1 #if defined(__mips_hard_float) 2 typedef enum { 3 TO_NEAREST=0, 4 TO_ZERO, 5 TO_PLUS_INFINITY, 6 TO_MINUS_INFINITY 7 } round_mode_t; 8 9 char *round_mode_name[] = { "near", "zero", "+inf", "-inf" }; 10 11 void set_rounding_mode(round_mode_t mode) 12 { 13 switch(mode) { 14 case TO_NEAREST: 15 __asm__ __volatile__( 16 "cfc1 $t0, $31" "\n\t" 17 "srl $t0, 2" "\n\t" 18 "sll $t0, 2" "\n\t" 19 "ctc1 $t0, $31" "\n\t" 20 : 21 : 22 : "t0" 23 ); 24 break; 25 case TO_ZERO: 26 __asm__ __volatile__( 27 "cfc1 $t0, $31" "\n\t" 28 "srl $t0, 2" "\n\t" 29 "sll $t0, 2" "\n\t" 30 "addiu $t0, 1" "\n\t" 31 "ctc1 $t0, $31" "\n\t" 32 : 33 : 34 : "t0" 35 ); 36 break; 37 case TO_PLUS_INFINITY: 38 __asm__ __volatile__( 39 "cfc1 $t0, $31" "\n\t" 40 "srl $t0, 2" "\n\t" 41 "sll $t0, 2" "\n\t" 42 "addiu $t0, 2" "\n\t" 43 "ctc1 $t0, $31" "\n\t" 44 : 45 : 46 : "t0" 47 ); 48 break; 49 case TO_MINUS_INFINITY: 50 __asm__ __volatile__( 51 "cfc1 $t0, $31" "\n\t" 52 "srl $t0, 2" "\n\t" 53 "sll $t0, 2" "\n\t" 54 "addiu $t0, 3" "\n\t" 55 "ctc1 $t0, $31" "\n\t" 56 : 57 : 58 : "t0" 59 ); 60 break; 61 } 62 } 63 64 void clear_fcc(){ 65 __asm__ __volatile__( 66 "cfc1 $t0, $31" "\n\t" 67 "and $t0, $t0, 0x17FFFFF" "\n\t" 68 "ctc1 $t0, $31" "\n\t" 69 : 70 : 71 : "t0" 72 ); 73 } 74 #endif 75
