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Support retriving rotation matrix

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Jaby 2024-01-31 22:22:25 -05:00
parent 9246b077ad
commit d361c5504c
1 changed files with 20 additions and 0 deletions
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20
include/PSX/GTE/gte.hpp
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@ -41,6 +41,26 @@ namespace JabyEngine {
__asm__ volatile("ctc2 $14, $4" :: "r"(&matrix) : "$12", "$13", "$14"); __asm__ volatile("ctc2 $14, $4" :: "r"(&matrix) : "$12", "$13", "$14");
} }
static MATRIX get_rot_matrix() {
MATRIX matrix = {0};
// TODO: v why is this needed?
// TODO: v what is this? v
// TODO: v v what exactly is this register?
__asm__ volatile("cfc2 $12, $0" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
__asm__ volatile("cfc2 $13, $1" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
__asm__ volatile("sw $12, 0(%0)" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
__asm__ volatile("sw $13, 4(%0)" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
__asm__ volatile("cfc2 $12, $2" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
__asm__ volatile("cfc2 $13, $3" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
__asm__ volatile("cfc2 $14, $4" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
__asm__ volatile("sw $12, 8(%0)" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
__asm__ volatile("sw $13, 12(%0)" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
__asm__ volatile("sw $14, 16(%0)" :: "r"(&matrix) : "$12", "$13", "$14", "memory");
return matrix;
}
/* /*
SetTransMatrix SetTransMatrix