From 8e9642e9627dfa38b7c9620ed5df83cf958af0a4 Mon Sep 17 00:00:00 2001
From: Leonard Chan <leonardchan@google.com>
Date: Thu, 25 May 2023 23:24:34 +0000
Subject: [PATCH] Never inline uECC_vli_add/sub/clear.

Clang will unconditionally inline these large assembly functions at -Oz.
This should be addressed upstream, but in the meantime, we can save some
kilobytes by forcing them to never be inlined.
---
 asm_arm.inc | 2 ++
 uECC.c      | 1 +
 2 files changed, 3 insertions(+)

diff --git a/asm_arm.inc b/asm_arm.inc
index 12e747f..c5231aa 100644
--- a/asm_arm.inc
+++ b/asm_arm.inc
@@ -43,6 +43,7 @@
 
 #if (uECC_OPTIMIZATION_LEVEL >= 2)
 
+__attribute__((noinline))
 uECC_VLI_API uECC_word_t uECC_vli_add(uECC_word_t *result,
                                       const uECC_word_t *left,
                                       const uECC_word_t *right,
@@ -97,6 +98,7 @@ uECC_VLI_API uECC_word_t uECC_vli_add(uECC_word_t *result,
 }
 #define asm_add 1
 
+__attribute__((noinline))
 uECC_VLI_API uECC_word_t uECC_vli_sub(uECC_word_t *result,
                                       const uECC_word_t *left,
                                       const uECC_word_t *right,
diff --git a/uECC.c b/uECC.c
index a3d502c..862aa6d 100644
--- a/uECC.c
+++ b/uECC.c
@@ -209,6 +209,7 @@ int uECC_curve_public_key_size(uECC_Curve curve) {
 }
 
 #if !asm_clear
+__attribute__((noinline))
 uECC_VLI_API void uECC_vli_clear(uECC_word_t *vli, wordcount_t num_words) {
     wordcount_t i;
     for (i = 0; i < num_words; ++i) {