fmv.h.x

Half-precision floating-point move from integer

This instruction is defined by:

Encoding

Synopsis

Moves the half-precision value encoded in IEEE 754-2008 standard encoding from the lower 16 bits of integer register rs1 to the floating-point register fd. The bits are not modified in the transfer, and in particular, the payloads of non-canonical NaNs are preserved.

Access

Always

Decode Variables

Bits<5> rs1 = $encoding[19:15];
Bits<5> fd = $encoding[11:7];

Execution

Pruned, XLEN == 64
Original

%%LINK%func;check_f_ok;check_f_ok%%($encoding);
Bits<16> hp_value = X[rs1][15:0];
f[fd] = %%LINK%func;nan_box;nan_box%%<16, FLEN>(hp_value);
%%LINK%func;mark_f_state_dirty;mark_f_state_dirty%%();

%%LINK%func;check_f_ok;check_f_ok%%($encoding);
Bits<16> hp_value = X[rs1][15:0];
f[fd] = %%LINK%func;nan_box;nan_box%%<16, FLEN>(hp_value);
%%LINK%func;mark_f_state_dirty;mark_f_state_dirty%%();

Exceptions

This instruction may result in the following synchronous exceptions:

IllegalInstruction