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FW: Update dump_xsave() to print the APX Extended GPRs #345

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FW: Update dump_xsave() to print the APX Extended GPRs #345

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27 changes: 27 additions & 0 deletions framework/sandstone_context_dump.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
#include "fp_vectors/Floats.h"

#include <algorithm>
#include <array>
#include <limits>

#ifdef __unix__
Expand All @@ -25,6 +26,8 @@
# include <cpuid.h>
#endif

using ApxState = std::array<int64_t, 16>;

union xmmreg
{
__m128 f;
Expand Down Expand Up @@ -296,6 +299,27 @@ void dump_gprs(FILE *f, const mcontext_t mc)
}
#endif

static void print_egprs(FILE *f, const Fxsave *state)
{
int offset = xsave_offset(XSave_ApxState);
if (offset + sizeof(ApxState) <= Fxsave::size)
return;

auto base = reinterpret_cast<const uint8_t *>(state);
auto egprs = reinterpret_cast<const ApxState *>(base + offset);
char regname[] = "r16";
for (int64_t value : *egprs) {
print_gpr(f, regname, value);

// increment the register name
if (regname[2]++ == '9') {
// NB: the AAA instruction would be useful for this!
++regname[1];
regname[2] = '0';
}
}
}

static void print_x87mmx_registers(FILE *f, const Fxsave *state)
{
int fptop = (state->fsw >> 11) & 7;
Expand Down Expand Up @@ -467,6 +491,9 @@ void dump_xsave(FILE *f, const void *xsave_area, size_t xsave_size, int xsave_du
return; // bit vector contains invalid bits
}

if (mask & XSave_ApxState)
print_egprs(f, state);

if (mask & XSave_X87)
print_x87mmx_registers(f, state);

Expand Down