X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=avr-asm-macros.S;h=829562b7d1b680241df3d8786e8f443ba3edbd4b;hb=01166b227940a23b4b666d2bda5964bfd2fbc9da;hp=f878be85914f0fa6483195fd68aaa68a3b905029;hpb=5ac75cfae217122b540c1a6d258054230dc534c3;p=avr-crypto-lib.git

diff --git a/avr-asm-macros.S b/avr-asm-macros.S
index f878be8..829562b 100644
--- a/avr-asm-macros.S
+++ b/avr-asm-macros.S
@@ -1,6 +1,6 @@
 /* avr-asm-macros.S */
 /*
-    This file is part of the Crypto-avr-lib/microcrypt-lib.
+    This file is part of the AVR-Crypto-Lib.
     Copyright (C) 2008  Daniel Otte (daniel.otte@rub.de)
 
     This program is free software: you can redistribute it and/or modify
@@ -82,6 +82,63 @@
 	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
+
+.macro stack_free_large2 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, 63
+	adiw \reg1, (\size-63*2) 
+	cli
+	out _SFR_IO_ADDR(SPH), \reg2
+	out _SFR_IO_ADDR(SREG), r0
+	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                                                         *
 *******************************************************************************/