diff options
Diffstat (limited to 'html/mu_instructions.html')
| -rw-r--r-- | html/mu_instructions.html | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/html/mu_instructions.html b/html/mu_instructions.html index 8f21aa08..3f25242f 100644 --- a/html/mu_instructions.html +++ b/html/mu_instructions.html @@ -351,10 +351,19 @@ var/xreg <span class="SpecialChar"><-</span> convert var2/reg2 => <spa var/xreg <span class="SpecialChar"><-</span> convert var2 => <span class="Constant">"f3 0f 2a/convert-to-float *(ebp+"</span> var2.stack-offset <span class="Constant">") "</span> xreg <span class="Constant">"/x32"</span> var/xreg <span class="SpecialChar"><-</span> convert *var2/reg2 => <span class="Constant">"f3 0f 2a/convert-to-float *"</span> reg2 <span class="Constant">" "</span> xreg <span class="Constant">"/x32"</span> +Converting floats to ints performs rounding by default. (We don't mess with the +MXCSR control register.) + var/reg <span class="SpecialChar"><-</span> convert var2/xreg2 => <span class="Constant">"f3 0f 2d/convert-to-int %"</span> xreg2 <span class="Constant">" "</span> reg <span class="Constant">"/r32"</span> var/reg <span class="SpecialChar"><-</span> convert var2 => <span class="Constant">"f3 0f 2d/convert-to-int *(ebp+"</span> var2.stack-offset <span class="Constant">") "</span> reg <span class="Constant">"/r32"</span> var/reg <span class="SpecialChar"><-</span> convert *var2/reg2 => <span class="Constant">"f3 0f 2d/convert-to-int *"</span> reg2 <span class="Constant">" "</span> reg <span class="Constant">"/r32"</span> +There's a separate instruction for truncating the fractional part. + +var/reg <span class="SpecialChar"><-</span> truncate var2/xreg2 => <span class="Constant">"f3 0f 2c/truncate-to-int %"</span> xreg2 <span class="Constant">" "</span> reg <span class="Constant">"/r32"</span> +var/reg <span class="SpecialChar"><-</span> truncate var2 => <span class="Constant">"f3 0f 2c/truncate-to-int *(ebp+"</span> var2.stack-offset <span class="Constant">") "</span> reg <span class="Constant">"/r32"</span> +var/reg <span class="SpecialChar"><-</span> truncate *var2/reg2 => <span class="Constant">"f3 0f 2c/truncate-to-int *"</span> reg2 <span class="Constant">" "</span> reg <span class="Constant">"/r32"</span> + There are no instructions accepting floating-point literals. To obtain integer literals in floating-point registers, copy them to general-purpose registers and then convert them to floating-point. |