fmadd.s
No synopsis available.
This instruction is defined by:
-
F, version >= 0
This instruction is included in the following profiles:
-
RVA20S64 (Mandatory)
-
RVA20U64 (Mandatory)
-
RVA22S64 (Mandatory)
-
RVA22U64 (Mandatory)
Synopsis
This instruction must have data-independent timing when extension Zkt is enabled. |
No description available.
Decode Variables
Bits<5> fs3 = $encoding[31:27];
Bits<5> fs2 = $encoding[24:20];
Bits<5> fs1 = $encoding[19:15];
Bits<3> rm = $encoding[14:12];
Bits<5> fd = $encoding[11:7];
Execution
-
IDL
-
Sail
{
let rs1_val_32b = F_or_X_S(rs1);
let rs2_val_32b = F_or_X_S(rs2);
let rs3_val_32b = F_or_X_S(rs3);
match (select_instr_or_fcsr_rm (rm)) {
None() => { handle_illegal(); RETIRE_FAIL },
Some(rm') => {
let rm_3b = encdec_rounding_mode(rm');
let (fflags, rd_val_32b) : (bits(5), bits(32)) =
match op {
FMADD_S => riscv_f32MulAdd (rm_3b, rs1_val_32b, rs2_val_32b, rs3_val_32b),
FMSUB_S => riscv_f32MulAdd (rm_3b, rs1_val_32b, rs2_val_32b, negate_S (rs3_val_32b)),
FNMSUB_S => riscv_f32MulAdd (rm_3b, negate_S (rs1_val_32b), rs2_val_32b, rs3_val_32b),
FNMADD_S => riscv_f32MulAdd (rm_3b, negate_S (rs1_val_32b), rs2_val_32b, negate_S (rs3_val_32b))
};
accrue_fflags(fflags);
F_or_X_S(rd) = rd_val_32b;
RETIRE_SUCCESS
}
}
}