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fixed : Traduction en ASM des dernières fonctions "simples"

This commit is contained in:
attilavs2 2024-02-11 11:05:54 +01:00
parent c217e69ce8
commit cd30c37210
3 changed files with 41 additions and 15 deletions
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RaycasterGame.g3a
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28
src/fixed.S
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@ -15,6 +15,9 @@
.global _feasein
.type _feasein, @function
.global _fease
.type _fease, @function
_fmul:
dmuls.l r4, r5
sts MACH, r1
@ -37,7 +40,7 @@ _fceil:
shad r1, r0
_fround:
mov.l .fround_constant, r0
mov.l .half_constant, r0
add r4, r0
mov #-16, r1
rts
@ -51,5 +54,26 @@ _feasein:
rts
xtrct r1, r0
.fround_constant:
_fease:
mov.l .half_constant, r1
cmp/gt r1, r4
bf fease_sml
nop
mov #-1, r2
extu.w r2, r2
sub r2, r4
mov r4, r5
bra _fmul
mov #-1, r3
shad r3, r0
rts
sub r2, r0
fease_sml:
mov r4, r5
bra _fmul
mov #-1, r3
rts
sub r2, r0
.half_constant:
.long 0x8000

28
src/fixed.h
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@ -11,7 +11,7 @@ typedef int32_t fixed_t;
/* Standard arithmetic. */
//GCC complained when in inline functions
#define ffloor(f) ((f) >> 16)
#define ffloor(f) ((int)(f) >> 16)
#ifndef FXCG50
@ -42,6 +42,17 @@ static inline fixed_t feasein(fixed_t x)
return fmul(x, x);
}
static inline fixed_t fease(fixed_t x)
{
if(x <= fix(0.5)) {
return 2 * fmul(x, x);
}
else {
x = fix(1) - x;
return fix(1) - 2 * fmul(x, x);
}
}
#endif
#ifdef FXCG50
@ -53,7 +64,9 @@ extern inline int fceil(fixed_t f);
extern inline int fround(fixed_t f);
inline fixed_t feasein(fixed_t x);
extern inline fixed_t feasein(fixed_t x);
extern inline fixed_t fease(fixed_t x);
#endif
@ -90,14 +103,3 @@ static inline double f2int(fixed_t f)
{
return (int)f / 65536;
}
static inline fixed_t fease(fixed_t x)
{
if(x <= fix(0.5)) {
return 2 * fmul(x, x);
}
else {
x = fix(1) - x;
return fix(1) - 2 * fmul(x, x);
}
}