elf.h: Use __ARM_ARCH_ISA_THUMB and __ARM_ARCH_ISA_ARM to decide whether to prevent...

2016-07-07  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * config/arm/elf.h: Use __ARM_ARCH_ISA_THUMB and __ARM_ARCH_ISA_ARM to
    decide whether to prevent some libgcc routines being included for some
    multilibs rather than __ARM_ARCH_6M__ and add comment to indicate the
    link between this condition and the one in
    libgcc/config/arm/lib1func.S.

    gcc/testsuite/
    * lib/target-supports.exp (check_effective_target_arm_cortex_m): Use
    __ARM_ARCH_ISA_ARM to test for Cortex-M devices.

    libgcc/
    * config/arm/bpabi-v6m.S: Clarify what architectures is the
    implementation suitable for.
    * config/arm/lib1funcs.S (__prefer_thumb__): Define among other cases
    for all Thumb-1 only targets.
    (NOT_ISA_TARGET_32BIT): Define for Thumb-1 only targets.
    (THUMB_LDIV0): Test for NOT_ISA_TARGET_32BIT rather than
    __ARM_ARCH_6M__.
    (EQUIV): Likewise.
    (ARM_FUNC_ALIAS): Likewise.
    (umodsi3): Add check to __ARM_ARCH_ISA_THUMB != 1 to guard the idiv
    version.
    (modsi3): Likewise.
    (clzsi2): Test for NOT_ISA_TARGET_32BIT rather than __ARM_ARCH_6M__.
    (clzdi2): Likewise.
    (ctzsi2): Likewise.
    (L_interwork_call_via_rX): Test for __ARM_ARCH_ISA_ARM rather than
    __ARM_ARCH_6M__ in guard for checking whether it is defined.
    (final includes): Test for NOT_ISA_TARGET_32BIT rather than
    __ARM_ARCH_6M__ and add comment to indicate the connection between
    this condition and the one in gcc/config/arm/elf.h.
    * config/arm/libunwind.S: Test for __ARM_ARCH_ISA_THUMB and
    __ARM_ARCH_ISA_ARM rather than __ARM_ARCH_6M__.
    * config/arm/t-softfp: Likewise.

From-SVN: r238079

5 files changed, 51 insertions, 19 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index ca00033..5f44923 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,29 @@
+2016-07-07  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	* config/arm/bpabi-v6m.S: Clarify what architectures is the
+	implementation suitable for.
+	* config/arm/lib1funcs.S (__prefer_thumb__): Define among other cases
+	for all Thumb-1 only targets.
+	(NOT_ISA_TARGET_32BIT): Define for Thumb-1 only targets.
+	(THUMB_LDIV0): Test for NOT_ISA_TARGET_32BIT rather than
+	__ARM_ARCH_6M__.
+	(EQUIV): Likewise.
+	(ARM_FUNC_ALIAS): Likewise.
+	(umodsi3): Add check to __ARM_ARCH_ISA_THUMB != 1 to guard the idiv
+	version.
+	(modsi3): Likewise.
+	(clzsi2): Test for NOT_ISA_TARGET_32BIT rather than __ARM_ARCH_6M__.
+	(clzdi2): Likewise.
+	(ctzsi2): Likewise.
+	(L_interwork_call_via_rX): Test for __ARM_ARCH_ISA_ARM rather than
+	__ARM_ARCH_6M__ in guard for checking whether it is defined.
+	(final includes): Test for NOT_ISA_TARGET_32BIT rather than
+	__ARM_ARCH_6M__ and add comment to indicate the connection between
+	this condition and the one in gcc/config/arm/elf.h.
+	* config/arm/libunwind.S: Test for __ARM_ARCH_ISA_THUMB and
+	__ARM_ARCH_ISA_ARM rather than __ARM_ARCH_6M__.
+	* config/arm/t-softfp: Likewise.
+
 2016-07-06  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
 
 	* libgcc2.c (SYMBOL__MAIN): Remove checks for
diff --git a/libgcc/config/arm/bpabi-v6m.S b/libgcc/config/arm/bpabi-v6m.S
index 5d35aa6..27f33a4 100644
--- a/libgcc/config/arm/bpabi-v6m.S
+++ b/libgcc/config/arm/bpabi-v6m.S
@@ -1,4 +1,5 @@
-/* Miscellaneous BPABI functions.  ARMv6M implementation
+/* Miscellaneous BPABI functions.  Thumb-1 implementation, suitable for ARMv4T,
+   ARMv6-M and ARMv8-M Baseline like ISA variants.
 
    Copyright (C) 2006-2016 Free Software Foundation, Inc.
    Contributed by CodeSourcery.
diff --git a/libgcc/config/arm/lib1funcs.S b/libgcc/config/arm/lib1funcs.S
index 375a513..951dcda 100644
--- a/libgcc/config/arm/lib1funcs.S
+++ b/libgcc/config/arm/lib1funcs.S
@@ -124,10 +124,14 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      && !defined(__thumb2__)		\
      && (!defined(__THUMB_INTERWORK__)	\
 	 || defined (__OPTIMIZE_SIZE__)	\
-	 || defined(__ARM_ARCH_6M__)))
+	 || !__ARM_ARCH_ISA_ARM))
 # define __prefer_thumb__
 #endif
 
+#if !__ARM_ARCH_ISA_ARM && __ARM_ARCH_ISA_THUMB == 1
+#define NOT_ISA_TARGET_32BIT 1
+#endif
+
 /* How to return from a function call depends on the architecture variant.  */
 
 #if (__ARM_ARCH__ > 4) || defined(__ARM_ARCH_4T__)
@@ -305,7 +309,7 @@ LSYM(Lend_fde):
 
 #ifdef __ARM_EABI__
 .macro THUMB_LDIV0 name signed
-#if defined(__ARM_ARCH_6M__)
+#ifdef NOT_ISA_TARGET_32BIT
 	.ifc \signed, unsigned
 	cmp	r0, #0
 	beq	1f
@@ -478,7 +482,7 @@ _L__\name:
 
 #else /* !(__INTERWORKING_STUBS__ || __thumb2__) */
 
-#ifdef __ARM_ARCH_6M__
+#ifdef NOT_ISA_TARGET_32BIT
 #define EQUIV .thumb_set
 #else
 .macro	ARM_FUNC_START name sp_section=
@@ -510,7 +514,7 @@ SYM (__\name):
 #endif
 .endm
 
-#ifndef __ARM_ARCH_6M__
+#ifndef NOT_ISA_TARGET_32BIT
 .macro	ARM_FUNC_ALIAS new old
 	.globl	SYM (__\new)
 	EQUIV	SYM (__\new), SYM (__\old)
@@ -1054,7 +1058,7 @@ ARM_FUNC_START aeabi_uidivmod
 /* ------------------------------------------------------------------------ */
 #ifdef L_umodsi3
 
-#ifdef __ARM_ARCH_EXT_IDIV__
+#if defined(__ARM_ARCH_EXT_IDIV__) && __ARM_ARCH_ISA_THUMB != 1
 
 	ARM_FUNC_START umodsi3
 
@@ -1240,7 +1244,7 @@ ARM_FUNC_START aeabi_idivmod
 /* ------------------------------------------------------------------------ */
 #ifdef L_modsi3
 
-#if defined(__ARM_ARCH_EXT_IDIV__)
+#if defined(__ARM_ARCH_EXT_IDIV__) && __ARM_ARCH_ISA_THUMB != 1
 
 	ARM_FUNC_START modsi3
 
@@ -1515,7 +1519,7 @@ LSYM(Lover12):
 #endif
 
 #ifdef L_clzsi2
-#if defined(__ARM_ARCH_6M__)
+#ifdef NOT_ISA_TARGET_32BIT
 FUNC_START clzsi2
 	mov	r1, #28
 	mov	r3, #1
@@ -1576,7 +1580,7 @@ ARM_FUNC_START clzsi2
 #ifdef L_clzdi2
 #if !defined(HAVE_ARM_CLZ)
 
-# if defined(__ARM_ARCH_6M__)
+# ifdef NOT_ISA_TARGET_32BIT
 FUNC_START clzdi2
 	push	{r4, lr}
 # else
@@ -1601,7 +1605,7 @@ ARM_FUNC_START clzdi2
 	bl	__clzsi2
 # endif
 2:
-# if defined(__ARM_ARCH_6M__)
+# ifdef NOT_ISA_TARGET_32BIT
 	pop	{r4, pc}
 # else
 	RETLDM	r4
@@ -1623,7 +1627,7 @@ ARM_FUNC_START clzdi2
 #endif /* L_clzdi2 */
 
 #ifdef L_ctzsi2
-#if defined(__ARM_ARCH_6M__)
+#ifdef NOT_ISA_TARGET_32BIT
 FUNC_START ctzsi2
 	neg	r1, r0
 	and	r0, r0, r1
@@ -1738,7 +1742,7 @@ ARM_FUNC_START ctzsi2
 
 /* Don't bother with the old interworking routines for Thumb-2.  */
 /* ??? Maybe only omit these on "m" variants.  */
-#if !defined(__thumb2__) && !defined(__ARM_ARCH_6M__)
+#if !defined(__thumb2__) && __ARM_ARCH_ISA_ARM
 
 #if defined L_interwork_call_via_rX
 
@@ -1983,11 +1987,12 @@ LSYM(Lchange_\register):
 .endm
 
 #ifndef __symbian__
-#ifndef __ARM_ARCH_6M__
+/* The condition here must match the one in gcc/config/arm/elf.h.  */
+#ifndef NOT_ISA_TARGET_32BIT
 #include "ieee754-df.S"
 #include "ieee754-sf.S"
 #include "bpabi.S"
-#else /* __ARM_ARCH_6M__ */
+#else /* NOT_ISA_TARGET_32BIT */
 #include "bpabi-v6m.S"
-#endif /* __ARM_ARCH_6M__ */
+#endif /* NOT_ISA_TARGET_32BIT */
 #endif /* !__symbian__ */
diff --git a/libgcc/config/arm/libunwind.S b/libgcc/config/arm/libunwind.S
index a68b10d..3d7e701 100644
--- a/libgcc/config/arm/libunwind.S
+++ b/libgcc/config/arm/libunwind.S
@@ -58,7 +58,7 @@
 #endif
 #endif
 
-#ifdef __ARM_ARCH_6M__
+#if !__ARM_ARCH_ISA_ARM && __ARM_ARCH_ISA_THUMB == 1
 
 /* r0 points to a 16-word block.  Upload these values to the actual core
    state.  */
@@ -169,7 +169,7 @@ FUNC_START gnu_Unwind_Save_WMMXC
 	UNPREFIX \name
 .endm
 
-#else /* !__ARM_ARCH_6M__ */
+#else /* __ARM_ARCH_ISA_ARM || __ARM_ARCH_ISA_THUMB != 1 */
 
 /* r0 points to a 16-word block.  Upload these values to the actual core
    state.  */
@@ -351,7 +351,7 @@ ARM_FUNC_START gnu_Unwind_Save_WMMXC
 	UNPREFIX \name
 .endm
 
-#endif /* !__ARM_ARCH_6M__ */
+#endif /* __ARM_ARCH_ISA_ARM || __ARM_ARCH_ISA_THUMB != 1 */
 
 UNWIND_WRAPPER _Unwind_RaiseException 1
 UNWIND_WRAPPER _Unwind_Resume 1
diff --git a/libgcc/config/arm/t-softfp b/libgcc/config/arm/t-softfp
index 4ede438..554ec9b 100644
--- a/libgcc/config/arm/t-softfp
+++ b/libgcc/config/arm/t-softfp
@@ -1,2 +1,2 @@
-softfp_wrap_start := '\#ifdef __ARM_ARCH_6M__'
+softfp_wrap_start := '\#if !__ARM_ARCH_ISA_ARM && __ARM_ARCH_ISA_THUMB == 1'
 softfp_wrap_end := '\#endif'