On 10/24/2013 3:38 PM, Richard Henderson wrote:
On 10/24/2013 09:25 AM, Tom Musta wrote:
\
snip
+ft1 = tp##_to_##btp(s-fld[i], env-fp_status); \
+ft0 = btp##_##sum(ft0, ft1, env-fp_status);
On 10/24/2013 3:38 PM, Richard Henderson wrote:
On 10/24/2013 09:25 AM, Tom Musta wrote:
\
+ft0 = tp##_to_##btp(xa.fld[i], env-fp_status); \
+ft1 = tp##_to_##btp(m-fld[i], env-fp_status); \
On 10/25/2013 09:25 AM, Tom Musta wrote:
I tried recoding xsmaddadp using float64_muladd. The problem that I hit is
the
boundary case where the intermediate product and the summand are infinities of
the opposite sign. This is the case handled by the first if in the code
snippet above.
On 10/25/2013 11:42 AM, Richard Henderson wrote:
I believe that a better implementation could use float*_muladd, and check the
result for float_flag_invalid. If set, compute the intermediate product so you
can figure out the VXISI setting. But we'd expect that to be an unlikely path.
On 25 October 2013 17:25, Tom Musta tommu...@gmail.com wrote:
On 10/24/2013 3:38 PM, Richard Henderson wrote:
You want to be using tp##muladd instead of widening to 128 bits.
I tried recoding xsmaddadp using float64_muladd. The problem that I hit is
the
boundary case where the intermediate
On 10/25/2013 10:13 AM, Tom Musta wrote:
On 10/25/2013 11:42 AM, Richard Henderson wrote:
I believe that a better implementation could use float*_muladd, and check the
result for float_flag_invalid. If set, compute the intermediate product so
you
can figure out the VXISI setting. But we'd
On 10/25/2013 10:20 AM, Peter Maydell wrote:
Are you sure that doing the arithmetic with the softfloat 128 bit
float operations doesn't set the inexact flag anywhere it
shouldn't? (ie where the intermediate product is not exact in
128 bit format but the final result is exact in 64 or 32 bits).
This patch adds the VSX floating point multiply/add instructions
defined by V2.06 of the PowerPC ISA:
- xsmaddadp, xvmaddadp, xvmaddasp
- xsmaddmdp, xvmaddmdp, xvmaddmsp
- xsmsubadp, xvmsubadp, xvmsubasp
- xsmsubmdp, xvmsubmdp, xvmsubmsp
- xsnmaddadp, xvnmaddadp, xvnmaddasp
-
On 10/24/2013 09:25 AM, Tom Musta wrote:
\
+ft0 = tp##_to_##btp(xa.fld[i], env-fp_status);
\
+ft1 = tp##_to_##btp(m-fld[i], env-fp_status);
\
+ft0 = btp##_mul(ft0, ft1,
