mirror of https://github.com/lianthony/NT4.0
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
1.4 KiB
45 lines
1.4 KiB
// convert a 32 bit integer into 64 bit double
|
|
|
|
.globl ..__utof
|
|
|
|
// build code table
|
|
|
|
.pdata
|
|
.ualong ..__utof,__utof.e,0,0,__utof.b
|
|
|
|
// define the function
|
|
|
|
.text
|
|
..__utof:
|
|
.function ..__utof
|
|
__utof.b:
|
|
addis r4,r0,0x4330 // make a 2 to 52 exponent for the double
|
|
stw r3,-8(sp) // store the int into the last four bytes of the
|
|
// double
|
|
stw r4,-4(sp) // store the 2 to 52 exponent part for the double
|
|
lfd f1,-8(sp) // load double format into f1
|
|
addis r3,r0,0x5980 // load float format of number 2 to 52 with
|
|
// inverted sign bit too
|
|
stw r3,-8(sp)
|
|
lfs f0,-8(sp) // load float format into f0
|
|
fsub f1,f1,f0 // substract f0 from f1
|
|
frsp f1,f1 // convert to single precision
|
|
blr
|
|
__utof.e:
|
|
|
|
|
|
.debug$S
|
|
.ualong 1
|
|
|
|
.uashort 15
|
|
.uashort 0x9 # S_OBJNAME
|
|
.ualong 0
|
|
.byte 8, "utof.obj"
|
|
|
|
.uashort 24
|
|
.uashort 0x1 # S_COMPILE
|
|
.byte 0x42 # Target processor = PPC 604
|
|
.byte 3 # Language = ASM
|
|
.byte 0
|
|
.byte 0
|
|
.byte 17, "PowerPC Assembler"
|