X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=avr-asm-macros.S;fp=avr-asm-macros.S;h=829562b7d1b680241df3d8786e8f443ba3edbd4b;hb=c239a90de4f9ea98d7c0f5962d200c1a6a6033d1;hp=0fd325dfc168c6380fe941be23bb90b2971c1ecc;hpb=f215d8ed649fd5bf5f85eb34f851a1539302013d;p=avr-crypto-lib.git

diff --git a/avr-asm-macros.S b/avr-asm-macros.S
index 0fd325d..829562b 100644
--- a/avr-asm-macros.S
+++ b/avr-asm-macros.S
@@ -120,6 +120,24 @@
 	out _SFR_IO_ADDR(SPL), \reg1
 .endm
 
+.macro stack_free_large3 size:req, reg1=r30, reg2=r31
+	in r0, _SFR_IO_ADDR(SREG)
+	in \reg1, _SFR_IO_ADDR(SPL)
+	in \reg2, _SFR_IO_ADDR(SPH)
+	push r16
+	push r17
+	ldi r16, lo8(\size)
+	ldi r17, hi8(\size)
+	add \reg1, r16
+	adc \reg2, r17
+	pop r17
+	pop r16 
+	cli
+	out _SFR_IO_ADDR(SPH), \reg2
+	out _SFR_IO_ADDR(SREG), r0
+	out _SFR_IO_ADDR(SPL), \reg1
+.endm
+
 
 /*******************************************************************************
 * END of MACRO SECTION                                                         *