GMP «Arithmetic without limitations» GMP mpn anomalies
Last modified:2019-05-22 15:53


The purpose of these measurements is to highlight possible improvements of GMP's low-level functions. The comparisons might include C fallbacks; in such cases the result indicates the need for asm implementation.

This is a new page, and it will therefore have glitches:

  1. Results for notoriously inaccurate machines should either be suppressed or else be given greater tolerance (e.g. pentium4, bulldozers).
  2. The tolerance ranges might be too narrow in some cases.

system/abi under-performing
function
factor
(expected lower)
comparison
function
bobcat/64: add_n 1.05 addlsh1_n
bobcat/64: add_n 1.23 sub_n
pirigentoo64/64: addlsh2_n 1.29 addlsh_n
zengentoo64/64: addlsh2_n 1.29 addlsh_n
bwlgentoo64/64: addlsh_n 1.06 addmul_1.3
paddy/64: addlsh_n 1.06 addmul_1.3
skygentoo64/64: addlsh_n 1.07 addmul_1.3
yubel2/64: addlsh_n 1.07 addmul_1.3
jaggentoo64/64: addlsh_n 1.10 addmul_1.3
k10gentoo64/64: addlsh_n 1.13 addmul_1.3
gege/64: addlsh_n 1.53 addlsh1_n
pilegentoo64/64: addlsh_n 1.61 addlsh1_n
bullgentoo64/64: addlsh_n 1.70 addlsh1_n
jaggentoo64/64: addlsh_n 1.70 addlsh2_n
bobcat/64: addlsh_n 1.75 addlsh1_n
slmgentoo64/64: addlsh_n 1.75 addlsh1_n
slmgentoo64/64: addlsh_n 1.75 addlsh2_n
jaggentoo64/64: addlsh_n 1.84 addlsh1_n
element/64: addlsh_n 2.34 addlsh2_n
element/64: addlsh_n 2.35 addlsh1_n
beagle/32: addmul_1.3 0.84 addmul_2
k10gentoo64/64: addmul_1.3 1.04 submul_1.3
bobcat/64: addmul_1.3 1.08 submul_1.3
hwlgentoo64/64: addmul_1.3 1.37 mul_1.3
cough/32: addmul_1.3 1.39 mul_1.3
glmgentoo64/32: addmul_1.3 1.39 mul_1.3
jaggentoo64/64: addmul_2 2.07 addmul_1.3
yubel2/64: addmul_2 2.42 addmul_1.3
paddy/64: addmul_2 2.44 addmul_1.3
skygentoo64/64: addmul_2 2.44 addmul_1.3
bwlgentoo64/64: addmul_2 2.45 addmul_1.3
zengentoo64/64: copyd 1.17 copyi
pirigentoo64/64: copyd 1.19 copyi
bobcat/64: copyd 1.21 copyi
g5/mode32: copyi 1.05 copyd
excagentoo64/64: copyi 1.06 copyd
bobcat/32: copyi 1.10 copyd
beagle/32: mul_1.3 1.04 addmul_1.3
slmgentoo64/32: mul_1.3 1.07 addmul_1.3
cough/64: mul_basecase 2.00 mullo_basecase
element/64: mul_basecase 2.21 mullo_basecase
gcc1-power7/mode64: mullo_basecase 0.72 mul_basecase
g5/mode64: mullo_basecase 0.75 mul_basecase
gege/32: mullo_basecase 0.78 mul_basecase
glmgentoo64/32: mullo_basecase 0.81 mul_basecase
slmgentoo64/32: mullo_basecase 0.82 mul_basecase
pirigentoo64/32: mullo_basecase 0.83 mul_basecase
zengentoo64/32: mullo_basecase 0.83 mul_basecase
odxu4/32: mullo_basecase 0.84 mul_basecase
pilegentoo64/32: mullo_basecase 0.86 mul_basecase
k10gentoo64/32: mullo_basecase 0.87 mul_basecase
jaggentoo64/32: mullo_basecase 0.88 mul_basecase
tinker/32: mullo_basecase 0.88 mul_basecase
bullgentoo64/32: mullo_basecase 0.89 mul_basecase
excagentoo64/32: mullo_basecase 0.89 mul_basecase
cnrgentoo64/32: mullo_basecase 0.90 mul_basecase
nhmgentoo64/32: mullo_basecase 0.90 mul_basecase
pnrgentoo64/32: mullo_basecase 0.90 mul_basecase
paddy/32: mullo_basecase 0.91 mul_basecase
labrador/32: mullo_basecase 0.92 mul_basecase
element/32: mullo_basecase 0.93 mul_basecase
gcc135/mode64: mullo_basecase 0.93 mul_basecase
odc1/32: mullo_basecase 0.93 mul_basecase
skygentoo64/32: mullo_basecase 0.93 mul_basecase
cough/32: mullo_basecase 0.94 mul_basecase
yubel2/32: mullo_basecase 0.94 mul_basecase
bobcat/32: mullo_basecase 0.95 mul_basecase
parks/32: mullo_basecase 0.97 mul_basecase
tambo/32: mullo_basecase 0.98 mul_basecase
beagle/32: mullo_basecase 1.02 mul_basecase
bwlgentoo64/32: mullo_basecase 1.09 mul_basecase
sbrgentoo64/32: mullo_basecase 1.10 mul_basecase
hwlgentoo64/32: mullo_basecase 1.13 mul_basecase
nhmgentoo64/64: redc_1 1.26 mul_basecase
g5/mode64: redc_1 1.30 mul_basecase
slmgentoo64/32: redc_1 1.38 mul_basecase
cnrgentoo64/64: redc_1 1.39 mul_basecase
pnrgentoo64/64: redc_1 1.39 mul_basecase
gege/32: redc_1 1.44 mul_basecase
k10gentoo64/32: redc_1 1.47 mul_basecase
pirigentoo64/64: redc_1 1.47 mul_basecase
zengentoo64/64: redc_1 1.48 mul_basecase
tambo/32: redc_1 1.5 mul_basecase
glmgentoo64/32: redc_1 1.54 mul_basecase
labrador/32: redc_1 1.6 mul_basecase
jaggentoo64/32: redc_1 1.62 mul_basecase
nhmgentoo64/32: redc_1 1.64 mul_basecase
pirigentoo64/32: redc_1 1.64 mul_basecase
bullgentoo64/32: redc_1 1.65 mul_basecase
excagentoo64/32: redc_1 1.65 mul_basecase
zengentoo64/32: redc_1 1.65 mul_basecase
cough/32: redc_1 1.66 mul_basecase
pilegentoo64/32: redc_1 1.66 mul_basecase
cnrgentoo64/32: redc_1 1.68 mul_basecase
pnrgentoo64/32: redc_1 1.69 mul_basecase
tinker/32: redc_1 1.71 mul_basecase
bobcat/32: redc_1 1.73 mul_basecase
odc1/32: redc_1 1.76 mul_basecase
element/32: redc_1 1.81 mul_basecase
gcc135/mode64: redc_1 1.82 mul_basecase
beagle/32: redc_1 1.92 mul_basecase
paddy/32: redc_1 1.94 mul_basecase
yubel2/32: redc_1 1.94 mul_basecase
skygentoo64/32: redc_1 1.95 mul_basecase
bwlgentoo64/32: redc_1 2.06 mul_basecase
sbrgentoo64/32: redc_1 2.09 mul_basecase
parks/32: redc_1 2.1 mul_basecase
hwlgentoo64/32: redc_1 2.11 mul_basecase
bobcat/64: rsblsh1_n 1.15 addlsh1_n
element/64: rsblsh1_n 2.11 addlsh1_n
pirigentoo64/64: rsblsh2_n 1.30 rsblsh_n
zengentoo64/64: rsblsh2_n 1.30 rsblsh_n
element/64: rsblsh2_n 2.00 addlsh2_n
bobcat/64: rsblsh_n 1.14 addlsh_n
gege/64: rsblsh_n 1.54 rsblsh1_n
pilegentoo64/64: rsblsh_n 1.62 rsblsh1_n
bobcat/64: rsblsh_n 1.70 rsblsh2_n
jaggentoo64/64: rsblsh_n 1.71 rsblsh2_n
bobcat/64: rsblsh_n 1.74 rsblsh1_n
bullgentoo64/64: rsblsh_n 1.75 rsblsh1_n
slmgentoo64/64: rsblsh_n 1.75 rsblsh1_n
slmgentoo64/64: rsblsh_n 1.75 rsblsh2_n
jaggentoo64/64: rsblsh_n 1.84 rsblsh1_n
bobcat/64: rsh1add_n 1.17 rsh1sub_n
bobcat/64: rsh1add_n 1.27 addlsh1_n
glmgentoo64/64: rsh1add_n 1.33 addlsh1_n
slmgentoo64/64: rsh1add_n 1.33 addlsh1_n
tinker/32: rsh1add_n 1.33 addlsh1_n
beagle/32: rsh1add_n 1.34 addlsh1_n
glmgentoo64/64: rsh1sub_n 1.33 addlsh1_n
slmgentoo64/64: rsh1sub_n 1.33 addlsh1_n
tinker/32: rsh1sub_n 1.34 addlsh1_n
beagle/32: rsh1sub_n 1.36 addlsh1_n
g5/32: sbpi1_bdiv_r 1.27 mul_basecase
g5/mode64: sbpi1_bdiv_r 1.34 mul_basecase
slmgentoo64/32: sbpi1_bdiv_r 1.35 mul_basecase
gege/32: sbpi1_bdiv_r 1.40 mul_basecase
nhmgentoo64/64: sbpi1_bdiv_r 1.43 mul_basecase
k10gentoo64/32: sbpi1_bdiv_r 1.44 mul_basecase
glmgentoo64/32: sbpi1_bdiv_r 1.52 mul_basecase
pnrgentoo64/64: sbpi1_bdiv_r 1.55 mul_basecase
nhmgentoo64/32: sbpi1_bdiv_r 1.57 mul_basecase
cnrgentoo64/64: sbpi1_bdiv_r 1.58 mul_basecase
cnrgentoo64/32: sbpi1_bdiv_r 1.59 mul_basecase
jaggentoo64/32: sbpi1_bdiv_r 1.59 mul_basecase
pilegentoo64/32: sbpi1_bdiv_r 1.59 mul_basecase
pirigentoo64/32: sbpi1_bdiv_r 1.59 mul_basecase
pnrgentoo64/32: sbpi1_bdiv_r 1.59 mul_basecase
labrador/32: sbpi1_bdiv_r 1.6 mul_basecase
tambo/32: sbpi1_bdiv_r 1.6 mul_basecase
zengentoo64/32: sbpi1_bdiv_r 1.60 mul_basecase
bullgentoo64/32: sbpi1_bdiv_r 1.62 mul_basecase
excagentoo64/32: sbpi1_bdiv_r 1.63 mul_basecase
cough/32: sbpi1_bdiv_r 1.65 mul_basecase
bobcat/32: sbpi1_bdiv_r 1.69 mul_basecase
element/32: sbpi1_bdiv_r 1.70 mul_basecase
tinker/32: sbpi1_bdiv_r 1.76 mul_basecase
gcc135/mode64: sbpi1_bdiv_r 1.80 mul_basecase
paddy/32: sbpi1_bdiv_r 1.89 mul_basecase
beagle/32: sbpi1_bdiv_r 1.92 mul_basecase
skygentoo64/32: sbpi1_bdiv_r 1.93 mul_basecase
yubel2/32: sbpi1_bdiv_r 1.93 mul_basecase
parks/32: sbpi1_bdiv_r 2 mul_basecase
sbrgentoo64/32: sbpi1_bdiv_r 2.05 mul_basecase
bwlgentoo64/32: sbpi1_bdiv_r 2.07 mul_basecase
hwlgentoo64/32: sbpi1_bdiv_r 2.11 mul_basecase
odc1/32: sqr_basecase 0.65 mul_basecase
slmgentoo64/32: sqr_basecase 0.65 mul_basecase
bullgentoo64/32: sqr_basecase 0.66 mul_basecase
g5/mode32: sqr_basecase 0.66 mul_basecase
gcc135/mode64: sqr_basecase 0.66 mul_basecase
gege/32: sqr_basecase 0.66 mul_basecase
k10gentoo64/64: sqr_basecase 0.66 mul_basecase
nhmgentoo64/32: sqr_basecase 0.66 mul_basecase
bwlgentoo64/32: sqr_basecase 0.67 mul_basecase
gcc115/64: sqr_basecase 0.67 mul_basecase
gcc115/64: sqr_basecase 0.67 mul_basecase
glmgentoo64/64: sqr_basecase 0.67 mul_basecase
beagle/32: sqr_basecase 0.68 mul_basecase
excagentoo64/32: sqr_basecase 0.68 mul_basecase
glmgentoo64/32: sqr_basecase 0.68 mul_basecase
paddy/32: sqr_basecase 0.68 mul_basecase
skygentoo64/32: sqr_basecase 0.68 mul_basecase
cough/32: sqr_basecase 0.69 mul_basecase
cough/64: sqr_basecase 0.69 mul_basecase
hwlgentoo64/32: sqr_basecase 0.69 mul_basecase
yubel2/32: sqr_basecase 0.69 mul_basecase
cnrgentoo64/32: sqr_basecase 0.70 mul_basecase
pnrgentoo64/32: sqr_basecase 0.70 mul_basecase
sbrgentoo64/32: sqr_basecase 0.70 mul_basecase
gcc1-power7/mode64: sqr_basecase 0.72 mul_basecase
tambo/32: sqr_basecase 0.72 mul_basecase
zengentoo64/32: sqr_basecase 0.72 mul_basecase
element/32: sqr_basecase 0.73 mul_basecase
g5/32: sqr_basecase 0.73 mul_basecase
parks/32: sqr_basecase 0.73 mul_basecase
pirigentoo64/32: sqr_basecase 0.73 mul_basecase
pirigentoo64/64: sqr_basecase 0.74 mul_basecase
labrador/32: sqr_basecase 0.78 mul_basecase
bobcat/32: sqr_basecase 0.82 mul_basecase
gege/64: sqr_basecase 0.83 mul_basecase
bobcat/64: sublsh1_n 1.32 addlsh1_n
element/32: submul_1.3 1.26 addmul_1.3
cnrgentoo64/32: submul_1.3 1.31 addmul_1.3
pnrgentoo64/32: submul_1.3 1.32 addmul_1.3