[src/trunk]: src/sys/external/bsd/compiler_rt/dist/lib/builtins/arm Do previo...

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/16758c643949
branches:  trunk
changeset: 380016:16758c643949
user:      skrll <skrll%NetBSD.org@localhost>
date:      Wed Jun 30 21:18:00 2021 +0000

description:
Do previous differently by pushing even number of registers and remove
strange r7 usage.

diffstat:

 sys/external/bsd/compiler_rt/dist/lib/builtins/arm/aeabi_cfcmp.S |  16 +++------
 sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divmodsi4.S   |   7 +---
 sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divsi3.S      |   7 +---
 sys/external/bsd/compiler_rt/dist/lib/builtins/arm/modsi3.S      |   7 +---
 4 files changed, 12 insertions(+), 25 deletions(-)

diffs (103 lines):

diff -r e496d3df1493 -r 16758c643949 sys/external/bsd/compiler_rt/dist/lib/builtins/arm/aeabi_cfcmp.S
--- a/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/aeabi_cfcmp.S  Wed Jun 30 20:00:18 2021 +0000
+++ b/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/aeabi_cfcmp.S  Wed Jun 30 21:18:00 2021 +0000
@@ -27,12 +27,11 @@
         .syntax unified
         .p2align 2
 DEFINE_COMPILERRT_FUNCTION(__aeabi_cfcmpeq)
-        push {r0-r3, lr}
-        sub sp, #4
+        // Save ip to ensure stack alignment (could be any register)
+        push {r0-r3, ip, lr}
         bl __aeabi_cfcmpeq_check_nan
         cmp r0, #1
-        add sp, #4
-        pop {r0-r3, lr}
+        pop {r0-r3, ip, lr}
 
         // NaN has been ruled out, so __aeabi_cfcmple can't trap
         bne __aeabi_cfcmple
@@ -57,17 +56,15 @@ END_COMPILERRT_FUNCTION(__aeabi_cfcmpeq)
 DEFINE_COMPILERRT_FUNCTION(__aeabi_cfcmple)
         // Per the RTABI, this function must preserve r0-r11.
         // Save lr in the same instruction for compactness
-        push {r0-r3, lr}
-        sub sp, #4
+        // Save ip to ensure stack alignment (could be any register)
+        push {r0-r3, ip, lr}
 
         bl __aeabi_fcmplt
         cmp r0, #1
         moveq ip, #0
         beq 1f
 
-        add sp, #4
         ldm sp, {r0-r3}
-        sub sp, #4
         bl __aeabi_fcmpeq
         cmp r0, #1
         moveq ip, #(APSR_C | APSR_Z)
@@ -75,8 +72,7 @@ DEFINE_COMPILERRT_FUNCTION(__aeabi_cfcmp
 
 1:
         msr CPSR_f, ip
-        add sp, #4
-        pop {r0-r3}
+        pop {r0-r3, ip}
         POP_PC()
 END_COMPILERRT_FUNCTION(__aeabi_cfcmple)
 
diff -r e496d3df1493 -r 16758c643949 sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divmodsi4.S
--- a/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divmodsi4.S    Wed Jun 30 20:00:18 2021 +0000
+++ b/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divmodsi4.S    Wed Jun 30 21:18:00 2021 +0000
@@ -16,12 +16,9 @@
 #include "../assembly.h"
 
 #define ESTABLISH_FRAME    \
-    push   {r4-r7, lr}   ;\
-    add     r7,     sp, #12   ;\
-    sub     sp,     #4
+    push   {r4-r6, lr}
 #define CLEAR_FRAME_AND_RETURN \
-    add     sp,     #4   ;\
-    pop    {r4-r7, pc}
+    pop    {r4-r6, pc}
 
        .syntax unified
        .text
diff -r e496d3df1493 -r 16758c643949 sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divsi3.S
--- a/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divsi3.S       Wed Jun 30 20:00:18 2021 +0000
+++ b/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/divsi3.S       Wed Jun 30 21:18:00 2021 +0000
@@ -15,12 +15,9 @@
 #include "../assembly.h"
 
 #define ESTABLISH_FRAME \
-    push   {r4, r7, lr}    ;\
-    add     r7,     sp, #4   ;\
-    sub     sp,     #4
+    push   {r4, lr}
 #define CLEAR_FRAME_AND_RETURN \
-    add     sp,     #4   ;\
-    pop    {r4, r7, pc}
+    pop    {r4, pc}
 
        .syntax unified
        .text
diff -r e496d3df1493 -r 16758c643949 sys/external/bsd/compiler_rt/dist/lib/builtins/arm/modsi3.S
--- a/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/modsi3.S       Wed Jun 30 20:00:18 2021 +0000
+++ b/sys/external/bsd/compiler_rt/dist/lib/builtins/arm/modsi3.S       Wed Jun 30 21:18:00 2021 +0000
@@ -15,12 +15,9 @@
 #include "../assembly.h"
 
 #define ESTABLISH_FRAME \
-    push   {r4, r7, lr}    ;\
-    add     r7,     sp, #4   ;\
-    sub     sp,     #4
+    push   {r4, lr}
 #define CLEAR_FRAME_AND_RETURN \
-    add     sp,     #4   ;\
-    pop    {r4, r7, pc}
+    pop    {r4, pc}
 
        .syntax unified
        .text