X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=avr-asm-macros.S;fp=avr-asm-macros.S;h=4991ceea0ec1a5fa39353305dafb9b52d8abcc41;hb=a397db40b94b01a3ed72f9367961cf68d82593d1;hp=f878be85914f0fa6483195fd68aaa68a3b905029;hpb=e9d9457ed0ea1d8027bc68c28db14bc4caed1f91;p=avr-crypto-lib.git

diff --git a/avr-asm-macros.S b/avr-asm-macros.S
index f878be8..4991cee 100644
--- a/avr-asm-macros.S
+++ b/avr-asm-macros.S
@@ -82,6 +82,33 @@
 	out _SFR_IO_ADDR(SPL), \reg1
 .endm
 
+
+.macro stack_alloc_large size:req, reg1=r30, reg2=r31
+	in r0, _SFR_IO_ADDR(SREG)
+	in \reg1, _SFR_IO_ADDR(SPL)
+	in \reg2, _SFR_IO_ADDR(SPH)
+	subi \reg1, lo8(\size)
+	sbci \reg2, hi8(\size)	 
+	cli
+	out _SFR_IO_ADDR(SPH), \reg2
+	out _SFR_IO_ADDR(SREG), r0
+	out _SFR_IO_ADDR(SPL), \reg1
+.endm
+
+.macro stack_free_large size:req, reg1=r30, reg2=r31
+	in r0, _SFR_IO_ADDR(SREG)
+	in \reg1, _SFR_IO_ADDR(SPL)
+	in \reg2, _SFR_IO_ADDR(SPH)
+	adiw \reg1, 63
+	adiw \reg1, (\size-63) 
+	cli
+	out _SFR_IO_ADDR(SPH), \reg2
+	out _SFR_IO_ADDR(SREG), r0
+	out _SFR_IO_ADDR(SPL), \reg1
+.endm
+
+
+
 /*******************************************************************************
 * END of MACRO SECTION                                                         *
 *******************************************************************************/