HelenOS sources
This source file includes following definitions.
- fpu_context_save
- fpu_context_restore
- fpu_enable
- fpu_disable
- fpu_init
#include <fpu_context.h>
#include <arch/register.h>
#include <arch/asm.h>
void fpu_context_save(fpu_context_t *fctx)
{
asm volatile (
"std %%f0, %0\n"
"std %%f2, %1\n"
"std %%f4, %2\n"
"std %%f6, %3\n"
"std %%f8, %4\n"
"std %%f10, %5\n"
"std %%f12, %6\n"
"std %%f14, %7\n"
"std %%f16, %8\n"
"std %%f18, %9\n"
"std %%f20, %10\n"
"std %%f22, %11\n"
"std %%f24, %12\n"
"std %%f26, %13\n"
"std %%f28, %14\n"
"std %%f30, %15\n"
: "=m" (fctx->d[0]), "=m" (fctx->d[1]), "=m" (fctx->d[2]), "=m" (fctx->d[3]),
"=m" (fctx->d[4]), "=m" (fctx->d[5]), "=m" (fctx->d[6]), "=m" (fctx->d[7]),
"=m" (fctx->d[8]), "=m" (fctx->d[9]), "=m" (fctx->d[10]), "=m" (fctx->d[11]),
"=m" (fctx->d[12]), "=m" (fctx->d[13]), "=m" (fctx->d[14]), "=m" (fctx->d[15])
);
asm volatile (
"std %%f32, %0\n"
"std %%f34, %1\n"
"std %%f36, %2\n"
"std %%f38, %3\n"
"std %%f40, %4\n"
"std %%f42, %5\n"
"std %%f44, %6\n"
"std %%f46, %7\n"
"std %%f48, %8\n"
"std %%f50, %9\n"
"std %%f52, %10\n"
"std %%f54, %11\n"
"std %%f56, %12\n"
"std %%f58, %13\n"
"std %%f60, %14\n"
"std %%f62, %15\n"
: "=m" (fctx->d[16]), "=m" (fctx->d[17]), "=m" (fctx->d[18]), "=m" (fctx->d[19]),
"=m" (fctx->d[20]), "=m" (fctx->d[21]), "=m" (fctx->d[22]), "=m" (fctx->d[23]),
"=m" (fctx->d[24]), "=m" (fctx->d[25]), "=m" (fctx->d[26]), "=m" (fctx->d[27]),
"=m" (fctx->d[28]), "=m" (fctx->d[29]), "=m" (fctx->d[30]), "=m" (fctx->d[31])
);
asm volatile ("stx %%fsr, %0\n" : "=m" (fctx->fsr));
}
void fpu_context_restore(fpu_context_t *fctx)
{
asm volatile (
"ldd %0, %%f0\n"
"ldd %1, %%f2\n"
"ldd %2, %%f4\n"
"ldd %3, %%f6\n"
"ldd %4, %%f8\n"
"ldd %5, %%f10\n"
"ldd %6, %%f12\n"
"ldd %7, %%f14\n"
"ldd %8, %%f16\n"
"ldd %9, %%f18\n"
"ldd %10, %%f20\n"
"ldd %11, %%f22\n"
"ldd %12, %%f24\n"
"ldd %13, %%f26\n"
"ldd %14, %%f28\n"
"ldd %15, %%f30\n"
:
: "m" (fctx->d[0]), "m" (fctx->d[1]), "m" (fctx->d[2]), "m" (fctx->d[3]),
"m" (fctx->d[4]), "m" (fctx->d[5]), "m" (fctx->d[6]), "m" (fctx->d[7]),
"m" (fctx->d[8]), "m" (fctx->d[9]), "m" (fctx->d[10]), "m" (fctx->d[11]),
"m" (fctx->d[12]), "m" (fctx->d[13]), "m" (fctx->d[14]), "m" (fctx->d[15])
);
asm volatile (
"ldd %0, %%f32\n"
"ldd %1, %%f34\n"
"ldd %2, %%f36\n"
"ldd %3, %%f38\n"
"ldd %4, %%f40\n"
"ldd %5, %%f42\n"
"ldd %6, %%f44\n"
"ldd %7, %%f46\n"
"ldd %8, %%f48\n"
"ldd %9, %%f50\n"
"ldd %10, %%f52\n"
"ldd %11, %%f54\n"
"ldd %12, %%f56\n"
"ldd %13, %%f58\n"
"ldd %14, %%f60\n"
"ldd %15, %%f62\n"
:
: "m" (fctx->d[16]), "m" (fctx->d[17]), "m" (fctx->d[18]), "m" (fctx->d[19]),
"m" (fctx->d[20]), "m" (fctx->d[21]), "m" (fctx->d[22]), "m" (fctx->d[23]),
"m" (fctx->d[24]), "m" (fctx->d[25]), "m" (fctx->d[26]), "m" (fctx->d[27]),
"m" (fctx->d[28]), "m" (fctx->d[29]), "m" (fctx->d[30]), "m" (fctx->d[31])
);
asm volatile ("ldx %0, %%fsr\n" : : "m" (fctx->fsr));
}
void fpu_enable(void)
{
pstate_reg_t pstate;
pstate.value = pstate_read();
pstate.pef = true;
pstate_write(pstate.value);
}
void fpu_disable(void)
{
pstate_reg_t pstate;
pstate.value = pstate_read();
pstate.pef = false;
pstate_write(pstate.value);
}
void fpu_init(void)
{
fpu_enable();
}
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