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- #define UMULL(Rs,Rm,Rhi,Rlo,S) WORD $((14<<28)|(4<<21)|(S<<20)|(Rhi<<16)|(Rlo<<12)|(Rs<<8)|(9<<4)|Rm)
- #define UMLAL(Rs,Rm,Rhi,Rlo,S) WORD $((14<<28)|(5<<21)|(S<<20)|(Rhi<<16)|(Rlo<<12)|(Rs<<8)|(9<<4)|Rm)
- #define MUL(Rs,Rm,Rd,S) WORD $((14<<28)|(0<<21)|(S<<20)|(Rd<<16)|(Rs<<8)|(9<<4)|Rm)
- arg=0
- /* replaced use of R10 by R11 because the former can be the data segment base register */
- TEXT _mulv(SB), $0
- MOVW 4(FP), R9 /* l0 */
- MOVW 8(FP), R11 /* h0 */
- MOVW 12(FP), R4 /* l1 */
- MOVW 16(FP), R5 /* h1 */
- UMULL(4, 9, 7, 6, 0)
- MUL(11, 4, 8, 0)
- ADD R8, R7
- MUL(9, 5, 8, 0)
- ADD R8, R7
- MOVW R6, 0(R(arg))
- MOVW R7, 4(R(arg))
- RET
- /* multiply, add, and right-shift, yielding a 32-bit result, while
- using 64-bit accuracy for the multiply -- for fast fixed-point math */
- TEXT _mularsv(SB), $0
- MOVW 4(FP), R11 /* m1 */
- MOVW 8(FP), R8 /* a */
- MOVW 12(FP), R4 /* rs */
- MOVW $0, R9
- UMLAL(0, 11, 9, 8, 0)
- MOVW R8>>R4, R8
- RSB $32, R4, R4
- ORR R9<<R4, R8, R0
- RET
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