Add .syntax divided markers
Old GCC (pre-5?) natively use divided syntax, so we must put it back
after changing it.
More recent GCCs natively use unified syntax, and themselves are
surrounding our blocks with divided/unified directives for backwards
compatibility, so we don't need to restore for those.
Signed-off-by: Kevin Bracey <kevin.bracey@arm.com>
diff --git a/tinycrypt/ecc.c b/tinycrypt/ecc.c
index d48c3ee..cfc527b 100644
--- a/tinycrypt/ecc.c
+++ b/tinycrypt/ecc.c
@@ -252,6 +252,7 @@
"STMIA r0!,{r1,r2} \n\t"
"STMIA r0!,{r1,r2} \n\t"
"STMIA r0!,{r1,r2} \n\t"
+ ".syntax divided \n\t"
: "+r" (r0)
: "r" (r1), "r" (r2)
: "memory"
@@ -347,6 +348,7 @@
"RSBS %[r1],%[r1],#0 \n\t" // C set if zero
"MOVS %[ret],#0 \n\t"
"ADCS %[ret],r0 \n\t"
+ ".syntax divided \n\t"
: [ret]"=r" (ret), [r1]"=r" (r1), [r2]"=r" (r2), [r3]"=r" (r3)
: [vli]"[ret]" (vli)
: "cc", "memory"
@@ -588,6 +590,7 @@
"STMIA r0!,{r3,r4} \n\t"
"SBCS r0,r0 \n\t" // r0 := r0 - r0 - borrow = -borrow
"RSBS r0,r0,#0 \n\t" // r0 := borrow
+ ".syntax divided \n\t"
: "+r" (r0), "+r" (r1), "+r" (r2)
:
: "r3", "r4", "r5", "r6", "cc", "memory"
@@ -722,6 +725,7 @@
"STMIA r0!,{r3,r4} \n\t"
"MOVS r0,#0 \n\t" // does not affect C flag
"ADCS r0,r0 \n\t" // r0 := 0 + 0 + C = carry
+ ".syntax divided \n\t"
: "+r" (r0), "+r" (r1), "+r" (r2)
:
: "r3", "r4", "r5", "r6", "cc", "memory"
@@ -951,6 +955,7 @@
"ADCS r5,r0 \n\t"
"SUBS r2,#12 \n\t"
"STMIA r2!,{r3,r4,r5} \n\t"
+ ".syntax divided \n\t"
: "+r" (r0), "+r" (r1), "+r" (r2)
:
: "r3", "r4", "r5", "ip", "cc", "memory"