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author | Xavier Leroy <xavier.leroy@college-de-france.fr> | 2020-12-06 10:30:51 +0100 |
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committer | Xavier Leroy <xavier.leroy@college-de-france.fr> | 2020-12-06 12:18:57 +0100 |
commit | ef5477a47b49c405744319fbdef0a689b1bf03d4 (patch) | |
tree | 47de3060e1e67749e67ec4d7b16046cb5227b1fc /powerpc/Asmgen.v | |
parent | e6e036b3f285d2f3ba2a5036a413eb9c7d7534cd (diff) | |
download | compcert-ef5477a47b49c405744319fbdef0a689b1bf03d4.tar.gz compcert-ef5477a47b49c405744319fbdef0a689b1bf03d4.zip |
Remove Pfcfi, Pfcfiu, Pfctiu pseudoinstructions
Also remove the Ofloatofint, Ofloatofintu, and Ointuoffloat
PowerPC operations.
The pseudoinstructions were used to implement these operations,
as follows:
Pfcfi : Ofloatofint i.e. the conversion signed int32 -> float64
Pfcfiu : Ofloatofintu i.e. the conversion unsigned int32 -> float64
Pfctiu : Ointuoffloat i.e. the conversion float64 -> unsigned int32
These pseudoinstructions were expanded (in Asmexpand.ml) in terms of
Pfcfid : signed int64 -> float64
Pfctidz : float64 -> signed int64
and int32/int64 conversions.
This commit performs this expansion during instruction selection
(SelectOp.vp):
floatofint(n) becomes floatoflong(longofint(n))
floatofintu(n) becomes floatoflong(longuofint(n))
intuoffloat(n) becomes cast32unsigned(longoffloat(n))
Then there is no need for the 3 removed operations and the 3 removed
pseudoinstructions.
More importantly, the correctness of these expansions is now proved as
part of instruction selection, using the corresponding results from
Floats.v.
Diffstat (limited to 'powerpc/Asmgen.v')
-rw-r--r-- | powerpc/Asmgen.v | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/powerpc/Asmgen.v b/powerpc/Asmgen.v index a686414a..1dca4ba4 100644 --- a/powerpc/Asmgen.v +++ b/powerpc/Asmgen.v @@ -611,15 +611,6 @@ Definition transl_op | Ointoffloat, a1 :: nil => do r1 <- freg_of a1; do r <- ireg_of res; OK (Pfcti r r1 :: k) - | Ointuoffloat, a1 :: nil => - do r1 <- freg_of a1; do r <- ireg_of res; - OK (Pfctiu r r1 :: k) - | Ofloatofint, a1 :: nil => - do r1 <- ireg_of a1; do r <- freg_of res; - OK (Pfcfi r r1 :: k) - | Ofloatofintu, a1 :: nil => - do r1 <- ireg_of a1; do r <- freg_of res; - OK (Pfcfiu r r1 :: k) | Ofloatofwords, a1 :: a2 :: nil => do r1 <- ireg_of a1; do r2 <- ireg_of a2; do r <- freg_of res; OK (Pfmake r r1 r2 :: k) |