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| author | John Wilbert M. Villamor <lameguy64@gmail.com> | 2019-06-23 07:42:16 +0800 |
|---|---|---|
| committer | John Wilbert M. Villamor <lameguy64@gmail.com> | 2019-06-23 07:42:16 +0800 |
| commit | 7be9178c0f9b0e698a305ecc5c0c41fcc596a4fc (patch) | |
| tree | e98c627e1da5c764563774b89b0c06d7ac5ad0a4 /libpsn00b/psxgte/squareroot.s | |
| parent | ae9e545c3ed33d39ce21ae13ceb8337fa34901b8 (diff) | |
| download | psn00bsdk-7be9178c0f9b0e698a305ecc5c0c41fcc596a4fc.tar.gz | |
LibPSn00b officially v0.10b, added psxsio library, better DrawSync() and VSync(), better reference manual.
Diffstat (limited to 'libpsn00b/psxgte/squareroot.s')
| -rw-r--r-- | libpsn00b/psxgte/squareroot.s | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/libpsn00b/psxgte/squareroot.s b/libpsn00b/psxgte/squareroot.s index 71f40a9..a262d94 100644 --- a/libpsn00b/psxgte/squareroot.s +++ b/libpsn00b/psxgte/squareroot.s @@ -5,6 +5,8 @@ .section .text +# Implementation based from Sony libs + .global SquareRoot12 .type SquareRoot12, @function SquareRoot12: @@ -12,7 +14,7 @@ SquareRoot12: nop nop mfc2 $v0, C2_LZCR - beq $v0, 32, $bad_sqr12 + beq $v0, 32, .Lbad_sqr12 nop andi $t0, $v0, 0x1 addiu $v1, $0 , -2 @@ -21,15 +23,15 @@ SquareRoot12: sub $t1, $t2 sra $t1, 1 addi $t3, $t2, -24 - bltz $t3, $value_less12 + bltz $t3, .Lvalue_less12 nop sllv $t4, $a0, $t3 - b $value_greater12 -$value_less12: + b .Lvalue_greater12 +.Lvalue_less12: addiu $t3, $0 , 24 sub $t3, $t2 srav $t4, $a0, $t3 -$value_greater12: +.Lvalue_greater12: addi $t4, -64 sll $t4, 1 la $t5, sqrt_table @@ -37,18 +39,18 @@ $value_greater12: lh $t5, 0($t5) nop - bltz $t1, $1594c + bltz $t1, .L1594c nop jr $ra sllv $v0, $t5, $t1 -$1594c: +.L1594c: sub $t1, $0 , $t1 jr $ra srl $v0, $t5, $t1 -$bad_sqr12: +.Lbad_sqr12: jr $ra move $v0, $0 @@ -60,7 +62,7 @@ SquareRoot0: nop nop mfc2 $v0, C2_LZCR - beq $v0, 32, $bad_sqr + beq $v0, 32, .Lbad_sqr nop andi $t0, $v0, 0x1 addiu $v1, $0 , -2 @@ -69,15 +71,15 @@ SquareRoot0: sub $t1, $t2 sra $t1, 1 addi $t3, $t2, -24 - bltz $t3, $value_less + bltz $t3, .Lvalue_less nop sllv $t4, $a0, $t3 - b $value_greater -$value_less: + b .Lvalue_greater +.Lvalue_less: addiu $t3, $0 , 24 sub $t3, $t2 srav $t4, $a0, $t3 -$value_greater: +.Lvalue_greater: addi $t4, -64 sll $t4, 1 la $t5, sqrt_table @@ -87,7 +89,7 @@ $value_greater: sllv $t5, $t5, $t1 jr $ra srl $v0, $t5, 12 -$bad_sqr: +.Lbad_sqr: jr $ra move $v0, $0 |