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vfp: Add decoders for VFPv5

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These instructions were introduced in the Cortex-M7
This commit is contained in:
MerryMage 2020-06-19 19:24:05 +01:00
parent 55c021fe82
commit 4df3b2f97f
2 changed files with 25 additions and 4 deletions
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24
src/frontend/A32/decoder/vfp.h
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@ -22,16 +22,32 @@ using VFPMatcher = Decoder::Matcher<Visitor, u32>;
template<typename V>
std::optional<std::reference_wrapper<const VFPMatcher<V>>> DecodeVFP(u32 instruction) {
static const std::vector<VFPMatcher<V>> table = {
using Table = std::vector<VFPMatcher<V>>;
static const struct Tables {
Table unconditional;
Table conditional;
} tables = []{
Table list = {
#define INST(fn, name, bitstring) Decoder::detail::detail<VFPMatcher<V>>::GetMatcher(&V::fn, name, bitstring),
#include "vfp.inc"
#undef INST
};
};
if ((instruction & 0xF0000000) == 0xF0000000)
return std::nullopt; // Don't try matching any unconditional instructions.
const auto division = std::stable_partition(list.begin(), list.end(), [&](const auto& matcher) {
return (matcher.GetMask() & 0xF0000000) == 0xF0000000;
});
return Tables{
Table{list.begin(), division},
Table{division, list.end()},
};
}();
const bool is_unconditional = (instruction & 0xF0000000) == 0xF0000000;
const Table& table = is_unconditional ? tables.unconditional : tables.conditional;
const auto matches_instruction = [instruction](const auto& matcher){ return matcher.Matches(instruction); };

5
src/frontend/A32/decoder/vfp.inc
View file

@ -12,6 +12,9 @@ INST(vfp_VFNMS, "VFNMS", "cccc11101D01nnnndddd101zN
INST(vfp_VFNMA, "VFNMA", "cccc11101D01nnnndddd101zN1M0mmmm") // VFPv4
INST(vfp_VFMA, "VFMA", "cccc11101D10nnnndddd101zN0M0mmmm") // VFPv4
INST(vfp_VFMS, "VFMS", "cccc11101D10nnnndddd101zN1M0mmmm") // VFPv4
//INST(vfp_VSEL, "VSEL", "111111100Dccnnnndddd101zN0M0mmmm") // VFPv5
//INST(vfp_VMAXNM, "VMAXNNM", "111111101D00nnnndddd101zN0M0mmmm") // VFPv5
//INST(vfp_VMINNM, "VMINNM", "111111101D00nnnndddd101zN1M0mmmm") // VFPv5
// Other floating-point data-processing instructions
INST(vfp_VMOV_imm, "VMOV (immediate)", "cccc11101D11vvvvdddd101z0000vvvv") // VFPv3
@ -29,6 +32,8 @@ INST(vfp_VCVT_from_int, "VCVT (from int)", "cccc11101D111000dddd101zs
INST(vfp_VCVT_to_u32, "VCVT (to u32)", "cccc11101D111100dddd101zr1M0mmmm") // VFPv2
INST(vfp_VCVT_to_s32, "VCVT (to s32)", "cccc11101D111101dddd101zr1M0mmmm") // VFPv2
//INST(vfp_VCVT_to_fixed, "VCVT (to fixed)", "cccc11101D11111Udddd101zx1i0vvvv") // VFPv3
//INST(vfp_VRINT_rm, "VRINT{A,N,P,M}", "111111101D1110mmdddd101z01M0mmmm") // VFPv5
//INST(vfp_VCVT_rm, "VCVT{A,N,P,M}", "111111101D1111mmdddd101zU1M0mmmm") // VFPv5
// Floating-point move instructions
INST(vfp_VMOV_u32_f64, "VMOV (core to f64)", "cccc11100000ddddtttt1011D0010000") // VFPv2