %macro load_fp254_2
diff --git a/evm/src/memory/segments.rs b/evm/src/memory/segments.rs
index a632e40f..51c5f64d 100644
--- a/evm/src/memory/segments.rs
+++ b/evm/src/memory/segments.rs
@@ -40,10 +40,11 @@ pub(crate) enum Segment {
     ShiftTable = 16,
     JumpdestBits = 17,
     EcdsaTable = 18,
+    BN254Pairings = 19,
 }
 
 impl Segment {
-    pub(crate) const COUNT: usize = 19;
+    pub(crate) const COUNT: usize = 20;
 
     pub(crate) fn all() -> [Self; Self::COUNT] {
         [
@@ -66,6 +67,7 @@ impl Segment {
             Self::ShiftTable,
             Self::JumpdestBits,
             Self::EcdsaTable,
+            Self::BN254Pairings,
         ]
     }
 
@@ -91,6 +93,7 @@ impl Segment {
             Segment::ShiftTable => "SEGMENT_SHIFT_TABLE",
             Segment::JumpdestBits => "SEGMENT_JUMPDEST_BITS",
             Segment::EcdsaTable => "SEGMENT_KERNEL_ECDSA_TABLE",
+            Segment::BN254Pairings => "SEGMENT_BN254_PAIRINGS",
         }
     }
 
@@ -116,6 +119,7 @@ impl Segment {
             Segment::ShiftTable => 256,
             Segment::JumpdestBits => 1,
             Segment::EcdsaTable => 256,
+            Segment::BN254Pairings => 256,
         }
     }
 }