diff options
author | Antonio Sánchez <cantonios@google.com> | 2021-03-03 18:51:51 +0000 |
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committer | Antonio Sánchez <cantonios@google.com> | 2021-03-03 18:51:51 +0000 |
commit | 9a663973b499a53be3e30eb7521545af820fdfc4 (patch) | |
tree | d7547ca70c4e28c461b05294894ded5730f7a791 /Eigen/src/Core/arch/SSE | |
parent | e72dfeb8b9fa5662831b5d0bb9d132521f9173dd (diff) |
Revert "Fix rint for SSE/NEON."
This reverts commit e72dfeb8b9fa5662831b5d0bb9d132521f9173dd
Diffstat (limited to 'Eigen/src/Core/arch/SSE')
-rwxr-xr-x | Eigen/src/Core/arch/SSE/PacketMath.h | 35 |
1 files changed, 10 insertions, 25 deletions
diff --git a/Eigen/src/Core/arch/SSE/PacketMath.h b/Eigen/src/Core/arch/SSE/PacketMath.h index 652ad1d34..b9821ad80 100755 --- a/Eigen/src/Core/arch/SSE/PacketMath.h +++ b/Eigen/src/Core/arch/SSE/PacketMath.h @@ -646,35 +646,20 @@ template<> EIGEN_STRONG_INLINE Packet2d pfloor<Packet2d>(const Packet2d& a) { re #else template<> EIGEN_STRONG_INLINE Packet4f print(const Packet4f& a) { // Adds and subtracts signum(a) * 2^23 to force rounding. - const Packet4f limit = pset1<Packet4f>(static_cast<float>(1<<23)); - const Packet4f abs_a = pabs(a); - // Inline asm to prevent the compiler from optimizing away the - // addition and subtraction. - // Packet4f r = psub(padd(abs_a, limit), limit); - Packet4f r = abs_a; - __asm__ ("addps %[limit], %[r]\n\t" - "subps %[limit], %[r]" : [r] "+x" (r) : [limit] "x" (limit)); - // If greater than limit, simply return a. Otherwise, account for sign. - r = pselect(pcmp_lt(abs_a, limit), - pselect(pcmp_lt(a, pzero(a)), pnegate(r), r), a); - return r; + const Packet4f offset = + pselect(pcmp_lt(a, pzero(a)), + pset1<Packet4f>(-static_cast<float>(1<<23)), + pset1<Packet4f>(+static_cast<float>(1<<23))); + return psub(padd(a, offset), offset); } template<> EIGEN_STRONG_INLINE Packet2d print(const Packet2d& a) { // Adds and subtracts signum(a) * 2^52 to force rounding. - const Packet2d limit = pset1<Packet2d>(static_cast<double>(1ull<<52)); - const Packet2d abs_a = pabs(a); - // Inline asm to prevent the compiler from optimizing away the - // addition and subtraction. - // Packet2d r = psub(padd(abs_a, limit), limit); - Packet2d r = abs_a; - asm("addpd %[limit], %[r] \n\t" - "subpd %[limit], %[r]" : [r] "+x" (r) : [limit] "x" (limit)); - - // If greater than limit, simply return a. Otherwise, account for sign. - r = pselect(pcmp_lt(abs_a, limit), - pselect(pcmp_lt(a, pzero(a)), pnegate(r), r), a); - return r; + const Packet2d offset = + pselect(pcmp_lt(a, pzero(a)), + pset1<Packet2d>(-static_cast<double>(1ull<<52)), + pset1<Packet2d>(+static_cast<double>(1ull<<52))); + return psub(padd(a, offset), offset); } template<> EIGEN_STRONG_INLINE Packet4f pfloor<Packet4f>(const Packet4f& a) |