From 772dc5c9e7711e6b033ff3801f9efaa952c9c79c Mon Sep 17 00:00:00 2001
From: Nicholas Ward <npward@berkeley.edu>
Date: Mon, 14 Nov 2022 16:48:33 -0800
Subject: [PATCH] util file

---
 evm/src/cpu/kernel/asm/hash/blake/util.asm | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 evm/src/cpu/kernel/asm/hash/blake/util.asm

diff --git a/evm/src/cpu/kernel/asm/hash/blake/util.asm b/evm/src/cpu/kernel/asm/hash/blake/util.asm
new file mode 100644
index 00000000..04e29ca9
--- /dev/null
+++ b/evm/src/cpu/kernel/asm/hash/blake/util.asm
@@ -0,0 +1,15 @@
+// Load a 64-bit word from kernel general memory.
+%macro mload_blake_word
+    // stack: offset
+    DUP1
+    %mload_kernel_general_u32
+    // stack: hi, offset
+    %shl_const(32)
+    // stack: hi << 32, offset
+    SWAP1
+    // stack: offset, hi << 32
+    %add_const(4)
+    %mload_kernel_general_u32
+    OR
+    // stack: (hi << 32) | lo
+%endmacro