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1 files changed, 318 insertions, 0 deletions

diff --git a/gcc/config/arm/bpabi-v6m.S b/gcc/config/arm/bpabi-v6m.S
new file mode 100644
index 000000000..4ecea6da5
--- /dev/null
+++ b/gcc/config/arm/bpabi-v6m.S
@@ -0,0 +1,318 @@
+/* Miscellaneous BPABI functions.  ARMv6M implementation
+
+   Copyright (C) 2006, 2008, 2009, 2010  Free Software Foundation, Inc.
+   Contributed by CodeSourcery.
+
+   This file 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 3, or (at your option) any
+   later version.
+
+   This file 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef __ARM_EABI__
+/* Some attributes that are common to all routines in this file.  */
+	/* Tag_ABI_align_needed: This code does not require 8-byte
+	   alignment from the caller.  */
+	/* .eabi_attribute 24, 0  -- default setting.  */
+	/* Tag_ABI_align_preserved: This code preserves 8-byte
+	   alignment in any callee.  */
+	.eabi_attribute 25, 1
+#endif /* __ARM_EABI__ */
+
+#ifdef L_aeabi_lcmp
+
+FUNC_START aeabi_lcmp
+	cmp	xxh, yyh
+	beq	1f
+	bgt	2f
+	mov	r0, #1
+	neg	r0, r0
+	RET
+2:
+	mov	r0, #1
+	RET
+1:
+	sub	r0, xxl, yyl
+	beq	1f
+	bhi	2f
+	mov	r0, #1
+	neg	r0, r0
+	RET
+2:
+	mov	r0, #1
+1:
+	RET
+	FUNC_END aeabi_lcmp
+
+#endif /* L_aeabi_lcmp */
+	
+#ifdef L_aeabi_ulcmp
+
+FUNC_START aeabi_ulcmp
+	cmp	xxh, yyh
+	bne	1f
+	sub	r0, xxl, yyl
+	beq	2f
+1:
+	bcs	1f
+	mov	r0, #1
+	neg	r0, r0
+	RET
+1:
+	mov	r0, #1
+2:
+	RET
+	FUNC_END aeabi_ulcmp
+
+#endif /* L_aeabi_ulcmp */
+
+.macro test_div_by_zero signed
+	cmp	yyh, #0
+	bne	7f
+	cmp	yyl, #0
+	bne	7f
+	cmp	xxh, #0
+	bne	2f
+	cmp	xxl, #0
+2:
+	.ifc	\signed, unsigned
+	beq	3f
+	mov	xxh, #0
+	mvn	xxh, xxh		@ 0xffffffff
+	mov	xxl, xxh
+3:
+	.else
+	beq	5f
+	blt	6f
+	mov	xxl, #0
+	mvn	xxl, xxl		@ 0xffffffff
+	lsr	xxh, xxl, #1		@ 0x7fffffff
+	b	5f
+6:	mov	xxh, #0x80
+	lsl	xxh, xxh, #24		@ 0x80000000
+	mov	xxl, #0
+5:
+	.endif
+	@ tailcalls are tricky on v6-m.
+	push	{r0, r1, r2}
+	ldr	r0, 1f
+	adr	r1, 1f
+	add	r0, r1
+	str	r0, [sp, #8]
+	@ We know we are not on armv4t, so pop pc is safe.
+	pop	{r0, r1, pc}
+	.align	2
+1:
+	.word	__aeabi_ldiv0 - 1b
+7:
+.endm
+
+#ifdef L_aeabi_ldivmod
+
+FUNC_START aeabi_ldivmod
+	test_div_by_zero signed
+
+	push {r0, r1}
+	mov r0, sp
+	push {r0, lr}
+	ldr r0, [sp, #8]
+	bl SYM(__gnu_ldivmod_helper)
+	ldr r3, [sp, #4]
+	mov lr, r3
+	add sp, sp, #8
+	pop {r2, r3}
+	RET
+	FUNC_END aeabi_ldivmod
+
+#endif /* L_aeabi_ldivmod */
+
+#ifdef L_aeabi_uldivmod
+
+FUNC_START aeabi_uldivmod
+	test_div_by_zero unsigned
+
+	push {r0, r1}
+	mov r0, sp
+	push {r0, lr}
+	ldr r0, [sp, #8]
+	bl SYM(__gnu_uldivmod_helper)
+	ldr r3, [sp, #4]
+	mov lr, r3
+	add sp, sp, #8
+	pop {r2, r3}
+	RET
+	FUNC_END aeabi_uldivmod
+	
+#endif /* L_aeabi_uldivmod */
+
+#ifdef L_arm_addsubsf3
+
+FUNC_START aeabi_frsub
+
+      push	{r4, lr}
+      mov	r4, #1
+      lsl	r4, #31
+      eor	r0, r0, r4
+      bl	__aeabi_fadd
+      pop	{r4, pc}
+
+      FUNC_END aeabi_frsub
+
+#endif /* L_arm_addsubsf3 */
+
+#ifdef L_arm_cmpsf2
+
+FUNC_START aeabi_cfrcmple
+
+	mov	ip, r0
+	mov	r0, r1
+	mov	r1, ip
+	b	6f
+
+FUNC_START aeabi_cfcmpeq
+FUNC_ALIAS aeabi_cfcmple aeabi_cfcmpeq
+
+	@ The status-returning routines are required to preserve all
+	@ registers except ip, lr, and cpsr.
+6:	push	{r0, r1, r2, r3, r4, lr}
+	bl	__lesf2
+	@ Set the Z flag correctly, and the C flag unconditionally.
+	cmp	r0, #0
+	@ Clear the C flag if the return value was -1, indicating
+	@ that the first operand was smaller than the second.
+	bmi 1f
+	mov	r1, #0
+	cmn	r0, r1
+1:
+	pop	{r0, r1, r2, r3, r4, pc}
+
+	FUNC_END aeabi_cfcmple
+	FUNC_END aeabi_cfcmpeq
+	FUNC_END aeabi_cfrcmple
+
+FUNC_START	aeabi_fcmpeq
+
+	push	{r4, lr}
+	bl	__eqsf2
+	neg	r0, r0
+	add	r0, r0, #1
+	pop	{r4, pc}
+
+	FUNC_END aeabi_fcmpeq
+
+.macro COMPARISON cond, helper, mode=sf2
+FUNC_START	aeabi_fcmp\cond
+
+	push	{r4, lr}
+	bl	__\helper\mode
+	cmp	r0, #0
+	b\cond	1f
+	mov	r0, #0
+	pop	{r4, pc}
+1:
+	mov	r0, #1
+	pop	{r4, pc}
+
+	FUNC_END aeabi_fcmp\cond
+.endm
+
+COMPARISON lt, le
+COMPARISON le, le
+COMPARISON gt, ge
+COMPARISON ge, ge
+
+#endif /* L_arm_cmpsf2 */
+
+#ifdef L_arm_addsubdf3
+
+FUNC_START aeabi_drsub
+
+      push	{r4, lr}
+      mov	r4, #1
+      lsl	r4, #31
+      eor	xxh, xxh, r4
+      bl	__aeabi_dadd
+      pop	{r4, pc}
+
+      FUNC_END aeabi_drsub
+
+#endif /* L_arm_addsubdf3 */
+
+#ifdef L_arm_cmpdf2
+
+FUNC_START aeabi_cdrcmple
+
+	mov	ip, r0
+	mov	r0, r2
+	mov	r2, ip
+	mov	ip, r1
+	mov	r1, r3
+	mov	r3, ip
+	b	6f
+
+FUNC_START aeabi_cdcmpeq
+FUNC_ALIAS aeabi_cdcmple aeabi_cdcmpeq
+
+	@ The status-returning routines are required to preserve all
+	@ registers except ip, lr, and cpsr.
+6:	push	{r0, r1, r2, r3, r4, lr}
+	bl	__ledf2
+	@ Set the Z flag correctly, and the C flag unconditionally.
+	cmp	r0, #0
+	@ Clear the C flag if the return value was -1, indicating
+	@ that the first operand was smaller than the second.
+	bmi 1f
+	mov	r1, #0
+	cmn	r0, r1
+1:
+	pop	{r0, r1, r2, r3, r4, pc}
+
+	FUNC_END aeabi_cdcmple
+	FUNC_END aeabi_cdcmpeq
+	FUNC_END aeabi_cdrcmple
+
+FUNC_START	aeabi_dcmpeq
+
+	push	{r4, lr}
+	bl	__eqdf2
+	neg	r0, r0
+	add	r0, r0, #1
+	pop	{r4, pc}
+
+	FUNC_END aeabi_dcmpeq
+
+.macro COMPARISON cond, helper, mode=df2
+FUNC_START	aeabi_dcmp\cond
+
+	push	{r4, lr}
+	bl	__\helper\mode
+	cmp	r0, #0
+	b\cond	1f
+	mov	r0, #0
+	pop	{r4, pc}
+1:
+	mov	r0, #1
+	pop	{r4, pc}
+
+	FUNC_END aeabi_dcmp\cond
+.endm
+
+COMPARISON lt, le
+COMPARISON le, le
+COMPARISON gt, ge
+COMPARISON ge, ge
+
+#endif /* L_arm_cmpdf2 */