diff options
Diffstat (limited to 'src/math')
| -rw-r--r-- | src/math/big/arith_loong64.s | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/src/math/big/arith_loong64.s b/src/math/big/arith_loong64.s index a0130efc31..41229a1f0f 100644 --- a/src/math/big/arith_loong64.s +++ b/src/math/big/arith_loong64.s @@ -40,8 +40,30 @@ done: MOVV R10, c+56(FP) RET +// func subVW(z, x []Word, y Word) (c Word) TEXT ·subVW(SB),NOSPLIT,$0 - JMP ·subVW_g(SB) + // input: + // R4: z + // R5: z_len + // R7: x + // R10: y + MOVV z+0(FP), R4 + MOVV z_len+8(FP), R5 + MOVV x+24(FP), R7 + MOVV y+48(FP), R10 + MOVV $0, R6 + SLLV $3, R5 +loop: + BEQ R5, R6, done + MOVV (R6)(R7), R8 + SUBV R10, R8, R11 // x1 - c = z1, if z1 > x1 then overflow + SGTU R11, R8, R10 + MOVV R11, (R6)(R4) + ADDV $8, R6 + JMP loop +done: + MOVV R10, c+56(FP) + RET TEXT ·lshVU(SB),NOSPLIT,$0 JMP ·lshVU_g(SB) |