Merge pull request #8561 from SparkiDev/poly1305-arm32-asm-fix

Poly1305 ARM32 assembly code: loading with ldm

Author: douzzer

wolfcrypt/src/port/arm/armv8-32-poly1305-asm.S

@@ -815,7 +815,10 @@ L_poly1305_arm32_blocks_start_1:
 	mov	r12, #1
 	push	{r2}
 	# Load message
-	ldm	r1, {r2, r3, r4, r5}
+	ldr	r2, [r1]
+	ldr	r3, [r1, #4]
+	ldr	r4, [r1, #8]
+	ldr	r5, [r1, #12]
 	# Add message
 	adds	r7, r7, r2
 	adcs	r8, r8, r3

wolfcrypt/src/port/arm/armv8-32-poly1305-asm_c.c

@@ -870,7 +870,10 @@ void poly1305_arm32_blocks(Poly1305* ctx_p, const unsigned char* m_p,
         "mov	r12, #1\n\t"
         "push	{r2}\n\t"
         /* Load message */
-        "ldm	%[m], {r2, r3, r4, r5}\n\t"
+        "ldr	%[bytes], [%[m]]\n\t"
+        "ldr	r3, [%[m], #4]\n\t"
+        "ldr	r4, [%[m], #8]\n\t"
+        "ldr	r5, [%[m], #12]\n\t"
         /* Add message */
         "adds	r7, r7, %[bytes]\n\t"
         "adcs	r8, r8, r3\n\t"