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https://github.com/YosysHQ/yosys
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cxxrtl: always inline internal cells and slice/concat operations.
This can result in massive reduction in runtime, up to 50% depending on workload. Currently people are using `-mllvm -inline-threshold=` as a workaround (with clang++), but this solution is more portable.
This commit is contained in:
whitequark
parent
a5f0cb4eba
commit
107911dbec
1 changed files with 108 additions and 4 deletions
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@ -17,6 +17,11 @@
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*/
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// This file is included by the designs generated with `write_cxxrtl`. It is not used in Yosys itself.
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//
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// The CXXRTL support library implements compile time specialized arbitrary width arithmetics, as well as provides
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// composite lvalues made out of bit slices and concatenations of lvalues. This allows the `write_cxxrtl` pass
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// to perform a straightforward translation of RTLIL structures to readable C++, relying on the C++ compiler
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// to unwrap the abstraction and generate efficient code.
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#ifndef CXXRTL_H
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#define CXXRTL_H
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@ -35,10 +40,19 @@
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#include <backends/cxxrtl/cxxrtl_capi.h>
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// The CXXRTL support library implements compile time specialized arbitrary width arithmetics, as well as provides
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// composite lvalues made out of bit slices and concatenations of lvalues. This allows the `write_cxxrtl` pass
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// to perform a straightforward translation of RTLIL structures to readable C++, relying on the C++ compiler
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// to unwrap the abstraction and generate efficient code.
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// CXXRTL essentially uses the C++ compiler as a hygienic macro engine that feeds an instruction selector.
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// It generates a lot of specialized template functions with relatively large bodies that, when inlined
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// into the caller and (for those with loops) unrolled, often expose many new optimization opportunities.
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// Because of this, most of the CXXRTL runtime must be always inlined for best performance.
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#ifndef __has_attribute
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# define __has_attribute(x) 0
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#endif
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#if __has_attribute(always_inline)
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#define CXXRTL_ALWAYS_INLINE inline __attribute__((__always_inline__))
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#else
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#define CXXRTL_ALWAYS_INLINE inline
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#endif
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namespace cxxrtl {
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// All arbitrary-width values in CXXRTL are backed by arrays of unsigned integers called chunks. The chunk size
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@ -85,6 +99,7 @@ struct value : public expr_base<value<Bits>> {
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value<Bits> &operator=(const value<Bits> &) = default;
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// A (no-op) helper that forces the cast to value<>.
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CXXRTL_ALWAYS_INLINE
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const value<Bits> &val() const {
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return *this;
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}
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@ -101,6 +116,7 @@ struct value : public expr_base<value<Bits>> {
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// The trunc, zext and sext operations add or remove most significant bits (i.e. on the left);
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// the rtrunc and rzext operations add or remove least significant bits (i.e. on the right).
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template<size_t NewBits>
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CXXRTL_ALWAYS_INLINE
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value<NewBits> trunc() const {
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static_assert(NewBits <= Bits, "trunc() may not increase width");
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value<NewBits> result;
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@ -111,6 +127,7 @@ struct value : public expr_base<value<Bits>> {
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}
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template<size_t NewBits>
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CXXRTL_ALWAYS_INLINE
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value<NewBits> zext() const {
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static_assert(NewBits >= Bits, "zext() may not decrease width");
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value<NewBits> result;
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@ -120,6 +137,7 @@ struct value : public expr_base<value<Bits>> {
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}
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template<size_t NewBits>
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CXXRTL_ALWAYS_INLINE
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value<NewBits> sext() const {
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static_assert(NewBits >= Bits, "sext() may not decrease width");
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value<NewBits> result;
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@ -135,6 +153,7 @@ struct value : public expr_base<value<Bits>> {
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}
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template<size_t NewBits>
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CXXRTL_ALWAYS_INLINE
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value<NewBits> rtrunc() const {
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static_assert(NewBits <= Bits, "rtrunc() may not increase width");
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value<NewBits> result;
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@ -154,6 +173,7 @@ struct value : public expr_base<value<Bits>> {
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}
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template<size_t NewBits>
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CXXRTL_ALWAYS_INLINE
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value<NewBits> rzext() const {
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static_assert(NewBits >= Bits, "rzext() may not decrease width");
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value<NewBits> result;
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@ -172,6 +192,7 @@ struct value : public expr_base<value<Bits>> {
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// Bit blit operation, i.e. a partial read-modify-write.
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template<size_t Stop, size_t Start>
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CXXRTL_ALWAYS_INLINE
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value<Bits> blit(const value<Stop - Start + 1> &source) const {
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static_assert(Stop >= Start, "blit() may not reverse bit order");
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constexpr chunk::type start_mask = ~(chunk::mask << (Start % chunk::bits));
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@ -196,6 +217,7 @@ struct value : public expr_base<value<Bits>> {
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// than the operand. In C++17 these can be replaced with `if constexpr`.
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template<size_t NewBits, typename = void>
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struct zext_cast {
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CXXRTL_ALWAYS_INLINE
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value<NewBits> operator()(const value<Bits> &val) {
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return val.template zext<NewBits>();
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}
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@ -203,6 +225,7 @@ struct value : public expr_base<value<Bits>> {
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template<size_t NewBits>
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struct zext_cast<NewBits, typename std::enable_if<(NewBits < Bits)>::type> {
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CXXRTL_ALWAYS_INLINE
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value<NewBits> operator()(const value<Bits> &val) {
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return val.template trunc<NewBits>();
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}
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@ -210,6 +233,7 @@ struct value : public expr_base<value<Bits>> {
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template<size_t NewBits, typename = void>
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struct sext_cast {
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CXXRTL_ALWAYS_INLINE
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value<NewBits> operator()(const value<Bits> &val) {
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return val.template sext<NewBits>();
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}
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@ -217,17 +241,20 @@ struct value : public expr_base<value<Bits>> {
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template<size_t NewBits>
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struct sext_cast<NewBits, typename std::enable_if<(NewBits < Bits)>::type> {
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CXXRTL_ALWAYS_INLINE
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value<NewBits> operator()(const value<Bits> &val) {
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return val.template trunc<NewBits>();
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}
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};
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template<size_t NewBits>
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CXXRTL_ALWAYS_INLINE
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value<NewBits> zcast() const {
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return zext_cast<NewBits>()(*this);
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}
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template<size_t NewBits>
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CXXRTL_ALWAYS_INLINE
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value<NewBits> scast() const {
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return sext_cast<NewBits>()(*this);
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}
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@ -439,12 +466,14 @@ struct slice_expr : public expr_base<slice_expr<T, Stop, Start>> {
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slice_expr(T &expr) : expr(expr) {}
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slice_expr(const slice_expr<T, Stop, Start> &) = delete;
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CXXRTL_ALWAYS_INLINE
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operator value<bits>() const {
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return static_cast<const value<T::bits> &>(expr)
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.template rtrunc<T::bits - Start>()
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.template trunc<bits>();
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}
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CXXRTL_ALWAYS_INLINE
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slice_expr<T, Stop, Start> &operator=(const value<bits> &rhs) {
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// Generic partial assignment implemented using a read-modify-write operation on the sliced expression.
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expr = static_cast<const value<T::bits> &>(expr)
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@ -453,6 +482,7 @@ struct slice_expr : public expr_base<slice_expr<T, Stop, Start>> {
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}
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// A helper that forces the cast to value<>, which allows deduction to work.
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CXXRTL_ALWAYS_INLINE
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value<bits> val() const {
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return static_cast<const value<bits> &>(*this);
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}
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@ -469,6 +499,7 @@ struct concat_expr : public expr_base<concat_expr<T, U>> {
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concat_expr(T &ms_expr, U &ls_expr) : ms_expr(ms_expr), ls_expr(ls_expr) {}
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concat_expr(const concat_expr<T, U> &) = delete;
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CXXRTL_ALWAYS_INLINE
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operator value<bits>() const {
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value<bits> ms_shifted = static_cast<const value<T::bits> &>(ms_expr)
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.template rzext<bits>();
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@ -477,6 +508,7 @@ struct concat_expr : public expr_base<concat_expr<T, U>> {
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return ms_shifted.bit_or(ls_extended);
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}
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CXXRTL_ALWAYS_INLINE
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concat_expr<T, U> &operator=(const value<bits> &rhs) {
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ms_expr = rhs.template rtrunc<T::bits>();
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ls_expr = rhs.template trunc<U::bits>();
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@ -484,6 +516,7 @@ struct concat_expr : public expr_base<concat_expr<T, U>> {
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}
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// A helper that forces the cast to value<>, which allows deduction to work.
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CXXRTL_ALWAYS_INLINE
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value<bits> val() const {
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return static_cast<const value<bits> &>(*this);
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}
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@ -508,21 +541,25 @@ struct concat_expr : public expr_base<concat_expr<T, U>> {
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template<class T>
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struct expr_base {
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template<size_t Stop, size_t Start = Stop>
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CXXRTL_ALWAYS_INLINE
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slice_expr<const T, Stop, Start> slice() const {
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return {*static_cast<const T *>(this)};
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}
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template<size_t Stop, size_t Start = Stop>
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CXXRTL_ALWAYS_INLINE
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slice_expr<T, Stop, Start> slice() {
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return {*static_cast<T *>(this)};
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}
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template<class U>
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CXXRTL_ALWAYS_INLINE
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concat_expr<const T, typename std::remove_reference<const U>::type> concat(const U &other) const {
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return {*static_cast<const T *>(this), other};
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}
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template<class U>
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CXXRTL_ALWAYS_INLINE
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concat_expr<T, typename std::remove_reference<U>::type> concat(U &&other) {
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return {*static_cast<T *>(this), other};
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}
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@ -851,271 +888,322 @@ using namespace cxxrtl;
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// std::max isn't constexpr until C++14 for no particular reason (it's an oversight), so we define our own.
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template<class T>
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CXXRTL_ALWAYS_INLINE
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constexpr T max(const T &a, const T &b) {
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return a > b ? a : b;
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}
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// Logic operations
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template<size_t BitsY, size_t BitsA>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> logic_not(const value<BitsA> &a) {
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return value<BitsY> { a ? 0u : 1u };
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> logic_and(const value<BitsA> &a, const value<BitsB> &b) {
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return value<BitsY> { (bool(a) & bool(b)) ? 1u : 0u };
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> logic_or(const value<BitsA> &a, const value<BitsB> &b) {
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return value<BitsY> { (bool(a) | bool(b)) ? 1u : 0u };
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}
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// Reduction operations
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template<size_t BitsY, size_t BitsA>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> reduce_and(const value<BitsA> &a) {
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return value<BitsY> { a.bit_not().is_zero() ? 1u : 0u };
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}
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template<size_t BitsY, size_t BitsA>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> reduce_or(const value<BitsA> &a) {
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return value<BitsY> { a ? 1u : 0u };
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}
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template<size_t BitsY, size_t BitsA>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> reduce_xor(const value<BitsA> &a) {
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return value<BitsY> { (a.ctpop() % 2) ? 1u : 0u };
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}
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template<size_t BitsY, size_t BitsA>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> reduce_xnor(const value<BitsA> &a) {
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return value<BitsY> { (a.ctpop() % 2) ? 0u : 1u };
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}
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template<size_t BitsY, size_t BitsA>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> reduce_bool(const value<BitsA> &a) {
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return value<BitsY> { a ? 1u : 0u };
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}
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// Bitwise operations
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template<size_t BitsY, size_t BitsA>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> not_u(const value<BitsA> &a) {
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return a.template zcast<BitsY>().bit_not();
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}
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template<size_t BitsY, size_t BitsA>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> not_s(const value<BitsA> &a) {
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return a.template scast<BitsY>().bit_not();
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> and_uu(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template zcast<BitsY>().bit_and(b.template zcast<BitsY>());
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> and_ss(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template scast<BitsY>().bit_and(b.template scast<BitsY>());
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> or_uu(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template zcast<BitsY>().bit_or(b.template zcast<BitsY>());
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> or_ss(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template scast<BitsY>().bit_or(b.template scast<BitsY>());
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> xor_uu(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template zcast<BitsY>().bit_xor(b.template zcast<BitsY>());
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> xor_ss(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template scast<BitsY>().bit_xor(b.template scast<BitsY>());
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> xnor_uu(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template zcast<BitsY>().bit_xor(b.template zcast<BitsY>()).bit_not();
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> xnor_ss(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template scast<BitsY>().bit_xor(b.template scast<BitsY>()).bit_not();
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> shl_uu(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template zcast<BitsY>().template shl(b);
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> shl_su(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template scast<BitsY>().template shl(b);
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> sshl_uu(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template zcast<BitsY>().template shl(b);
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> sshl_su(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template scast<BitsY>().template shl(b);
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> shr_uu(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template shr(b).template zcast<BitsY>();
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> shr_su(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template shr(b).template scast<BitsY>();
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> sshr_uu(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template shr(b).template zcast<BitsY>();
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> sshr_su(const value<BitsA> &a, const value<BitsB> &b) {
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return a.template sshr(b).template scast<BitsY>();
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> shift_uu(const value<BitsA> &a, const value<BitsB> &b) {
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return shr_uu<BitsY>(a, b);
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}
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template<size_t BitsY, size_t BitsA, size_t BitsB>
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CXXRTL_ALWAYS_INLINE
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value<BitsY> shift_su(const value<BitsA> &a, const value<BitsB> &b) {
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return shr_su<BitsY>(a, b);
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}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> shift_us(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return b.is_neg() ? shl_uu<BitsY>(a, b.template sext<BitsB + 1>().neg()) : shr_uu<BitsY>(a, b);
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> shift_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return b.is_neg() ? shl_su<BitsY>(a, b.template sext<BitsB + 1>().neg()) : shr_su<BitsY>(a, b);
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> shiftx_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return shift_uu<BitsY>(a, b);
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> shiftx_su(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return shift_su<BitsY>(a, b);
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> shiftx_us(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return shift_us<BitsY>(a, b);
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> shiftx_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return shift_ss<BitsY>(a, b);
|
||||
}
|
||||
|
||||
// Comparison operations
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> eq_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY>{ a.template zext<BitsExt>() == b.template zext<BitsExt>() ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> eq_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY>{ a.template sext<BitsExt>() == b.template sext<BitsExt>() ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> ne_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY>{ a.template zext<BitsExt>() != b.template zext<BitsExt>() ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> ne_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY>{ a.template sext<BitsExt>() != b.template sext<BitsExt>() ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> eqx_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return eq_uu<BitsY>(a, b);
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> eqx_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return eq_ss<BitsY>(a, b);
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> nex_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return ne_uu<BitsY>(a, b);
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> nex_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return ne_ss<BitsY>(a, b);
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> gt_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY> { b.template zext<BitsExt>().ucmp(a.template zext<BitsExt>()) ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> gt_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY> { b.template sext<BitsExt>().scmp(a.template sext<BitsExt>()) ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> ge_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY> { !a.template zext<BitsExt>().ucmp(b.template zext<BitsExt>()) ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> ge_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY> { !a.template sext<BitsExt>().scmp(b.template sext<BitsExt>()) ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> lt_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY> { a.template zext<BitsExt>().ucmp(b.template zext<BitsExt>()) ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> lt_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY> { a.template sext<BitsExt>().scmp(b.template sext<BitsExt>()) ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> le_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY> { !b.template zext<BitsExt>().ucmp(a.template zext<BitsExt>()) ? 1u : 0u };
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> le_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t BitsExt = max(BitsA, BitsB);
|
||||
return value<BitsY> { !b.template sext<BitsExt>().scmp(a.template sext<BitsExt>()) ? 1u : 0u };
|
||||
|
|
@ -1123,46 +1211,55 @@ value<BitsY> le_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
|||
|
||||
// Arithmetic operations
|
||||
template<size_t BitsY, size_t BitsA>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> pos_u(const value<BitsA> &a) {
|
||||
return a.template zcast<BitsY>();
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> pos_s(const value<BitsA> &a) {
|
||||
return a.template scast<BitsY>();
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> neg_u(const value<BitsA> &a) {
|
||||
return a.template zcast<BitsY>().neg();
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> neg_s(const value<BitsA> &a) {
|
||||
return a.template scast<BitsY>().neg();
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> add_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return a.template zcast<BitsY>().add(b.template zcast<BitsY>());
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> add_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return a.template scast<BitsY>().add(b.template scast<BitsY>());
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> sub_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return a.template zcast<BitsY>().sub(b.template zcast<BitsY>());
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> sub_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return a.template scast<BitsY>().sub(b.template scast<BitsY>());
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> mul_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
value<BitsY> product;
|
||||
value<BitsY> multiplicand = a.template zcast<BitsY>();
|
||||
|
|
@ -1180,6 +1277,7 @@ value<BitsY> mul_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
|||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> mul_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
value<BitsB + 1> ub = b.template sext<BitsB + 1>();
|
||||
if (ub.is_neg()) ub = ub.neg();
|
||||
|
|
@ -1188,6 +1286,7 @@ value<BitsY> mul_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
|||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
std::pair<value<BitsY>, value<BitsY>> divmod_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
constexpr size_t Bits = max(BitsY, max(BitsA, BitsB));
|
||||
value<Bits> quotient;
|
||||
|
|
@ -1209,6 +1308,7 @@ std::pair<value<BitsY>, value<BitsY>> divmod_uu(const value<BitsA> &a, const val
|
|||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
std::pair<value<BitsY>, value<BitsY>> divmod_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
value<BitsA + 1> ua = a.template sext<BitsA + 1>();
|
||||
value<BitsB + 1> ub = b.template sext<BitsB + 1>();
|
||||
|
|
@ -1222,21 +1322,25 @@ std::pair<value<BitsY>, value<BitsY>> divmod_ss(const value<BitsA> &a, const val
|
|||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> div_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return divmod_uu<BitsY>(a, b).first;
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> div_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return divmod_ss<BitsY>(a, b).first;
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> mod_uu(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return divmod_uu<BitsY>(a, b).second;
|
||||
}
|
||||
|
||||
template<size_t BitsY, size_t BitsA, size_t BitsB>
|
||||
CXXRTL_ALWAYS_INLINE
|
||||
value<BitsY> mod_ss(const value<BitsA> &a, const value<BitsB> &b) {
|
||||
return divmod_ss<BitsY>(a, b).second;
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue