several entries got significantly better, though they still aren't done.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44382 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/README.txt b/lib/Target/ARM/README.txt
index da249b7..068c441 100644
--- a/lib/Target/ARM/README.txt
+++ b/lib/Target/ARM/README.txt
@@ -186,24 +186,19 @@
}
_bar:
- sub sp, sp, #16
- str r4, [sp, #+12]
- str r5, [sp, #+8]
- str lr, [sp, #+4]
- mov r4, r0
- mov r5, r1
- ldr r0, LCPI2_0
- bl _foo
- fmsr f0, r0
- fcvtsd d0, f0
- fmdrr d1, r4, r5
- faddd d0, d0, d1
- fmrrd r0, r1, d0
- ldr lr, [sp, #+4]
- ldr r5, [sp, #+8]
- ldr r4, [sp, #+12]
- add sp, sp, #16
- bx lr
+ stmfd sp!, {r4, r5, r7, lr}
+ add r7, sp, #8
+ mov r4, r0
+ mov r5, r1
+ fldd d0, LCPI1_0
+ fmrrd r0, r1, d0
+ bl _foo
+ fmdrr d0, r4, r5
+ fmsr s2, r0
+ fsitod d1, s2
+ faddd d0, d1, d0
+ fmrrd r0, r1, d0
+ ldmfd sp!, {r4, r5, r7, pc}
Ignore the prologue and epilogue stuff for a second. Note
mov r4, r0
@@ -501,32 +496,15 @@
two signed 32-bit values to produce a 64-bit value, and accumulates this with
a 64-bit value.
-We currently get this with v6:
+We currently get this with both v4 and v6:
_foo:
- mul r12, r1, r0
- smmul r1, r1, r0
- smmul r0, r3, r2
- mul r3, r3, r2
- adds r3, r3, r12
- adc r0, r0, r1
+ smull r1, r0, r1, r0
+ smull r3, r2, r3, r2
+ adds r3, r3, r1
+ adc r0, r2, r0
bx lr
-and this with v4:
-
-_foo:
- stmfd sp!, {r7, lr}
- mov r7, sp
- mul r12, r1, r0
- smull r0, r1, r1, r0
- smull lr, r0, r3, r2
- mul r3, r3, r2
- adds r3, r3, r12
- adc r0, r0, r1
- ldmfd sp!, {r7, pc}
-
-This apparently occurs in real code.
-
//===---------------------------------------------------------------------===//
This: