diff options
Diffstat (limited to 'gcc/config/h8300/lib1funcs.asm')
| -rw-r--r-- | gcc/config/h8300/lib1funcs.asm | 42 |
1 files changed, 35 insertions, 7 deletions
diff --git a/gcc/config/h8300/lib1funcs.asm b/gcc/config/h8300/lib1funcs.asm index 41cb3bc9f55..35e8999121e 100644 --- a/gcc/config/h8300/lib1funcs.asm +++ b/gcc/config/h8300/lib1funcs.asm @@ -1,7 +1,7 @@ ;; libgcc1 routines for the Hitachi H8/300 CPU. ;; Contributed by Steve Chamberlain <sac@cygnus.com> -/* Copyright (C) 1994, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1994, 2000, 2001 Free Software Foundation, Inc. This file is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the @@ -251,7 +251,7 @@ ___umodhi3: ; q low 8 bits of quot ; P preserve -; The h8 only has a 16/8 bit divide, so we look at the incoming and +; The H8/300 only has a 16/8 bit divide, so we look at the incoming and ; see how to partition up the expression. .global ___udivhi3 @@ -502,10 +502,10 @@ reti: POPP S2P rts - ; takes A0/A1 numerator (A0P for 300h) - ; A2/A3 denominator (A1P for 300h) - ; returns A0/A1 quotient (A0P for 300h) - ; S0/S1 remainder (S0P for 300h) + ; takes A0/A1 numerator (A0P for 300H) + ; A2/A3 denominator (A1P for 300H) + ; returns A0/A1 quotient (A0P for 300H) + ; S0/S1 remainder (S0P for 300H) ; trashes S2 #ifdef __H8300__ @@ -634,7 +634,7 @@ setone: #ifdef L_mulhi3 ;; HImode multiply. -; The h8 only has an 8*8->16 multiply. +; The H8/300 only has an 8*8->16 multiply. ; The answer is the same as: ; ; product = (srca.l * srcb.l) + ((srca.h * srcb.l) + (srcb.h * srca.l)) * 256 @@ -764,3 +764,31 @@ _done: #endif #endif /* L_mulsi3 */ +#ifdef L_fixunssfsi_asm +/* For the h8300 we use asm to save some bytes, to + allow more programs to fit into the tiny address + space. For h8300h / h8s, the C version is good enough. */ +#ifdef __H8300__ +/* We still treat NANs different than libgcc2.c, but then, the + behaviour is undefined anyways. */ + .global ___fixunssfsi +___fixunssfsi: + cmp.b #0x47,r0h + bge Large_num + jmp @___fixsfsi +Large_num: + bhi L_huge_num + xor.b #0x80,A0L + bmi L_shift8 +L_huge_num: + mov.w #65535,A0 + mov.w A0,A1 + rts +L_shift8: + mov.b A0L,A0H + mov.b A1H,A0L + mov.b A1L,A1H + mov.b #0,A1L + rts +#endif +#endif /* L_fixunssfsi_asm */ |