Rev. 1.50, 10/04, page 420 of 448
10.3.25 FTRC (Floating-point Truncate and Convert to integer): Floating-Point
Instruction
PR Format Operation Instruction Code Cycle T Bit
0 FTRC FRm,FPUL (long)FRm → FPUL 1111mmmm00111101 1 —
1 FTRC DRm,FPUL (long)DRm → FPUL 1111mmm000111101 1 —
Description: When FPSCR.PR = 0: Converts the single-precision floating-point number in FRm
to a 32-bit integer, and stores the result in FPUL.
When FPSCR.PR = 1: Converts the double-precision floating-point number in FRm to a 32-bit
integer, and stores the result in FPUL.
The rounding mode is always truncation.
Notes: None
Operation:
#define N_INT_SINGLE_RANGE 0xcf000000 & 0x7fffffff /* -1.000000 * 2^31 */
#define P_INT_SINGLE_RANGE 0x4effffff /* 1.fffffe * 2^30 */
#define N_INT_DOUBLE_RANGE 0xc1e0000000200000 & 0x7fffffffffffffff
#define P_INT_DOUBLE_RANGE 0x41e0000000000000
void FTRC(int m, int *FPUL)
{
pc += 2;
clear_cause();
if(FPSCR.PR==0){
case(ftrc_single_ type_of(m)){
NORM: *FPUL = FR[m]; break;
PINF: ftrc_invalid(0,*FPUL); break;
NINF: ftrc_invalid(1,*FPUL); break;
}
}
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