| %default { "naninst":"li rTEMP, -1" } |
| %verify "executed" |
| %verify "basic lt, gt, eq */ |
| %verify "left arg NaN" |
| %verify "right arg NaN" |
| /* |
| * Compare two floating-point values. Puts 0, 1, or -1 into the |
| * destination register based on the results of the comparison. |
| * |
| * Provide a "naninst" instruction that puts 1 or -1 into a1 depending |
| * on what value we'd like to return when one of the operands is NaN. |
| * |
| * The operation we're implementing is: |
| * if (x == y) |
| * return 0; |
| * else if (x < y) |
| * return -1; |
| * else if (x > y) |
| * return 1; |
| * else |
| * return {-1,1}; // one or both operands was NaN |
| * |
| * On entry: |
| * a0 = &op1 [vBB] |
| * a1 = &op2 [vCC] |
| * |
| * for: cmpl-float, cmpg-float |
| */ |
| /* op vAA, vBB, vCC */ |
| |
| /* "clasic" form */ |
| #ifdef SOFT_FLOAT |
| LOAD(rOBJ, a0) # rOBJ<- vBB |
| LOAD(rBIX, a1) # rBIX<- vCC |
| move a0, rOBJ # a0<- vBB |
| move a1, rBIX # a1<- vCC |
| JAL(__eqsf2) # v0<- (vBB == vCC) |
| li rTEMP, 0 # vAA<- 0 |
| beqz v0, ${opcode}_finish |
| move a0, rOBJ # a0<- vBB |
| move a1, rBIX # a1<- vCC |
| JAL(__ltsf2) # a0<- (vBB < vCC) |
| li rTEMP, -1 # vAA<- -1 |
| bltz v0, ${opcode}_finish |
| move a0, rOBJ # a0<- vBB |
| move a1, rBIX # a1<- vCC |
| JAL(__gtsf2) # v0<- (vBB > vCC) |
| li rTEMP, 1 # vAA<- 1 |
| bgtz v0, ${opcode}_finish |
| #else |
| LOAD_F(ft0, a0) # ft0<- vBB |
| LOAD_F(ft1, a1) # ft1<- vCC |
| c.olt.s fcc0, ft0, ft1 #Is ft0 < ft1 |
| li rTEMP, -1 |
| bc1t fcc0, ${opcode}_finish |
| c.olt.s fcc0, ft1, ft0 |
| li rTEMP, 1 |
| bc1t fcc0, ${opcode}_finish |
| c.eq.s fcc0, ft0, ft1 |
| li rTEMP, 0 |
| bc1t fcc0, ${opcode}_finish |
| #endif |
| |
| $naninst |
| |
| ${opcode}_finish: |
| move v0, rTEMP # v0<- vAA |
| RETURN |