2 * (C) GraÅžvydas "notaz" Ignotas, 2011
4 * This work is licensed under the terms of any of these licenses
6 * - GNU GPL, version 2 or later.
7 * - GNU LGPL, version 2.1 or later.
8 * See the COPYING file in the top-level directory.
23 @ approximate gteMAC|123 flags
24 @ in: rr 123 as gteMAC|123
26 .macro do_mac_flags rr1 rr2 rr3
28 orrvs lr, #(1<<31)|(1<<27)
30 orrvs lr, #(1<<31)|(1<<26)
32 orrvs lr, #(1<<31)|(1<<25)
33 cmn \rr1, #1 @ same as adds ...
41 @ approximate 3x gteMACn flags
42 @ in: rr 123 as 3 instances gteMACn, *flags
44 .macro do_mac_flags3x rr1 rr2 rr3 nflags pflags
49 cmn \rr1, #1 @ adds ...
55 @ approximate signed gteIR|123 [32] flags
56 @ in: rr 123 as gteIR|123
58 .macro do_irs_flags rr1 rr2 rr3
60 cmn r2, \rr1, lsl #16 @ adds ...
61 rsbvcs r3, r2, \rr1, lsl #16
62 orrvs lr, #(1<<31)|(1<<24) @ IR1/limB1
64 rsbvcs r3, r2, \rr2, lsl #16
66 orrvs lr, #(1<<23) @ IR2/limB2
68 subvcs r3, r2, \rr3, lsl #16
69 orrvs lr, #(1<<22) @ IR3/limB3
74 * RTPS/RTPT register map:
76 * q | d | c code / phase 1 phase 2 scratch
77 * 0 0 gteR1* [s16] gteMAC3 = gteMAC3 \ v=0 *
78 * 1 gteR2* gteIR1-3 = gteIR1-3 / *
79 * 1 2 gteR3* gteMAC3 = gteMAC3 \ v=1
80 * 3 * gteIR1-3 = gteIR1-3 /
81 * 2 4 gteTRX<<12 [s64] gteOFX [s64] gteMAC3 \ v=2
82 * 5 gteTRY<<12 gteOFY [s64] gteIR1-3 /
83 * 3 6 gteTRZ<<12 gteDQA [s64] min gteMAC|12 v=012
84 * 7 0 gteDQB [s64] max gteMAC|12
85 * 4 8 VXYZ(v) / gteMAC1,2 [s32] min gteIR|123
86 * 9 * / gteMAC3 max gteIR|123
87 * 5 10 gteIR1-3 [s16] gteIR1-3 v=2 quotients 12
89 * 6 12 gteH (adj. for cmp)
90 * 13 gteH (float for div)
96 @ load gteR*, gteTR* and gteH (see map above), clear q15
101 vldmia r3, {d0-d2} @ gteR* [16*9]
102 add r3, r0, #4*(32+5)
103 vldmia r3, {d4-d5} @ gteTR*
105 vshl.i64 d2, d2, #32 @ |
106 add r3, r0, #4*(32+26)
107 vld1.32 d11[0], [r3] @ gteH
108 vsri.u64 d2, d1, #32 @ |
109 vshll.s32 q3, d5, #12 @ gteTRZ
110 vshll.s32 q2, d4, #12 @ gteTR|XY
111 vshl.i64 d1, d1, #16 @ |
112 vmovl.s16 q6, d11 @ gteH
113 vsri.u64 d1, d0, #48 @ |
116 @ do RTP* gteMAC* calculation
117 @ in: gteR*, gteTR* as in map, d8 - VXYZ, r12 - 0
118 @ out: d8,d9 - gteMAC|123, d10 - gteIR|123
123 vmull.s16 q10, d2, d8
127 vadd.s64 d16, d17 @ d16=d0.16[2]*d8.16[2], as
128 vadd.s64 d18, d19 @ d8[3]==0, so won't affect
129 vadd.s64 d20, d21 @ QC
133 vqshrn.s64 d8, q8, #12 @ gteMAC1
134 vqshrn.s64 d18, q9, #12 @ gteMAC2
135 vqshrn.s64 d9, q10, #12 @ gteMAC3
136 vsli.u64 d8, d18, #32 @ gteMAC|12
138 vqmovn.s32 d10, q4 @ gteIR|123; losing 2 cycles?
141 .global gteRTPS_neon @ r0=CP2 (d,c),
145 @ fmrx r4, fpscr @ vmrs? at least 40 cycle hit
146 movw r1, #:lower16:scratch
147 movt r1, #:upper16:scratch
152 vldmia r0, {d8} @ VXYZ(0)
153 vmov.16 d8[3], r12 @ kill unused upper vector
159 vst1.32 d9[0], [r3] @ wb gteMAC|123
160 vmovl.s16 q9, d10 @ expand gteIR|123
162 add r3, r0, #4*17 @ gteSZ*
163 vldmia r3, {q7} @ d14,d15 gteSZ|123x
164 vmov.i32 d28, #0xffff @ 0xffff[32]
165 vmax.s32 d11, d9, d31
166 vshr.s32 d16, d12, #1 @ | gteH/2 (adjust for cmp)
168 vmin.u32 d11, d28 @ saturate to 0..0xffff limD/fSZ3
169 vshl.u32 d13, d12, #16 @ | preparing gteH
174 vsli.u64 d15, d11, #32 @ new gteSZ|0123 in q7
175 vclt.u32 d16, d16, d11 @ gteH/2 < fSZ3?
177 add r3, r0, #4*(32+24)
178 vld1.32 d4, [r3] @ || gteOF|XY
179 add r3, r0, #4*(32+27)
180 vld1.32 d6, [r3] @ || gteDQ|AB
183 vmovl.s32 q2, d4 @ || gteOF|XY [64]
184 vmax.u32 d11, d26 @ make divisor 1 if not
185 vmovl.s32 q3, d6 @ || gteDQ|AB [64]
186 add r3, r0, #4*16 @ | gteSZ*
187 vstmia r3, {q7} @ | d14,d15 gteSZ|123x
189 vcvt.f32.u32 d13, d13 @ gteH (float for div)
190 vcvt.f32.u32 d11, d11 @ divisor
192 @ divide.. it's not worth messing with reciprocals here
193 @ just for 1 value, let's just use VFP divider here
194 vdiv.f32 s22, s26, s22
196 vcvt.u32.f32 d11, d11 @ quotient
198 @ while NEON's busy we calculate some flags on ARM
201 ldmia r3, {r4-r6} @ gteMAC|123
203 vst1.32 d11, [r1] @ wb quotient for flags (pre-limE)
206 do_mac_flags r4, r5, r6
208 vshr.u32 d11, #15 @ quotient (limE)
211 ldmia r3, {r4-r6} @ gteIR|123
212 do_irs_flags r4, r5, r6
214 vmlal.s32 q2, d18, d11[0]@ gteOF|XY + gteIR|12 * quotient
216 vld1.32 d16, [r3] @ || load fS|XY12, new 01
217 vqmovn.s64 d18, q2 @ saturate to 32
218 vmull.s32 q10, d6, d11[0]@ | d20 = gteDQA * quotient
219 vqshl.s32 d19, d18, #5 @ 11bit precision
221 ldr r4, [r1] @ quotient
224 vst1.32 d18, [r2]! @ || writeback fS|XY2 before limG
225 vst1.32 d19, [r2] @ || and after 11bit saturation
229 orrne lr, #(1<<18) @ fSZ (limD)
231 vshr.s32 d18, d19, #16+5@ can't vqshrn because of insn
232 vadd.s64 d20, d7 @ | gteDQB + gteDQA * quotient
233 vmovn.s32 d18, q9 @ fS|XY2 [s16]
235 vqshrn.s64 d20, q10, #12 @ | gteMAC0
237 vst1.32 d16, [r3]! @ writeback fS|XY01
238 vst1.32 d18[0], [r3] @ ...2
240 vst1.32 d20[0], [r3] @ gteMAC0
242 vmax.s32 d21, d20, d31
243 vmov.i32 d22, #0x1000
246 vst1.16 d21[0], [r3] @ gteIR0
250 orrne lr, #(1<<17) @ limE
252 ldmia r1, {r4-r7} @ fS|XY2 before limG, after 11bit sat
254 addvcs r3, r6, #1<<21
255 orrvs lr, #(1<<14) @ limG1
258 addvcs r3, r7, #1<<21
259 orrvs lr, #(1<<13) @ limG2
263 orrvs lr, #(1<<16) @ F
269 ldr r4, [r0, #4*24] @ gteMAC0
273 orrvs lr, #(1<<16) @ F
276 orrvs lr, #(1<<15) @ F
279 orrhi lr, #(1<<12) @ limH
281 str lr, [r0, #4*(32+31)] @ gteFLAG
284 .size gteRTPS_neon, .-gteRTPS_neon
288 .global gteRTPT_neon @ r0=CP2 (d,c),
292 movw r1, #:lower16:scratch
293 movt r1, #:upper16:scratch
298 vmov.i32 d22, #0x7fffffff
299 vmov.i32 d23, #0x80000000
303 vldmia r2!, {d8} @ VXYZ(v)
304 vmov.16 d8[3], r12 @ kill unused upper vector
307 vmin.s32 d22, d8 @ min gteMAC|12
308 vmax.s32 d23, d8 @ max gteMAC|12
310 vst1.32 {d9,d10}, [r1, :64]!
313 vst1.32 {d22,d23}, [r1, :64]! @ min/max gteMAC|12 (for flags)
317 vldmia r1, {d0-d3} @ note: d4,d5 is for gteOF|XY
319 vmov d20, d0 @ gteMAC3 v=0
320 vmin.s16 d24, d1, d3 @ | find min IR
321 vshr.s32 d22, d12, #1 @ || gteH/2 (adjust for cmp)
322 vmax.s16 d25, d1, d3 @ | .. also max, for flag gen
323 vsli.u64 d20, d2, #32 @ gteMAC3 v=1
324 vmov d21, d9 @ ... v=2
326 vmov.i32 q14, #0xffff @ 0xffff[32]
329 vdup.32 q11, d22[0] @ gteH/2
330 vmin.u32 q10, q14 @ saturate to 0..0xffff limD/fSZ(v)
331 vmin.s16 d24, d10 @ | find min/max IR
332 vmax.s16 d25, d10 @ |
334 add r3, r0, #4*19 @ ||
335 vld1.32 d14[0], [r3] @ || gteSZ3
337 vclt.u32 q11, q11, q10 @ gteH/2 < fSZ(v)?
339 vst1.32 d20, [r3]! @ | writeback fSZ(v)
341 vst1.32 d21[0], [r3] @ |
342 vmax.u32 q10, q11, q13 @ make divisor 1 if not
344 vstmia r3, {q12} @ min/max IR for flags
345 vcvt.f32.u32 q10, q10
346 vshl.u32 d13, d12, #16 @ | preparing gteH
348 @ while NEON's busy we calculate some flags on ARM
351 ldmia r2, {r4-r7} @ min/max gteMAC|12
353 orrvs lr, #(1<<31)|(1<<27)
355 orrvs lr, #(1<<31)|(1<<26)
360 ldr r4, [r1, #0] @ gteMAC3 v=0
361 ldr r5, [r1, #8*2] @ ... v=1
362 ldr r6, [r1, #8*4] @ ... v=2
364 add r3, r0, #4*(32+24)
365 vld1.32 d4, [r3] @ || gteOF|XY
366 add r3, r0, #4*(32+27)
367 vld1.32 d6, [r3] @ || gteDQ|AB
371 vrecpe.f32 q11, q10 @ inv
372 vmovl.s32 q2, d4 @ || gteOF|XY [64]
373 vmovl.s32 q3, d6 @ || gteDQ|AB [64]
374 vrecps.f32 q12, q10, q11 @ step
375 vcvt.f32.u32 d13, d13 @ | gteH (float for div)
376 vmul.f32 q11, q12, q11 @ better inv
378 vst1.32 d14[0], [r3] @ gteSZ0 = gteSZ3
379 vdup.32 q13, d13[0] @ |
380 @ vrecps.f32 q12, q10, q11 @ step
381 @ vmul.f32 q11, q12, q11 @ better inv
382 vmul.f32 q10, q13, q11 @ result
384 vmovl.s32 q2, d4 @ || gteOF|XY [64]
385 vmovl.s32 q3, d6 @ || gteDQ|AB [64]
386 vcvt.f32.u32 d13, d13 @ | gteH (float for div)
387 vdup.32 q13, d13[0] @ |
389 vst1.32 d14[0], [r3] @ gteSZ0 = gteSZ3
392 vmov q0, q10 @ to test against C code
400 do_mac_flags3x r4, r5, r6, (1<<31)|(1<<25), (1<<27) @ MAC3
404 ldmia r4, {r7,r8,r10,r11} @ min/max IR
408 orrne lr, #(1<<18) @ fSZ (limD)
410 @ vadd.f32 q10, q @ adjust for vcvt rounding mode
412 vmovl.s16 q9, d1 @ expand gteIR|12 v=0
413 vmovl.s16 q10, d3 @ expand gteIR|12 v=1
415 vstmia r6, {q8} @ wb quotients for flags (pre-limE)
417 vmovl.s16 q11, d10 @ expand gteIR|12 v=2
418 vshr.u32 q8, #15 @ quotients (limE)
421 vdup.32 d26, d17[0] @ quotient (dup)
423 @ flags for minIR012 (r7,r8), maxIR012 (r10,r11)
428 orrvs lr, #(1<<23) @ IR2/limB2
429 rsbs r2, r4, r7, lsl #16
430 cmnvc r4, r10, lsl #16
431 orrvs lr, #(1<<31)|(1<<24) @ IR1/limB1
432 rsbs r2, r4, r8, lsl #16
433 cmnvc r4, r11, lsl #16
434 orrvs lr, #(1<<22) @ IR3/limB3
436 vmull.s32 q9, d18, d24 @ gteIR|12 * quotient v=0
437 vmull.s32 q10, d20, d25 @ ... v=1
438 vmull.s32 q11, d22, d26 @ ... v=2
439 vadd.s64 q9, q2 @ gteOF|XY + gteIR|12 * quotient
440 vadd.s64 q10, q2 @ ... v=1
441 vadd.s64 q11, q2 @ ... v=2
442 vqmovn.s64 d18, q9 @ saturate to 32 v=0
443 vqmovn.s64 d19, q10 @ ... v=1
444 vqmovn.s64 d20, q11 @ ... v=2
445 vmin.s32 d14, d18, d19 @ || find min/max fS|XY(v) [32]
446 vmax.s32 d15, d18, d19 @ || for flags
449 vqshl.s32 q11, q9, #5 @ 11bit precision, v=0,1
450 vqshl.s32 d24, d20, #5 @ ... v=2
451 vmull.s32 q13, d6, d17 @ | gteDQA * quotient v=2
452 vpmin.s32 d16, d14, d31 @ || also find min/max in pair
453 vpmax.s32 d17, d15, d31 @ ||
454 vshr.s32 q11, #16+5 @ can't vqshrn because of insn
455 vshr.s32 d24, #16+5 @ encoding doesn't allow 21 :(
456 vqshl.s32 q7, #5 @ || min/max pairs shifted
457 vsli.u64 d16, d17, #32 @ || pack in-pair min/max
458 vadd.s64 d26, d7 @ | gteDQB + gteDQA * quotient
459 vmovn.s32 d12, q11 @ fS|XY(v) [s16] v=0,1
460 vmovn.s32 d13, q12 @ 3
461 vstmia r1, {d14-d16} @ || other cacheline than quotients
463 vst1.32 d12, [r3]! @ writeback fS|XY v=0,1
466 vqshrn.s64 d26, q13, #12 @ | gteMAC0
467 vmovl.u16 q5, d10 @ expand gteIR|123 v=2
469 vmov.i32 d13, #0x1000
470 vmax.s32 d12, d26, d30
473 vst1.32 d26[0], [r3]! @ gteMAC0
474 vst1.32 d8, [r3]! @ gteMAC123 (last iteration)
477 vmin.s32 d12, d13 @ | gteIR0
479 ldmia r6, {r4-r6} @ quotients
485 vst1.32 d12[0], [r3]! @ gteIR0
486 vst1.32 d10, [r3]! @ gteIR12
487 vst1.32 d11[0], [r3] @ ..3
490 orrne lr, #(1<<31) @ limE
491 orrne lr, #(1<<17) @ limE
493 subs r2, r4, #1<<21 @ min fSX
494 addvcs r3, r6, #1<<21 @ max fSX
495 orrvs lr, #(1<<31) @ limG1
497 subs r2, r5, #1<<21 @ min fSY
498 addvcs r3, r7, #1<<21 @ max fSY
499 orrvs lr, #(1<<31) @ limG2
502 orrvs lr, #(1<<31) @ F
505 orrvs lr, #(1<<31) @ F
507 ldr r4, [r0, #4*24] @ gteMAC0
512 orrvs lr, #(1<<31) @ F
515 orrvs lr, #(1<<31) @ F
517 orrhi lr, #(1<<12) @ limH
519 str lr, [r0, #4*(32+31)] @ gteFLAG
522 .size gteRTPT_neon, .-gteRTPT_neon
526 @ the name is misnormer, this doesn't use NEON but oh well..
527 .global gteNCLIP_neon @ r0=CP2 (d,c),
536 sub r12, r4, r5 @ 3: gteSY0 - gteSY1
537 sub r5, r5, r6 @ 1: gteSY1 - gteSY2
539 smull r1, r5, r1, r5 @ RdLo, RdHi
540 sub r6, r4 @ 2: gteSY2 - gteSY0
545 smlal r1, r5, r3, r12
551 movtgt lr, #((1<<31)|(1<<16))>>16
552 mvngt r1, #1<<31 @ maxint
554 movmi r1, #1<<31 @ minint
557 str lr, [r0, #4*(32+31)] @ gteFLAG
560 .size gteNCLIP_neon, .-gteNCLIP_neon
563 @ vim:filetype=armasm