549
edits
Changes
Clean up and simplify
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== Instructions ==
== Instructions ==
+
+== Instructions ==
+Unless noted otherwise, SRC1 and SRC2 refer to their respectively indexed float[4] registers (after swizzling). Similarly, DST refers to its indexed register modulo destination component masking, i.e. an expression like DST=SRC1 might actually just set DST.y to SRC1.y.
+
{| class="wikitable" border="1"
{| class="wikitable" border="1"
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| 1
| 1
| ADD
| ADD
−| Adds two vectors component by component; DST[i] = SRC1[i]+SRC2[i] for all i (modulo destination component masking)
+| Adds two vectors component by component; DST[i] = SRC1[i]+SRC2[i] for all i
|-
|-
| 0x01
| 0x01
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| 1u
| 1u
| EX2
| EX2
−| Computes SRC1's exp component by component; DST[i] = EXP(SRC1[i]) for all i (modulo destination component masking) (base 2)
+| Computes SRC1's per-component exponent with base 2; DST[i] = EXP(SRC1[i]) for all i
|-
|-
| 0x06
| 0x06
| 1u
| 1u
| LG2
| LG2
−| Computes SRC1's log2 component by component; DST[i] = LOG2(SRC1[i]) for all i (modulo destination component masking) (base 2)
+| Computes SRC1's log2 component by component; DST[i] = LOG2(SRC1[i]) for all i
|-
|-
| 0x07
| 0x07
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| 1
| 1
| MUL
| MUL
−| Multiplies two vectors component by component; DST[i] = SRC1[i].SRC2[i] for all i (modulo destination component masking)
+| Multiplies two vectors component by component; DST[i] = SRC1[i].SRC2[i] for all i
|-
|-
| 0x09
| 0x09
| 1
| 1
| SGE
| SGE
−| Sets output if SRC1 is greater than or equal to SRC2; DST[i] = (SRC1[i] >= SRC2[i]) ? 1.0 : 0.0 for all i (modulo destination component masking)
+| Sets output if SRC1 is greater than or equal to SRC2; DST[i] = (SRC1[i] >= SRC2[i]) ? 1.0 : 0.0 for all i
|-
|-
| 0x0A
| 0x0A
| 1
| 1
| SLT
| SLT
−| Sets output if SRC1 is strictly less than SRC2; DST[i] = (SRC1[i] < SRC2[i]) ? 1.0 : 0.0 for all i (modulo destination component masking)
+| Sets output if SRC1 is strictly less than SRC2; DST[i] = (SRC1[i] < SRC2[i]) ? 1.0 : 0.0 for all i
|-
|-
| 0x0B
| 0x0B
| 1u
| 1u
| FLR
| FLR
−| Computes SRC1's floor component by component; DST[i] = FLOOR(SRC1[i]) for all i (modulo destination component masking)
+| Computes SRC1's floor component by component; DST[i] = FLOOR(SRC1[i]) for all i
|-
|-
| 0x0C
| 0x0C
| 1
| 1
| MAX
| MAX
−| Takes the max of two vectors, component by component; DST[i] = MAX(SRC1[i], SRC2[i]) for all i (modulo destination component masking)
+| Takes the max of two vectors, component by component; DST[i] = MAX(SRC1[i], SRC2[i]) for all i
|-
|-
| 0x0D
| 0x0D
| 1
| 1
| MIN
| MIN
−| Takes the min of two vectors, component by component; DST[i] = MIN(SRC1[i], SRC2[i]) for all i (modulo destination component masking)
+| Takes the min of two vectors, component by component; DST[i] = MIN(SRC1[i], SRC2[i]) for all i
|-
|-
| 0x0E
| 0x0E
| 1u
| 1u
| RCP
| RCP
−| Computes the reciprocal of the vector, component by component; DST[i] = 1/SRC1[i] for all i (modulo destination component masking)
+| Computes the reciprocal of the vector, component by component; DST[i] = 1/SRC1[i] for all i
|-
|-
| 0x0F
| 0x0F
| 1u
| 1u
| RSQ
| RSQ
−| Computes the reciprocal of the square root of the vector, component by component; DST[i] = 1/sqrt(SRC1[i]) for all i (modulo destination component masking)
+| Computes the reciprocal of the square root of the vector, component by component; DST[i] = 1/sqrt(SRC1[i]) for all i
|-
|-
| 0x10
| 0x10
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| 1u
| 1u
| MOVA
| MOVA
−| Move to address register; Casts the float uniform given by SRC1 to an integer (truncating the fractional part) and assigns the result to (a0.x, a0.y, _, _) (modulo destination component masking).
+| Move to address register; Casts the float uniform given by SRC1 to an integer (truncating the fractional part) and assigns the result to (a0.x, a0.y, _, _), respecting the destination component mask.
|-
|-
| 0x13
| 0x13
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| 1i
| 1i
| SGEI
| SGEI
−| Sets output if SRC1 is greater than or equal to SRC2; DST[i] = (SRC1[i] >= SRC2[i]) ? 1.0 : 0.0 for all i (modulo destination component masking)
+| Sets output if SRC1 is greater than or equal to SRC2; DST[i] = (SRC1[i] >= SRC2[i]) ? 1.0 : 0.0 for all i
|-
|-
| 0x1B
| 0x1B
| 1i
| 1i
| SLTI
| SLTI
−| Sets output if SRC1 is strictly less than SRC2; DST[i] = (SRC1[i] < SRC2[i]) ? 1.0 : 0.0 for all i (modulo destination component masking)
+| Sets output if SRC1 is strictly less than SRC2; DST[i] = (SRC1[i] < SRC2[i]) ? 1.0 : 0.0 for all i
|-
|-
| 0x1C
| 0x1C
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| 1c
| 1c
| CMP
| CMP
−| Sets booleans cmp.x and cmp.y based on the operand's x and y components and the CMPX and CMPY comparison operators respectively. See [[#Comparison_operator|below]] for details about operators.
+| Sets booleans cmp.x and cmp.y based on the operand's x and y components and the CMPX and CMPY comparison operators respectively. See [[#Comparison_operator|below]] for details about operators. It's unknown whether CMP respects the destination component mask or not.
|-
|-
| 0x30-0x37
| 0x30-0x37
| 5i
| 5i
| MADI
| MADI
−| Multiplies two vectors and adds a third one component by component; DST[i] = SRC3[i] + SRC2[i].SRC1[i] for all i (modulo destination component masking)
+| Multiplies two vectors and adds a third one component by component; DST[i] = SRC3[i] + SRC2[i].SRC1[i] for all i
|-
|-
| 0x38-0x3F
| 0x38-0x3F
| 5
| 5
| MAD
| MAD
−| Multiplies two vectors and adds a third one component by component; DST[i] = SRC3[i] + SRC2[i].SRC1[i] for all i (modulo destination component masking)
+| Multiplies two vectors and adds a third one component by component; DST[i] = SRC3[i] + SRC2[i].SRC1[i] for all i
|}
|}