*vfp fn: update README

Author: sbechet

README.md

@@ -103,9 +103,7 @@ rely on CI.
 - [x] aarch64/chkstk.S
 - [x] adddf3.c
 - [x] addsf3.c
-- [x] arm/adddf3vfp.S
 - [x] arm/addsf3.S
-- [x] arm/addsf3vfp.S
 - [x] arm/aeabi_dcmp.S
 - [x] arm/aeabi_fcmp.S
 - [x] arm/aeabi_idivmod.S
@@ -116,45 +114,13 @@ rely on CI.
 - [x] arm/aeabi_uidivmod.S
 - [x] arm/aeabi_uldivmod.S
 - [ ] arm/chkstk.S
-- [x] arm/divdf3vfp.S
 - [ ] arm/divmodsi4.S (generic version is done)
-- [x] arm/divsf3vfp.S
 - [ ] arm/divsi3.S (generic version is done)
-- [x] arm/eqdf2vfp.S
-- [x] arm/eqsf2vfp.S
-- [x] arm/extendsfdf2vfp.S
-- [ ] arm/fixdfsivfp.S
-- [ ] arm/fixsfsivfp.S
-- [ ] arm/fixunsdfsivfp.S
-- [ ] arm/fixunssfsivfp.S
-- [ ] arm/floatsidfvfp.S
-- [ ] arm/floatsisfvfp.S
-- [ ] arm/floatunssidfvfp.S
-- [ ] arm/floatunssisfvfp.S
-- [x] arm/gedf2vfp.S
-- [x] arm/gesf2vfp.S
-- [x] arm/gtdf2vfp.S
-- [x] arm/gtsf2vfp.S
-- [x] arm/ledf2vfp.S
-- [x] arm/lesf2vfp.S
-- [x] arm/ltdf2vfp.S
-- [x] arm/ltsf2vfp.S
 - [ ] arm/modsi3.S (generic version is done)
-- [x] arm/muldf3vfp.S
-- [x] arm/mulsf3vfp.S
-- [x] arm/nedf2vfp.S
-- [ ] arm/negdf2vfp.S
-- [ ] arm/negsf2vfp.S
-- [x] arm/nesf2vfp.S
 - [x] arm/softfloat-alias.list
-- [x] arm/subdf3vfp.S
-- [x] arm/subsf3vfp.S
-- [x] arm/truncdfsf2vfp.S
 - [ ] arm/udivmodsi4.S (generic version is done)
 - [ ] arm/udivsi3.S (generic version is done)
 - [ ] arm/umodsi3.S (generic version is done)
-- [ ] arm/unorddf2vfp.S
-- [ ] arm/unordsf2vfp.S
 - [x] ashldi3.c
 - [x] ashrdi3.c
 - [ ] avr/divmodhi4.S
@@ -501,6 +467,43 @@ Floating-point implementations of builtins that are only called from soft-float
 - ~~x86_64/floatdidf.c~~
 - ~~x86_64/floatdisf.c~~
 
+Unsupported in any current target: used on old versions of 32-bit iOS with ARMv5.
+
+- ~~[x] arm/adddf3vfp.S~~
+- ~~[x] arm/addsf3vfp.S~~
+- ~~[x] arm/divdf3vfp.S~~
+- ~~[x] arm/divsf3vfp.S~~
+- ~~[x] arm/eqdf2vfp.S~~
+- ~~[x] arm/eqsf2vfp.S~~
+- ~~[x] arm/extendsfdf2vfp.S~~
+- ~~[ ] arm/fixdfsivfp.S~~
+- ~~[ ] arm/fixsfsivfp.S~~
+- ~~[ ] arm/fixunsdfsivfp.S~~
+- ~~[ ] arm/fixunssfsivfp.S~~
+- ~~[ ] arm/floatsidfvfp.S~~
+- ~~[ ] arm/floatsisfvfp.S~~
+- ~~[ ] arm/floatunssidfvfp.S~~
+- ~~[ ] arm/floatunssisfvfp.S~~
+- ~~[x] arm/gedf2vfp.S~~
+- ~~[x] arm/gesf2vfp.S~~
+- ~~[x] arm/gtdf2vfp.S~~
+- ~~[x] arm/gtsf2vfp.S~~
+- ~~[x] arm/ledf2vfp.S~~
+- ~~[x] arm/lesf2vfp.S~~
+- ~~[x] arm/ltdf2vfp.S~~
+- ~~[x] arm/ltsf2vfp.S~~
+- ~~[x] arm/muldf3vfp.S~~
+- ~~[x] arm/mulsf3vfp.S~~
+- ~~[x] arm/nedf2vfp.S~~
+- ~~[ ] arm/negdf2vfp.S~~
+- ~~[ ] arm/negsf2vfp.S~~
+- ~~[x] arm/nesf2vfp.S~~
+- ~~[x] arm/subdf3vfp.S~~
+- ~~[x] arm/subsf3vfp.S~~
+- ~~[x] arm/truncdfsf2vfp.S~~
+- ~~[ ] arm/unorddf2vfp.S~~
+- ~~[ ] arm/unordsf2vfp.S~~
+
 ## License
 
 The compiler-builtins crate is dual licensed under both the University of