diff options
| -rw-r--r-- | powerpc/Asmexpand.ml | 26 | ||||
| -rw-r--r-- | powerpc/CBuiltins.ml | 6 |
2 files changed, 32 insertions, 0 deletions
diff --git a/powerpc/Asmexpand.ml b/powerpc/Asmexpand.ml index d299e2cd..a27eeeb7 100644 --- a/powerpc/Asmexpand.ml +++ b/powerpc/Asmexpand.ml @@ -38,6 +38,8 @@ let _6 = coqint_of_camlint 6l let _8 = coqint_of_camlint 8l let _31 = coqint_of_camlint 31l let _32 = coqint_of_camlint 32l +let _64 = coqint_of_camlint 64l +let _m1 = coqint_of_camlint (-1l) let _m4 = coqint_of_camlint (-4l) let _m8 = coqint_of_camlint (-8l) @@ -369,6 +371,30 @@ let expand_builtin_inline name args res = (* high bits all zero, count bits in low word and increment by 32 *) emit (Padd(res, res, GPR0)); emit (Plabel lbl) + | ("__builtin_ctz" | "__builtin_ctzl"), [BA(IR a1)], BR(IR res) -> + emit (Paddi(GPR0, a1, Cint _m1)); (* tmp := x-1 *) + emit (Pandc(res, GPR0, a1)); (* res := tmp & ~(x) *) + emit (Pcntlzw(res, res)); (* res := #leading zeros *) + emit (Psubfic(res, res, Cint _32)) (* res := 32 - #leading zeros *) + | "__builtin_ctzll", [BA_splitlong(BA(IR ah), BA(IR al))], BR(IR res) -> + let lbl1 = new_label () in + let lbl2 = new_label () in + (* low word equal to zero? *) + emit (Pcmpwi (al, Cint _0)); + emit (Pbf (CRbit_2, lbl1)); + (* low word is zero, count trailing zeros in high word and increment by 32 *) + emit (Paddi(GPR0, ah, Cint _m1)); + emit (Pandc(res, GPR0, ah)); + emit (Pcntlzw(res, res)); + emit (Psubfic(res, res, Cint _64)); + emit (Pb lbl2); + (* count trailing zeros in low word *) + emit (Plabel lbl1); + emit (Paddi(GPR0, al, Cint _m1)); + emit (Pandc(res, GPR0, al)); + emit (Pcntlzw(res, res)); + emit (Psubfic(res, res, Cint _32)); + emit (Plabel lbl2) | "__builtin_cmpb", [BA(IR a1); BA(IR a2)], BR(IR res) -> emit (Pcmpb (res,a1,a2)) | ("__builtin_bswap" | "__builtin_bswap32"), [BA(IR a1)], BR(IR res) -> diff --git a/powerpc/CBuiltins.ml b/powerpc/CBuiltins.ml index d244cba0..d33d6252 100644 --- a/powerpc/CBuiltins.ml +++ b/powerpc/CBuiltins.ml @@ -34,6 +34,12 @@ let builtins = { (TInt(IInt, []), [TInt(IULong, [])], false); "__builtin_clzll", (TInt(IInt, []), [TInt(IULongLong, [])], false); + "__builtin_ctz", + (TInt(IInt, []), [TInt(IUInt, [])], false); + "__builtin_ctzl", + (TInt(IInt, []), [TInt(IULong, [])], false); + "__builtin_ctzll", + (TInt(IInt, []), [TInt(IULongLong, [])], false); "__builtin_bswap", (TInt(IUInt, []), [TInt(IUInt, [])], false); "__builtin_bswap32", |