From fbe78d46877a32a8d825d8c93acfdc4466f8ffc3 Mon Sep 17 00:00:00 2001 From: cinap_lenrek Date: Wed, 25 Mar 2015 14:19:05 +0100 Subject: mpdigdiv.s: aaaaand its gone! --- sys/src/libmp/mips/_mpdigdiv.s | 41 +++++++++++++++++++++++++++++++++++++++++ sys/src/libmp/mips/mpdigdiv.s | 41 ----------------------------------------- 2 files changed, 41 insertions(+), 41 deletions(-) create mode 100644 sys/src/libmp/mips/_mpdigdiv.s delete mode 100644 sys/src/libmp/mips/mpdigdiv.s diff --git a/sys/src/libmp/mips/_mpdigdiv.s b/sys/src/libmp/mips/_mpdigdiv.s new file mode 100644 index 000000000..b7fd330e7 --- /dev/null +++ b/sys/src/libmp/mips/_mpdigdiv.s @@ -0,0 +1,41 @@ +/* + * This only works on R[45]000 chips that allow 64 bit + * integer arithmetic even when uding 32 bit addresses + * + * R1 = dividend* + * R2 = dividend[low] + * R3 = dividend[high] + * R4 = 32 bit divisor + * R5 = quotient* + */ +TEXT mpdigdiv(SB),$0 + + MOVW 0(R1),R2 + MOVW 4(R1),R3 + MOVW divisor+4(FP),R4 + MOVW quotient+8(FP),R5 + + /* divisor == 0 */ + BEQ R4,_digovfl + + /* dividend >= 2^32 * divisor */ + SGTU R4,R3,R7 + BEQ R7,_digovfl + +_digdiv1: + SLLV $32,R2 + SLLV $32,R3 + SRLV $32,R2 + ADDVU R2,R3 + SLLV $32,R4 + SRLV $32,R4 + DIVVU R4,R3 + MOVW LO,R1 + MOVW R1,0(R5) + RET + +_digovfl: + MOVW $-1,R1 + MOVW R1,0(R5) + RET + diff --git a/sys/src/libmp/mips/mpdigdiv.s b/sys/src/libmp/mips/mpdigdiv.s deleted file mode 100644 index b7fd330e7..000000000 --- a/sys/src/libmp/mips/mpdigdiv.s +++ /dev/null @@ -1,41 +0,0 @@ -/* - * This only works on R[45]000 chips that allow 64 bit - * integer arithmetic even when uding 32 bit addresses - * - * R1 = dividend* - * R2 = dividend[low] - * R3 = dividend[high] - * R4 = 32 bit divisor - * R5 = quotient* - */ -TEXT mpdigdiv(SB),$0 - - MOVW 0(R1),R2 - MOVW 4(R1),R3 - MOVW divisor+4(FP),R4 - MOVW quotient+8(FP),R5 - - /* divisor == 0 */ - BEQ R4,_digovfl - - /* dividend >= 2^32 * divisor */ - SGTU R4,R3,R7 - BEQ R7,_digovfl - -_digdiv1: - SLLV $32,R2 - SLLV $32,R3 - SRLV $32,R2 - ADDVU R2,R3 - SLLV $32,R4 - SRLV $32,R4 - DIVVU R4,R3 - MOVW LO,R1 - MOVW R1,0(R5) - RET - -_digovfl: - MOVW $-1,R1 - MOVW R1,0(R5) - RET - -- cgit v1.2.3