fcvt.s.w
Convert signed 32-bit integer to single-precision float
This instruction is defined by:
Synopsis
Converts a 32-bit signed integer in integer register rs1 into a floating-point number in floating-point register fd.
All floating-point to integer and integer to floating-point conversion instructions round
according to the rm field.
A floating-point register can be initialized to floating-point positive zero using
fcvt.s.w rd, x0, which will never set any exception flags.
All floating-point conversion instructions set the Inexact exception flag if the rounded result differs from the operand value and the Invalid exception flag is not set.
Decode Variables
Bits<5> rs1 = $encoding[19:15];
Bits<3> rm = $encoding[14:12];
Bits<5> fd = $encoding[11:7];Execution
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Pruned, XLEN == 64
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Original
check_f_ok($encoding);
RoundingMode rounding_mode = rm_to_mode(rm, $encoding);
X[fd] = i32_to_f32(X[rs1], rounding_mode);
mark_f_state_dirty();check_f_ok($encoding);
RoundingMode rounding_mode = rm_to_mode(rm, $encoding);
X[fd] = i32_to_f32(X[rs1], rounding_mode);
mark_f_state_dirty();