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Diffstat (limited to 'libpcsxcore/gte_arm.S')
| -rw-r--r-- | libpcsxcore/gte_arm.S | 590 |
1 files changed, 590 insertions, 0 deletions
diff --git a/libpcsxcore/gte_arm.S b/libpcsxcore/gte_arm.S new file mode 100644 index 0000000..8700f69 --- /dev/null +++ b/libpcsxcore/gte_arm.S @@ -0,0 +1,590 @@ +/* + * (C) GraÅžvydas "notaz" Ignotas, 2011 + * + * This work is licensed under the terms of GNU GPL version 2 or later. + * See the COPYING file in the top-level directory. + */ + +/* .equiv HAVE_ARMV7, 1 */ + +.text +.align 2 + +.macro sgnxt16 rd rs +.if HAVE_ARMV7 + sxth \rd, \rs +.else + lsl \rd, \rs, #16 + asr \rd, \rd, #16 +.endif +.endm + +@ prepare work reg for ssatx +@ in: wr reg, bit to saturate to +.macro ssatx_prep wr bit +.if !HAVE_ARMV7 + mov \wr, #(1<<(\bit-1)) +.endif +.endm + +.macro ssatx rd wr bit +.if HAVE_ARMV7 + ssat \rd, #\bit, \rd +.else + cmp \rd, \wr + subge \rd, \wr, #1 + cmn \rd, \wr + rsblt \rd, \wr, #0 +.endif +.endm + +@ prepare work reg for ssatx0 (sat to 0..2^(bit-1)) +@ in: wr reg, bit to saturate to +.macro ssatx0_prep wr bit + mov \wr, #(1<<(\bit-1)) +.endm + +.macro ssatx0 rd wr bit + cmp \rd, \wr + subge \rd, \wr, #1 + cmn \rd, #0 + movlt \rd, #0 +.endm + +.macro usat16_ rd rs +.if HAVE_ARMV7 + usat \rd, #16, \rs +.else + subs \rd, \rs, #0 + movlt \rd, #0 + cmp \rd, #0x10000 + movge \rd, #0x0ff00 + orrge \rd, #0x000ff +.endif +.endm + +.macro udiv_ rd rm rs + lsl \rm, #16 + clz \rd, \rs + lsl \rs, \rs, \rd @ shift up divisor + orr \rd, \rd, #1<<31 + lsr \rd, \rd, \rd +0: + cmp \rm, \rs + subcs \rm, \rs + adcs \rd, \rd, \rd + lsr \rs, #1 + bcc 0b +.endm + +.macro newton_step rcp den zero t1 t2 + umull \t2, \t1, \den, \rcp @ \t2 is dummy + sub \t1, \zero, \t1, lsl #2 + smlal \t2, \rcp, \t1, \rcp +.endm + +.macro udiv_newton rd rm rs t1 t2 t3 t4 + lsl \rd, \rm, #16 + clz \t1, \rs + mov \t2, #0 + lsl \rs, \t1 @ normalize for the algo + mov \rm, #0x4d000000 @ initial estimate ~1.2 + + newton_step \rm, \rs, \t2, \t3, \t4 + newton_step \rm, \rs, \t2, \t3, \t4 + newton_step \rm, \rs, \t2, \t3, \t4 + newton_step \rm, \rs, \t2, \t3, \t4 + + umull \t4, \rd, \rm, \rd + rsb \t2, \t1, #30 @ here t1 is 1..15 + mov \rd, \rd, lsr \t2 +.endm + +@ unsigned divide rd = rm / rs; 16.16 result +@ no div by 0 check +@ in: rm, rs +@ trash: rm rs t* +.macro udiv rd rm rs t1 t2 t3 t4 + @udiv_ \rd, \rm, \rs + udiv_newton \rd, \rm, \rs, \t1, \t2, \t3, \t4 +.endm + +@ calculate RTPS/RTPT MAC values +@ in: r0 context, r8,r9 VXYZ +@ out: r10-r12 MAC123 +@ trash: r1-r7 +.macro do_rtpx_mac + add r1, r0, #4*32 + add r2, r0, #4*(32+5) @ gteTRX + ldmia r1!,{r5-r7} @ gteR1*,gteR2* + ldmia r2, {r10-r12} + smulbb r2, r5, r8 @ gteR11 * gteVX0 + smultt r3, r5, r8 @ gteR12 * gteVY0 + smulbb r4, r6, r9 @ gteR13 * gteVZ0 + qadd r2, r2, r3 + asr r4, r4, #1 @ prevent oflow, lose a bit + add r3, r4, r2, asr #1 + add r10,r10,r3, asr #11 @ gteMAC1 + smultb r2, r6, r8 @ gteR21 * gteVX0 + smulbt r3, r7, r8 @ gteR22 * gteVY0 + smultb r4, r7, r9 @ gteR23 * gteVZ0 + ldmia r1!,{r5-r6} @ gteR3* + qadd r2, r2, r3 + asr r4, r4, #1 + add r3, r4, r2, asr #1 + add r11,r11,r3, asr #11 @ gteMAC2 + @ be more accurate for gteMAC3, since it's also a divider + smulbb r2, r5, r8 @ gteR31 * gteVX0 + smultt r3, r5, r8 @ gteR32 * gteVY0 + smulbb r4, r6, r9 @ gteR33 * gteVZ0 + qadd r2, r2, r3 + asr r3, r4, #31 @ expand to 64bit + adds r1, r2, r4 + adc r3, r2, asr #31 @ 64bit sum in r3,r1 + add r12,r12,r3, lsl #20 + add r12,r12,r1, lsr #12 @ gteMAC3 +.endm + + +.global gteRTPS_nf_arm @ r0=CP2 (d,c), +gteRTPS_nf_arm: + push {r4-r11,lr} + + ldmia r0, {r8,r9} @ VXYZ(0) + do_rtpx_mac + add r1, r0, #4*25 @ gteMAC1 + add r2, r0, #4*17 @ gteSZ1 + stmia r1, {r10-r12} @ gteMAC123 save + ldmia r2, {r3-r5} + add r1, r0, #4*16 @ gteSZ0 + add r2, r0, #4*9 @ gteIR1 + ssatx_prep r6, 16 + usat16_ lr, r12 @ limD + ssatx r10,r6, 16 + ssatx r11,r6, 16 + ssatx r12,r6, 16 + stmia r1, {r3-r5,lr} @ gteSZ* + ldr r3, [r0,#4*(32+26)] @ gteH + stmia r2, {r10,r11,r12} @ gteIR123 save + cmp r3, lr, lsl #1 @ gteH < gteSZ3*2 ? + mov r9, #1<<30 + bhs 1f +.if 1 + udiv r9, r3, lr, r1, r2, r6, r7 +.else + push {r0, r12} + mov r0, r3 + mov r1, lr + bl DIVIDE + mov r9, r0 + pop {r0, r12} +.endif +1: + ldrd r6, [r0,#4*(32+24)] @ gteOFXY + cmp r9, #0x20000 + add r1, r0, #4*12 @ gteSXY0 + movhs r9, #0x20000 + ldmia r1, {r2-r4} + /* quotient */ subhs r9, #1 + mov r2, r6, asr #31 + smlal r6, r2, r10, r9 + stmia r1!,{r3,r4} @ shift gteSXY + mov r3, r7, asr #31 + smlal r7, r3, r11, r9 + lsr r6, #16 + /* gteDQA, gteDQB */ ldrd r10,[r0, #4*(32+27)] + orr r6, r2, lsl #16 @ (gteOFX + gteIR1 * q) >> 16 + ssatx_prep r2, 11 + lsr r7, #16 + /* gteDQB + gteDQA * q */ mla r4, r10, r9, r11 + orr r7, r3, lsl #16 @ (gteOFY + gteIR2 * q) >> 16 + ssatx r6, r2, 11 @ gteSX2 + ssatx r7, r2, 11 @ gteSY2 + strh r6, [r1] + strh r7, [r1, #2] + str r4, [r0,#4*24] @ gteMAC0 + asrs r4, #12 + movmi r4, #0 + cmp r4, #0x1000 @ limH + movgt r4, #0x1000 + str r4, [r0,#4*8] @ gteIR0 + + pop {r4-r11,pc} + .size gteRTPS_nf_arm, .-gteRTPS_nf_arm + + +.global gteRTPT_nf_arm @ r0=CP2 (d,c), +gteRTPT_nf_arm: + ldr r1, [r0, #4*19] @ gteSZ3 + push {r4-r11,lr} + str r1, [r0, #4*16] @ gteSZ0 + mov lr, #0 + +rtpt_arm_loop: + add r1, r0, lr, lsl #1 + ldrd r8, [r1] @ VXYZ(v) + do_rtpx_mac + + ssatx_prep r6, 16 + usat16_ r2, r12 @ limD + add r1, r0, #4*25 @ gteMAC1 + ldr r3, [r0,#4*(32+26)] @ gteH + stmia r1, {r10-r12} @ gteMAC123 save + add r1, r0, #4*17 + ssatx r10,r6, 16 + ssatx r11,r6, 16 + ssatx r12,r6, 16 + str r2, [r1, lr] @ fSZ(v) + cmp r3, r2, lsl #1 @ gteH < gteSZ3*2 ? + mov r9, #1<<30 + bhs 1f +.if 1 + udiv r9, r3, r2, r1, r4, r6, r7 +.else + push {r0, r12, lr} + mov r0, r3 + mov r1, r2 + bl DIVIDE + mov r9, r0 + pop {r0, r12, lr} +.endif +1: cmp r9, #0x20000 + add r1, r0, #4*12 + movhs r9, #0x20000 + ldrd r6, [r0,#4*(32+24)] @ gteOFXY + /* quotient */ subhs r9, #1 + mov r2, r6, asr #31 + smlal r6, r2, r10, r9 + mov r3, r7, asr #31 + smlal r7, r3, r11, r9 + lsr r6, #16 + orr r6, r2, lsl #16 @ (gteOFX + gteIR1 * q) >> 16 + ssatx_prep r2, 11 + lsr r7, #16 + orr r7, r3, lsl #16 @ (gteOFY + gteIR2 * q) >> 16 + ssatx r6, r2, 11 @ gteSX(v) + ssatx r7, r2, 11 @ gteSY(v) + strh r6, [r1, lr]! + add lr, #4 + strh r7, [r1, #2] + cmp lr, #12 + blt rtpt_arm_loop + + ldrd r4, [r0, #4*(32+27)] @ gteDQA, gteDQB + add r1, r0, #4*9 @ gteIR1 + mla r3, r4, r9, r5 @ gteDQB + gteDQA * q + stmia r1, {r10,r11,r12} @ gteIR123 save + + str r3, [r0,#4*24] @ gteMAC0 + asrs r3, #12 + movmi r3, #0 + cmp r3, #0x1000 @ limH + movgt r3, #0x1000 + str r3, [r0,#4*8] @ gteIR0 + + pop {r4-r11,pc} + .size gteRTPT_nf_arm, .-gteRTPT_nf_arm + + +@ note: not std calling convention used +@ r0 = CP2 (d,c) (must preserve) +@ r1 = needs_shift12 +@ r4,r5 = VXYZ(v) packed +@ r6 = &MX11(mx) +@ r7 = &CV1(cv) +.macro mvma_op do_flags + push {r8-r11} + +.if \do_flags + ands r3, r1, #1 @ gteFLAG, shift_need +.else + tst r1, #1 +.endif + ldmia r7, {r7-r9} @ CV123 + ldmia r6!,{r10-r12} @ MX1*,MX2* + asr r1, r7, #20 + lsl r7, #12 @ expand to 64bit + smlalbb r7, r1, r10, r4 @ MX11 * vx + smlaltt r7, r1, r10, r4 @ MX12 * vy + smlalbb r7, r1, r11, r5 @ MX13 * vz + lsrne r7, #12 + orrne r7, r1, lsl #20 @ gteMAC0 +.if \do_flags + asrne r1, #20 + adds r2, r7, #0x80000000 + adcs r1, #0 + orrgt r3, #(1<<30) + orrmi r3, #(1<<31)|(1<<27) + tst r3, #1 @ repeat shift test +.endif + asr r1, r8, #20 + lsl r8, #12 @ expand to 64bit + smlaltb r8, r1, r11, r4 @ MX21 * vx + smlalbt r8, r1, r12, r4 @ MX22 * vy + smlaltb r8, r1, r12, r5 @ MX23 * vz + lsrne r8, #12 + orrne r8, r1, lsl #20 @ gteMAC1 +.if \do_flags + asrne r1, #20 + adds r2, r8, #0x80000000 + adcs r1, #0 + orrgt r3, #(1<<29) + orrmi r3, #(1<<31)|(1<<26) + tst r3, #1 @ repeat shift test +.endif + ldmia r6!,{r10-r11} @ MX3* + asr r1, r9, #20 + lsl r9, #12 @ expand to 64bit + smlalbb r9, r1, r10, r4 @ MX31 * vx + smlaltt r9, r1, r10, r4 @ MX32 * vy + smlalbb r9, r1, r11, r5 @ MX33 * vz + lsrne r9, #12 + orrne r9, r1, lsl #20 @ gteMAC2 +.if \do_flags + asrne r1, #20 + adds r2, r9, #0x80000000 + adcs r1, #0 + orrgt r3, #(1<<28) + orrmi r3, #(1<<31)|(1<<25) + bic r3, #1 +.else + mov r3, #0 +.endif + str r3, [r0, #4*(32+31)] @ gteFLAG + add r1, r0, #4*25 + stmia r1, {r7-r9} + + pop {r8-r11} + bx lr +.endm + +.global gteMVMVA_part_arm +gteMVMVA_part_arm: + mvma_op 1 + .size gteMVMVA_part_arm, .-gteMVMVA_part_arm + +.global gteMVMVA_part_nf_arm +gteMVMVA_part_nf_arm: + mvma_op 0 + .size gteMVMVA_part_nf_arm, .-gteMVMVA_part_nf_arm + +@ common version of MVMVA with cv3 (== 0) and shift12, +@ can't overflow so no gteMAC flags needed +@ note: not std calling convention used +@ r0 = CP2 (d,c) (must preserve) +@ r4,r5 = VXYZ(v) packed +@ r6 = &MX11(mx) +.global gteMVMVA_part_cv3sh12_arm +gteMVMVA_part_cv3sh12_arm: + push {r8-r9} + ldmia r6!,{r7-r9} @ MX1*,MX2* + smulbb r1, r7, r4 @ MX11 * vx + smultt r2, r7, r4 @ MX12 * vy + smulbb r3, r8, r5 @ MX13 * vz + qadd r1, r1, r2 + asr r3, #1 @ prevent oflow, lose a bit + add r1, r3, r1, asr #1 + asr r7, r1, #11 + smultb r1, r8, r4 @ MX21 * vx + smulbt r2, r9, r4 @ MX22 * vy + smultb r3, r9, r5 @ MX23 * vz + qadd r1, r1, r2 + asr r3, #1 + add r1, r3, r1, asr #1 + asr r8, r1, #11 + ldmia r6, {r6,r9} @ MX3* + smulbb r1, r6, r4 @ MX31 * vx + smultt r2, r6, r4 @ MX32 * vy + smulbb r3, r9, r5 @ MX33 * vz + qadd r1, r1, r2 + asr r3, #1 + add r1, r3, r1, asr #1 + asr r9, r1, #11 + add r1, r0, #4*25 + mov r2, #0 + stmia r1, {r7-r9} + str r2, [r0, #4*(32+31)] @ gteFLAG + pop {r8-r9} + bx lr + .size gteMVMVA_part_cv3sh12_arm, .-gteMVMVA_part_cv3sh12_arm + + +.global gteNCLIP_arm @ r0=CP2 (d,c), +gteNCLIP_arm: + push {r4-r6,lr} + ldrsh r4, [r0, #4*12+2] + ldrsh r5, [r0, #4*13+2] + ldrsh r6, [r0, #4*14+2] + ldrsh lr, [r0, #4*12] + ldrsh r2, [r0, #4*13] + sub r12, r4, r5 @ 3: gteSY0 - gteSY1 + sub r5, r5, r6 @ 1: gteSY1 - gteSY2 + smull r1, r5, lr, r5 @ RdLo, RdHi + sub r6, r4 @ 2: gteSY2 - gteSY0 + ldrsh r3, [r0, #4*14] + smlal r1, r5, r2, r6 + mov lr, #0 @ gteFLAG + smlal r1, r5, r3, r12 + mov r6, #1<<31 + orr r6, #1<<15 + movs r2, r1, lsl #1 + adc r5, r5 + cmp r5, #0 +.if HAVE_ARMV7 + movtgt lr, #((1<<31)|(1<<16))>>16 +.else + movgt lr, #(1<<31) + orrgt lr, #(1<<16) +.endif + cmn r5, #1 + orrmi lr, r6 + str r1, [r0, #4*24] + str lr, [r0, #4*(32+31)] @ gteFLAG + + pop {r4-r6,pc} + .size gteNCLIP_arm, .-gteNCLIP_arm + + +.macro gteMACtoIR lm + ldr r2, [r0, #4*25] @ gteMAC1 + mov r1, #1<<15 + ldr r12,[r0, #4*(32+31)] @ gteFLAG + cmp r2, r1 + subge r2, r1, #1 + orrge r12, #(1<<31)|(1<<24) +.if \lm + cmp r2, #0 + movlt r2, #0 +.else + cmn r2, r1 + rsblt r2, r1, #0 +.endif + str r2, [r0, #4*9] + ldrd r2, [r0, #4*26] @ gteMAC23 + orrlt r12, #(1<<31)|(1<<24) + cmp r2, r1 + subge r2, r1, #1 + orrge r12, #1<<23 + orrge r12, #1<<31 +.if \lm + cmp r2, #0 + movlt r2, #0 +.else + cmn r2, r1 + rsblt r2, r1, #0 +.endif + orrlt r12, #1<<23 + orrlt r12, #1<<31 + cmp r3, r1 + subge r3, r1, #1 + orrge r12, #1<<22 +.if \lm + cmp r3, #0 + movlt r3, #0 +.else + cmn r3, r1 + rsblt r3, r1, #0 +.endif + orrlt r12, #1<<22 + strd r2, [r0, #4*10] @ gteIR23 + str r12,[r0, #4*(32+31)] @ gteFLAG + bx lr +.endm + +.global gteMACtoIR_lm0 @ r0=CP2 (d,c) +gteMACtoIR_lm0: + gteMACtoIR 0 + .size gteMACtoIR_lm0, .-gteMACtoIR_lm0 + +.global gteMACtoIR_lm1 @ r0=CP2 (d,c) +gteMACtoIR_lm1: + gteMACtoIR 1 + .size gteMACtoIR_lm1, .-gteMACtoIR_lm1 + + +.global gteMACtoIR_lm0_nf @ r0=CP2 (d,c) +gteMACtoIR_lm0_nf: + add r12, r0, #4*25 + ldmia r12, {r1-r3} + ssatx_prep r12, 16 + ssatx r1, r12, 16 + ssatx r2, r12, 16 + ssatx r3, r12, 16 + add r12, r0, #4*9 + stmia r12, {r1-r3} + bx lr + .size gteMACtoIR_lm0_nf, .-gteMACtoIR_lm0_nf + + +.global gteMACtoIR_lm1_nf @ r0=CP2 (d,c) +gteMACtoIR_lm1_nf: + add r12, r0, #4*25 + ldmia r12, {r1-r3} + ssatx0_prep r12, 16 + ssatx0 r1, r12, 16 + ssatx0 r2, r12, 16 + ssatx0 r3, r12, 16 + add r12, r0, #4*9 + stmia r12, {r1-r3} + bx lr + .size gteMACtoIR_lm1_nf, .-gteMACtoIR_lm1_nf + + +.if 0 +.global gteMVMVA_test +gteMVMVA_test: + push {r4-r7,lr} + push {r1} + and r2, r1, #0x18000 @ v + cmp r2, #0x18000 @ v == 3? + addeq r4, r0, #4*9 + addne r3, r0, r2, lsr #12 + ldmeqia r4, {r3-r5} + ldmneia r3, {r4,r5} + lsleq r3, #16 + lsreq r3, #16 + orreq r4, r3, r4, lsl #16 @ r4,r5 = VXYZ(v) + @and r5, #0xffff + add r12, r0, #4*32 + and r3, r1, #0x60000 @ mx + lsr r3, #17 + add r6, r12, r3, lsl #5 + cmp r3, #3 + adreq r6, zeroes + and r2, r1, #0x06000 @ cv + lsr r2, #13 + add r7, r12, r2, lsl #5 + add r7, #4*5 + cmp r2, #3 + adreq r7, zeroes +.if 1 + adr lr, 1f + bne 0f + tst r1, #1<<19 + bne gteMVMVA_part_cv3sh12_arm +0: + and r1, #1<<19 + lsr r1, #19 + b gteMVMVA_part_arm +1: + pop {r1} + tst r1, #1<<10 + adr lr, 0f + beq gteMACtoIR_lm0 + bne gteMACtoIR_lm1 +0: +.else + bl gteMVMVA_part_neon + pop {r1} + and r1, #1<<10 + bl gteMACtoIR_flags_neon +.endif + pop {r4-r7,pc} + +zeroes: + .word 0,0,0,0,0 +.endif + + +@ vim:filetype=armasm + |