sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 102 insertions, 0 deletions

diff --git a/device/lib/_fscmp.c b/device/lib/_fscmp.c
new file mode 100644
index 0000000..6b44f28
--- /dev/null
+++ b/device/lib/_fscmp.c
@@ -0,0 +1,102 @@
+/*-------------------------------------------------------------------------
+   _fscmp.c - Floating point library in optimized assembly for 8051
+
+   Copyright (c) 2004, Paul Stoffregen, paul@pjrc.com
+
+   This library is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 2, or (at your option) any
+   later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License 
+   along with this library; see the file COPYING. If not, write to the
+   Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA.
+
+   As a special exception, if you link this library with other files,
+   some of which are compiled with SDCC, to produce an executable,
+   this library does not by itself cause the resulting executable to
+   be covered by the GNU General Public License. This exception does
+   not however invalidate any other reasons why the executable file
+   might be covered by the GNU General Public License.
+-------------------------------------------------------------------------*/
+
+
+#define __SDCC_FLOAT_LIB
+#include <float.h>
+
+
+#ifdef FLOAT_ASM_MCS51
+
+static void dummy(void) __naked
+{
+	__asm
+
+	.globl	fs_compare_uint32
+fs_compare_uint32:
+	mov	r1, #1
+	mov	r2, dpl
+	mov	a, @r0
+	mov	dpl, r7
+	cjne	a, dpl, compare32_done
+	dec	r0
+	mov	a, @r0
+	cjne	a, b, compare32_done
+	dec	r0
+	mov	a, @r0
+	cjne	a, dph, compare32_done
+	dec	r0
+	mov	a, @r0
+	mov	dpl, r2
+	cjne	a, dpl, compare32_done
+	mov	r1, #0
+compare32_done:
+	ret
+
+
+	.globl	fs_check_negative_zeros
+fs_check_negative_zeros:
+a_check:
+	cjne	a, #0x80, a_not_neg_zero
+	mov	a, b
+	jnz	a_not_neg_zero_cleanup
+	mov	a, dph
+	jnz	a_not_neg_zero_cleanup
+	mov	a, dpl
+	jnz	a_not_neg_zero_cleanup
+	mov	r7, #0
+a_not_neg_zero_cleanup:
+	mov	a, r7
+a_not_neg_zero:
+
+b_check:
+	cjne	@r0, #0x80, b_not_neg_zero
+	dec	r0
+	cjne	@r0, #0, b_not_neg_zero_cleanup_1
+	dec	r0
+	cjne	@r0, #0, b_not_neg_zero_cleanup_2
+	dec	r0
+	cjne	@r0, #0, b_not_neg_zero_cleanup_3
+	inc	r0
+	inc	r0
+	inc	r0
+	mov	@r0, #0
+	ret
+b_not_neg_zero_cleanup_3:
+	inc	r0
+b_not_neg_zero_cleanup_2:
+	inc	r0
+b_not_neg_zero_cleanup_1:
+	inc	r0
+b_not_neg_zero:
+	ret
+
+	__endasm;
+}
+
+#endif