diff options
| author | bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-04-12 13:39:35 +0000 |
|---|---|---|
| committer | bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-04-12 13:39:35 +0000 |
| commit | 6daa377bb42d13707b5e954f1f217a58a2c25e6b (patch) | |
| tree | b13beefca85f131d4dfe6524d6ccf3324a44b684 /gcc/config/bfin/lib1funcs.asm | |
| parent | c9ddd4139a990ca0028b995f79b63ca2f3b89441 (diff) | |
| download | gcc-6daa377bb42d13707b5e954f1f217a58a2c25e6b.tar.gz | |
* config/bfin/lib1funcs.asm (___umulsi3_highpart, __smulsi3_highpart):
Use a more efficient implementation.
* config/bfin/bfin.md (umulsi3_highpart, smulsi3_highpart): Emit
inline sequences when not optimizing for size.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@123748 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/bfin/lib1funcs.asm')
| -rw-r--r-- | gcc/config/bfin/lib1funcs.asm | 42 |
1 files changed, 12 insertions, 30 deletions
diff --git a/gcc/config/bfin/lib1funcs.asm b/gcc/config/bfin/lib1funcs.asm index 1d2db9beb3e..fe4c3d53eb5 100644 --- a/gcc/config/bfin/lib1funcs.asm +++ b/gcc/config/bfin/lib1funcs.asm @@ -123,17 +123,12 @@ ___umodsi3: .type ___umulsi3_highpart, STT_FUNC; ___umulsi3_highpart: - R2 = R1.H * R0.H, R3 = R1.L * R0.H (FU); - R0 = R1.L * R0.L, R1 = R1.H * R0.L (FU); - R0 >>= 16; - /* Unsigned multiplication has the nice property that we can - ignore carry on this first addition. */ - R0 = R0 + R3; - R0 = R0 + R1; - cc = ac0; - R1 = cc; - R1 = PACK(R1.l,R0.h); - R0 = R1 + R2; + A1 = R1.L * R0.L (FU); + A1 = A1 >> 16; + A0 = R1.H * R0.H, A1 += R1.L * R0.H (FU); + A1 += R0.L * R1.H (FU); + A1 = A1 >> 16; + R0 = (A0 += A1); RTS; #endif @@ -143,24 +138,11 @@ ___umulsi3_highpart: .type ___smulsi3_highpart, STT_FUNC; ___smulsi3_highpart: - R2 = R1.L * R0.L (FU); - R3 = R1.H * R0.L (IS,M); - R0 = R0.H * R1.H, R1 = R0.H * R1.L (IS,M); - - R1.L = R2.H + R1.L; - cc = ac0; - R2 = cc; - - R1.L = R1.L + R3.L; - cc = ac0; - R1 >>>= 16; - R3 >>>= 16; - R1 = R1 + R3; - R1 = R1 + R2; - R2 = cc; - R1 = R1 + R2; - - R0 = R0 + R1; + A1 = R1.L * R0.L (FU); + A1 = A1 >> 16; + A0 = R0.H * R1.H, A1 += R0.H * R1.L (IS,M); + A1 += R1.H * R0.L (IS,M); + A1 = A1 >>> 16; + R0 = (A0 += A1); RTS; #endif - |