diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2016-06-26 15:16:23 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2016-06-26 15:16:23 +0200 |
| commit | 69b0980a42da16d97349ea962e57a5f55684e1a8 (patch) | |
| tree | f76348957a5c60a693b4706fca2de14e23d891fc /sys/src/libc/arm/vlop.s | |
| parent | a99cf56c7d670f6af88cab39de91f1d6ac36416f (diff) | |
libc: native _addv() and _subv() routines for arm
Diffstat (limited to 'sys/src/libc/arm/vlop.s')
| -rw-r--r-- | sys/src/libc/arm/vlop.s | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/sys/src/libc/arm/vlop.s b/sys/src/libc/arm/vlop.s index 13f4948fe..bc2237a86 100644 --- a/sys/src/libc/arm/vlop.s +++ b/sys/src/libc/arm/vlop.s @@ -3,11 +3,30 @@ TEXT _mulv(SB), 1, $0 MOVW 8(FP),R11 /* h0 */ MOVW 12(FP),R4 /* l1 */ MOVW 16(FP),R5 /* h1 */ - MULLU R8,R4,(R6, R7) /* l0*l1 */ + MULLU R8,R4,(R7,R6) /* l0*l1 */ MUL R8,R5,R5 /* l0*h1 */ + ADD R5,R7 MUL R11,R4,R4 /* h0*l1 */ - ADD R4,R6 - ADD R5,R6 - MOVW R6,4(R0) - MOVW R7,0(R0) + ADD R4,R7 + MOVM.IA [R6,R7],(R0) + RET + +TEXT _addv(SB), 1, $0 + MOVW 4(FP),R8 /* l0 */ + MOVW 8(FP),R11 /* h0 */ + MOVW 12(FP),R4 /* l1 */ + MOVW 16(FP),R5 /* h1 */ + ADD.S R8,R4 + ADC R11,R5 + MOVM.IA [R4,R5],(R0) + RET + +TEXT _subv(SB), 1, $0 + MOVW 4(FP),R8 /* l0 */ + MOVW 8(FP),R11 /* h0 */ + MOVW 12(FP),R4 /* l1 */ + MOVW 16(FP),R5 /* h1 */ + SUB.S R4,R8,R4 + SBC R5,R11,R5 + MOVM.IA [R4,R5],(R0) RET |